/* * Copyright (c) 2006-2022, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2009-01-05 Bernard the first version * 2010-03-29 Bernard remove interrupt Tx and DMA Rx mode * 2013-05-13 aozima update for kehong-lingtai. * 2015-01-31 armink make sure the serial transmit complete in putc() * 2016-05-13 armink add DMA Rx mode * 2017-01-19 aubr.cool add interrupt Tx mode * 2017-04-13 aubr.cool correct Rx parity err * 2017-10-20 ZYH porting to HAL Libraries(with out DMA) * 2017-11-15 ZYH update to 3.0.0 */ #include "board.h" #include #include /* uart driver */ struct ch32_uart { USART_InitTypeDef huart; USART_TypeDef *USARTx; IRQn_Type irq; }; static rt_err_t ch32_configure(struct rt_serial_device *serial, struct serial_configure *cfg) { struct ch32_uart *uart; RT_ASSERT(serial != RT_NULL); RT_ASSERT(cfg != RT_NULL); uart = (struct ch32_uart *)serial->parent.user_data; uart->huart.USART_BaudRate = cfg->baud_rate; uart->huart.USART_HardwareFlowControl = USART_HardwareFlowControl_None; uart->huart.USART_Mode = USART_Mode_Rx|USART_Mode_Tx; switch (cfg->data_bits) { case DATA_BITS_8: uart->huart.USART_WordLength = USART_WordLength_8b; break; case DATA_BITS_9: uart->huart.USART_WordLength = USART_WordLength_9b; break; default: uart->huart.USART_WordLength = USART_WordLength_8b; break; } switch (cfg->stop_bits) { case STOP_BITS_1: uart->huart.USART_StopBits = USART_StopBits_1; break; case STOP_BITS_2: uart->huart.USART_StopBits = USART_StopBits_2; break; default: uart->huart.USART_StopBits = USART_StopBits_1; break; } switch (cfg->parity) { case PARITY_NONE: uart->huart.USART_Parity = USART_Parity_No; break; case PARITY_ODD: uart->huart.USART_Parity = USART_Parity_Odd; break; case PARITY_EVEN: uart->huart.USART_Parity = USART_Parity_Even; break; default: uart->huart.USART_Parity = USART_Parity_No; break; } if(uart->USARTx == USART1) { GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); USART_Init(uart->USARTx,&uart->huart); USART_Cmd(uart->USARTx, ENABLE); } return RT_EOK; } static rt_err_t ch32_control(struct rt_serial_device *serial, int cmd, void *arg) { struct ch32_uart *uart; RT_ASSERT(serial != RT_NULL); uart = (struct ch32_uart *)serial->parent.user_data; switch (cmd) { /* disable interrupt */ case RT_DEVICE_CTRL_CLR_INT: /* disable rx irq */ NVIC_DisableIRQ(uart->irq); /* disable interrupt */ USART_ITConfig(uart->USARTx,USART_IT_RXNE,DISABLE); break; /* enable interrupt */ case RT_DEVICE_CTRL_SET_INT: /* enable rx irq */ NVIC_EnableIRQ(uart->irq); /* enable interrupt */ USART_ITConfig(uart->USARTx, USART_IT_RXNE,ENABLE); break; } return RT_EOK; } static int ch32_putc(struct rt_serial_device *serial, char c) { struct ch32_uart *uart; RT_ASSERT(serial != RT_NULL); uart = (struct ch32_uart *)serial->parent.user_data; while (USART_GetFlagStatus(uart->USARTx, USART_FLAG_TC) == RESET); uart->USARTx->DATAR = c; return 1; } static int ch32_getc(struct rt_serial_device *serial) { int ch; struct ch32_uart *uart; RT_ASSERT(serial != RT_NULL); uart = (struct ch32_uart *)serial->parent.user_data; ch = -1; if (USART_GetFlagStatus(uart->USARTx, USART_FLAG_RXNE) != RESET) { ch = uart->USARTx->DATAR & 0xff; } return ch; } rt_size_t ch32dma_transmit(struct rt_serial_device *serial, rt_uint8_t *buf, rt_size_t size, int direction) { return RT_EOK; } /** * Uart common interrupt process. This need add to uart ISR. * * @param serial serial device */ static void uart_isr(struct rt_serial_device *serial) { struct ch32_uart *uart = (struct ch32_uart *) serial->parent.user_data; RT_ASSERT(uart != RT_NULL); if (USART_GetITStatus(uart->USARTx, USART_IT_RXNE) != RESET) { rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND); USART_ClearITPendingBit(uart->USARTx, USART_IT_RXNE); } } static const struct rt_uart_ops ch32_uart_ops = { ch32_configure, ch32_control, ch32_putc, ch32_getc, ch32dma_transmit }; #if defined(BSP_USING_UART1) /* UART1 device driver structure */ struct ch32_uart uart1; struct rt_serial_device serial1; void USART1_IRQHandler(void) __attribute__((interrupt())); void USART1_IRQHandler(void) { GET_INT_SP(); /* enter interrupt */ rt_interrupt_enter(); uart_isr(&serial1); /* leave interrupt */ rt_interrupt_leave(); FREE_INT_SP(); } #endif /* BSP_USING_UART1 */ int rt_hw_usart_init(void) { struct ch32_uart *uart; struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT; #if defined(BSP_USING_UART1) uart=&uart1; uart->irq=USART1_IRQn; uart->USARTx=USART1; config.baud_rate = BAUD_RATE_115200; serial1.ops = &ch32_uart_ops; serial1.config = config; uart->huart.USART_BaudRate = 115200; uart->huart.USART_HardwareFlowControl = USART_HardwareFlowControl_None; uart->huart.USART_Mode = USART_Mode_Rx|USART_Mode_Tx; uart->huart.USART_WordLength = USART_WordLength_8b; uart->huart.USART_StopBits = USART_StopBits_1; uart->huart.USART_Parity = USART_Parity_No; if(uart->USARTx == USART1) { GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); USART_Init(uart->USARTx,&uart->huart); USART_Cmd(uart->USARTx, ENABLE); } /* register UART1 device */ rt_hw_serial_register(&serial1, "uart1", RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX, uart); #endif /* BSP_USING_UART1 */ return 0; } INIT_BOARD_EXPORT(rt_hw_usart_init);