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rt-thread/bsp/stm32l476-nucleo/drivers/drv_usart.c

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/*
* File : drv_usart.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2015, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2009-01-05 Bernard the first version
* 2015-08-01 xiaonong the first version for stm32f7xx
* 2016-01-15 ArdaFu the first version for stm32f4xx with STM32 HAL
* 2016-01-15 zyh the first version for stm32f401rc with STM32 HAL
*/
#include "drv_usart.h"
#include "board.h"
#include <rtdevice.h>
#include <rthw.h>
#include <rtthread.h>
/* STM32 uart driver */
struct drv_uart
{
UART_HandleTypeDef UartHandle;
IRQn_Type irq;
};
static rt_err_t drv_configure(struct rt_serial_device *serial,
struct serial_configure *cfg)
{
struct drv_uart *uart;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
uart = (struct drv_uart *)serial->parent.user_data;
uart->UartHandle.Init.BaudRate = cfg->baud_rate;
uart->UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
uart->UartHandle.Init.Mode = UART_MODE_TX_RX;
uart->UartHandle.Init.OverSampling = UART_OVERSAMPLING_16;
uart->UartHandle.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
switch (cfg->data_bits)
{
case DATA_BITS_8:
uart->UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
break;
case DATA_BITS_9:
uart->UartHandle.Init.WordLength = UART_WORDLENGTH_9B;
break;
default:
uart->UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
break;
}
switch (cfg->stop_bits)
{
case STOP_BITS_1:
uart->UartHandle.Init.StopBits = UART_STOPBITS_1;
break;
case STOP_BITS_2:
uart->UartHandle.Init.StopBits = UART_STOPBITS_2;
break;
default:
uart->UartHandle.Init.StopBits = UART_STOPBITS_1;
break;
}
switch (cfg->parity)
{
case PARITY_NONE:
uart->UartHandle.Init.Parity = UART_PARITY_NONE;
break;
case PARITY_ODD:
uart->UartHandle.Init.Parity = UART_PARITY_ODD;
break;
case PARITY_EVEN:
uart->UartHandle.Init.Parity = UART_PARITY_EVEN;
break;
default:
uart->UartHandle.Init.Parity = UART_PARITY_NONE;
break;
}
if (HAL_UART_Init(&uart->UartHandle) != HAL_OK)
{
return RT_ERROR;
}
return RT_EOK;
}
static rt_err_t drv_control(struct rt_serial_device *serial,
int cmd, void *arg)
{
struct drv_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct drv_uart *)serial->parent.user_data;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
NVIC_DisableIRQ(uart->irq);
/* disable interrupt */
__HAL_UART_DISABLE_IT(&uart->UartHandle, UART_IT_RXNE);
break;
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
HAL_NVIC_SetPriority(uart->irq, 5, 0);
NVIC_EnableIRQ(uart->irq);
/* enable interrupt */
__HAL_UART_ENABLE_IT(&uart->UartHandle, UART_IT_RXNE);
break;
}
return RT_EOK;
}
static int drv_putc(struct rt_serial_device *serial, char c)
{
struct drv_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct drv_uart *)serial->parent.user_data;
while ((__HAL_UART_GET_FLAG(&uart->UartHandle, UART_FLAG_TXE) == RESET));
uart->UartHandle.Instance->TDR = c;
return 1;
}
static int drv_getc(struct rt_serial_device *serial)
{
int ch;
struct drv_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct drv_uart *)serial->parent.user_data;
ch = -1;
if (__HAL_UART_GET_FLAG(&uart->UartHandle, UART_FLAG_RXNE) != RESET)
ch = uart->UartHandle.Instance->RDR & 0xff;
return ch;
}
static const struct rt_uart_ops drv_uart_ops =
{
drv_configure,
