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/*
* File : usart.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006-2013, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* 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)
*/
#include "board.h"
#include <rtdevice.h>
/* STM32 uart driver */
struct stm32_uart
{
UART_HandleTypeDef huart;
IRQn_Type irq;
};
static rt_err_t stm32_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
struct stm32_uart *uart;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
uart = (struct stm32_uart *)serial->parent.user_data;
uart->huart.Init.BaudRate = cfg->baud_rate;
uart->huart.Init.HwFlowCtl = UART_HWCONTROL_NONE;
uart->huart.Init.Mode = UART_MODE_TX_RX;
uart->huart.Init.OverSampling = UART_OVERSAMPLING_16;
switch (cfg->data_bits)
{
case DATA_BITS_8:
uart->huart.Init.WordLength = UART_WORDLENGTH_8B;
break;
case DATA_BITS_9:
uart->huart.Init.WordLength = UART_WORDLENGTH_9B;
break;
default:
uart->huart.Init.WordLength = UART_WORDLENGTH_8B;
break;
}
switch (cfg->stop_bits)
{
case STOP_BITS_1:
uart->huart.Init.StopBits = UART_STOPBITS_1;
break;
case STOP_BITS_2:
uart->huart.Init.StopBits = UART_STOPBITS_2;
break;
default:
uart->huart.Init.StopBits = UART_STOPBITS_1;
break;
}
switch (cfg->parity)
{
case PARITY_NONE:
uart->huart.Init.Parity = UART_PARITY_NONE;
break;
case PARITY_ODD:
uart->huart.Init.Parity = UART_PARITY_ODD;
break;
case PARITY_EVEN:
uart->huart.Init.Parity = UART_PARITY_EVEN;
break;
default:
uart->huart.Init.Parity = UART_PARITY_NONE;
break;
}
if (HAL_UART_Init(&uart->huart) != HAL_OK)
{
return RT_ERROR;
}
return RT_EOK;
}
static rt_err_t stm32_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct stm32_uart* uart;
// rt_uint32_t ctrl_arg = (rt_uint32_t)(arg);
RT_ASSERT(serial != RT_NULL);
uart = (struct stm32_uart *)serial->parent.user_data;
switch (cmd)
{
/* disable interrupt */
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
NVIC_DisableIRQ(uart->irq);
/* disable interrupt */
__HAL_UART_DISABLE_IT(&uart->huart, USART_IT_RXNE);
break;
/* enable interrupt */
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
NVIC_EnableIRQ(uart->irq);
/* enable interrupt */
__HAL_UART_ENABLE_IT(&uart->huart, USART_IT_RXNE);
break;
}
return RT_EOK;
}
static int stm32_putc(struct rt_serial_device *serial, char c)
{
struct stm32_uart* uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct stm32_uart *)serial->parent.user_data;
while(__HAL_UART_GET_FLAG(&uart->huart,UART_FLAG_TXE) == RESET);
uart->huart.Instance->DR = c;
return 1;
}
static int stm32_getc(struct rt_serial_device *serial)
{
int ch;
struct stm32_uart* uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct stm32_uart *)serial->parent.user_data;
ch = -1;
if (__HAL_UART_GET_FLAG(&uart->huart,UART_FLAG_RXNE) != RESET)
{
ch = uart->huart.Instance->DR & 0xff;
}
return ch;
}
/**
* Uart common interrupt process. This need add to uart ISR.
*
* @param serial serial device
*/
static void uart_isr(struct rt_serial_device *serial) {
struct stm32_uart *uart = (struct stm32_uart *) serial->parent.user_data;
RT_ASSERT(uart != RT_NULL);
if((__HAL_UART_GET_FLAG(&uart->huart, UART_FLAG_RXNE) != RESET) && (__HAL_UART_GET_IT_SOURCE(&uart->huart,UART_IT_RXNE) != RESET))
{
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
__HAL_UART_CLEAR_FLAG(&uart->huart,UART_FLAG_RXNE);
}
}
static const struct rt_uart_ops stm32_uart_ops =
{
stm32_configure,
stm32_control,
stm32_putc,
stm32_getc,
};
#if defined(RT_USING_UART1)
/* UART1 device driver structure */
struct stm32_uart uart1 =
{
{USART1},
USART1_IRQn
};
struct rt_serial_device serial1;
void USART1_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uart_isr(&serial1);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* RT_USING_UART1 */
#if defined(RT_USING_UART2)
/* UART1 device driver structure */
struct stm32_uart uart2 =
{
{USART2},
USART2_IRQn
};
struct rt_serial_device serial2;
void USART2_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uart_isr(&serial2);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* RT_USING_UART2 */
#if defined(RT_USING_UART3)
/* UART1 device driver structure */
struct stm32_uart uart3 =
{
{USART3},
USART3_IRQn
};
struct rt_serial_device serial3;
void USART3_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uart_isr(&serial3);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* RT_USING_UART2 */
static void MX_USART_UART_Init(UART_HandleTypeDef* uartHandle);
void rt_hw_usart_init(void)
{
struct stm32_uart* uart;
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
