1270 lines
38 KiB
C
1270 lines
38 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-06-01 KyleChan first version
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include <rtdevice.h>
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#define DBG_TAG "UART"
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#define DBG_LVL DBG_INFO
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#include <rtdbg.h>
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#ifdef RT_USING_POSIX_STDIO
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#include <unistd.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <sys/ioctl.h>
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#ifdef getc
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#undef getc
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#endif
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#ifdef putc
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#undef putc
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#endif
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static rt_err_t serial_fops_rx_ind(rt_device_t dev, rt_size_t size)
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{
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rt_wqueue_wakeup(&(dev->wait_queue), (void*)POLLIN);
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return RT_EOK;
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}
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/* fops for serial */
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static int serial_fops_open(struct dfs_fd *fd)
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{
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rt_err_t ret = 0;
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rt_uint16_t flags = 0;
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rt_device_t device;
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device = (rt_device_t)fd->data;
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RT_ASSERT(device != RT_NULL);
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switch (fd->flags & O_ACCMODE)
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{
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case O_RDONLY:
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LOG_D("fops open: O_RDONLY!");
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flags = RT_DEVICE_FLAG_RDONLY;
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break;
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case O_WRONLY:
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LOG_D("fops open: O_WRONLY!");
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flags = RT_DEVICE_FLAG_WRONLY;
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break;
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case O_RDWR:
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LOG_D("fops open: O_RDWR!");
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flags = RT_DEVICE_FLAG_RDWR;
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break;
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default:
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LOG_E("fops open: unknown mode - %d!", fd->flags & O_ACCMODE);
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break;
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}
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if ((fd->flags & O_ACCMODE) != O_WRONLY)
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rt_device_set_rx_indicate(device, serial_fops_rx_ind);
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ret = rt_device_open(device, flags);
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if (ret == RT_EOK) return 0;
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return ret;
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}
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static int serial_fops_close(struct dfs_fd *fd)
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{
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rt_device_t device;
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device = (rt_device_t)fd->data;
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rt_device_set_rx_indicate(device, RT_NULL);
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rt_device_close(device);
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return 0;
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}
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static int serial_fops_ioctl(struct dfs_fd *fd, int cmd, void *args)
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{
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rt_device_t device;
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device = (rt_device_t)fd->data;
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switch (cmd)
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{
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case FIONREAD:
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break;
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case FIONWRITE:
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break;
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}
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return rt_device_control(device, cmd, args);
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}
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static int serial_fops_read(struct dfs_fd *fd, void *buf, size_t count)
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{
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int size = 0;
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rt_device_t device;
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device = (rt_device_t)fd->data;
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do
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{
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size = rt_device_read(device, -1, buf, count);
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if (size <= 0)
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{
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if (fd->flags & O_NONBLOCK)
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{
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size = -EAGAIN;
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break;
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}
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rt_wqueue_wait(&(device->wait_queue), 0, RT_WAITING_FOREVER);
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}
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}while (size <= 0);
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return size;
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}
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static int serial_fops_write(struct dfs_fd *fd, const void *buf, size_t count)
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{
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rt_device_t device;
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device = (rt_device_t)fd->data;
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return rt_device_write(device, -1, buf, count);
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}
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static int serial_fops_poll(struct dfs_fd *fd, struct rt_pollreq *req)
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{
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int mask = 0;
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int flags = 0;
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rt_device_t device;
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struct rt_serial_device *serial;
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device = (rt_device_t)fd->data;
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RT_ASSERT(device != RT_NULL);
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serial = (struct rt_serial_device *)device;
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/* only support POLLIN */
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flags = fd->flags & O_ACCMODE;
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if (flags == O_RDONLY || flags == O_RDWR)
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{
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rt_base_t level;
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struct rt_serial_rx_fifo* rx_fifo;
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rt_poll_add(&(device->wait_queue), req);
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rx_fifo = (struct rt_serial_rx_fifo*) serial->serial_rx;
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level = rt_hw_interrupt_disable();
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if (rt_ringbuffer_data_len(&rx_fifo->rb))
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mask |= POLLIN;
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rt_hw_interrupt_enable(level);
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}
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// mask|=POLLOUT;
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return mask;
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}
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const static struct dfs_file_ops _serial_fops =
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{
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serial_fops_open,
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serial_fops_close,
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serial_fops_ioctl,
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serial_fops_read,
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serial_fops_write,
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RT_NULL, /* flush */
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RT_NULL, /* lseek */
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RT_NULL, /* getdents */
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serial_fops_poll,
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};
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#endif /* RT_USING_POSIX_STDIO */
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static rt_size_t rt_serial_get_linear_buffer(struct rt_ringbuffer *rb,
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rt_uint8_t **ptr)
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{
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rt_size_t size;
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RT_ASSERT(rb != RT_NULL);
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*ptr = RT_NULL;
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/* whether has enough data */
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size = rt_ringbuffer_data_len(rb);
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/* no data */
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if (size == 0)
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return 0;
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*ptr = &rb->buffer_ptr[rb->read_index];
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if(rb->buffer_size - rb->read_index > size)
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{
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return size;
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}
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return rb->buffer_size - rb->read_index;
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}
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static rt_size_t rt_serial_update_read_index(struct rt_ringbuffer *rb,
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rt_uint16_t read_index)
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{
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rt_size_t size;
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RT_ASSERT(rb != RT_NULL);
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/* whether has enough data */
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size = rt_ringbuffer_data_len(rb);
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/* no data */
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if (size == 0)
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return 0;
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/* less data */
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if(size < read_index)
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read_index = size;
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if(rb->buffer_size - rb->read_index > read_index)
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{
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rb->read_index += read_index;
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return read_index;
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}
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read_index = rb->buffer_size - rb->read_index;
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/* we are going into the other side of the mirror */
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rb->read_mirror = ~rb->read_mirror;
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rb->read_index = 0;
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return read_index;
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}
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static rt_size_t rt_serial_update_write_index(struct rt_ringbuffer *rb,
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rt_uint16_t write_index)
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{
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rt_uint16_t size;
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RT_ASSERT(rb != RT_NULL);
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/* whether has enough space */
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size = rt_ringbuffer_space_len(rb);
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/* no space */
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if (size == 0)
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return 0;
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/* drop some data */
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if (size < write_index)
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write_index = size;
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if (rb->buffer_size - rb->write_index > write_index)
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{
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/* this should not cause overflow because there is enough space for
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* length of data in current mirror */
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rb->write_index += write_index;
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return write_index;
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}
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/* we are going into the other side of the mirror */
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rb->write_mirror = ~rb->write_mirror;
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rb->write_index = write_index - (rb->buffer_size - rb->write_index);
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return write_index;
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}
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/**
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* @brief Serial polling receive data routine, This function will receive data
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* in a continuous loop by one by one byte.
