639 lines
17 KiB
C
639 lines
17 KiB
C
/*
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* Copyright (c) 2006-2018, 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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* 2009-01-05 Bernard the first version
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* 2010-03-29 Bernard remove interrupt Tx and DMA Rx mode
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* 2013-05-13 aozima update for kehong-lingtai.
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* 2015-01-31 armink make sure the serial transmit complete in putc()
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* 2016-05-13 armink add DMA Rx mode
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* 2017-01-19 aubr.cool add interrupt Tx mode
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* 2017-04-13 aubr.cool correct Rx parity err
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*/
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#include "stm32f10x.h"
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#include "usart.h"
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#include "board.h"
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#include <rtdevice.h>
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/* USART1 */
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#define UART1_GPIO_TX GPIO_Pin_9
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#define UART1_GPIO_RX GPIO_Pin_10
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#define UART1_GPIO GPIOA
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/* USART2 */
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#define UART2_GPIO_TX GPIO_Pin_2
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#define UART2_GPIO_RX GPIO_Pin_3
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#define UART2_GPIO GPIOA
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/* USART3_REMAP[1:0] = 00 */
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#define UART3_GPIO_TX GPIO_Pin_10
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#define UART3_GPIO_RX GPIO_Pin_11
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#define UART3_GPIO GPIOB
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/* USART4 */
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#define UART4_GPIO_TX GPIO_Pin_10
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#define UART4_GPIO_RX GPIO_Pin_11
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#define UART4_GPIO GPIOC
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/* STM32 uart driver */
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struct stm32_uart
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{
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USART_TypeDef *uart_device;
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IRQn_Type irq;
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struct stm32_uart_dma
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{
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/* dma channel */
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DMA_Channel_TypeDef *rx_ch;
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/* dma global flag */
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uint32_t rx_gl_flag;
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/* dma irq channel */
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uint8_t rx_irq_ch;
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/* setting receive len */
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rt_size_t setting_recv_len;
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/* last receive index */
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rt_size_t last_recv_index;
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} dma;
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};
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static void DMA_Configuration(struct rt_serial_device *serial);
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static rt_err_t stm32_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
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{
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struct stm32_uart* uart;
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USART_InitTypeDef USART_InitStructure;
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RT_ASSERT(serial != RT_NULL);
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RT_ASSERT(cfg != RT_NULL);
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uart = (struct stm32_uart *)serial->parent.user_data;
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USART_InitStructure.USART_BaudRate = cfg->baud_rate;
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if (cfg->data_bits == DATA_BITS_8){
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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} else if (cfg->data_bits == DATA_BITS_9) {
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USART_InitStructure.USART_WordLength = USART_WordLength_9b;
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}
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if (cfg->stop_bits == STOP_BITS_1){
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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} else if (cfg->stop_bits == STOP_BITS_2){
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USART_InitStructure.USART_StopBits = USART_StopBits_2;
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}
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if (cfg->parity == PARITY_NONE){
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USART_InitStructure.USART_Parity = USART_Parity_No;
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} else if (cfg->parity == PARITY_ODD) {
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USART_InitStructure.USART_Parity = USART_Parity_Odd;
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} else if (cfg->parity == PARITY_EVEN) {
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USART_InitStructure.USART_Parity = USART_Parity_Even;
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}
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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USART_Init(uart->uart_device, &USART_InitStructure);
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/* Enable USART */
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USART_Cmd(uart->uart_device, ENABLE);
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return RT_EOK;
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}
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static rt_err_t stm32_control(struct rt_serial_device *serial, int cmd, void *arg)
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{
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struct stm32_uart* uart;
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rt_uint32_t ctrl_arg = (rt_uint32_t)(arg);
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RT_ASSERT(serial != RT_NULL);
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uart = (struct stm32_uart *)serial->parent.user_data;
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switch (cmd)
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{
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/* disable interrupt */
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case RT_DEVICE_CTRL_CLR_INT:
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/* disable rx irq */
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UART_DISABLE_IRQ(uart->irq);
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/* disable interrupt */
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USART_ITConfig(uart->uart_device, USART_IT_RXNE, DISABLE);
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break;
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/* enable interrupt */
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case RT_DEVICE_CTRL_SET_INT:
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/* enable rx irq */
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UART_ENABLE_IRQ(uart->irq);
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/* enable interrupt */
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USART_ITConfig(uart->uart_device, USART_IT_RXNE, ENABLE);
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break;
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/* USART config */
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case RT_DEVICE_CTRL_CONFIG :
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if (ctrl_arg == RT_DEVICE_FLAG_DMA_RX) {
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DMA_Configuration(serial);
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}
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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 stm32_putc(struct rt_serial_device *serial, char c)
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{
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struct stm32_uart* uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct stm32_uart *)serial->parent.user_data;
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if (serial->parent.open_flag & RT_DEVICE_FLAG_INT_TX)
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{
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if (!(uart->uart_device->SR & USART_FLAG_TXE))
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{
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USART_ITConfig(uart->uart_device, USART_IT_TC, ENABLE);
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return -1;
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}
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uart->uart_device->DR = c;
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USART_ITConfig(uart->uart_device, USART_IT_TC, ENABLE);
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}
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else
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{
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uart->uart_device->DR = c;
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while (!(uart->uart_device->SR & USART_FLAG_TC));
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}
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return 1;
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}
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static int stm32_getc(struct rt_serial_device *serial)
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{
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int ch;
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struct stm32_uart* uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct stm32_uart *)serial->parent.user_data;
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ch = -1;
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if (uart->uart_device->SR & USART_FLAG_RXNE)
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{
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ch = uart->uart_device->DR & 0xff;
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}
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return ch;
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}
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/**
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* Serial port receive idle process. This need add to uart idle ISR.
