IIC总线操作EEPROM存储模块AT24C02

只看该作者 · 2023-11-21 20:23

/**
* @brief AT24C02初始化
*
*/
void AT24C02_Init(void)
{
  IIC_Init();  // 初始化IIC总线
}

/**
* @brief AT24C02字节写入
*
* @param Address: 字节地址
* @param Data: 待写入的数据
*/
void AT24C02_ByteWrite(uint8_t Address, uint8_t Data)
{
  IIC_StartSignal();       // 发送开始信号

  // 发送设备地址，写操作
  IIC_SendBytes(0xA0);
  if (IIC_WaitACK() == 1) // AT24C02没应答
  {
printf("[AT24C02] Answered the device address: Error\n");
IIC_StopSignal();    // 发送停止信号
  }
  else
  {
printf("[AT24C02] Answered the device address: OK\n");
  }

  // 发送字地址
  IIC_SendBytes(Address);
  if (IIC_WaitACK() == 1) // AT24C02没应答
  {
printf("[AT24C02] Answered the word address: Error\n");
IIC_StopSignal();    // 发送停止信号
  }
  else
  {
printf("[AT24C02] Answered the word address: OK\n");
  }

  // 发送待写入的数据
  IIC_SendBytes(Data);
  if (IIC_WaitACK() == 1) // AT24C02没应答
  {
printf("[AT24C02] Answered the data: Error\n");
IIC_StopSignal();    // 发送停止信号
  }
  else
  {
printf("[AT24C02] Answered the data: OK\n");
  }

  IIC_StopSignal();       // 发送停止信号
}

/**
* @brief AT24C02页编程（8字节/页）
*
* @param Address: 页地址
* @param buf: 待写入的数据
* @param DataLen: 待写入的数据长度
*/
void AT24C02_PageWrite(uint32_t Address, uint8_t *buf, uint8_t DataLen)
{
  IIC_StartSignal();       // 发送开始信号

  // 发送设备地址，写操作
  IIC_SendBytes(0xA0);
  if (IIC_WaitACK() == 1) // AT24C02没应答
  {
printf("[AT24C02] Answered the device address: Error\n");
IIC_StopSignal();    // 发送停止信号
  }
  else
  {
printf("[AT24C02] Answered the device address: OK\n");
  }

  // 发送页地址
  IIC_SendBytes(Address);
  if (IIC_WaitACK() == 1) // AT24C02没应答
  {
printf("[AT24C02] Answered the page address: Error\n");
IIC_StopSignal();    // 发送停止信号
  }
  else
  {
printf("[AT24C02] Answered the page address: OK\n");
  }

  // 循环发送数据
  while (DataLen--)
  {
IIC_SendBytes(*buf++);  // 发送数据
if (IIC_WaitACK() == 1) // AT24C02没应答
{
   printf("[AT24C02] Answered the data: Error\n");
   IIC_StopSignal();    // 发送停止信号
}
else
{
   printf("[AT24C02] Answered the data: OK\n");
}
  }

  IIC_StopSignal();       // 发送停止信号
}

/**
* @brief AT24C02当前地址读
*
* @return uint8_t 当前地址的数据
*/
uint8_t AT24C02_CurrentAddressRead(void)
{
  uint8_t Data;

  IIC_StartSignal(); // 发送开始信号

  // 发送设备地址，读操作
  IIC_SendBytes(0xA1);
  if (IIC_WaitACK() == 1) // AT24C02没应答
  {
printf("[AT24C02] Answered the device address: Error\n");
IIC_StopSignal();    // 发送停止信号
  }
  else
  {
printf("[AT24C02] Answered the device address: OK\n");
  }

  // 读取1字节数据
  Data = IIC_ReadBytes();

  // 发送应答信号
  IIC_MasterACK(1); // 不应答

  IIC_StopSignal(); // 发送停止信号
  return Data;    // 返回接收到的数据
}

uint8_t data;

AT24C02_Init()

AT24C02_PageWrite(0x00, "0123456", 6);
HAL_Delay(100);

AT24C02_ByteWrite(0x07, '7');
HAL_Delay(100);

data = AT24C02_CurrentAddressRead();
printf("AT24C02_CurrentAddressRead: %c", data);