300 lines
8.5 KiB
C
300 lines
8.5 KiB
C
/*
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* File : drv_usart.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2015, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2017-08-25 LongfeiMa the first version for stm32h7xx
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*/
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#include "stm32h7xx.h"
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#include "drv_usart.h"
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#include "board.h"
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#include <rtdevice.h>
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/* Definition for USART1 clock resources */
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#define USART1_CLK_ENABLE() __USART1_CLK_ENABLE()
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#define USART1_RX_GPIO_CLK_ENABLE() __GPIOB_CLK_ENABLE()
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#define USART1_TX_GPIO_CLK_ENABLE() __GPIOA_CLK_ENABLE()
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#define USART1_FORCE_RESET() __USART1_FORCE_RESET()
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#define USART1_RELEASE_RESET() __USART1_RELEASE_RESET()
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/* Definition for USARTx Pins */
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#define USART1_TX_PIN GPIO_PIN_9
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#define USART1_TX_GPIO_PORT GPIOA
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#define USART1_TX_AF GPIO_AF7_USART1
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#define USART1_RX_PIN GPIO_PIN_7
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#define USART1_RX_GPIO_PORT GPIOB
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#define USART1_RX_AF GPIO_AF7_USART1
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/* STM32 uart driver */
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struct stm32_uart
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{
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UART_HandleTypeDef UartHandle;
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IRQn_Type irq;
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};
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static rt_err_t stm32_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
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{
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struct stm32_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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RT_ASSERT(cfg != RT_NULL);
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uart = (struct stm32_uart *)serial->parent.user_data;
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uart->UartHandle.Init.BaudRate = cfg->baud_rate;
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uart->UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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uart->UartHandle.Init.Mode = UART_MODE_TX_RX;
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uart->UartHandle.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
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switch (cfg->data_bits)
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{
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case DATA_BITS_7:
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uart->UartHandle.Init.WordLength = UART_WORDLENGTH_7B;
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break;
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case DATA_BITS_8:
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uart->UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
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break;
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case DATA_BITS_9:
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uart->UartHandle.Init.WordLength = UART_WORDLENGTH_9B;
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break;
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default:
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uart->UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
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break;
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}
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switch (cfg->stop_bits)
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{
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case STOP_BITS_1:
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uart->UartHandle.Init.StopBits = UART_STOPBITS_1;
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break;
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case STOP_BITS_2:
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uart->UartHandle.Init.StopBits = UART_STOPBITS_2;
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break;
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default:
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uart->UartHandle.Init.StopBits = UART_STOPBITS_1;
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break;
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}
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switch (cfg->parity)
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{
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case PARITY_NONE:
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uart->UartHandle.Init.Parity = UART_PARITY_NONE;
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break;
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case PARITY_ODD:
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uart->UartHandle.Init.Parity = UART_PARITY_ODD;
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break;
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case PARITY_EVEN:
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uart->UartHandle.Init.Parity = UART_PARITY_EVEN;
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break;
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default:
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uart->UartHandle.Init.Parity = UART_PARITY_NONE;
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break;
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}
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if (HAL_UART_DeInit(&uart->UartHandle) != HAL_OK)
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{
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return RT_ERROR;
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}
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if (HAL_UART_Init(&uart->UartHandle) != HAL_OK)
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{
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return RT_ERROR;
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}
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return RT_EOK;
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}
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static rt_err_t stm32_control(struct rt_serial_device *serial, int cmd, void *arg)
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{
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struct stm32_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct stm32_uart *)serial->parent.user_data;
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switch (cmd)
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{
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case RT_DEVICE_CTRL_CLR_INT:
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/* disable rx irq */
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UART_DISABLE_IRQ(uart->irq);
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/* disable interrupt */
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__HAL_UART_DISABLE_IT(&uart->UartHandle, UART_IT_RXNE);
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break;
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case RT_DEVICE_CTRL_SET_INT:
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/* enable rx irq */
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UART_ENABLE_IRQ(uart->irq);
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/* enable interrupt */
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__HAL_UART_ENABLE_IT(&uart->UartHandle, UART_IT_RXNE);
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break;
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}
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return RT_EOK;
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}
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static int stm32_putc(struct rt_serial_device *serial, char c)
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{
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struct stm32_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct stm32_uart *)serial->parent.user_data;
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while (!(uart->UartHandle.Instance->ISR & UART_FLAG_TXE));
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uart->UartHandle.Instance->TDR = c;
