/**
@see DVBT_NIM_FP_GET_PARAMETERS
*/
s32
dvbt_nim_default_GetParameters(
DVBT_NIM_MODULE *pNim,
u64 *pRfFreqHz,
s32 *pBandwidthMode
)
{
TUNER_MODULE *pTuner;
DVBT_DEMOD_MODULE *pDemod;
// Get tuner module and demod module.
pTuner = pNim->pTuner;
pDemod = pNim->pDemod;
// Get tuner RF frequency in Hz.
if(pTuner->GetRfFreqHz(pTuner, pRfFreqHz) != FUNCTION_SUCCESS)
goto error_status_execute_function;
// Get demod bandwidth mode.
if(pDemod->GetBandwidthMode(pDemod, pBandwidthMode) != FUNCTION_SUCCESS)
goto error_status_execute_function;
return FUNCTION_SUCCESS;
error_status_execute_function:
return FUNCTION_ERROR;
}
UData_t
tuner_set_bw_normal(
handle_t tuner_handle,
handle_t demod_handle
)
{
DVBT_DEMOD_MODULE *pDemod;
int DemodBandwidthMode;
unsigned int TunerBandwidthHz;
unsigned int TargetTunerBandwidthHz;
// Get demod module.
pDemod = (DVBT_DEMOD_MODULE *)demod_handle;
// Get demod bandwidth mode.
if(pDemod->GetBandwidthMode(pDemod, &DemodBandwidthMode) != FUNCTION_SUCCESS)
goto error_status_execute_function;
// Determine tuner target bandwidth.
switch(DemodBandwidthMode)
{
case DVBT_BANDWIDTH_6MHZ: TargetTunerBandwidthHz = MT2266_BANDWIDTH_6MHZ; break;
case DVBT_BANDWIDTH_7MHZ: TargetTunerBandwidthHz = MT2266_BANDWIDTH_7MHZ; break;
default:
case DVBT_BANDWIDTH_8MHZ: TargetTunerBandwidthHz = MT2266_BANDWIDTH_8MHZ; break;
}
// Get tuner bandwidth.
if(MT_IS_ERROR(MT2266_GetParam(tuner_handle, MT2266_OUTPUT_BW, &TunerBandwidthHz)))
goto error_status_get_tuner_bandwidth;
// Set tuner bandwidth with normal setting according to demod bandwidth mode.
if(TunerBandwidthHz != TargetTunerBandwidthHz)
{
if(MT_IS_ERROR(MT2266_SetParam(tuner_handle, MT2266_OUTPUT_BW, TargetTunerBandwidthHz)))
goto error_status_set_tuner_bandwidth;
}
return MT_OK;
error_status_set_tuner_bandwidth:
error_status_get_tuner_bandwidth:
error_status_execute_function:
return MT_COMM_ERR;
}
UData_t
tuner_set_bw_narrow(
handle_t tuner_handle,
handle_t demod_handle
)
{
DVBT_DEMOD_MODULE *pDemod;
int DemodBandwidthMode;
unsigned long AciDetInd;
unsigned int TunerBandwidthHz;
unsigned int TargetTunerBandwidthHz;
// Get demod module.
pDemod = (DVBT_DEMOD_MODULE *)demod_handle;
// Get demod bandwidth mode.
if(pDemod->GetBandwidthMode(pDemod, &DemodBandwidthMode) != FUNCTION_SUCCESS)
goto error_status_execute_function;
// Get demod ACI_DET_IND.
if(pDemod->GetRegBitsWithPage(pDemod, DVBT_ACI_DET_IND, &AciDetInd) != FUNCTION_SUCCESS)
goto error_status_get_registers;
// Determine tuner target bandwidth according to ACI_DET_IND.
if(AciDetInd == 0x1)
{
// Choose narrow target bandwidth.
switch(DemodBandwidthMode)
{
case DVBT_BANDWIDTH_6MHZ: TargetTunerBandwidthHz = MT2266_BANDWIDTH_5MHZ; break;
case DVBT_BANDWIDTH_7MHZ: TargetTunerBandwidthHz = MT2266_BANDWIDTH_6MHZ; break;
default:
case DVBT_BANDWIDTH_8MHZ: TargetTunerBandwidthHz = MT2266_BANDWIDTH_7MHZ; break;
}
}
else
{
// Choose normal target bandwidth.
switch(DemodBandwidthMode)
{
case DVBT_BANDWIDTH_6MHZ: TargetTunerBandwidthHz = MT2266_BANDWIDTH_6MHZ; break;
case DVBT_BANDWIDTH_7MHZ: TargetTunerBandwidthHz = MT2266_BANDWIDTH_7MHZ; break;
default:
case DVBT_BANDWIDTH_8MHZ: TargetTunerBandwidthHz = MT2266_BANDWIDTH_8MHZ; break;
}
}
// Get tuner bandwidth.
if(MT_IS_ERROR(MT2266_GetParam(tuner_handle, MT2266_OUTPUT_BW, &TunerBandwidthHz)))
goto error_status_get_tuner_bandwidth;
// Set tuner bandwidth with normal setting according to demod bandwidth mode.
if(TunerBandwidthHz != TargetTunerBandwidthHz)
{
if(MT_IS_ERROR(MT2266_SetParam(tuner_handle, MT2266_OUTPUT_BW, TargetTunerBandwidthHz)))
goto error_status_set_tuner_bandwidth;
}
return MT_OK;
error_status_set_tuner_bandwidth:
error_status_get_tuner_bandwidth:
error_status_get_registers:
error_status_execute_function:
return MT_COMM_ERR;
}