drv_control,
drv_putc,
drv_getc,
};
#if defined(BSP_USING_UART1)
/* UART1 device driver structure */
static struct drv_uart uart1;
struct rt_serial_device serial1;
void USART1_IRQHandler(void)
{
struct drv_uart *uart;
uart = &uart1;
/* enter interrupt */
rt_interrupt_enter();
/* UART in mode Receiver -------------------------------------------------*/
if ((__HAL_UART_GET_FLAG(&uart->UartHandle, UART_FLAG_RXNE) != RESET) &&
(__HAL_UART_GET_IT_SOURCE(&uart->UartHandle, UART_IT_RXNE) != RESET))
{
rt_hw_serial_isr(&serial1, RT_SERIAL_EVENT_RX_IND);
/* Clear RXNE interrupt flag */
__HAL_UART_CLEAR_FLAG(&uart->UartHandle, UART_FLAG_RXNE);
}
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART1 */
#if defined(BSP_USING_UART2)
/* UART2 device driver structure */
static struct drv_uart uart2;
struct rt_serial_device serial2;
void USART2_IRQHandler(void)
{
struct drv_uart *uart;
uart = &uart2;
/* enter interrupt */
rt_interrupt_enter();
/* UART in mode Receiver -------------------------------------------------*/
if ((__HAL_UART_GET_FLAG(&uart->UartHandle, UART_FLAG_RXNE) != RESET) &&
(__HAL_UART_GET_IT_SOURCE(&uart->UartHandle, UART_IT_RXNE) != RESET))
{
rt_hw_serial_isr(&serial2, RT_SERIAL_EVENT_RX_IND);
/* Clear RXNE interrupt flag */
__HAL_UART_CLEAR_FLAG(&uart->UartHandle, UART_FLAG_RXNE);
}
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART2 */
#if defined(BSP_USING_UART3)
/* UART3 device driver structure */
static struct drv_uart uart3;
struct rt_serial_device serial3;
void USART3_IRQHandler(void)
{
struct drv_uart *uart;
uart = &uart3;
/* enter interrupt */
rt_interrupt_enter();
/* UART in mode Receiver -------------------------------------------------*/
if ((__HAL_UART_GET_FLAG(&uart->UartHandle, UART_FLAG_RXNE) != RESET) &&
(__HAL_UART_GET_IT_SOURCE(&uart->UartHandle, UART_IT_RXNE) != RESET))
{
rt_hw_serial_isr(&serial3, RT_SERIAL_EVENT_RX_IND);
/* Clear RXNE interrupt flag */
__HAL_UART_CLEAR_FLAG(&uart->UartHandle, UART_FLAG_RXNE);
}
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART3 */
#if defined(BSP_USING_UART4)
/* UART4 device driver structure */
static struct drv_uart uart4;
struct rt_serial_device serial4;
void UART4_IRQHandler(void)
{
struct drv_uart *uart;
uart = &uart4;
/* enter interrupt */
rt_interrupt_enter();
/* UART in mode Receiver -------------------------------------------------*/
if ((__HAL_UART_GET_FLAG(&uart->UartHandle, UART_FLAG_RXNE) != RESET) &&
(__HAL_UART_GET_IT_SOURCE(&uart->UartHandle, UART_IT_RXNE) != RESET))
{
rt_hw_serial_isr(&serial4, RT_SERIAL_EVENT_RX_IND);
/* Clear RXNE interrupt flag */
__HAL_UART_CLEAR_FLAG(&uart->UartHandle, UART_FLAG_RXNE);
}
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART4 */
#if defined(BSP_USING_UART5)
/* UART5 device driver structure */
static struct drv_uart uart5;
struct rt_serial_device serial5;
void UART5_IRQHandler(void)
{
struct drv_uart *uart;
uart = &uart5;
/* enter interrupt */
rt_interrupt_enter();
/* UART in mode Receiver -------------------------------------------------*/
if ((__HAL_UART_GET_FLAG(&uart->UartHandle, UART_FLAG_RXNE) != RESET) &&
(__HAL_UART_GET_IT_SOURCE(&uart->UartHandle, UART_IT_RXNE) != RESET))
{
rt_hw_serial_isr(&serial5, RT_SERIAL_EVENT_RX_IND);
/* Clear RXNE interrupt flag */
__HAL_UART_CLEAR_FLAG(&uart->UartHandle, UART_FLAG_RXNE);
}
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART5 */
