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rt-thread-official/bsp/stm32l475-iot-disco/drivers/usart.c

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/*
* Copyright (c) 2006-2018, 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
* 2012-02-08 aozima update for F4.
* 2012-07-28 aozima update for ART board.
* 2016-05-28 armink add DMA Rx mode
*/
#include <stm32l4xx.h>
#include "usart.h"
#include "board.h"
#include <rtdevice.h>
#ifdef RT_USING_UART1
#define USART1_RX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOB_CLK_ENABLE()
#define USART1_TX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOB_CLK_ENABLE()
/* Definition for USART1 Pins */
#define USART1_TX_PIN GPIO_PIN_6
#define USART1_TX_GPIO_PORT GPIOB
#define USART1_TX_AF GPIO_AF7_USART1
#define USART1_RX_PIN GPIO_PIN_7
#define USART1_RX_GPIO_PORT GPIOB
#define USART1_RX_AF GPIO_AF7_USART1
#endif
#ifdef RT_USING_UART2
#define USART2_RX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOA_CLK_ENABLE()
#define USART2_TX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOA_CLK_ENABLE()
/* Definition for USART2 Pins */
#define USART2_TX_PIN GPIO_PIN_2
#define USART2_TX_GPIO_PORT GPIOA
#define USART2_TX_AF GPIO_AF7_USART2
#define USART2_RX_PIN GPIO_PIN_3
#define USART2_RX_GPIO_PORT GPIOA
#define USART2_RX_AF GPIO_AF7_USART2
#endif
#ifdef RT_USING_UART3
#define USART3_RX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOB_CLK_ENABLE()
#define USART3_TX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOB_CLK_ENABLE()
/* Definition for USART3 Pins */
#define USART3_TX_PIN GPIO_PIN_4
#define USART3_TX_GPIO_PORT GPIOC
#define USART3_TX_AF GPIO_AF7_USART3
#define USART3_RX_PIN GPIO_PIN_5
#define USART3_RX_GPIO_PORT GPIOC
#define USART3_RX_AF GPIO_AF7_USART3
#endif
#ifdef RT_USING_UART4
#define USART4_RX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOC_CLK_ENABLE()
#define USART4_TX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOC_CLK_ENABLE()
/* Definition for USART4 Pins */
#define USART4_TX_PIN GPIO_PIN_0
#define USART4_TX_GPIO_PORT GPIOA
#define USART4_TX_AF GPIO_AF8_UART4
#define USART4_RX_PIN GPIO_PIN_1
#define USART4_RX_GPIO_PORT GPIOA
#define USART4_RX_AF GPIO_AF8_UART4
#endif
#ifdef RT_USING_UART5
#define USART5_RX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOD_CLK_ENABLE()
#define USART5_TX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOC_CLK_ENABLE()
/* Definition for USART5 Pins */
#define USART5_TX_PIN GPIO_PIN_12
#define USART5_TX_GPIO_PORT GPIOC
#define USART5_TX_AF GPIO_AF7_USART5
#define USART5_RX_PIN GPIO_PIN_2
#define USART5_RX_GPIO_PORT GPIOD
#define USART5_RX_AF GPIO_AF7_USART5
#endif
/* STM32 uart driver */
struct stm32_uart
{
UART_HandleTypeDef UartHandle;
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->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;
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 stm32_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct stm32_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct stm32_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 */
NVIC_EnableIRQ(uart->irq);
/* enable interrupt */
__HAL_UART_ENABLE_IT(&uart->UartHandle, UART_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->UartHandle, UART_FLAG_TXE) == RESET));
uart->UartHandle.Instance->TDR = 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->UartHandle, UART_FLAG_RXNE) != RESET)
ch = uart->UartHandle.Instance->RDR & 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);
/* 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(serial, RT_SERIAL_EVENT_RX_IND);
/* Clear RXNE interrupt flag */
__HAL_UART_CLEAR_FLAG(&uart->UartHandle, UART_FLAG_RXNE);
}
}
/**
* @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 *huart)
{
GPIO_InitTypeDef GPIO_InitStruct;
#if defined(RT_USING_UART1)
if (huart->Instance == USART1)
{
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO TX/RX clock */
USART1_TX_GPIO_CLK_ENABLE();
USART1_RX_GPIO_CLK_ENABLE();
/* Enable USARTx clock */
__HAL_RCC_USART1_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* UART TX GPIO pin configuration */
GPIO_InitStruct.Pin = USART1_TX_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Alternate = USART1_TX_AF;
