stm32f103c8t6使用max300102的C语言程序

要使用Max300102与STM32F103C8T6进行通信，需要使用SPI接口。以下是一个简单的C语言程序，可以读取Max300102的寄存器值：

#include "stm32f10x.h"

#define MAX300102_CS_PIN GPIO_Pin_4
#define MAX300102_CS_GPIO GPIOA

SPI_InitTypeDef SPI_InitStructure;

void MAX300102_SPI_init() {
  GPIO_InitTypeDef GPIO_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1, ENABLE);

  GPIO_InitStructure.GPIO_Pin = MAX300102_CS_PIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(MAX300102_CS_GPIO, &GPIO_InitStructure);

  GPIO_SetBits(MAX300102_CS_GPIO, MAX300102_CS_PIN);

  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_16;
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_Init(SPI1, &SPI_InitStructure);
  SPI_Cmd(SPI1, ENABLE);
}

uint8_t MAX300102_SPI_transfer(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_RXNE) == RESET);
  return SPI_I2S_ReceiveData(SPI1);
}

uint8_t MAX300102_read_register(uint8_t address) {
  GPIO_ResetBits(MAX300102_CS_GPIO, MAX300102_CS_PIN);
  MAX300102_SPI_transfer(0x80 | address);
  uint8_t data = MAX300102_SPI_transfer(0x00);
  GPIO_SetBits(MAX300102_CS_GPIO, MAX300102_CS_PIN);
  return data;
}

int main(void) {
  MAX300102_SPI_init();
  uint8_t reg_value = MAX300102_read_register(0x01);
  return 0;
}

这个程序初始化了SPI接口，并且提供了一个函数来读取Max300102的寄存器值。在`main()`函数中，我们使用了`MAX300102_read_register()`函数来读取地址为0x01的寄存器值，并将其存储在`reg_value`变量中。请注意，这里的CS引脚是在GPIOA的第4个引脚上，你需要根据实际情况进行修改。