rt-thread/bsp/stm32f7-disco/drivers/drv_usart.c

/*
 * File      : drv_usart.c
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006 - 2018, 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
 * 2018-05-17     ZYH          first implementation
 */
#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;
    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 */
        HAL_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_EnableIRQ(uart->irq);
        HAL_NVIC_SetPriority(uart->irq, 5, 0);
        /* 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_IT(&uart->UartHandle, UART_FLAG_RXNE);
    }
    /* leave interrupt */
    rt_interrupt_leave();
}
#endif /* BSP_USING_UART1 */

#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_IT(&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_IT(&uart->UartHandle, UART_FLAG_RXNE);
    }
    /* leave interrupt */
    rt_interrupt_leave();
}
#endif /* BSP_USING_UART5 */

#if defined(BSP_USING_UART6)
/* UART6 device driver structure */
static struct drv_uart uart6;
struct rt_serial_device serial6;
void USART6_IRQHandler(void)
{
    struct drv_uart *uart;
    uart = &uart6;
    /* 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(&serial6, RT_SERIAL_EVENT_RX_IND);
        /* Clear RXNE interrupt flag */
        __HAL_UART_CLEAR_IT(&uart->UartHandle, UART_FLAG_RXNE);
    }
    /* leave interrupt */
    rt_interrupt_leave();
}
#endif /* BSP_USING_UART6 */

#if defined(BSP_USING_UART7)
/* UART7 device driver structure */
static struct drv_uart uart7;
struct rt_serial_device serial7;
void UART7_IRQHandler(void)
{
    struct drv_uart *uart;
    uart = &uart7;
    /* 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(&serial7, RT_SERIAL_EVENT_RX_IND);
        /* Clear RXNE interrupt flag */
        __HAL_UART_CLEAR_IT(&uart->UartHandle, UART_FLAG_RXNE);
    }
    /* leave interrupt */
    rt_interrupt_leave();
}
#endif /* BSP_USING_UART7 */

/**
* @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 == UART4)
    {
        /* UART4 clock enable */
        __HAL_RCC_UART4_CLK_ENABLE();
        __HAL_RCC_GPIOC_CLK_ENABLE();
        __HAL_RCC_GPIOA_CLK_ENABLE();
        /**UART4 GPIO Configuration
        PC11     ------> UART4_RX
        PA0/WKUP     ------> UART4_TX
        */
        GPIO_InitStruct.Pin = GPIO_PIN_11;
        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(GPIOC, &GPIO_InitStruct);

        GPIO_InitStruct.Pin = GPIO_PIN_0;
        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);

        /* UART4 interrupt Init */
        HAL_NVIC_SetPriority(UART4_IRQn, 5, 0);
        HAL_NVIC_EnableIRQ(UART4_IRQn);
    }
    else if (uartHandle->Instance == UART5)
    {
        /* UART5 clock enable */
        __HAL_RCC_UART5_CLK_ENABLE();
        __HAL_RCC_GPIOB_CLK_ENABLE();
        __HAL_RCC_GPIOC_CLK_ENABLE();
        /**UART5 GPIO Configuration
        PB8     ------> UART5_RX
        PC12     ------> UART5_TX
        */
        GPIO_InitStruct.Pin = GPIO_PIN_8;
        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_UART5;
        HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

        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);

        /* UART5 interrupt Init */
        HAL_NVIC_SetPriority(UART5_IRQn, 5, 0);
        HAL_NVIC_EnableIRQ(UART5_IRQn);
    }
    else if (uartHandle->Instance == UART7)
    {
        /* UART7 clock enable */
        __HAL_RCC_UART7_CLK_ENABLE();
        __HAL_RCC_GPIOA_CLK_ENABLE();
        /**UART7 GPIO Configuration
        PA15     ------> UART7_TX
        PA8     ------> UART7_RX
        */
        GPIO_InitStruct.Pin = GPIO_PIN_15 | GPIO_PIN_8;
        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
        GPIO_InitStruct.Pull = GPIO_NOPULL;
        GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
        GPIO_InitStruct.Alternate = GPIO_AF12_UART7;
        HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