HAL_GPIO_Init(USART1_TX_GPIO_PORT, &GPIO_InitStruct);
/* UART RX GPIO pin configuration */
GPIO_InitStruct.Pin = USART1_RX_PIN;
GPIO_InitStruct.Alternate = USART1_RX_AF;
HAL_GPIO_Init(USART1_RX_GPIO_PORT, &GPIO_InitStruct);
HAL_NVIC_SetPriority(USART1_IRQn, 0, 1);
HAL_NVIC_EnableIRQ(USART1_IRQn);
}
#endif
#if defined(RT_USING_UART2)
if (huart->Instance == USART2)
{
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO TX/RX clock */
USART2_TX_GPIO_CLK_ENABLE();
USART2_RX_GPIO_CLK_ENABLE();
/* Enable USARTx clock */
__HAL_RCC_USART2_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* UART TX GPIO pin configuration */
GPIO_InitStruct.Pin = USART2_TX_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Alternate = USART2_TX_AF;
HAL_GPIO_Init(USART2_TX_GPIO_PORT, &GPIO_InitStruct);
/* UART RX GPIO pin configuration */
GPIO_InitStruct.Pin = USART2_RX_PIN;
GPIO_InitStruct.Alternate = USART2_RX_AF;
HAL_GPIO_Init(USART2_RX_GPIO_PORT, &GPIO_InitStruct);
HAL_NVIC_SetPriority(USART2_IRQn, 0, 1);
HAL_NVIC_EnableIRQ(USART2_IRQn);
}
#endif
#if defined(RT_USING_UART3)
if (huart->Instance == USART3)
{
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO TX/RX clock */
USART3_TX_GPIO_CLK_ENABLE();
USART3_RX_GPIO_CLK_ENABLE();
/* Enable USARTx clock */
__HAL_RCC_USART3_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* UART TX GPIO pin configuration */
GPIO_InitStruct.Pin = USART3_TX_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Alternate = USART3_TX_AF;
HAL_GPIO_Init(USART3_TX_GPIO_PORT, &GPIO_InitStruct);
/* UART RX GPIO pin configuration */
GPIO_InitStruct.Pin = USART3_RX_PIN;
GPIO_InitStruct.Alternate = USART3_RX_AF;
HAL_GPIO_Init(USART3_RX_GPIO_PORT, &GPIO_InitStruct);
HAL_NVIC_SetPriority(USART3_IRQn, 0, 1);
HAL_NVIC_EnableIRQ(USART3_IRQn);
}
#endif
#if defined(RT_USING_UART4)
if (huart->Instance == USART4)
{
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO TX/RX clock */
USART4_TX_GPIO_CLK_ENABLE();
USART4_RX_GPIO_CLK_ENABLE();
/* Enable USARTx clock */
__HAL_RCC_USART4_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* UART TX GPIO pin configuration */
GPIO_InitStruct.Pin = USART4_TX_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Alternate = USART4_TX_AF;
HAL_GPIO_Init(USART4_TX_GPIO_PORT, &GPIO_InitStruct);
/* UART RX GPIO pin configuration */
GPIO_InitStruct.Pin = USART4_RX_PIN;
GPIO_InitStruct.Alternate = USART4_RX_AF;
HAL_GPIO_Init(USART4_RX_GPIO_PORT, &GPIO_InitStruct);
HAL_NVIC_SetPriority(USART4_IRQn, 0, 1);
HAL_NVIC_EnableIRQ(USART4_IRQn);
}
#endif
#if defined(RT_USING_UART5)
if (huart->Instance == USART5)
{
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO TX/RX clock */
USART5_TX_GPIO_CLK_ENABLE();
USART5_RX_GPIO_CLK_ENABLE();
/* Enable USARTx clock */
__HAL_RCC_USART5_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* UART TX GPIO pin configuration */
GPIO_InitStruct.Pin = USART5_TX_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Alternate = USART5_TX_AF;
HAL_GPIO_Init(USART5_TX_GPIO_PORT, &GPIO_InitStruct);
/* UART RX GPIO pin configuration */
GPIO_InitStruct.Pin = USART5_RX_PIN;
GPIO_InitStruct.Alternate = USART5_RX_AF;
HAL_GPIO_Init(USART5_RX_GPIO_PORT, &GPIO_InitStruct);
HAL_NVIC_SetPriority(USART5_IRQn, 0, 1);
HAL_NVIC_EnableIRQ(USART5_IRQn);
}
#endif
}
/**
* @brief UART MSP De-Initialization
* This function frees the hardware resources used in this example:
* - Disable the Peripheral's clock
* - Revert GPIO and NVIC configuration to their default state
* @param huart: UART handle pointer
* @retval None
*/
void HAL_UART_MspDeInit(UART_HandleTypeDef *huart)
{
#if defined(RT_USING_UART1)
if (huart->Instance == USART1)
{
/*##-1- Reset peripherals ##################################################*/
__HAL_RCC_USART1_FORCE_RESET();
__HAL_RCC_USART1_RELEASE_RESET();
/*##-2- Disable peripherals and GPIO Clocks #################################*/
/* Configure UART Tx as alternate function */
HAL_GPIO_DeInit(USART1_TX_GPIO_PORT, USART1_TX_PIN);
/* Configure UART Rx as alternate function */
HAL_GPIO_DeInit(USART1_RX_GPIO_PORT, USART1_RX_PIN);