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* @param dev The pointer of device driver structure
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* @param pos Empty parameter.
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* @param buffer Receive data buffer.
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* @param size Receive data buffer length.
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* @return Return the final length of data received.
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*/
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rt_size_t _serial_poll_rx(struct rt_device *dev,
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rt_off_t pos,
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void *buffer,
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rt_size_t size)
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{
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struct rt_serial_device *serial;
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rt_size_t getc_size;
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int getc_element; /* Gets one byte of data received */
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rt_uint8_t *getc_buffer; /* Pointer to the receive data buffer */
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RT_ASSERT(dev != RT_NULL);
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serial = (struct rt_serial_device *)dev;
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RT_ASSERT(serial != RT_NULL);
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getc_buffer = (rt_uint8_t *)buffer;
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getc_size = size;
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while(size)
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{
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getc_element = serial->ops->getc(serial);
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if (getc_element == -1) break;
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*getc_buffer = getc_element;
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++ getc_buffer;
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-- size;
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if (serial->parent.open_flag & RT_DEVICE_FLAG_STREAM)
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{
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/* If open_flag satisfies RT_DEVICE_FLAG_STREAM
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* and the received character is '\n', exit the loop directly */
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if (getc_element == '\n') break;
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}
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}
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return getc_size - size;
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}
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/**
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* @brief Serial polling transmit data routines, This function will transmit
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* data in a continuous loop by one by one byte.
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* @param dev The pointer of device driver structure
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* @param pos Empty parameter.
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* @param buffer Transmit data buffer.
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* @param size Transmit data buffer length.
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* @return Return the final length of data received.
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*/
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rt_size_t _serial_poll_tx(struct rt_device *dev,
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rt_off_t pos,
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const void *buffer,
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rt_size_t size)
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{
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struct rt_serial_device *serial;
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rt_size_t putc_size;
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rt_uint8_t *putc_buffer; /* Pointer to the transmit data buffer */
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RT_ASSERT(dev != RT_NULL);
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serial = (struct rt_serial_device *)dev;
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RT_ASSERT(serial != RT_NULL);
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putc_buffer = (rt_uint8_t *)buffer;
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putc_size = size;
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while (size)
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{
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if (serial->parent.open_flag & RT_DEVICE_FLAG_STREAM)
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{
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/* If open_flag satisfies RT_DEVICE_FLAG_STREAM and the received character is '\n',
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* inserts '\r' character before '\n' character for the effect of carriage return newline */
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if (*putc_buffer == '\n')
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serial->ops->putc(serial, '\r');
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}
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serial->ops->putc(serial, *putc_buffer);
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++ putc_buffer;
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-- size;
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}
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return putc_size - size;
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}
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/**
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* @brief Serial receive data routines, This function will receive
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* data by using fifo
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* @param dev The pointer of device driver structure
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* @param pos Empty parameter.
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* @param buffer Receive data buffer.
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* @param size Receive data buffer length.
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* @return Return the final length of data received.
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*/
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static rt_size_t _serial_fifo_rx(struct rt_device *dev,
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rt_off_t pos,
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void *buffer,
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rt_size_t size)
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{
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struct rt_serial_device *serial;
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struct rt_serial_rx_fifo *rx_fifo;
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rt_base_t level;
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rt_size_t recv_len; /* The length of data from the ringbuffer */
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RT_ASSERT(dev != RT_NULL);
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if (size == 0) return 0;
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serial = (struct rt_serial_device *)dev;
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RT_ASSERT((serial != RT_NULL) && (buffer != RT_NULL));
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rx_fifo = (struct rt_serial_rx_fifo *) serial->serial_rx;
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if (dev->open_flag & RT_SERIAL_RX_BLOCKING)
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{
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if (size > serial->config.rx_bufsz)
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{
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LOG_W("(%s) serial device received data:[%d] larger than "
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"rx_bufsz:[%d], please increase the BSP_UARTx_RX_BUFSIZE option",
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dev->parent.name, size, serial->config.rx_bufsz);
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return 0;
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}
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/* Get the length of the data from the ringbuffer */
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recv_len = rt_ringbuffer_data_len(&(rx_fifo->rb));
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if (recv_len < size)
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{
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/* When recv_len is less than size, rx_cpt_index is updated to the size
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* and rt_current_thread is suspend until rx_cpt_index is equal to 0 */
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rx_fifo->rx_cpt_index = size;
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rt_completion_wait(&(rx_fifo->rx_cpt), RT_WAITING_FOREVER);
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}
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}
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/* This part of the code is open_flag as RT_SERIAL_RX_NON_BLOCKING */
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level = rt_hw_interrupt_disable();
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/* When open_flag is RT_SERIAL_RX_NON_BLOCKING,
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* the data is retrieved directly from the ringbuffer and returned */
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recv_len = rt_ringbuffer_get(&(rx_fifo->rb), buffer, size);
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rt_hw_interrupt_enable(level);
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return recv_len;
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}
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/**
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* @brief Serial transmit data routines, This function will transmit
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* data by using blocking_nbuf.
