122 lines
2.7 KiB
C
122 lines
2.7 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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* 2020-12-10 thread-liu first version
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*/
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#include <board.h>
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#if defined(BSP_UART3_RX_USING_DMA) || defined(BSP_USING_UART3)
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#include <rtthread.h>
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#define SAMPLE_UART_NAME "uart3" /* serial device name */
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struct rx_msg
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{
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rt_device_t dev;
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rt_size_t size;
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};
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static rt_device_t serial;
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static struct rt_messagequeue rx_mq;
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static rt_err_t uart_input(rt_device_t dev, rt_size_t size)
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{
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struct rx_msg msg;
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rt_err_t result;
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msg.dev = dev;
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msg.size = size;
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result = rt_mq_send(&rx_mq, &msg, sizeof(msg));
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if ( result == -RT_EFULL)
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{
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rt_kprintf("message queue full!\n");
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}
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return result;
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}
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static void serial_thread_entry(void *parameter)
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{
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struct rx_msg msg;
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rt_err_t result;
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rt_uint32_t rx_length;
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static char rx_buffer[RT_SERIAL_RB_BUFSZ + 1];
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while (1)
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{
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rt_memset(&msg, 0, sizeof(msg));
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result = rt_mq_recv(&rx_mq, &msg, sizeof(msg), RT_WAITING_FOREVER);
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if (result == RT_EOK)
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{
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rx_length = rt_device_read(msg.dev, 0, rx_buffer, msg.size);
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rx_buffer[rx_length] = '\0';
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rt_device_write(serial, 0, rx_buffer, rx_length);
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}
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}
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}
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static int uart_dma_sample(int argc, char *argv[])
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{
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rt_err_t ret = RT_EOK;
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char uart_name[RT_NAME_MAX];
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static char msg_pool[256];
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char str[] = "hello RT-Thread!\r\n";
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if (argc == 2)
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{
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rt_strncpy(uart_name, argv[1], RT_NAME_MAX);
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}
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else
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{
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rt_strncpy(uart_name, SAMPLE_UART_NAME, RT_NAME_MAX);
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}
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serial = rt_device_find(uart_name);
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if (!serial)
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{
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rt_kprintf("find %s failed!\n", uart_name);
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return -RT_ERROR;
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}
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rt_mq_init(&rx_mq, "rx_mq",
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msg_pool,
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sizeof(struct rx_msg),
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sizeof(msg_pool),
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RT_IPC_FLAG_FIFO);
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ret = rt_device_open(serial, RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_DMA_RX);
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if (ret != RT_EOK)
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{
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rt_kprintf("serial device open fail!.\n");
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return -RT_ERROR;
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}
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ret = rt_device_set_rx_indicate(serial, uart_input);
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if (ret != RT_EOK)
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{
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rt_kprintf("set rx indicate fail!.\n");
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return -RT_ERROR;
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}
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rt_device_write(serial, 0, str, (sizeof(str) - 1));
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rt_thread_t thread = rt_thread_create("serial", serial_thread_entry, RT_NULL, 1024, 25, 10);
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if (thread != RT_NULL)
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{
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rt_thread_startup(thread);
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}
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else
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{
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ret = -RT_ERROR;
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}
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return ret;
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}
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MSH_CMD_EXPORT(uart_dma_sample, uart device dma sample);
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#endif /* BSP_USING_DMA */
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