HAL_NVIC_DisableIRQ(USART1_IRQn);
}
#endif
#if defined(RT_USING_UART2)
if (huart->Instance == USART2)
{
/*##-1- Reset peripherals ##################################################*/
__HAL_RCC_USART2_FORCE_RESET();
__HAL_RCC_USART2_RELEASE_RESET();
/*##-2- Disable peripherals and GPIO Clocks #################################*/
/* Configure UART Tx as alternate function */
HAL_GPIO_DeInit(USART2_TX_GPIO_PORT, USART2_TX_PIN);
/* Configure UART Rx as alternate function */
HAL_GPIO_DeInit(USART2_RX_GPIO_PORT, USART2_RX_PIN);
HAL_NVIC_DisableIRQ(USART2_IRQn);
}
#endif
#if defined(RT_USING_UART3)
if (huart->Instance == USART3)
{
/*##-1- Reset peripherals ##################################################*/
__HAL_RCC_USART3_FORCE_RESET();
__HAL_RCC_USART3_RELEASE_RESET();
/*##-2- Disable peripherals and GPIO Clocks #################################*/
/* Configure UART Tx as alternate function */
HAL_GPIO_DeInit(USART3_TX_GPIO_PORT, USART3_TX_PIN);
/* Configure UART Rx as alternate function */
HAL_GPIO_DeInit(USART3_RX_GPIO_PORT, USART3_RX_PIN);
HAL_NVIC_DisableIRQ(USART3_IRQn);
}
#endif
#if defined(RT_USING_UART4)
if (huart->Instance == USART4)
{
/*##-1- Reset peripherals ##################################################*/
__HAL_RCC_USART4_FORCE_RESET();
__HAL_RCC_USART4_RELEASE_RESET();
/*##-2- Disable peripherals and GPIO Clocks #################################*/
/* Configure UART Tx as alternate function */
HAL_GPIO_DeInit(USART4_TX_GPIO_PORT, USART4_TX_PIN);
/* Configure UART Rx as alternate function */
HAL_GPIO_DeInit(USART4_RX_GPIO_PORT, USART4_RX_PIN);
HAL_NVIC_DisableIRQ(USART4_IRQn);
}
#endif
#if defined(RT_USING_UART5)
if (huart->Instance == USART5)
{
/*##-1- Reset peripherals ##################################################*/
__HAL_RCC_USART5_FORCE_RESET();
__HAL_RCC_USART5_RELEASE_RESET();
/*##-2- Disable peripherals and GPIO Clocks #################################*/
/* Configure UART Tx as alternate function */
HAL_GPIO_DeInit(USART5_TX_GPIO_PORT, USART5_TX_PIN);
/* Configure UART Rx as alternate function */
HAL_GPIO_DeInit(USART5_RX_GPIO_PORT, USART5_RX_PIN);
HAL_NVIC_DisableIRQ(USART5_IRQn);
}
#endif
}
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)
/* UART2 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)
/* UART3 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_UART3 */
#if defined(RT_USING_UART4)
/* UART4 device driver structure */
struct stm32_uart uart4 =
{
{UART4},
UART4_IRQn,
};
struct rt_serial_device serial4;
void UART4_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uart_isr(&serial4);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* RT_USING_UART4 */
#if defined(RT_USING_UART5)
/* UART5 device driver structure */
struct stm32_uart uart5 =
{
{UART5},
UART5_IRQn,
};
struct rt_serial_device serial5;
void UART5_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
(&serial5);
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* RT_USING_UART5 */
int stm32_hw_usart_init(void)
{
struct stm32_uart *uart;
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
#ifdef RT_USING_UART1
uart = &uart1;
uart->UartHandle.Instance = USART1;
serial1.ops = &stm32_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 /* RT_USING_UART1 */
#ifdef RT_USING_UART2
uart = &uart2;
uart->UartHandle.Instance = USART2;
serial2.ops = &stm32_uart_ops;
serial2.config = config;
/* register UART1 device */
rt_hw_serial_register(&serial2,
"uart2",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
#endif /* RT_USING_UART2 */
#ifdef RT_USING_UART3
uart = &uart3;
uart->UartHandle.Instance = USART3;
serial3.ops = &stm32_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 /* RT_USING_UART3 */
#ifdef RT_USING_UART4
uart = &uart4;
uart->UartHandle.Instance = USART4;
serial4.ops = &stm32_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 /* RT_USING_UART4 */
#ifdef RT_USING_UART5
uart = &uart5;
uart->UartHandle.Instance = USART5;
serial5.ops = &stm32_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 /* RT_USING_UART5 */
return 0;
}
INIT_BOARD_EXPORT(stm32_hw_usart_init);
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