stm32G0 SPI EEPROM 读写代码

STM32G0的SPI EEPROM（电可擦除只读存储器）的读写操作通常涉及到硬件配置、初始化SPI通信以及编写控制寄存器的代码。以下是一个简化的示例，使用Keil MDK编译器和STM32Cube库：

#include "stm32g0xx_hal.h"
#include "stm32g0xx_ll_spi.h"

// 假设你已经定义了SPIx和EEPROXxx寄存器
SPI_HandleTypeDef SpiHandle;
EEPROXxxTypeDef EepromHandle;

void SpiEepromInit(void)
{
    // 初始化SPI
    SpiHandle.Instance = SPIx;
    SpiHandle.Init.Mode = SPI_MODE_MASTER; // 设置为主模式
    SpiHandle.Init.Direction = SPI_DIRECTION_2LINES; // 双线模式
    SpiHandle.Init.DataSize = SPI_DATASIZE_8BIT; // 8位数据传输
    SpiHandle.Init.CLKPolarity = SPI_POLARITY_LOW; // 钟控信号低电平有效
    SpiHandle.Init.CLKPhase = SPI_PHASE_1EDGE; // 钟控信号上升沿采样数据
    SpiHandle.Init.CRCPolynomial = 7; // CRC校验用7阶多项式
    HAL SpiConfig(&SpiHandle);

    // 开启SPI
    HAL SpiOpen(&SpiHandle);
}

void SpiEepromWrite(uint16_t Address, uint8_t *Data, uint16_t Length)
{
    // 写入前确保地址正确并且长度合理
    LL_EEPROM_WriteReg(EepromHandle, Address, Data, Length); // 使用LL库函数写入EEPROM
}

uint8_t SpiEepromRead(uint16_t Address, uint8_t *Buffer, uint16_t Length)
{
    // 读取数据
    return LL_EEPROM_ReadReg(EepromHandle, Address, Buffer, Length); // 返回读取的数据
}

// 示例：写入和读回一个字节
void exampleOperation(void)
{
    SpiEepromInit();
    uint8_t data_to_write = 0x42; // 写入数据
    SpiEepromWrite(0x00, &data_to_write, sizeof(data_to_write)); // 写入地址0x00
    uint8_t read_data;
    SpiEepromRead(0x00, read_data, sizeof(read_data)); // 读取并检查
    if (read_data == data_to_write)
        printf("Write and Read operation successful.\n");
    else
        printf("Data mismatch.\n");

    // 关闭SPI
    HAL SpiClose(&SpiHandle);
}