stm32模拟IO读写AT24C02

/*
*@brief 主机向从机写多字节
*
*@param addr - 地址
*@param p_buf - 数据指针
*@param len - 待写入字节长度
*
*@return
*
*@note 每写一页需要延时5ms，保证数据正确写入。AT24C02一次最多写入8字节
*/
void EEP_I2C_Write_Multibytes(uint16_t addr,uint8_t *p_buf,uint16_t len)
{
uint16_t i;
EEP_I2C_Start();
I2C_Write_Byte(DEVICE_ADDRESS|((addr/256)<<1));
EEP_I2C_WaitAck();

I2C_Write_Byte(addr%256);
EEP_I2C_WaitAck();

for(i=0;i<len;i++)
{
I2C_Write_Byte(p_buf[i]);
EEP_I2C_WaitAck();
}
EEP_I2C_Stop();
// Delay_Ms(5);
}
/*
*@brief 读多字节（无法跨页）
*
*@param addr - 地址
*@param p_buf - 数据指针
*@param len - 待读取字节长度
*
*@return /
*
*@note /
*/
void EEP_I2C_Read_Multibytes(uint16_t addr,uint8_t *p_buf,uint16_t len)
{
uint16_t i;

EEP_I2C_Start();
I2C_Write_Byte(DEVICE_ADDRESS|((addr/256)<<1));
EEP_I2C_WaitAck();

I2C_Write_Byte(addr%256);
EEP_I2C_WaitAck();

EEP_I2C_Start();
I2C_Write_Byte(DEVICE_ADDRESS|((addr/256)<<1)|0x01);
EEP_I2C_WaitAck();

for(i=0;i<len;i++)
{
p_buf[i] = I2C_Read_Byte();
if(i==(len-1))
{
EEP_I2C_WriteNoAck();
}
else
{
EEP_I2C_WriteAck();
}
}
EEP_I2C_Stop();
}