STM32F103C8T6的SPI1的配置然后加SPI1的读函数和SPI1的写函数
时间: 2024-05-15 09:12:34 浏览: 141
以下是STM32F103C8T6的SPI1配置代码,包括时钟使能、GPIO初始化、SPI初始化等:
```c
#include "stm32f10x.h"
void SPI1_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
// 使能SPI1时钟和GPIO时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1 | RCC_APB2Periph_GPIOA, ENABLE);
// 配置GPIO口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// 配置SPI1
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);
// 使能SPI1
SPI_Cmd(SPI1, ENABLE);
}
uint8_t SPI1_ReadByte(void)
{
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
return SPI_I2S_ReceiveData(SPI1);
}
void SPI1_WriteByte(uint8_t data)
{
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
SPI_I2S_SendData(SPI1, data);
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);
}
```
其中,SPI1_Init()函数用于初始化SPI1,SPI1_ReadByte()函数用于从SPI1接收数据,SPI1_WriteByte()函数用于向SPI1发送数据。需要注意的是,这里的SPI1是主机模式。如果需要使用从机模式,需要在SPI_InitTypeDef结构体中设置SPI_Mode为SPI_Mode_Slave,并在从机设备上配置NSS引脚。
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