STM32数据收发功能实现
时间: 2023-09-28 19:04:48 浏览: 33
STM32提供了多种数据收发的方式,可以根据具体的需求选择不同的方法。
1. 串口通信
STM32内置了多个USART串口,可以通过配置串口的参数实现数据的收发。例如,使用USART1进行数据的收发可以按照以下步骤进行:
(1)使能USART1时钟:RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
(2)配置USART1的通信参数:USART_InitTypeDef USART_InitStructure; USART_InitStructure.USART_BaudRate = 115200; 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(USART1, &USART_InitStructure);
(3)使能USART1:USART_Cmd(USART1, ENABLE);
(4)发送数据:USART_SendData(USART1, data);
(5)接收数据:data = USART_ReceiveData(USART1);
2. SPI通信
STM32内置了多个SPI接口,可以通过配置SPI的参数实现数据的收发。例如,使用SPI1进行数据的收发可以按照以下步骤进行:
(1)使能SPI1时钟:RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
(2)配置SPI1的通信参数:SPI_InitTypeDef SPI_InitStructure; SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; SPI_InitStructure.SPI_Mode = SPI_Mode_Master; SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; SPI_InitStructure.SPI_CRCPolynomial = 7; SPI_Init(SPI1, &SPI_InitStructure);
(3)使能SPI1:SPI_Cmd(SPI1, ENABLE);
(4)发送数据:SPI_I2S_SendData(SPI1, data);
(5)接收数据:data = SPI_I2S_ReceiveData(SPI1);
3. I2C通信
STM32内置了多个I2C接口,可以通过配置I2C的参数实现数据的收发。例如,使用I2C1进行数据的收发可以按照以下步骤进行:
(1)使能I2C1时钟:RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
(2)配置I2C1的通信参数:I2C_InitTypeDef I2C_InitStructure; I2C_InitStructure.I2C_Mode = I2C_Mode_I2C; I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2; I2C_InitStructure.I2C_OwnAddress1 = 0x00; I2C_InitStructure.I2C_Ack = I2C_Ack_Enable; I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit; I2C_InitStructure.I2C_ClockSpeed = 100000; I2C_Init(I2C1, &I2C_InitStructure);
(3)使能I2C1:I2C_Cmd(I2C1, ENABLE);
(4)发送数据:I2C_SendData(I2C1, data);
(5)接收数据:data = I2C_ReceiveData(I2C1);
以上是三种常用的数据收发方式,具体的实现方式需要根据具体的应用场景进行选择。