        /* UART7 interrupt Init */
        HAL_NVIC_SetPriority(UART7_IRQn, 5, 0);
        HAL_NVIC_EnableIRQ(UART7_IRQn);
    }
    else if (uartHandle->Instance == USART1)
    {
        /* USART1 clock enable */
        __HAL_RCC_USART1_CLK_ENABLE();
        __HAL_RCC_GPIOA_CLK_ENABLE();
        /**USART1 GPIO Configuration
        PA10     ------> USART1_RX
        PA9     ------> USART1_TX
        */
        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);

        /* USART1 interrupt Init */
        HAL_NVIC_SetPriority(USART1_IRQn, 5, 0);
        HAL_NVIC_EnableIRQ(USART1_IRQn);
    }
    else if (uartHandle->Instance == USART6)
    {
        /* USART6 clock enable */
        __HAL_RCC_USART6_CLK_ENABLE();
        __HAL_RCC_GPIOC_CLK_ENABLE();
        /**USART6 GPIO Configuration
        PC7     ------> USART6_RX
        PC6     ------> USART6_TX
        */
        GPIO_InitStruct.Pin = GPIO_PIN_7 | GPIO_PIN_6;
        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_USART6;
        HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
    }
}

void HAL_UART_MspDeInit(UART_HandleTypeDef *uartHandle)
{

    if (uartHandle->Instance == UART4)
    {
        /* Peripheral clock disable */
        __HAL_RCC_UART4_CLK_DISABLE();

        /**UART4 GPIO Configuration
        PC11     ------> UART4_RX
        PA0/WKUP     ------> UART4_TX
        */
        HAL_GPIO_DeInit(GPIOC, GPIO_PIN_11);

        HAL_GPIO_DeInit(GPIOA, GPIO_PIN_0);
    }
    else if (uartHandle->Instance == UART5)
    {
        /* Peripheral clock disable */
        __HAL_RCC_UART5_CLK_DISABLE();

        /**UART5 GPIO Configuration
        PB8     ------> UART5_RX
        PC12     ------> UART5_TX
        */
        HAL_GPIO_DeInit(GPIOB, GPIO_PIN_8);

        HAL_GPIO_DeInit(GPIOC, GPIO_PIN_12);
    }
    else if (uartHandle->Instance == UART7)
    {
        /* Peripheral clock disable */
        __HAL_RCC_UART7_CLK_DISABLE();

        /**UART7 GPIO Configuration
        PA15     ------> UART7_TX
        PA8     ------> UART7_RX
        */
        HAL_GPIO_DeInit(GPIOA, GPIO_PIN_15 | GPIO_PIN_8);
    }
    else if (uartHandle->Instance == USART1)
    {
        /* Peripheral clock disable */
        __HAL_RCC_USART1_CLK_DISABLE();

        /**USART1 GPIO Configuration
        PB7     ------> USART1_RX
        PA9     ------> USART1_TX
        */
        HAL_GPIO_DeInit(GPIOB, GPIO_PIN_7);

        HAL_GPIO_DeInit(GPIOA, GPIO_PIN_9);
    }
    else if (uartHandle->Instance == USART6)
    {
        /* Peripheral clock disable */
        __HAL_RCC_USART6_CLK_DISABLE();

        /**USART6 GPIO Configuration
        PC7     ------> USART6_RX
        PC6     ------> USART6_TX
        */
        HAL_GPIO_DeInit(GPIOC, GPIO_PIN_7 | GPIO_PIN_6);
    }
}

int 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_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_UART6
    uart = &uart6;
    uart->UartHandle.Instance = USART6;
    uart->irq = USART6_IRQn;
    serial6.ops    = &drv_uart_ops;
    serial6.config = config;
    /* register UART6 device */
    rt_hw_serial_register(&serial6, "uart6",
                          RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
                          uart);
#endif /* BSP_USING_UART6 */
#ifdef BSP_USING_UART7
    uart = &uart7;
    uart->UartHandle.Instance = UART7;
    uart->irq = UART7_IRQn;
    serial7.ops    = &drv_uart_ops;
    serial7.config = config;
    /* register UART7 device */
    rt_hw_serial_register(&serial7, "uart7",
                          RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
                          uart);
#endif /* BSP_USING_UART7 */
    return 0;
}
INIT_BOARD_EXPORT(hw_usart_init);