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*
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* @param serial serial device
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*/
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static void dma_uart_rx_idle_isr(struct rt_serial_device *serial) {
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struct stm32_uart *uart = (struct stm32_uart *) serial->parent.user_data;
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rt_size_t recv_total_index, recv_len;
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rt_base_t level;
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/* disable interrupt */
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level = rt_hw_interrupt_disable();
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recv_total_index = uart->dma.setting_recv_len - DMA_GetCurrDataCounter(uart->dma.rx_ch);
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recv_len = recv_total_index - uart->dma.last_recv_index;
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uart->dma.last_recv_index = recv_total_index;
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/* enable interrupt */
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rt_hw_interrupt_enable(level);
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if (recv_len) rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_DMADONE | (recv_len << 8));
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/* read a data for clear receive idle interrupt flag */
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USART_ReceiveData(uart->uart_device);
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DMA_ClearFlag(uart->dma.rx_gl_flag);
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}
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/**
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* DMA receive done process. This need add to DMA receive done ISR.
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*
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* @param serial serial device
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*/
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static void dma_rx_done_isr(struct rt_serial_device *serial) {
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struct stm32_uart *uart = (struct stm32_uart *) serial->parent.user_data;
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rt_size_t recv_len;
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rt_base_t level;
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/* disable interrupt */
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level = rt_hw_interrupt_disable();
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recv_len = uart->dma.setting_recv_len - uart->dma.last_recv_index;
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/* reset last recv index */
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uart->dma.last_recv_index = 0;
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/* enable interrupt */
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rt_hw_interrupt_enable(level);
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if (recv_len) rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_DMADONE | (recv_len << 8));
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DMA_ClearFlag(uart->dma.rx_gl_flag);
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}
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/**
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* Uart common interrupt process. This need add to uart ISR.
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*
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* @param serial serial device
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*/
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static void uart_isr(struct rt_serial_device *serial) {
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struct stm32_uart *uart = (struct stm32_uart *) serial->parent.user_data;
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RT_ASSERT(uart != RT_NULL);
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if(USART_GetITStatus(uart->uart_device, USART_IT_RXNE) != RESET)
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{
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if(USART_GetFlagStatus(uart->uart_device, USART_FLAG_PE) == RESET)
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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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/* clear interrupt */
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USART_ClearITPendingBit(uart->uart_device, USART_IT_RXNE);
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}
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if(USART_GetITStatus(uart->uart_device, USART_IT_IDLE) != RESET)
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{
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dma_uart_rx_idle_isr(serial);
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}
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if (USART_GetITStatus(uart->uart_device, USART_IT_TC) != RESET)
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{
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/* clear interrupt */
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if(serial->parent.open_flag & RT_DEVICE_FLAG_INT_TX)
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{
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rt_hw_serial_isr(serial, RT_SERIAL_EVENT_TX_DONE);
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}
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USART_ITConfig(uart->uart_device, USART_IT_TC, DISABLE);
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USART_ClearITPendingBit(uart->uart_device, USART_IT_TC);
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}
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if (USART_GetFlagStatus(uart->uart_device, USART_FLAG_ORE) == SET)
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{
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USART_ReceiveData(uart->uart_device);
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}
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}
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static const struct rt_uart_ops stm32_uart_ops =
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{
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stm32_configure,
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stm32_control,
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stm32_putc,
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stm32_getc,
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};
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#if defined(RT_USING_UART1)
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/* UART1 device driver structure */
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struct stm32_uart uart1 =
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{
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USART1,
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USART1_IRQn,
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{
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DMA1_Channel5,
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DMA1_FLAG_GL5,
