/*****************************************************************************
**
** Name: MT_ReadSub
**
** Description: Read values from device using a two-wire serial bus.
**
** Parameters: handle - User-specific I/O parameter that was
** passed to tuner's Open function.
** addr - device serial bus address (value passed
** as parameter to MTxxxx_Open)
** subAddress - serial bus sub-address (Register Address)
** data - pointer to the Data to be written to the
** device
** cnt - number of bytes/registers to be written
**
** Returns: status:
** MT_OK - No errors
** MT_COMM_ERR - Serial bus communications error
** user-defined
**
** Notes: This is a callback function that is called from the
** the tuning algorithm. You MUST provide code for this
** function to read data using the tuner's 2-wire serial
** bus.
**
** The handle parameter is a user-specific argument.
** If additional arguments are needed for the user's
** serial bus read/write functions, this argument can be
** used to supply the necessary information.
** The handle parameter is initialized in the tuner's Open
** function.
**
** Revision History:
**
** SCR Date Author Description
** -------------------------------------------------------------------------
** N/A 03-25-2004 DAD Original
**
*****************************************************************************/
UData_t MT2260_ReadSub(Handle_t handle,
UData_t addr,
U8Data subAddress,
U8Data *data,
UData_t cnt)
{
UData_t status = MT_OK; /* Status to be returned */
/*
** ToDo: Add code here to implement a serial-bus read
** operation to the MTxxxx tuner. If successful,
** return MT_OK.
*/
PUserData userData;
U8Data buffer[8];
U8Data i;
/*
** ToDo: Add code here to implement a serial-bus read
** operation to the MTxxxx tuner. If successful,
** return true.
*/
userData = (PUserData)handle;
for (i = 0; i < cnt; i++)
{
status = Standard_readTunerRegisters (userData->demodulator, userData->chip, subAddress + i, (U8Data)1, &buffer[0]);
if (status) goto exit;
*(data + i) = buffer[0];
}
exit:
return (status);
}
Dword Demodulator_readTunerRegisters (
IN Demodulator* demodulator,
IN Byte chip,
IN Word registerAddress,
IN Byte bufferLength,
IN Byte* buffer
) {
return (Standard_readTunerRegisters (demodulator, chip, registerAddress, bufferLength, buffer));
}