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return 1;
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}
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static int stm32_getc(struct rt_serial_device *serial)
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{
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int ch;
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struct stm32_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct stm32_uart *)serial->parent.user_data;
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ch = -1;
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if (uart->UartHandle.Instance->ISR & UART_FLAG_RXNE)
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{
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ch = uart->UartHandle.Instance->RDR & 0xff;
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}
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return ch;
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}
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static const struct rt_uart_ops stm32_uart_ops =
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{
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stm32_configure,
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stm32_control,
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stm32_putc,
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stm32_getc,
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};
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#if defined(RT_USING_UART1)
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/* UART1 device driver structure */
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static struct stm32_uart uart1;
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struct rt_serial_device serial1;
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void USART1_IRQHandler(void)
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{
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struct stm32_uart *uart;
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uart = &uart1;
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/* enter interrupt */
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rt_interrupt_enter();
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/* UART in mode Receiver ---------------------------------------------------*/
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if ((__HAL_UART_GET_IT(&uart->UartHandle, UART_IT_RXNE) != RESET) && (__HAL_UART_GET_IT_SOURCE(&uart->UartHandle, UART_IT_RXNE) != RESET))
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{
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rt_hw_serial_isr(&serial1, RT_SERIAL_EVENT_RX_IND);
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/* Clear RXNE interrupt flag */
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__HAL_UART_SEND_REQ(&uart->UartHandle, UART_RXDATA_FLUSH_REQUEST);
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}
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif /* RT_USING_UART1 */
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/**
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* @brief UART MSP Initialization
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* This function configures the hardware resources used in this example:
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* - Peripheral's clock enable
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* - Peripheral's GPIO Configuration
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* - NVIC configuration for UART interrupt request enable
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* @param huart: UART handle pointer
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* @retval None
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*/
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void HAL_UART_MspInit(UART_HandleTypeDef *huart)
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{
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GPIO_InitTypeDef GPIO_InitStruct;
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if (huart->Instance == USART1)
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{
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/* Enable GPIO TX/RX clock */
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USART1_TX_GPIO_CLK_ENABLE();
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USART1_RX_GPIO_CLK_ENABLE();
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/* Enable USARTx clock */
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USART1_CLK_ENABLE();
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/* UART TX GPIO pin configuration */
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GPIO_InitStruct.Pin = USART1_TX_PIN;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
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GPIO_InitStruct.Alternate = USART1_TX_AF;
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HAL_GPIO_Init(USART1_TX_GPIO_PORT, &GPIO_InitStruct);
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/* UART RX GPIO pin configuration */
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GPIO_InitStruct.Pin = USART1_RX_PIN;
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GPIO_InitStruct.Alternate = USART1_RX_AF;
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HAL_GPIO_Init(USART1_RX_GPIO_PORT, &GPIO_InitStruct);
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/* NVIC for USART */
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HAL_NVIC_SetPriority(USART1_IRQn, 0, 1);
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HAL_NVIC_EnableIRQ(USART1_IRQn);
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}
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}
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/**
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* @brief UART MSP De-Initialization
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* This function frees the hardware resources used in this example:
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* - Disable the Peripheral's clock
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* - Revert GPIO and NVIC configuration to their default state
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* @param huart: UART handle pointer
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* @retval None
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*/
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void HAL_UART_MspDeInit(UART_HandleTypeDef *huart)
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{
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if (huart->Instance == USART1)
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{
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/* Reset peripherals */
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USART1_FORCE_RESET();
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USART1_RELEASE_RESET();
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/* Disable peripherals and GPIO Clocks */
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/* Configure UART Tx as alternate function */
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HAL_GPIO_DeInit(USART1_TX_GPIO_PORT, USART1_TX_PIN);
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/* Configure UART Rx as alternate function */
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HAL_GPIO_DeInit(USART1_RX_GPIO_PORT, USART1_RX_PIN);
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/* Disable the NVIC for UART */
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HAL_NVIC_DisableIRQ(USART1_IRQn);
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}
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}
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int stm32_hw_usart_init(void)
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{
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struct stm32_uart *uart;
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struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
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#ifdef RT_USING_UART1
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uart = &uart1;
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uart->UartHandle.Instance = USART1;
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serial1.ops = &stm32_uart_ops;
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serial1.config = config;
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/* register UART1 device */
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rt_hw_serial_register(&serial1, "uart1",
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
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uart);
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#endif /* RT_USING_UART1 */
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return 0;
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}
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INIT_BOARD_EXPORT(stm32_hw_usart_init);
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