STM32硬件SPI的实现过程

Posted 2021-06-29 studying~

SPI相关库函数：

void SPI_I2S_DeInit(SPI_TypeDef* SPIx);
void SPI_Init(SPI_TypeDef* SPIx, SPI_InitTypeDef* SPI_InitStruct);
void SPI_Cmd(SPI_TypeDef* SPIx, FunctionalState NewState);
void SPI_I2S_ITConfig(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT, FunctionalState NewState);
void SPI_I2S_DMACmd(SPI_TypeDef* SPIx, uint16_t SPI_I2S_DMAReq, FunctionalState NewState);
void SPI_I2S_SendData(SPI_TypeDef* SPIx, uint16_t Data);
uint16_t SPI_I2S_ReceiveData(SPI_TypeDef* SPIx);
void SPI_DataSizeConfig(SPI_TypeDef* SPIx, uint16_t SPI_DataSize);

FlagStatus SPI_I2S_GetFlagStatus(SPI_TypeDef* SPIx, uint16_t SPI_I2S_FLAG);
void SPI_I2S_ClearFlag(SPI_TypeDef* SPIx, uint16_t SPI_I2S_FLyinAG);
ITStatus SPI_I2S_GetITStatus(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT);
void SPI_I2S_ClearITPendingBit(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT);

程序配置过程：

①配置相关引脚的复用功能，使能SPIx时钟
void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct);
②初始化SPIx,设置SPIx工作模式
void SPI_Init(SPI_TypeDef* SPIx, SPI_InitTypeDef* SPI_InitStruct);
③使能SPIx
void SPI_Cmd(SPI_TypeDef* SPIx, FunctionalState NewState);
④SPI传输数据
void SPI_I2S_SendData(SPI_TypeDef* SPIx, uint16_t Data);
uint16_t SPI_I2S_ReceiveData(SPI_TypeDef* SPIx) ;
⑤查看SPI传输状态
SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE)