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请问一下如何对STM32L151C8T6的串口进行配置呢

1036 GPIO

问答对人有帮助，内容完整，我也想知道答案 0 请问一下如何对STM32L151C8T6的串口进行配置呢？如何去完成求程序呢？ 0
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答案对人有帮助，有参考价值 0 *STM32L151C8T6的串口配置 // //加入以下代码,支持printf函数,而不需要选择use MicroLIB #if 1 #pragma import(__use_no_semihosting) //标准库需要的支持函数 struct __FILE { int handle; }; FILE __stdout; //定义_sys_exit()以避免使用半主机模式 _sys_exit(int x) { x = x; } //重定义fputc函数 int fputc(int ch, FILE f) { uint16_t CNT=0; while((USART1->SR&0X40)==0)//循环发送,直到发送完毕 { if((CNT++)>60000)//防止异常超时退出 { break; } } USART1->DR = (u8) ch; return ch; } #endif /** * @brief Uart Init program * @param1 USARTx:USART1 USARTUSART2 USART3 * @param2 bound: USARTx Baud Rate * @retval None / void My_USARTx_Config(USART_TypeDef USARTx,uint32_t bound) { //GPIO端口设置 GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; My_Struct_Clear(USART_InitStructure); My_Struct_Clear(NVIC_InitStructure); /* Enable the USARTx Pins Software Remapping / if(USARTx == USART1) { My_Struct_Clear(UART1_Parameter); RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE); } else if(USARTx == USART2) { My_Struct_Clear(UART2_Parameter); RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE); } else if(USARTx == USART3) { My_Struct_Clear(UART3_Parameter); RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE); RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE); } if(USARTx == USART1) { / Configure USART1 Rx (PA.10) as input floating / My_Struct_Clear(GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_OType = GPIO_OType_OD; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(GPIOA, &GPIO_InitStructure); / Configure USART1 Tx (PA.09) as alternate function push-pull / My_Struct_Clear(GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOA, &GPIO_InitStructure); } else if(USARTx == USART2) { / Configure USART2 Rx (PA.03) as input floating / My_Struct_Clear(GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_OType = GPIO_OType_OD; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(GPIOA, &GPIO_InitStructure); / Configure USART2 Tx (PA.02) as alternate function push-pull / My_Struct_Clear(GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOA, &GPIO_InitStructure); } else if(USARTx == USART3) { / Configure USART3 Rx (PB.11) as input floating / My_Struct_Clear(GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_OType = GPIO_OType_OD; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(GPIOB, &GPIO_InitStructure); / Configure USART3 Tx (PB.10) as alternate function push-pull / My_Struct_Clear(GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOB, &GPIO_InitStructure); } / Enable the USARTx Interrupt / if(USARTx == USART1) { NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; } else if(USARTx == USART2) { NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; } else if(USARTx == USART3) { NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn; } NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); USART_InitStructure.USART_BaudRate = bound; USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStructure.USART_Mode = USART_Mode_Rx \| USART_Mode_Tx; USART_Init(USARTx, &USART_InitStructure); / Enable USARTx / USART_Cmd(USARTx, ENABLE); USART_ITConfig(USARTx, USART_IT_RXNE,DISABLE); USART_ITConfig(USARTx, USART_IT_TXE,DISABLE); if(USARTx == USART1) { GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART1); GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_USART1); } else if(USARTx == USART2) { GPIO_PinAFConfig(GPIOA,GPIO_PinSource2,GPIO_AF_USART2); GPIO_PinAFConfig(GPIOA,GPIO_PinSource3,GPIO_AF_USART2); } else if(USARTx == USART3) { GPIO_PinAFConfig(GPIOB,GPIO_PinSource10,GPIO_AF_USART3); GPIO_PinAFConfig(GPIOB,GPIO_PinSource11,GPIO_AF_USART3); } } /* * @brief USRATx transmit transmit datas or string * @param1 USARTx:USART1 USARTUSART2 USART3 * @param2 Str: Data Addr * @retval None / void USARTx_SendString(USART_TypeDef USARTx,char * str) { uint16_t CNT=0; while(str != '')// && str != 'n' { USARTx->DR = (u8) str++; while((USARTx->SR&0X40)==0)//循环发送,直到发送完毕 { if((CNT++)>60000) { break; } } } } /* * @brief USRATx transmit transmit datas or string * @param1 USARTx:USART1 USARTUSART2 USART3 * @param2 Str: Data Addr * @param3 StrLength: Data Length * @retval None / void USARTx_printf(USART_TypeDef USARTx,const char fmt,...) { va_list ap; char string[256]; My_Struct_Clear(string); va_start(ap,fmt); vsprintf(string,fmt,ap);//此处也可以使用sprintf函数，用法差不多，稍加修改即可，此处略去 USARTx_SendString(USARTx,string); va_end(ap); }*

2021-12-6 14:00:40 评论举报孟佳