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* @param dev The pointer of device driver structure
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* @param pos Empty parameter.
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* @param buffer Transmit data buffer.
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* @param size Transmit data buffer length.
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* @return Return the final length of data transmit.
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*/
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static rt_size_t _serial_fifo_tx_blocking_nbuf(struct rt_device *dev,
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rt_off_t pos,
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const void *buffer,
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rt_size_t size)
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{
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struct rt_serial_device *serial;
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struct rt_serial_tx_fifo *tx_fifo = RT_NULL;
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RT_ASSERT(dev != RT_NULL);
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if (size == 0) return 0;
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serial = (struct rt_serial_device *)dev;
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RT_ASSERT((serial != RT_NULL) && (buffer != RT_NULL));
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tx_fifo = (struct rt_serial_tx_fifo *) serial->serial_tx;
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RT_ASSERT(tx_fifo != RT_NULL);
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/* When serial transmit in tx_blocking mode,
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* if the activated mode is RT_TRUE, it will return directly */
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if (tx_fifo->activated == RT_TRUE) return 0;
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tx_fifo->activated = RT_TRUE;
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/* Call the transmit interface for transmission */
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serial->ops->transmit(serial,
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(rt_uint8_t *)buffer,
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size,
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RT_SERIAL_TX_BLOCKING);
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/* Waiting for the transmission to complete */
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rt_completion_wait(&(tx_fifo->tx_cpt), RT_WAITING_FOREVER);
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return size;
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}
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/**
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* @brief Serial transmit data routines, This function will transmit
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* data by using blocking_buf.
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* @param dev The pointer of device driver structure
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* @param pos Empty parameter.
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* @param buffer Transmit data buffer.
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* @param size Transmit data buffer length.
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* @return Return the final length of data transmit.
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*/
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static rt_size_t _serial_fifo_tx_blocking_buf(struct rt_device *dev,
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rt_off_t pos,
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const void *buffer,
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rt_size_t size)
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{
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struct rt_serial_device *serial;
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struct rt_serial_tx_fifo *tx_fifo = RT_NULL;
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RT_ASSERT(dev != RT_NULL);
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if (size == 0) return 0;
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serial = (struct rt_serial_device *)dev;
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RT_ASSERT((serial != RT_NULL) && (buffer != RT_NULL));
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tx_fifo = (struct rt_serial_tx_fifo *) serial->serial_tx;
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RT_ASSERT(tx_fifo != RT_NULL);
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/* When serial transmit in tx_blocking mode,
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* if the activated mode is RT_TRUE, it will return directly */
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if (tx_fifo->activated == RT_TRUE) return 0;
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tx_fifo->activated = RT_TRUE;
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rt_size_t length = size;
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rt_size_t offset = 0;
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while (size)
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{
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/* Copy one piece of data into the ringbuffer at a time
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* until the length of the data is equal to size */
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tx_fifo->put_size = rt_ringbuffer_put(&(tx_fifo->rb),
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(rt_uint8_t *)buffer + offset,
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size);
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offset += tx_fifo->put_size;
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size -= tx_fifo->put_size;
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/* Call the transmit interface for transmission */
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serial->ops->transmit(serial,
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(rt_uint8_t *)buffer + offset,
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tx_fifo->put_size,
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RT_SERIAL_TX_BLOCKING);
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/* Waiting for the transmission to complete */
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rt_completion_wait(&(tx_fifo->tx_cpt), RT_WAITING_FOREVER);
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}
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return length;
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}
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|
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/**
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* @brief Serial transmit data routines, This function will transmit
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* data by using nonblocking.
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* @param dev The pointer of device driver structure
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* @param pos Empty parameter.
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* @param buffer Transmit data buffer.
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* @param size Transmit data buffer length.
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* @return Return the final length of data transmit.
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*/
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static rt_size_t _serial_fifo_tx_nonblocking(struct rt_device *dev,
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rt_off_t pos,
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const void *buffer,
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rt_size_t size)
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{
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struct rt_serial_device *serial;
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struct rt_serial_tx_fifo *tx_fifo;
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rt_base_t level;
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rt_size_t length;
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|
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RT_ASSERT(dev != RT_NULL);
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if (size == 0) return 0;
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serial = (struct rt_serial_device *)dev;
|
|
RT_ASSERT((serial != RT_NULL) && (buffer != RT_NULL));
|
|
tx_fifo = (struct rt_serial_tx_fifo *) serial->serial_tx;
|
|
|
|
level = rt_hw_interrupt_disable();
|
|
|
|
if (tx_fifo->activated == RT_FALSE)
|
|
{
|
|
/* When serial transmit in tx_non_blocking mode, if the activated mode is RT_FALSE,
|
|
* start copying data into the ringbuffer */
|
|
tx_fifo->activated = RT_TRUE;
|
|
/* Copying data into the ringbuffer */
|
|
length = rt_ringbuffer_put(&(tx_fifo->rb), buffer, size);
|
|
|
|
rt_hw_interrupt_enable(level);
|
|
|
|
rt_uint8_t *put_ptr = RT_NULL;
|
|
/* Get the linear length buffer from rinbuffer */
|
|
tx_fifo->put_size = rt_serial_get_linear_buffer(&(tx_fifo->rb), &put_ptr);
|
|
/* Call the transmit interface for transmission */
|
|
serial->ops->transmit(serial,
|
|
put_ptr,
|
|
tx_fifo->put_size,
|
|
RT_SERIAL_TX_NON_BLOCKING);
|
|
/* In tx_nonblocking mode, there is no need to call rt_completion_wait() APIs to wait
|
|
* for the rt_current_thread to resume */
|
|
return length;
|
|
}
|
|
|
|
/* If the activated mode is RT_FALSE, it means that serial device is transmitting,
|
|
* where only the data in the ringbuffer and there is no need to call the transmit() API.
