110 lines
3.3 KiB
C
110 lines
3.3 KiB
C
/**
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******************************************************************************
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* @file bsp_RS232_USART.c
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* @author fire
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* @version V1.0
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* @date 2019-xx-xx
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* @brief 使用串口5 ，重定向c库printf函数到usart端口，中断接收模式
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******************************************************************************
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* @attention
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*
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* 实验平台:野火 STM32 H750 开发板
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* 论坛 :http://www.firebbs.cn
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* 淘宝 :http://firestm32.taobao.com
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*
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******************************************************************************
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*/
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#include "./usart/bsp_rs232_usart.h"
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UART_HandleTypeDef UartHandle;
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extern uint8_t ucTemp;
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/**
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* @brief RS232_USART GPIO 配置,工作模式配置。115200 8-N-1
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* @param 无
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* @retval 无
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*/
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void RS232_USART_Config(void)
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{
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GPIO_InitTypeDef GPIO_InitStruct;
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RCC_PeriphCLKInitTypeDef RCC_PeriphClkInit;
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RS232_USART_RX_GPIO_CLK_ENABLE();
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RS232_USART_TX_GPIO_CLK_ENABLE();
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/* 配置串口5时钟源*/
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RCC_PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_UARTx;
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RCC_PeriphClkInit.Usart234578ClockSelection = RCC_UARTxCLKSOURCE_SYSCLK;
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HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphClkInit);
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/* 使能 UART 时钟 */
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RS232_USART_CLK_ENABLE();
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/**USART2 GPIO Configuration
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PB13 ------> UART5_TX
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PB12 ------> UART5_RX
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*/
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/* 配置Tx引脚为复用功能 */
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GPIO_InitStruct.Pin = RS232_USART_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_HIGH;
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GPIO_InitStruct.Alternate = RS232_USART_TX_AF;
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HAL_GPIO_Init(RS232_USART_TX_GPIO_PORT, &GPIO_InitStruct);
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/* 配置Rx引脚为复用功能 */
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GPIO_InitStruct.Pin = RS232_USART_RX_PIN;
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GPIO_InitStruct.Alternate = RS232_USART_RX_AF;
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HAL_GPIO_Init(RS232_USART_RX_GPIO_PORT, &GPIO_InitStruct);
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/* 配置串RS232_USART 模式 */
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UartHandle.Instance = RS232_USART;
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UartHandle.Init.BaudRate = 115200;
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UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
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UartHandle.Init.StopBits = UART_STOPBITS_1;
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UartHandle.Init.Parity = UART_PARITY_NONE;
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UartHandle.Init.Mode = UART_MODE_TX_RX;
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UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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UartHandle.Init.OverSampling = UART_OVERSAMPLING_16;
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UartHandle.Init.OneBitSampling = UART_ONEBIT_SAMPLING_DISABLED;
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UartHandle.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
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HAL_UART_Init(&UartHandle);
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/*串口中断初始化 */
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HAL_NVIC_SetPriority(RS232_USART_IRQ, 0, 0);
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HAL_NVIC_EnableIRQ(RS232_USART_IRQ);
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/*配置串口接收中断 */
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__HAL_UART_ENABLE_IT(&UartHandle,UART_IT_RXNE);
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}
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/***************** 发送字符串 **********************/
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void Usart_SendString(uint8_t *str)
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{
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unsigned int k=0;
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do
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{
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HAL_UART_Transmit( &UartHandle,(uint8_t *)(str + k) ,1,1000);
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k++;
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} while(*(str + k)!='\0');
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}
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///重定向c库函数printf到串口RS232_USART，重定向后可使用printf函数
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int fputc(int ch, FILE *f)
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{
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/* 发送一个字节数据到串口RS232_USART */
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HAL_UART_Transmit(&UartHandle, (uint8_t *)&ch, 1, 1000);
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return (ch);
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}
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///重定向c库函数scanf到串口RS232_USART，重写向后可使用scanf、getchar等函数
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int fgetc(FILE *f)
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{
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int ch;
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HAL_UART_Receive(&UartHandle, (uint8_t *)&ch, 1, 1000);
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return (ch);
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}
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/*********************************************END OF FILE**********************/
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