#if defined(BSP_USING_LPUART1)
/* UART6 device driver structure */
static struct drv_uart lpuart1;
struct rt_serial_device lpserial1;
void LPUART1_IRQHandler(void)
{
struct drv_uart *uart;
uart = &lpuart1;
/* enter interrupt */
rt_interrupt_enter();
/* UART in mode Receiver -------------------------------------------------*/
if ((__HAL_UART_GET_FLAG(&uart->UartHandle, UART_FLAG_RXNE) != RESET) &&
(__HAL_UART_GET_IT_SOURCE(&uart->UartHandle, UART_IT_RXNE) != RESET))
{
rt_hw_serial_isr(&lpserial1, RT_SERIAL_EVENT_RX_IND);
/* Clear RXNE interrupt flag */
__HAL_UART_CLEAR_FLAG(&uart->UartHandle, UART_FLAG_RXNE);
}
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_LPUART1 */
/**
* @brief UART MSP Initialization
* This function configures the hardware resources used in this example:
* - Peripheral's clock enable
* - Peripheral's GPIO Configuration
* - NVIC configuration for UART interrupt request enable
* @param huart: UART handle pointer
* @retval None
*/
void HAL_UART_MspInit(UART_HandleTypeDef *uartHandle)
{
GPIO_InitTypeDef GPIO_InitStruct;
if (uartHandle->Instance == LPUART1)
{
/* LPUART1 clock enable */
__HAL_RCC_LPUART1_CLK_ENABLE();
/* GPIOC clock enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
/**LPUART1 GPIO Configuration
PC0 ------> LPUART1_RX
PC1 ------> LPUART1_TX
*/
GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF8_LPUART1;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
}
else if (uartHandle->Instance == UART4)
{
/* UART4 clock enable */
__HAL_RCC_UART4_CLK_ENABLE();
/* GPIOA clock enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
/**UART4 GPIO Configuration
PA0 ------> UART4_TX
PA1 ------> UART4_RX
*/
GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF8_UART4;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
else if (uartHandle->Instance == UART5)
{
/* UART5 clock enable */
__HAL_RCC_UART5_CLK_ENABLE();
/* GPIOD clock enable */
__HAL_RCC_GPIOD_CLK_ENABLE();
/* GPIOC clock enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
/**UART5 GPIO Configuration
PC12 ------> UART5_TX
PD2 ------> UART5_RX
*/
GPIO_InitStruct.Pin = GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF8_UART5;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_2;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF8_UART5;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
}
else if (uartHandle->Instance == USART1)
{
/* USART1 clock enable */
__HAL_RCC_USART1_CLK_ENABLE();
/* GPIOA clock enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
/**USART1 GPIO Configuration
PA9 ------> USART1_TX
PA10 ------> USART1_RX
*/
GPIO_InitStruct.Pin = GPIO_PIN_9 | GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
else if (uartHandle->Instance == USART2)
{
/* USART2 clock enable */
__HAL_RCC_USART2_CLK_ENABLE();
/* GPIOA clock enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
/**USART2 GPIO Configuration
PA2 ------> USART2_TX
PA3 ------> USART2_RX
*/
GPIO_InitStruct.Pin = GPIO_PIN_2 | GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
else if (uartHandle->Instance == USART3)
{
/* USART3 clock enable */
__HAL_RCC_USART3_CLK_ENABLE();
/* GPIOC clock enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
/**USART3 GPIO Configuration
PC4 ------> USART3_TX
PC5 ------> USART3_RX
*/
GPIO_InitStruct.Pin = GPIO_PIN_4 | GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF7_USART3;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