|
|
* Note that this part of the code requires disable interrupts
|
|
* to prevent multi thread reentrant */
|
|
|
|
/* Copying data into the ringbuffer */
|
|
length = rt_ringbuffer_put(&(tx_fifo->rb), buffer, size);
|
|
|
|
rt_hw_interrupt_enable(level);
|
|
|
|
return length;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Enable serial transmit mode.
|
|
* @param dev The pointer of device driver structure
|
|
* @param rx_oflag The flag of that the serial port opens.
|
|
* @return Return the status of the operation.
|
|
*/
|
|
static rt_err_t rt_serial_tx_enable(struct rt_device *dev,
|
|
rt_uint16_t tx_oflag)
|
|
{
|
|
struct rt_serial_device *serial;
|
|
struct rt_serial_tx_fifo *tx_fifo = RT_NULL;
|
|
|
|
RT_ASSERT(dev != RT_NULL);
|
|
serial = (struct rt_serial_device *)dev;
|
|
|
|
if (serial->config.tx_bufsz == 0)
|
|
{
|
|
/* Cannot use RT_SERIAL_TX_NON_BLOCKING when tx_bufsz is 0 */
|
|
if (tx_oflag == RT_SERIAL_TX_NON_BLOCKING)
|
|
{
|
|
LOG_E("(%s) serial device with misconfigure: tx_bufsz = 0",
|
|
dev->parent.name);
|
|
return -RT_EINVAL;
|
|
}
|
|
|
|
#ifndef RT_USING_DEVICE_OPS
|
|
dev->write = _serial_poll_tx;
|
|
#endif
|
|
|
|
dev->open_flag |= RT_SERIAL_TX_BLOCKING;
|
|
return RT_EOK;
|
|
}
|
|
/* Limits the minimum value of tx_bufsz */
|
|
if (serial->config.tx_bufsz < RT_SERIAL_TX_MINBUFSZ)
|
|
serial->config.tx_bufsz = RT_SERIAL_TX_MINBUFSZ;
|
|
|
|
if (tx_oflag == RT_SERIAL_TX_BLOCKING)
|
|
{
|
|
/* When using RT_SERIAL_TX_BLOCKING, it is necessary to determine
|
|
* whether serial device needs to use buffer */
|
|
rt_err_t optmode; /* The operating mode used by serial device */
|
|
/* Call the Control() API to get the operating mode */
|
|
optmode = serial->ops->control(serial,
|
|
RT_DEVICE_CHECK_OPTMODE,
|
|
(void *)RT_DEVICE_FLAG_TX_BLOCKING);
|
|
if (optmode == RT_SERIAL_TX_BLOCKING_BUFFER)
|
|
{
|
|
/* If use RT_SERIAL_TX_BLOCKING_BUFFER, the ringbuffer is initialized */
|
|
tx_fifo = (struct rt_serial_tx_fifo *) rt_malloc
|
|
(sizeof(struct rt_serial_tx_fifo) + serial->config.tx_bufsz);
|
|
RT_ASSERT(tx_fifo != RT_NULL);
|
|
|
|
rt_ringbuffer_init(&(tx_fifo->rb),
|
|
tx_fifo->buffer,
|
|
serial->config.tx_bufsz);
|
|
serial->serial_tx = tx_fifo;
|
|
|
|
#ifndef RT_USING_DEVICE_OPS
|
|
dev->write = _serial_fifo_tx_blocking_buf;
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
/* If not use RT_SERIAL_TX_BLOCKING_BUFFER,
|
|
* the control() API is called to configure the serial device */
|
|
tx_fifo = (struct rt_serial_tx_fifo*) rt_malloc
|
|
(sizeof(struct rt_serial_tx_fifo));
|
|
RT_ASSERT(tx_fifo != RT_NULL);
|
|
|
|
serial->serial_tx = tx_fifo;
|
|
|
|
#ifndef RT_USING_DEVICE_OPS
|
|
dev->write = _serial_fifo_tx_blocking_nbuf;
|
|
#endif
|
|
|
|
/* Call the control() API to configure the serial device by RT_SERIAL_TX_BLOCKING*/
|
|
serial->ops->control(serial,
|
|
RT_DEVICE_CTRL_CONFIG,
|
|
(void *)RT_SERIAL_TX_BLOCKING);
|
|
}
|
|
|
|
tx_fifo->activated = RT_FALSE;
|
|
tx_fifo->put_size = 0;
|
|
rt_completion_init(&(tx_fifo->tx_cpt));
|
|
dev->open_flag |= RT_SERIAL_TX_BLOCKING;
|
|
|
|
return RT_EOK;
|
|
}
|
|
/* When using RT_SERIAL_TX_NON_BLOCKING, ringbuffer needs to be initialized,
|
|
* and initialize the tx_fifo->activated value is RT_FALSE.
|
|
*/
|
|
tx_fifo = (struct rt_serial_tx_fifo *) rt_malloc
|
|
(sizeof(struct rt_serial_tx_fifo) + serial->config.tx_bufsz);
|
|
RT_ASSERT(tx_fifo != RT_NULL);
|
|
|
|
tx_fifo->activated = RT_FALSE;
|
|
tx_fifo->put_size = 0;
|
|
rt_ringbuffer_init(&(tx_fifo->rb),
|
|
tx_fifo->buffer,
|
|
serial->config.tx_bufsz);
|
|
serial->serial_tx = tx_fifo;
|
|
|
|
#ifndef RT_USING_DEVICE_OPS
|
|
dev->write = _serial_fifo_tx_nonblocking;
|
|
#endif
|
|
|
|
dev->open_flag |= RT_SERIAL_TX_NON_BLOCKING;
|
|
/* Call the control() API to configure the serial device by RT_SERIAL_TX_NON_BLOCKING*/
|
|
serial->ops->control(serial,
|
|
RT_DEVICE_CTRL_CONFIG,
|
|
(void *)RT_SERIAL_TX_NON_BLOCKING);
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Enable serial receive mode.
