//UINT32 MxL_I2C_Read(UINT8 DeviceAddr, UINT8 Addr, UINT8* mData)
UINT32 MxL_I2C_Read(MxL5007_TunerConfigS* myTuner, UINT8 Addr, UINT8* mData)
{
TUNER_MODULE *pTuner;
I2C_BRIDGE_MODULE *pI2cBridge;
unsigned char DeviceAddr;
unsigned char Buffer[LEN_2_BYTE];
// Get tuner module and I2C bridge.
pTuner = myTuner->pTuner;
pI2cBridge = pTuner->pI2cBridge;
// Get tuner device address.
pTuner->GetDeviceAddr(pTuner, &DeviceAddr);
// Set tuner register reading address.
// Note: The I2C format of tuner register reading address setting is as follows:
// start_bit + (DeviceAddr | writing_bit) + 0xfb + RegReadingAddr + stop_bit
Buffer[0] = (unsigned char)MXL5007T_I2C_READING_CONST;
Buffer[1] = (unsigned char)Addr;
if(pI2cBridge->ForwardI2cWritingCmd(pI2cBridge, DeviceAddr, Buffer, LEN_2_BYTE) != FUNCTION_SUCCESS)
goto error_status_set_tuner_register_reading_address;
// Get tuner register bytes.
// Note: The I2C format of tuner register byte getting is as follows:
// start_bit + (DeviceAddr | reading_bit) + reading_byte + stop_bit
if(pI2cBridge->ForwardI2cReadingCmd(pI2cBridge, DeviceAddr, Buffer, LEN_1_BYTE) != FUNCTION_SUCCESS)
goto error_status_get_tuner_registers;
*mData = (UINT8)Buffer[0];
return MxL_OK;
error_status_get_tuner_registers:
error_status_set_tuner_register_reading_address:
return MxL_ERR_OTHERS;
}
//UINT32 MxL_I2C_Write(UINT8 DeviceAddr, UINT8* pArray, UINT32 count)
UINT32 MxL_I2C_Write(MxL5007_TunerConfigS* myTuner, UINT8* pArray, UINT32 count)
{
TUNER_MODULE *pTuner;
BASE_INTERFACE_MODULE *pBaseInterface;
I2C_BRIDGE_MODULE *pI2cBridge;
unsigned char DeviceAddr;
unsigned long WritingByteNumMax;
unsigned long i;
unsigned char Buffer[I2C_BUFFER_LEN];
unsigned long WritingIndex;
unsigned char *pData;
unsigned long DataLen;
// Get tuner module, base interface, and I2C bridge.
pTuner = myTuner->pTuner;
pBaseInterface = pTuner->pBaseInterface;
pI2cBridge = pTuner->pI2cBridge;
// Get tuner device address.
pTuner->GetDeviceAddr(pTuner, &DeviceAddr);
// Get writing byte and byte number.
pData = (unsigned char *)pArray;
DataLen = (unsigned long)count;
// Calculate MxL5007T maximum writing byte number.
// Note: MxL5007T maximum writing byte number must be a multiple of 2.
WritingByteNumMax = pBaseInterface->I2cWritingByteNumMax;
WritingByteNumMax = ((WritingByteNumMax % 2) == 0) ? WritingByteNumMax : (WritingByteNumMax - 1);
// Set register bytes.
// Note: The 2 kind of I2C formats of MxL5007T is described as follows:
// 1. start_bit + (device_addr | writing_bit) + (register_addr + writing_byte) * n + stop_bit
// ...
// start_bit + (device_addr | writing_bit) + (register_addr + writing_byte) * m + stop_bit
// 2. start_bit + (device_addr | writing_bit) + 0xff + stop_bit
for(i = 0, WritingIndex = 0; i < DataLen; i++, WritingIndex++)
{
// Put data into buffer.
Buffer[WritingIndex] = pData[i];
// If writing buffer is full or put data into buffer completely, send the I2C writing command with buffer.
if( (WritingIndex == (WritingByteNumMax - 1)) || (i == (DataLen - 1)) )
{
if(pI2cBridge->ForwardI2cWritingCmd(pI2cBridge, DeviceAddr, Buffer, (WritingIndex + LEN_1_BYTE)) != FUNCTION_SUCCESS)
goto error_status_set_tuner_registers;
WritingIndex = -1;
}
}
return MxL_OK;
error_status_set_tuner_registers:
return MxL_ERR_OTHERS;
}