}
}
void HAL_UART_MspDeInit(UART_HandleTypeDef *uartHandle)
{
if (uartHandle->Instance == LPUART1)
{
/* Peripheral clock disable */
__HAL_RCC_LPUART1_CLK_DISABLE();
/**LPUART1 GPIO Configuration
PC0 ------> LPUART1_RX
PC1 ------> LPUART1_TX
*/
HAL_GPIO_DeInit(GPIOC, GPIO_PIN_0 | GPIO_PIN_1);
}
else if (uartHandle->Instance == UART4)
{
/* Peripheral clock disable */
__HAL_RCC_UART4_CLK_DISABLE();
/**UART4 GPIO Configuration
PA0 ------> UART4_TX
PA1 ------> UART4_RX
*/
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_0 | GPIO_PIN_1);
}
else if (uartHandle->Instance == UART5)
{
/* Peripheral clock disable */
__HAL_RCC_UART5_CLK_DISABLE();
/**UART5 GPIO Configuration
PC12 ------> UART5_TX
PD2 ------> UART5_RX
*/
HAL_GPIO_DeInit(GPIOC, GPIO_PIN_12);
HAL_GPIO_DeInit(GPIOD, GPIO_PIN_2);
}
else if (uartHandle->Instance == USART1)
{
/* 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);
}
else if (uartHandle->Instance == USART2)
{
/* 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);
}
else if (uartHandle->Instance == USART3)
{
/* Peripheral clock disable */
__HAL_RCC_USART3_CLK_DISABLE();
/**USART3 GPIO Configuration
PC4 ------> USART3_TX
PC5 ------> USART3_RX
*/
HAL_GPIO_DeInit(GPIOC, GPIO_PIN_4 | GPIO_PIN_5);
}
}
int bsp_hw_usart_init(void)
{
struct drv_uart *uart;
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
#ifdef BSP_USING_UART1
uart = &uart1;
uart->UartHandle.Instance = USART1;
uart->irq = USART1_IRQn;
serial1.ops = &drv_uart_ops;
serial1.config = config;
/* register UART1 device */
rt_hw_serial_register(&serial1, "uart1",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
#endif /* BSP_USING_UART1 */
#ifdef BSP_USING_UART2
uart = &uart2;
uart->UartHandle.Instance = USART2;
uart->irq = USART2_IRQn;
serial2.ops = &drv_uart_ops;
serial2.config = config;
/* register UART2 device */
rt_hw_serial_register(&serial2, "uart2",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
#endif /* BSP_USING_UART2 */
#ifdef BSP_USING_UART3
uart = &uart3;
uart->UartHandle.Instance = USART3;
uart->irq = USART3_IRQn;
serial3.ops = &drv_uart_ops;
serial3.config = config;
/* register UART3 device */
rt_hw_serial_register(&serial3, "uart3",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
#endif /* BSP_USING_UART3 */
#ifdef BSP_USING_UART4
uart = &uart4;
uart->UartHandle.Instance = UART4;
uart->irq = UART4_IRQn;
serial4.ops = &drv_uart_ops;
serial4.config = config;
/* register UART4 device */
rt_hw_serial_register(&serial4, "uart4",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
#endif /* BSP_USING_UART4 */
#ifdef BSP_USING_UART5
uart = &uart5;
uart->UartHandle.Instance = UART5;
uart->irq = UART5_IRQn;
serial5.ops = &drv_uart_ops;
serial5.config = config;
/* register UART5 device */
rt_hw_serial_register(&serial5, "uart5",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
#endif /* BSP_USING_UART5 */
#ifdef BSP_USING_LPUART1
uart = &lpuart1;
uart->UartHandle.Instance = LPUART1;
uart->irq = LPUART1_IRQn;
lpserial1.ops = &drv_uart_ops;
lpserial1.config = config;
/* register LPUART1 device */
rt_hw_serial_register(&lpserial1, "lpuart1",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
#endif /* BSP_USING_LPUART1 */
return 0;
}
INIT_BOARD_EXPORT(bsp_hw_usart_init);
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