|
|
* @param dev The pointer of device driver structure
|
|
* @param rx_oflag The flag of that the serial port opens.
|
|
* @return Return the status of the operation.
|
|
*/
|
|
static rt_err_t rt_serial_rx_enable(struct rt_device *dev,
|
|
rt_uint16_t rx_oflag)
|
|
{
|
|
struct rt_serial_device *serial;
|
|
struct rt_serial_rx_fifo *rx_fifo = RT_NULL;
|
|
|
|
RT_ASSERT(dev != RT_NULL);
|
|
serial = (struct rt_serial_device *)dev;
|
|
|
|
if (serial->config.rx_bufsz == 0)
|
|
{
|
|
/* Cannot use RT_SERIAL_RX_NON_BLOCKING when rx_bufsz is 0 */
|
|
if (rx_oflag == RT_SERIAL_RX_NON_BLOCKING)
|
|
{
|
|
LOG_E("(%s) serial device with misconfigure: rx_bufsz = 0",
|
|
dev->parent.name);
|
|
return -RT_EINVAL;
|
|
}
|
|
|
|
#ifndef RT_USING_DEVICE_OPS
|
|
dev->read = _serial_poll_rx;
|
|
#endif
|
|
|
|
dev->open_flag |= RT_SERIAL_RX_BLOCKING;
|
|
return RT_EOK;
|
|
}
|
|
/* Limits the minimum value of rx_bufsz */
|
|
if (serial->config.rx_bufsz < RT_SERIAL_RX_MINBUFSZ)
|
|
serial->config.rx_bufsz = RT_SERIAL_RX_MINBUFSZ;
|
|
|
|
rx_fifo = (struct rt_serial_rx_fifo *) rt_malloc
|
|
(sizeof(struct rt_serial_rx_fifo) + serial->config.rx_bufsz);
|
|
|
|
RT_ASSERT(rx_fifo != RT_NULL);
|
|
rt_ringbuffer_init(&(rx_fifo->rb), rx_fifo->buffer, serial->config.rx_bufsz);
|
|
|
|
serial->serial_rx = rx_fifo;
|
|
|
|
#ifndef RT_USING_DEVICE_OPS
|
|
dev->read = _serial_fifo_rx;
|
|
#endif
|
|
|
|
if (rx_oflag == RT_SERIAL_RX_NON_BLOCKING)
|
|
{
|
|
dev->open_flag |= RT_SERIAL_RX_NON_BLOCKING;
|
|
/* Call the control() API to configure the serial device by RT_SERIAL_RX_NON_BLOCKING*/
|
|
serial->ops->control(serial,
|
|
RT_DEVICE_CTRL_CONFIG,
|
|
(void *) RT_SERIAL_RX_NON_BLOCKING);
|
|
|
|
return RT_EOK;
|
|
}
|
|
/* When using RT_SERIAL_RX_BLOCKING, rt_completion_init() and rx_cpt_index are initialized */
|
|
rx_fifo->rx_cpt_index = 0;
|
|
rt_completion_init(&(rx_fifo->rx_cpt));
|
|
dev->open_flag |= RT_SERIAL_RX_BLOCKING;
|
|
/* Call the control() API to configure the serial device by RT_SERIAL_RX_BLOCKING*/
|
|
serial->ops->control(serial,
|
|
RT_DEVICE_CTRL_CONFIG,
|
|
(void *) RT_SERIAL_RX_BLOCKING);
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
/**
|
|
* @brief Disable serial receive mode.
|
|
* @param dev The pointer of device driver structure
|
|
* @param rx_oflag The flag of that the serial port opens.
|
|
* @return Return the status of the operation.
|
|
*/
|
|
static rt_err_t rt_serial_rx_disable(struct rt_device *dev,
|
|
rt_uint16_t rx_oflag)
|
|
{
|
|
struct rt_serial_device *serial;
|
|
struct rt_serial_rx_fifo *rx_fifo;
|
|
|
|
RT_ASSERT(dev != RT_NULL);
|
|
serial = (struct rt_serial_device *)dev;
|
|
|
|
#ifndef RT_USING_DEVICE_OPS
|
|
dev->read = RT_NULL;
|
|
#endif
|
|
|
|
if (serial->serial_rx == RT_NULL) return RT_EOK;
|
|
|
|
do
|
|
{
|
|
if (rx_oflag == RT_SERIAL_RX_NON_BLOCKING)
|
|
{
|
|
dev->open_flag &= ~ RT_SERIAL_RX_NON_BLOCKING;
|
|
serial->ops->control(serial,
|
|
RT_DEVICE_CTRL_CLR_INT,
|
|
(void *)RT_SERIAL_RX_NON_BLOCKING);
|
|
break;
|
|
}
|
|
|
|
dev->open_flag &= ~ RT_SERIAL_RX_BLOCKING;
|
|
serial->ops->control(serial,
|
|
RT_DEVICE_CTRL_CLR_INT,
|
|
(void *)RT_SERIAL_RX_BLOCKING);
|
|
} while (0);
|
|
|
|
rx_fifo = (struct rt_serial_rx_fifo *)serial->serial_rx;
|
|
RT_ASSERT(rx_fifo != RT_NULL);
|
|
rt_free(rx_fifo);
|
|
serial->serial_rx = RT_NULL;
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
/**
|
|
* @brief Disable serial tranmit mode.
|
|
* @param dev The pointer of device driver structure
|
|
* @param rx_oflag The flag of that the serial port opens.
|
|
* @return Return the status of the operation.
