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qiyongshuang
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/*
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* File : drv_usart.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006-2013, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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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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* 2017-10-20 ZYH porting to HAL Libraries(with out DMA)
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* 2017-11-15 ZYH update to 3.0.0
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*/
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#include "board.h"
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#include <rtdevice.h>
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#include <drv_usart.h>
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/* uart driver */
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struct ch32_uart
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{
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USART_InitTypeDef huart;
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USART_TypeDef *USARTx;
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IRQn_Type irq;
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};
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static rt_err_t ch32_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
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{
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struct ch32_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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RT_ASSERT(cfg != RT_NULL);
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uart = (struct ch32_uart *)serial->parent.user_data;
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uart->huart.USART_BaudRate = cfg->baud_rate;
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uart->huart.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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uart->huart.USART_Mode = USART_Mode_Rx|USART_Mode_Tx;
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switch (cfg->data_bits)
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{
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case DATA_BITS_8:
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uart->huart.USART_WordLength = USART_WordLength_8b;
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break;
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case DATA_BITS_9:
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uart->huart.USART_WordLength = USART_WordLength_9b;
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break;
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default:
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uart->huart.USART_WordLength = USART_WordLength_8b;
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break;
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}
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switch (cfg->stop_bits)
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{
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case STOP_BITS_1:
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uart->huart.USART_StopBits = USART_StopBits_1;
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break;
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case STOP_BITS_2:
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uart->huart.USART_StopBits = USART_StopBits_2;
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break;
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default:
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uart->huart.USART_StopBits = USART_StopBits_1;
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break;
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}
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switch (cfg->parity)
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{
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case PARITY_NONE:
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uart->huart.USART_Parity = USART_Parity_No;
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break;
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case PARITY_ODD:
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uart->huart.USART_Parity = USART_Parity_Odd;
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break;
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case PARITY_EVEN:
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uart->huart.USART_Parity = USART_Parity_Even;
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break;
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default:
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uart->huart.USART_Parity = USART_Parity_No;
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break;
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}
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// if (HAL_UART_Init(&uart->huart) != HAL_OK)
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// {
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// return RT_ERROR;
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// }
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if(uart->USARTx == USART1)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);
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// uart->irq=USART1_IRQn;
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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USART_Init(uart->USARTx,&uart->huart);
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USART_Cmd(uart->USARTx, ENABLE);
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}
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return RT_EOK;
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}
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static rt_err_t ch32_control(struct rt_serial_device *serial, int cmd, void *arg)
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{
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struct ch32_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct ch32_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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NVIC_DisableIRQ(uart->irq);
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/* disable interrupt */
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USART_ITConfig(uart->USARTx,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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NVIC_EnableIRQ(uart->irq);
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/* enable interrupt */
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USART_ITConfig(uart->USARTx, USART_IT_RXNE,ENABLE);
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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 ch32_putc(struct rt_serial_device *serial, char c)
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{
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struct ch32_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct ch32_uart *)serial->parent.user_data;
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// while (__HAL_UART_GET_FLAG(&uart->huart, UART_FLAG_TXE) == RESET);
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while (USART_GetFlagStatus(uart->USARTx, USART_FLAG_TC) == RESET);
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uart->USARTx->DATAR = c;
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return 1;
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}
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static int ch32_getc(struct rt_serial_device *serial)
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{
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int ch;
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struct ch32_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct ch32_uart *)serial->parent.user_data;
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ch = -1;
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if (USART_GetFlagStatus(uart->USARTx, USART_FLAG_RXNE) != RESET)
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{
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ch = uart->USARTx->DATAR & 0xff;
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}
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return ch;
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}
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rt_size_t ch32dma_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 RT_EOK;
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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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{
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struct ch32_uart *uart = (struct ch32_uart *) serial->parent.user_data;
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RT_ASSERT(uart != RT_NULL);
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if (USART_GetITStatus(uart->USARTx, USART_IT_RXNE) != RESET)
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{
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rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
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USART_ClearITPendingBit(uart->USARTx, USART_IT_RXNE);
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}
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}
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static const struct rt_uart_ops ch32_uart_ops =
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{
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ch32_configure,
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ch32_control,
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ch32_putc,
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ch32_getc,
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ch32dma_transmit
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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 ch32_uart uart1;
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struct rt_serial_device serial1;
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void USART1_IRQHandler(void) __attribute__((interrupt()));
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void USART1_IRQHandler(void)
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{
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GET_INT_SP();
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/* enter interrupt */
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rt_interrupt_enter();
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// printf("int_SP:%08x\n",__get_SP());
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uart_isr(&serial1);
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/* leave interrupt */
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rt_interrupt_leave();
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FREE_INT_SP();
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}
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#endif /* RT_USING_UART1 */
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int rt_hw_usart_init(void)
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{
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struct ch32_uart *uart;
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struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
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// ch32_uart_ops.configure = ch32_configure;
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// ch32_uart_ops.control = ch32_control;
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// ch32_uart_ops.putc = ch32_putc;
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// ch32_uart_ops.getc = ch32_getc;
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// ch32_uart_ops.dma_transmit= ch32dma_transmit;
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#if defined(RT_USING_UART1)
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uart=&uart1;
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uart->irq=USART1_IRQn;
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uart->USARTx=USART1;
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config.baud_rate = BAUD_RATE_115200;
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serial1.ops = &ch32_uart_ops;
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serial1.config = config;
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uart->huart.USART_BaudRate = 115200;
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uart->huart.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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uart->huart.USART_Mode = USART_Mode_Rx|USART_Mode_Tx;
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uart->huart.USART_WordLength = USART_WordLength_8b;
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uart->huart.USART_StopBits = USART_StopBits_1;
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uart->huart.USART_Parity = USART_Parity_No;
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if(uart->USARTx == USART1)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);
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// uart->irq=USART1_IRQn;
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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USART_Init(uart->USARTx,&uart->huart);
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USART_Cmd(uart->USARTx, ENABLE);
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}
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/* register UART1 device */
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rt_hw_serial_register(&serial1, "uart1",
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
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uart);
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#endif /* RT_USING_UART1 */
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return 0;
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}
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INIT_BOARD_EXPORT(rt_hw_usart_init);
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