帮我写stm32f103zet6开发板的spi通信实验

好的，关于stm32f103zet6开发板的spi通信实验，以下是一个可能的代码实现：

#include "stm32f10x.h"

GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;

void SPI_Configuration(void)
{
  /* 配置SPI端口 */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_7;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* 配置SPI通信参数 */
  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_High;
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_InitStructure.SPI_CRCPolynomial = 7;
  SPI_Init(SPI1, &SPI_InitStructure);

  SPI_Cmd(SPI1, ENABLE);
}

uint8_t SPI_WriteReadByte(SPI_TypeDef* SPIx, uint8_t data)
{
  while (SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_TXE) == RESET);
  SPI_I2S_SendData(SPIx, data);
  while (SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_RXNE) == RESET);
  return SPI_I2S_ReceiveData(SPIx);
}

int main(void)
{
  /* 初始化SPI */
  SPI_Configuration();

  /* 发送并接收数据 */
  uint8_t tx_data = 0xAA;
  uint8_t rx_data = SPI_WriteReadByte(SPI1, tx_data);

  /* 关闭SPI */
  SPI_Cmd(SPI1, DISABLE);

  while (1);
}

这个代码片段实现了SPI1在PA5（SCK）、PA6（MISO）和PA7（MOSI）上的传输，并通过SPI_WriteReadByte函数实现了数据的发送和接收。注意在调用SPI_WriteReadByte函数之前，需要先让tx_data变量储存需要发送的数据。如果需要发送多个字节，可以在main函数中使用for循环。