|
|
*/
|
|
static rt_err_t rt_serial_tx_disable(struct rt_device *dev,
|
|
rt_uint16_t tx_oflag)
|
|
{
|
|
struct rt_serial_device *serial;
|
|
struct rt_serial_tx_fifo *tx_fifo;
|
|
|
|
RT_ASSERT(dev != RT_NULL);
|
|
serial = (struct rt_serial_device *)dev;
|
|
|
|
#ifndef RT_USING_DEVICE_OPS
|
|
dev->write = RT_NULL;
|
|
#endif
|
|
|
|
if (serial->serial_tx == RT_NULL) return RT_EOK;
|
|
|
|
tx_fifo = (struct rt_serial_tx_fifo *)serial->serial_tx;
|
|
RT_ASSERT(tx_fifo != RT_NULL);
|
|
|
|
do
|
|
{
|
|
if (tx_oflag == RT_SERIAL_TX_NON_BLOCKING)
|
|
{
|
|
dev->open_flag &= ~ RT_SERIAL_TX_NON_BLOCKING;
|
|
|
|
serial->ops->control(serial,
|
|
RT_DEVICE_CTRL_CLR_INT,
|
|
(void *)RT_SERIAL_TX_NON_BLOCKING);
|
|
break;
|
|
}
|
|
|
|
rt_completion_done(&(tx_fifo->tx_cpt));
|
|
dev->open_flag &= ~ RT_SERIAL_TX_BLOCKING;
|
|
serial->ops->control(serial,
|
|
RT_DEVICE_CTRL_CLR_INT,
|
|
(void *)RT_SERIAL_TX_BLOCKING);
|
|
} while (0);
|
|
|
|
rt_free(tx_fifo);
|
|
serial->serial_tx = RT_NULL;
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
/**
|
|
* @brief Initialize the serial device.
|
|
* @param dev The pointer of device driver structure
|
|
* @return Return the status of the operation.
|
|
*/
|
|
static rt_err_t rt_serial_init(struct rt_device *dev)
|
|
{
|
|
rt_err_t result = RT_EOK;
|
|
struct rt_serial_device *serial;
|
|
|
|
RT_ASSERT(dev != RT_NULL);
|
|
serial = (struct rt_serial_device *)dev;
|
|
|
|
/* initialize rx/tx */
|
|
serial->serial_rx = RT_NULL;
|
|
serial->serial_tx = RT_NULL;
|
|
|
|
/* apply configuration */
|
|
if (serial->ops->configure)
|
|
result = serial->ops->configure(serial, &serial->config);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* @brief Open the serial device.
|
|
* @param dev The pointer of device driver structure
|
|
* @param oflag The flag of that the serial port opens.
|
|
* @return Return the status of the operation.
|
|
*/
|
|
static rt_err_t rt_serial_open(struct rt_device *dev, rt_uint16_t oflag)
|
|
{
|
|
struct rt_serial_device *serial;
|
|
|
|
RT_ASSERT(dev != RT_NULL);
|
|
serial = (struct rt_serial_device *)dev;
|
|
|
|
/* Check that the device has been turned on */
|
|
if ((dev->open_flag) & (15 << 12))
|
|
{
|
|
LOG_D("(%s) serial device has already been opened, it will run in its original configuration", dev->parent.name);
|
|
return RT_EOK;
|
|
}
|
|
|
|
LOG_D("open serial device: 0x%08x with open flag: 0x%04x",
|
|
dev, oflag);
|
|
|
|
/* By default, the receive mode of a serial devide is RT_SERIAL_RX_NON_BLOCKING */
|
|
if ((oflag & RT_SERIAL_RX_BLOCKING) == RT_SERIAL_RX_BLOCKING)
|
|
dev->open_flag |= RT_SERIAL_RX_BLOCKING;
|
|
else
|
|
dev->open_flag |= RT_SERIAL_RX_NON_BLOCKING;
|
|
|
|
/* By default, the transmit mode of a serial devide is RT_SERIAL_TX_BLOCKING */
|
|
if ((oflag & RT_SERIAL_TX_NON_BLOCKING) == RT_SERIAL_TX_NON_BLOCKING)
|
|
dev->open_flag |= RT_SERIAL_TX_NON_BLOCKING;
|
|
else
|
|
dev->open_flag |= RT_SERIAL_TX_BLOCKING;
|
|
|
|
/* set steam flag */
|
|
if ((oflag & RT_DEVICE_FLAG_STREAM) ||
|
|
(dev->open_flag & RT_DEVICE_FLAG_STREAM))
|
|
dev->open_flag |= RT_DEVICE_FLAG_STREAM;
|
|
|
|
/* initialize the Rx structure according to open flag */
|
|
if (serial->serial_rx == RT_NULL)
|
|
rt_serial_rx_enable(dev, dev->open_flag &
|
|
(RT_SERIAL_RX_BLOCKING | RT_SERIAL_RX_NON_BLOCKING));
|
|
|
|
/* initialize the Tx structure according to open flag */
|
|
if (serial->serial_tx == RT_NULL)
|
|
rt_serial_tx_enable(dev, dev->open_flag &
|
|
(RT_SERIAL_TX_BLOCKING | RT_SERIAL_TX_NON_BLOCKING));
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Close the serial device.
|
|
* @param dev The pointer of device driver structure
|
|
* @return Return the status of the operation.
|
|
*/
|
|
static rt_err_t rt_serial_close(struct rt_device *dev)
|
|
{
|
|
struct rt_serial_device *serial;
|
|
|
|
RT_ASSERT(dev != RT_NULL);
|
|
serial = (struct rt_serial_device *)dev;
|
|
|
|
/* this device has more reference count */
|
|
if (dev->ref_count > 1) return -RT_ERROR;
|
|
/* Disable serial receive mode. */
|
|
rt_serial_rx_disable(dev, dev->open_flag &
|
|
(RT_SERIAL_RX_BLOCKING | RT_SERIAL_RX_NON_BLOCKING));
|
|
/* Disable serial tranmit mode. */
|
|
rt_serial_tx_disable(dev, dev->open_flag &
|
|
(RT_SERIAL_TX_BLOCKING | RT_SERIAL_TX_NON_BLOCKING));
|
|
|
|
/* Clear the callback function */
|
|
serial->parent.rx_indicate = RT_NULL;
|
|
serial->parent.tx_complete = RT_NULL;
|
|
|
|
/* Call the control() API to close the serial device */
|
|
serial->ops->control(serial, RT_DEVICE_CTRL_CLOSE, RT_NULL);
|
|
dev->flag &= ~RT_DEVICE_FLAG_ACTIVATED;
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
/**
|
|
* @brief Control the serial device.
