// Read data from eeprom.
BOOL I2C_ReadNByte(BYTE DevAddr, WORD Addr, BYTE* Buf, BYTE Len, BYTE I2cDevice)
{
BOOL Ack = FALSE;
#if (defined(FUNC_BREAK_POINT_EN) && (FUNC_RESTORE_DEVICE_SELECE == FUNC_RESTORE_DEVICE_EEPROM))
if(((gSys.SystemMode == SYS_MODE_USB) || (gSys.SystemMode == SYS_MODE_SD)) && (I2cDevice == EEPROM_IIC))
{
#if (I2C_PIN_CONFIGURE == SDIO_TO_A3A4A5)
SET_CARD_TO_A3A4A5();
#if defined(SD_DETECT_PIN_USE_A4)
ClrGpioRegBit(CARD_DETECT_PORT_PD, CARD_DETECT_BIT);
#endif
#endif
//写E2PROM时快速响应需要读卡时需要重新将复用IO设置回总线模式
SongPlayDo();
#if (I2C_PIN_CONFIGURE == SDIO_TO_A3A4A5)
#if defined(SD_DETECT_PIN_USE_A4)
SetGpioRegBit(CARD_DETECT_PORT_PD, CARD_DETECT_BIT);
#endif
SET_CARD_NOT_TO_GPIO();
#endif
}
#endif
Ack = I2C_SendAddr(DevAddr, Addr, IIC_READ, I2cDevice);
if(Ack == TRUE)
{
Ack = I2C_ReadBytes(Buf, Len, I2cDevice);
}
I2C_Stop(I2cDevice);
return Ack;
}
byte I2C_ReadRegister1(uint16_t deviceRegister)
{
byte data = 0;
byte status;
status=I2C_Start();
status=I2C_SendAddr(AT256); // send device bus address
status=I2C_Write(deviceRegister>>8); //parte alta
status=I2C_Write(deviceRegister); // parte baja
status=I2C_Start();
status=I2C_SendAddr(AT256+READ); // restart as a read operation
data = I2C_ReadNACK(); // read the register data
I2C_Stop(); // stop
while(TWCR & (1<<TWSTO));
return data;
}
void I2C_WriteRegister1(uint16_t deviceRegister, byte data)
{
byte status;
status=I2C_Start();
status=I2C_SendAddr(AT256); // send bus address
status=I2C_Write(deviceRegister>>8); // set register pointer
status=I2C_Write(deviceRegister); // set register pointer
status=I2C_Write(data); // second byte = data for device register
I2C_Stop();
_delay_ms(10);
}