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DMA1_Channel5_IRQn,
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0,
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},
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};
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struct rt_serial_device serial1;
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void USART1_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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uart_isr(&serial1);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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void DMA1_Channel5_IRQHandler(void) {
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/* enter interrupt */
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rt_interrupt_enter();
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dma_rx_done_isr(&serial1);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif /* RT_USING_UART1 */
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#if defined(RT_USING_UART2)
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/* UART2 device driver structure */
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struct stm32_uart uart2 =
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{
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USART2,
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USART2_IRQn,
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{
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DMA1_Channel6,
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DMA1_FLAG_GL6,
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DMA1_Channel6_IRQn,
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0,
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},
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};
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struct rt_serial_device serial2;
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void USART2_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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uart_isr(&serial2);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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void DMA1_Channel6_IRQHandler(void) {
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/* enter interrupt */
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rt_interrupt_enter();
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dma_rx_done_isr(&serial2);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif /* RT_USING_UART2 */
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#if defined(RT_USING_UART3)
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/* UART3 device driver structure */
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struct stm32_uart uart3 =
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{
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USART3,
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USART3_IRQn,
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{
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DMA1_Channel3,
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DMA1_FLAG_GL3,
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DMA1_Channel3_IRQn,
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0,
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},
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};
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struct rt_serial_device serial3;
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void USART3_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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uart_isr(&serial3);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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void DMA1_Channel3_IRQHandler(void) {
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/* enter interrupt */
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rt_interrupt_enter();
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dma_rx_done_isr(&serial3);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif /* RT_USING_UART3 */
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#if defined(RT_USING_UART4)
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/* UART4 device driver structure */
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struct stm32_uart uart4 =
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{
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UART4,
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UART4_IRQn,
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{
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DMA2_Channel3,
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DMA2_FLAG_GL3,
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DMA2_Channel3_IRQn,
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0,
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},
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};
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struct rt_serial_device serial4;
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void UART4_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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uart_isr(&serial4);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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void DMA2_Channel3_IRQHandler(void) {
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/* enter interrupt */
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rt_interrupt_enter();
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dma_rx_done_isr(&serial4);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif /* RT_USING_UART4 */
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static void RCC_Configuration(void)
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{
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#if defined(RT_USING_UART1)
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/* Enable UART GPIO clocks */
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
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/* Enable UART clock */
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
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#endif /* RT_USING_UART1 */
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#if defined(RT_USING_UART2)
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/* Enable UART GPIO clocks */
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
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/* Enable UART clock */
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
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#endif /* RT_USING_UART2 */
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#if defined(RT_USING_UART3)
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/* Enable UART GPIO clocks */
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
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/* Enable UART clock */
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
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#endif /* RT_USING_UART3 */
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#if defined(RT_USING_UART4)
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/* Enable UART GPIO clocks */
