269 lines
6.7 KiB
C
269 lines
6.7 KiB
C
/*
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* File : drv_uart.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2017, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2017-05-30 Bernard the first version
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* 2018-03-15 flyingcys add amebaz
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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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#include "board.h"
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#include "drv_uart.h"
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struct device_uart
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{
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serial_t serial;
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rt_uint32_t irqno;
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};
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#ifdef BSP_USING_UART0
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static struct rt_serial_device serial0;
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static struct device_uart uart0;
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#endif
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static rt_err_t ameba_uart_configure (struct rt_serial_device *serial, struct serial_configure *cfg);
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static rt_err_t ameba_uart_control (struct rt_serial_device *serial, int cmd, void *arg);
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static int ameba_uart_putc (struct rt_serial_device *serial, char c);
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static int ameba_uart_getc (struct rt_serial_device *serial);
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static rt_size_t ameba_uart_dma_transmit (struct rt_serial_device *serial, rt_uint8_t *buf, rt_size_t size, int direction);
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static void ameba_uart_irq(uint32_t id, SerialIrq event);
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const struct rt_uart_ops _uart_ops =
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{
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ameba_uart_configure,
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ameba_uart_control,
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ameba_uart_putc,
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ameba_uart_getc,
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ameba_uart_dma_transmit
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};
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/*
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* UART interface
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*/
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static rt_err_t ameba_uart_configure (struct rt_serial_device *serial, struct serial_configure *cfg)
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{
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rt_uint32_t baud_div;
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struct device_uart * uart;
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RT_ASSERT(serial != RT_NULL);
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serial->config = *cfg;
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uart = serial->parent.user_data;
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RT_ASSERT(uart != RT_NULL);
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/* Set databits, stopbits and parity. (8-bit data, 1 stopbit, no parity) */
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serial_format(&uart->serial, 8, ParityNone, 1);
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/* set baudrate */
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serial_baud(&uart->serial, 115200);
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return (RT_EOK);
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}
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static rt_err_t ameba_uart_control (struct rt_serial_device *serial, int cmd, void *arg)
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{
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struct device_uart * uart;
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uart = serial->parent.user_data;
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RT_ASSERT(uart != RT_NULL);
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switch (cmd)
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{
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case RT_DEVICE_CTRL_CLR_INT:
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/* Disable the UART Interrupt */
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serial_irq_set(&uart->serial, RxIrq, 0);
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serial_irq_handler(&uart->serial, RT_NULL, 0);
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break;
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case RT_DEVICE_CTRL_SET_INT:
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/* install interrupt */
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serial_irq_handler(&uart->serial, ameba_uart_irq, (uint32_t)serial);
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/* Enable the UART Interrupt */
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serial_irq_set(&uart->serial, RxIrq, 1);
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break;
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}
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return (RT_EOK);
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}
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static int ameba_uart_putc (struct rt_serial_device *serial, char c)
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{
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struct device_uart* uart;
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uart = serial->parent.user_data;
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/* FIFO status, contain valid data */
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/* write data */
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serial_putc(&uart->serial, c);
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return (1);
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}
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static int ameba_uart_getc (struct rt_serial_device *serial)
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{
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struct device_uart* uart = serial->parent.user_data;
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if(!serial_readable(&uart->serial))
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return -1;
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/* Receive Data Available */
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return serial_getc(&uart->serial);
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}
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static rt_size_t ameba_uart_dma_transmit (struct rt_serial_device *serial, rt_uint8_t *buf, rt_size_t size, int direction)
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{
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return (0);
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}
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static void ameba_uart_irq(uint32_t id, SerialIrq event)
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{
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struct rt_serial_device *serial = (struct rt_serial_device *)id;
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if(event == RxIrq)
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{
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rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
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}
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else if(event == TxIrq)
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{
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}
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}
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static rt_err_t dbg_configure(struct rt_serial_device *serial, struct serial_configure *cfg);
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static rt_err_t dbg_control(struct rt_serial_device *serial, int cmd, void *arg);
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static int dbg_putc(struct rt_serial_device *serial, char c);
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static int dbg_getc(struct rt_serial_device *serial);
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static struct rt_serial_device ameba_dbg_serial;
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const struct rt_uart_ops _ambed_dbg_ops =
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{
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dbg_configure,
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dbg_control,
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dbg_putc,
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dbg_getc,
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RT_NULL,
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};
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static rt_err_t dbg_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
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{
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LOGUART_SetBaud(115200);
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return RT_EOK;
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}
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void dbg_uart_irq_handler(void * data)
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{
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u32 IrqEn = DiagGetIsrEnReg();
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DiagSetIsrEnReg(0);
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rt_hw_serial_isr(&ameba_dbg_serial, RT_SERIAL_EVENT_RX_IND);
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DiagSetIsrEnReg(IrqEn);
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}
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static rt_err_t dbg_control(struct rt_serial_device *serial, int cmd, void *arg)
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{
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switch (cmd)
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{
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case RT_DEVICE_CTRL_CLR_INT:
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/* Disable the UART Interrupt */
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NVIC_DisableIRQ(UART_LOG_IRQ); /* this is rom_code_patch */
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break;
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case RT_DEVICE_CTRL_SET_INT:
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/* install interrupt */
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DIAG_UartReInit((IRQ_FUN) dbg_uart_irq_handler);
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/* Enable the UART Interrupt */
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NVIC_SetPriority(UART_LOG_IRQ, 10); /* this is rom_code_patch */
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break;
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}
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return (RT_EOK);
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}
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static int dbg_putc(struct rt_serial_device *serial, char c)
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{
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DiagPutChar(c);
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return 1;
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};
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static int dbg_getc(struct rt_serial_device *serial)
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{
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int c = -1;
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if(!UART_Readable(UART2_DEV))
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return -1;
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c = DiagGetChar(_FALSE);
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return c;
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}
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/*
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* UART Initiation
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*/
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int rt_hw_uart_init(void)
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{
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struct rt_serial_device *serial;
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struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
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#ifdef BSP_USING_UART0
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{
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struct device_uart *uart;
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serial = &serial0;
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uart = &uart0;
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/* Init UART Hardware */
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serial_init(&uart->serial, UART_TX, UART_RX);
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serial->ops = &_uart_ops;
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serial->config = config;
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serial->config.baud_rate = 115200;
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uart->irqno = UART0_IRQ;
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rt_hw_serial_register(serial,
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"uart0",
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
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uart);
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}
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#endif
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{
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serial = &ameba_dbg_serial;
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serial->ops = &_ambed_dbg_ops;
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serial->config = config;
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rt_hw_serial_register(serial,
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RT_CONSOLE_DEVICE_NAME,
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
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RT_NULL);
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}
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return 0;
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}
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