#if defined(RT_USING_UART1)
uart = &uart1;
config.baud_rate = BAUD_RATE_115200;
serial1.ops = &stm32_uart_ops;
serial1.config = config;
MX_USART_UART_Init(&uart->huart);
/* register UART1 device */
rt_hw_serial_register(&serial1, "uart1",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_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;
MX_USART_UART_Init(&uart->huart);
/* register UART1 device */
rt_hw_serial_register(&serial2, "uart2",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX ,
uart);
#endif /* RT_USING_UART1 */
#if defined(RT_USING_UART3)
uart = &uart3;
config.baud_rate = BAUD_RATE_115200;
serial3.ops = &stm32_uart_ops;
serial3.config = config;
MX_USART_UART_Init(&uart->huart);
/* register UART1 device */
rt_hw_serial_register(&serial3, "uart3",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX ,
uart);
#endif /* RT_USING_UART1 */
}
static void MX_USART_UART_Init(UART_HandleTypeDef* uartHandle)
{
uartHandle->Init.BaudRate = 115200;
uartHandle->Init.WordLength = UART_WORDLENGTH_8B;
uartHandle->Init.StopBits = UART_STOPBITS_1;
uartHandle->Init.Parity = UART_PARITY_NONE;
uartHandle->Init.Mode = UART_MODE_TX_RX;
uartHandle->Init.HwFlowCtl = UART_HWCONTROL_NONE;
uartHandle->Init.OverSampling = UART_OVERSAMPLING_16;
RT_ASSERT(HAL_UART_Init(uartHandle) == HAL_OK);
}
/* USART2 init function */
void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
{
GPIO_InitTypeDef GPIO_InitStruct;
if(uartHandle->Instance==USART1)
{
/* USER CODE BEGIN USART1_MspInit 0 */
/* USER CODE END USART1_MspInit 0 */
/* USART1 clock enable */
__HAL_RCC_USART1_CLK_ENABLE();
/**USART1 GPIO Configuration
PA9 ------> USART1_TX
PA10 ------> USART1_RX
*/
GPIO_InitStruct.Pin = GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* USART1 interrupt Init */
HAL_NVIC_SetPriority(USART1_IRQn, 5, 0);
HAL_NVIC_EnableIRQ(USART1_IRQn);
/* USER CODE BEGIN USART1_MspInit 1 */
/* USER CODE END USART1_MspInit 1 */
}
else if(uartHandle->Instance==USART2)
{
/* USER CODE BEGIN USART2_MspInit 0 */
/* USER CODE END USART2_MspInit 0 */
/* USART2 clock enable */
__HAL_RCC_USART2_CLK_ENABLE();
/**USART2 GPIO Configuration
PA2 ------> USART2_TX
PA3 ------> USART2_RX
*/
GPIO_InitStruct.Pin = GPIO_PIN_2;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* USART2 interrupt Init */
HAL_NVIC_SetPriority(USART2_IRQn, 5, 0);
HAL_NVIC_EnableIRQ(USART2_IRQn);
/* USER CODE BEGIN USART2_MspInit 1 */
/* USER CODE END USART2_MspInit 1 */
}
else if(uartHandle->Instance==USART3)
{
/* USER CODE BEGIN USART3_MspInit 0 */
/* USER CODE END USART3_MspInit 0 */
/* USART3 clock enable */
__HAL_RCC_USART3_CLK_ENABLE();
/**USART3 GPIO Configuration
PB10 ------> USART3_TX
PB11 ------> USART3_RX
*/
GPIO_InitStruct.Pin = GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_11;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* USART3 interrupt Init */
HAL_NVIC_SetPriority(USART3_IRQn, 5, 0);
HAL_NVIC_EnableIRQ(USART3_IRQn);
/* USER CODE BEGIN USART3_MspInit 1 */
/* USER CODE END USART3_MspInit 1 */
}
}
void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
{
if(uartHandle->Instance==USART1)
{
/* USER CODE BEGIN USART1_MspDeInit 0 */
/* USER CODE END USART1_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_USART1_CLK_DISABLE();
/**USART1 GPIO Configuration
PA9 ------> USART1_TX
PA10 ------> USART1_RX
*/
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_9|GPIO_PIN_10);
/* USART1 interrupt Deinit */
HAL_NVIC_DisableIRQ(USART1_IRQn);
/* USER CODE BEGIN USART1_MspDeInit 1 */
/* USER CODE END USART1_MspDeInit 1 */
}
else if(uartHandle->Instance==USART2)
{
/* USER CODE BEGIN USART2_MspDeInit 0 */
/* USER CODE END USART2_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_USART2_CLK_DISABLE();
/**USART2 GPIO Configuration
PA2 ------> USART2_TX
PA3 ------> USART2_RX
*/
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_2|GPIO_PIN_3);
/* USART2 interrupt Deinit */
HAL_NVIC_DisableIRQ(USART2_IRQn);
/* USER CODE BEGIN USART2_MspDeInit 1 */
/* USER CODE END USART2_MspDeInit 1 */
}
else if(uartHandle->Instance==USART3)
{
/* USER CODE BEGIN USART3_MspDeInit 0 */
/* USER CODE END USART3_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_USART3_CLK_DISABLE();
/**USART3 GPIO Configuration
PB10 ------> USART3_TX
PB11 ------> USART3_RX
*/
HAL_GPIO_DeInit(GPIOB, GPIO_PIN_10|GPIO_PIN_11);
/* USART3 interrupt Deinit */
HAL_NVIC_DisableIRQ(USART3_IRQn);
/* USER CODE BEGIN USART3_MspDeInit 1 */
/* USER CODE END USART3_MspDeInit 1 */
}
}
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