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE);
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/* Enable UART clock */
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE);
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#endif /* RT_USING_UART4 */
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}
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static void GPIO_Configuration(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
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#if defined(RT_USING_UART1)
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/* Configure USART Rx/tx PIN */
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_InitStructure.GPIO_Pin = UART1_GPIO_RX;
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GPIO_Init(UART1_GPIO, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_InitStructure.GPIO_Pin = UART1_GPIO_TX;
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GPIO_Init(UART1_GPIO, &GPIO_InitStructure);
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#endif /* RT_USING_UART1 */
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#if defined(RT_USING_UART2)
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/* Configure USART Rx/tx PIN */
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_InitStructure.GPIO_Pin = UART2_GPIO_RX;
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GPIO_Init(UART2_GPIO, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_InitStructure.GPIO_Pin = UART2_GPIO_TX;
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GPIO_Init(UART2_GPIO, &GPIO_InitStructure);
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#endif /* RT_USING_UART2 */
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#if defined(RT_USING_UART3)
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/* Configure USART Rx/tx PIN */
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_InitStructure.GPIO_Pin = UART3_GPIO_RX;
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GPIO_Init(UART3_GPIO, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_InitStructure.GPIO_Pin = UART3_GPIO_TX;
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GPIO_Init(UART3_GPIO, &GPIO_InitStructure);
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#endif /* RT_USING_UART3 */
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#if defined(RT_USING_UART4)
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/* Configure USART Rx/tx PIN */
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_InitStructure.GPIO_Pin = UART4_GPIO_RX;
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GPIO_Init(UART4_GPIO, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_InitStructure.GPIO_Pin = UART4_GPIO_TX;
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GPIO_Init(UART4_GPIO, &GPIO_InitStructure);
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#endif /* RT_USING_UART4 */
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}
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static void NVIC_Configuration(struct stm32_uart* uart)
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{
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NVIC_InitTypeDef NVIC_InitStructure;
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/* Enable the USART1 Interrupt */
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NVIC_InitStructure.NVIC_IRQChannel = uart->irq;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
|
|
NVIC_Init(&NVIC_InitStructure);
|
|
}
|
|
|
|
static void DMA_Configuration(struct rt_serial_device *serial) {
|
|
struct stm32_uart *uart = (struct stm32_uart *) serial->parent.user_data;
|
|
struct rt_serial_rx_fifo *rx_fifo = (struct rt_serial_rx_fifo *)serial->serial_rx;
|
|
DMA_InitTypeDef DMA_InitStructure;
|
|
NVIC_InitTypeDef NVIC_InitStructure;
|
|
|
|
uart->dma.setting_recv_len = serial->config.bufsz;
|
|
|
|
/* enable transmit idle interrupt */
|
|
USART_ITConfig(uart->uart_device, USART_IT_IDLE , ENABLE);
|
|
|
|
/* DMA clock enable */
|
|
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
|
|
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);
|
|
|
|
/* rx dma config */
|
|
DMA_DeInit(uart->dma.rx_ch);
|
|
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(uart->uart_device->DR);
|
|
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) rx_fifo->buffer;
|
|
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
|
|
DMA_InitStructure.DMA_BufferSize = serial->config.bufsz;
|
|
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
|
|
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
|
|
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
|
|
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
|
|
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
|
|
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
|
|
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
|
|
DMA_Init(uart->dma.rx_ch, &DMA_InitStructure);
|
|
DMA_ClearFlag(uart->dma.rx_gl_flag);
|
|
DMA_ITConfig(uart->dma.rx_ch, DMA_IT_TC, ENABLE);
|
|
USART_DMACmd(uart->uart_device, USART_DMAReq_Rx, ENABLE);
|
|
DMA_Cmd(uart->dma.rx_ch, ENABLE);
|
|
|
|
/* rx dma interrupt config */
|
|
NVIC_InitStructure.NVIC_IRQChannel = uart->dma.rx_irq_ch;
|
|
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
|
|
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
|
|
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
|
|
NVIC_Init(&NVIC_InitStructure);
|
|
}
|
|
|
|
void rt_hw_usart_init(void)
|
|
{
|
|
struct stm32_uart* uart;
|
|
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
|
|
|
|
RCC_Configuration();
|
|
GPIO_Configuration();
|
|
|
|
#if defined(RT_USING_UART1)
|
|
uart = &uart1;
|
|
config.baud_rate = BAUD_RATE_115200;
|
|
|
|
serial1.ops = &stm32_uart_ops;
|
|
serial1.config = config;
|
|
|
|
NVIC_Configuration(uart);
|
|
|
|
/* register UART1 device */
|
|
rt_hw_serial_register(&serial1, "uart1",
|
|
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX |
|
|
RT_DEVICE_FLAG_INT_TX | RT_DEVICE_FLAG_DMA_RX,
|
|
uart);
|
|
#endif /* RT_USING_UART1 */
|
|
|
|
#if defined(RT_USING_UART2)
|
|
uart = &uart2;
|
|
|
|
config.baud_rate = BAUD_RATE_115200;
|
|
serial2.ops = &stm32_uart_ops;
|
|
serial2.config = config;
|
|
|
|
NVIC_Configuration(uart);
|
|
|
|
/* register UART2 device */
|
|
rt_hw_serial_register(&serial2, "uart2",
|
|
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX |
|
|
RT_DEVICE_FLAG_INT_TX | RT_DEVICE_FLAG_DMA_RX,
|
|
uart);
|
|
#endif /* RT_USING_UART2 */
|
|
|
|
#if defined(RT_USING_UART3)
|
|
uart = &uart3;
|
|
|
|
config.baud_rate = BAUD_RATE_115200;
|
|
|
|
serial3.ops = &stm32_uart_ops;
|
|
serial3.config = config;
|
|
|
|
NVIC_Configuration(uart);
|
|
|
|
/* register UART3 device */
|
|
rt_hw_serial_register(&serial3, "uart3",
|
|
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX |
|
|
RT_DEVICE_FLAG_INT_TX | RT_DEVICE_FLAG_DMA_RX,
|
|
uart);
|
|
#endif /* RT_USING_UART3 */
|
|
|
|
#if defined(RT_USING_UART4)
|
|
uart = &uart4;
|
|
|
|
config.baud_rate = BAUD_RATE_115200;
|
|
|
|
serial4.ops = &stm32_uart_ops;
|
|
serial4.config = config;
|
|
|
|
NVIC_Configuration(uart);
|
|
|
|
/* register UART4 device */
|
|
rt_hw_serial_register(&serial4, "uart4",
|
|
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX |
|
|
RT_DEVICE_FLAG_INT_TX | RT_DEVICE_FLAG_DMA_RX,
|
|
uart);
|
|
#endif /* RT_USING_UART4 */
|
|
}
|