|
|
* @param dev The pointer of device driver structure
|
|
* @param cmd The command value that controls the serial device
|
|
* @param args The parameter value that controls the serial device
|
|
* @return Return the status of the operation.
|
|
*/
|
|
static rt_err_t rt_serial_control(struct rt_device *dev,
|
|
int cmd,
|
|
void *args)
|
|
{
|
|
rt_err_t ret = RT_EOK;
|
|
struct rt_serial_device *serial;
|
|
|
|
RT_ASSERT(dev != RT_NULL);
|
|
serial = (struct rt_serial_device *)dev;
|
|
|
|
switch (cmd)
|
|
{
|
|
case RT_DEVICE_CTRL_SUSPEND:
|
|
/* suspend device */
|
|
dev->flag |= RT_DEVICE_FLAG_SUSPENDED;
|
|
break;
|
|
|
|
case RT_DEVICE_CTRL_RESUME:
|
|
/* resume device */
|
|
dev->flag &= ~RT_DEVICE_FLAG_SUSPENDED;
|
|
break;
|
|
|
|
case RT_DEVICE_CTRL_CONFIG:
|
|
if (args != RT_NULL)
|
|
{
|
|
struct serial_configure *pconfig = (struct serial_configure *) args;
|
|
if (serial->parent.ref_count)
|
|
{
|
|
/*can not change buffer size*/
|
|
return -RT_EBUSY;
|
|
}
|
|
/* set serial configure */
|
|
serial->config = *pconfig;
|
|
serial->ops->configure(serial,
|
|
(struct serial_configure *) args);
|
|
}
|
|
|
|
break;
|
|
|
|
default :
|
|
/* control device */
|
|
ret = serial->ops->control(serial, cmd, args);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef RT_USING_DEVICE_OPS
|
|
static rt_size_t rt_serial_read(struct rt_device *dev,
|
|
rt_off_t pos,
|
|
void *buffer,
|
|
rt_size_t size)
|
|
{
|
|
struct rt_serial_device *serial;
|
|
|
|
RT_ASSERT(dev != RT_NULL);
|
|
if (size == 0) return 0;
|
|
|
|
serial = (struct rt_serial_device *)dev;
|
|
|
|
if (serial->config.rx_bufsz)
|
|
{
|
|
return _serial_fifo_rx(dev, pos, buffer, size);
|
|
}
|
|
|
|
return _serial_poll_rx(dev, pos, buffer, size);
|
|
}
|
|
|
|
|
|
static rt_size_t rt_serial_write(struct rt_device *dev,
|
|
rt_off_t pos,
|
|
const void *buffer,
|
|
rt_size_t size)
|
|
{
|
|
struct rt_serial_device *serial;
|
|
struct rt_serial_tx_fifo *tx_fifo;
|
|
|
|
RT_ASSERT(dev != RT_NULL);
|
|
if (size == 0) return 0;
|
|
|
|
serial = (struct rt_serial_device *)dev;
|
|
RT_ASSERT((serial != RT_NULL) && (buffer != RT_NULL));
|
|
tx_fifo = (struct rt_serial_tx_fifo *) serial->serial_tx;
|
|
|
|
if (serial->config.tx_bufsz == 0)
|
|
{
|
|
return _serial_poll_tx(dev, pos, buffer, size);
|
|
}
|
|
|
|
if (dev->open_flag | RT_SERIAL_TX_BLOCKING)
|
|
{
|
|
if ((tx_fifo->rb.buffer_ptr) == RT_NULL)
|
|
{
|
|
return _serial_fifo_tx_blocking_nbuf(dev, pos, buffer, size);
|
|
}
|
|
|
|
return _serial_fifo_tx_blocking_buf(dev, pos, buffer, size);
|
|
}
|
|
|
|
return _serial_fifo_tx_nonblocking(dev, pos, buffer, size);
|
|
}
|
|
|
|
const static struct rt_device_ops serial_ops =
|
|
{
|
|
rt_serial_init,
|
|
rt_serial_open,
|
|
rt_serial_close,
|
|
rt_serial_read,
|
|
rt_serial_write,
|
|
rt_serial_control
|
|
};
|
|
#endif
|
|
|
|
/**
|
|
* @brief Register the serial device.
|
|
* @param serial RT-thread serial device.
|
|
* @param name The device driver's name
|
|
* @param flag The capabilities flag of device.
|
|
* @param data The device driver's data.
|
|
* @return Return the status of the operation.
|
|
*/
|
|
rt_err_t rt_hw_serial_register(struct rt_serial_device *serial,
|
|
const char *name,
|
|
rt_uint32_t flag,
|
|
void *data)
|
|
{
|
|
rt_err_t ret;
|
|
struct rt_device *device;
|
|
RT_ASSERT(serial != RT_NULL);
|
|
|
|
device = &(serial->parent);
|
|
|
|
device->type = RT_Device_Class_Char;
|
|
device->rx_indicate = RT_NULL;
|
|
device->tx_complete = RT_NULL;
|
|
|
|
#ifdef RT_USING_DEVICE_OPS
|
|
device->ops = &serial_ops;
|
|
#else
|
|
device->init = rt_serial_init;
|
|
device->open = rt_serial_open;
|
|
device->close = rt_serial_close;
|
|
device->read = RT_NULL;
|
|
device->write = RT_NULL;
|
|
device->control = rt_serial_control;
|
|
#endif
|
|
device->user_data = data;
|
|
|
|
/* register a character device */
|
|
ret = rt_device_register(device, name, flag);
|
|
|
|
#ifdef RT_USING_POSIX_STDIO
|
|
/* set fops */
|
|
device->fops = &_serial_fops;
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* @brief ISR for serial interrupt
|
|
* @param serial RT-thread serial device.
|
|
* @param event ISR event type.
|
|
*/
|
|
void rt_hw_serial_isr(struct rt_serial_device *serial, int event)
|
|
{
|
|
RT_ASSERT(serial != RT_NULL);
|
|
|
|
switch (event & 0xff)
|
|
{
|
|
/* Interrupt receive event */
|
|
case RT_SERIAL_EVENT_RX_IND:
|
|
case RT_SERIAL_EVENT_RX_DMADONE:
|
|
{
|
|
struct rt_serial_rx_fifo *rx_fifo;
|
|
rt_size_t rx_length = 0;
|
|
rx_fifo = (struct rt_serial_rx_fifo *)serial->serial_rx;
|
|
RT_ASSERT(rx_fifo != RT_NULL);
|
|
|
|
/* If the event is RT_SERIAL_EVENT_RX_IND, rx_length is equal to 0 */
|
|
rx_length = (event & (~0xff)) >> 8;
|
|
|
|
if (rx_length)
|
|
rt_serial_update_write_index(&(rx_fifo->rb), rx_length);
|
|
|
|
/* Get the length of the data from the ringbuffer */
|
|
rx_length = rt_ringbuffer_data_len(&rx_fifo->rb);
|
|
if (rx_length == 0) break;
|
|
|
|
if (serial->parent.open_flag & RT_SERIAL_RX_BLOCKING)
|
|
{
|
|
if (rx_fifo->rx_cpt_index && rx_length >= rx_fifo->rx_cpt_index )
|
|
{
|
|
rx_fifo->rx_cpt_index = 0;
|
|
rt_completion_done(&(rx_fifo->rx_cpt));
|
|
}
|
|
}
|
|
/* Trigger the receiving completion callback */
|
|
if (serial->parent.rx_indicate != RT_NULL)
|
|
serial->parent.rx_indicate(&(serial->parent), rx_length);
|
|
break;
|
|
}
|
|
|
|
/* Interrupt transmit event */
|
|
case RT_SERIAL_EVENT_TX_DONE:
|
|
{
|
|
struct rt_serial_tx_fifo *tx_fifo;
|
|
rt_size_t tx_length = 0;
|
|
tx_fifo = (struct rt_serial_tx_fifo *)serial->serial_tx;
|
|
RT_ASSERT(tx_fifo != RT_NULL);
|
|
|
|
/* Get the length of the data from the ringbuffer */
|
|
tx_length = rt_ringbuffer_data_len(&tx_fifo->rb);
|
|
/* If there is no data in tx_ringbuffer,
|
|
* then the transmit completion callback is triggered*/
|
|
if (tx_length == 0)
|
|
{
|
|
tx_fifo->activated = RT_FALSE;
|
|
/* Trigger the transmit completion callback */
|
|
if (serial->parent.tx_complete != RT_NULL)
|
|
serial->parent.tx_complete(&serial->parent, RT_NULL);
|
|
|
|
if (serial->parent.open_flag & RT_SERIAL_TX_BLOCKING)
|
|
rt_completion_done(&(tx_fifo->tx_cpt));
|
|
|
|
break;
|
|
}
|
|
|
|
/* Call the transmit interface for transmission again */
|
|
/* Note that in interrupt mode, tx_fifo->buffer and tx_length
|
|
* are inactive parameters */
|
|
serial->ops->transmit(serial,
|
|
tx_fifo->buffer,
|
|
tx_length,
|
|
serial->parent.open_flag & ( \
|
|
RT_SERIAL_TX_BLOCKING | \
|
|
RT_SERIAL_TX_NON_BLOCKING));
|
|
break;
|
|
}
|
|
|
|
case RT_SERIAL_EVENT_TX_DMADONE:
|
|
{
|
|
struct rt_serial_tx_fifo *tx_fifo;
|
|
tx_fifo = (struct rt_serial_tx_fifo *)serial->serial_tx;
|
|
RT_ASSERT(tx_fifo != RT_NULL);
|
|
|
|
tx_fifo->activated = RT_FALSE;
|
|
|
|
/* Trigger the transmit completion callback */
|
|
if (serial->parent.tx_complete != RT_NULL)
|
|
serial->parent.tx_complete(&serial->parent, RT_NULL);
|
|
|
|
if (serial->parent.open_flag & RT_SERIAL_TX_BLOCKING)
|
|
{
|
|
rt_completion_done(&(tx_fifo->tx_cpt));
|
|
break;
|
|
}
|
|
|
|
rt_serial_update_read_index(&tx_fifo->rb, tx_fifo->put_size);
|
|
/* Get the length of the data from the ringbuffer.
|
|
* If there is some data in tx_ringbuffer,
|
|
* then call the transmit interface for transmission again */
|
|
if (rt_ringbuffer_data_len(&tx_fifo->rb))
|
|
{
|
|
tx_fifo->activated = RT_TRUE;
|
|
|
|
rt_uint8_t *put_ptr = RT_NULL;
|
|
/* Get the linear length buffer from rinbuffer */
|
|
tx_fifo->put_size = rt_serial_get_linear_buffer(&(tx_fifo->rb), &put_ptr);
|
|
/* Call the transmit interface for transmission again */
|
|
serial->ops->transmit(serial,
|
|
put_ptr,
|
|
tx_fifo->put_size,
|
|
RT_SERIAL_TX_NON_BLOCKING);
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|