/* Testing of SAR A/D Keypad Voltage Measurement */
int sar_test_keypad_voltage(void)
{
CSL_Status status;
CSL_SarHandleObj *SarHandle;
CSL_SarChSetup param;
int result;
int chanNo;
Uint16 readBuffer;
result = CSL_TEST_FAILED;
printf("Testing SAR in polling mode\n");
/* Initialize the SAR module */
status = SAR_init();
if(status != CSL_SOK)
{
printf("SAR Init Failed!!\n");
return(result);
}
/* Open SAR channel */
status = SAR_chanOpen(&SarObj,CSL_SAR_CHAN_3);
SarHandle = &SarObj;
if(status != CSL_SOK)
{
printf("SAR_chanOpen Failed!!\n");
return result;
}
/* Initialize channel */
status = SAR_chanInit(SarHandle);
if(status != CSL_SOK)
{
printf("SAR_chanInit Failed!!\n");
return(result);
}
param.OpMode = CSL_SAR_POLLING;
param.MultiCh = CSL_SAR_NO_DISCHARGE;
param.RefVoltage = CSL_SAR_REF_VIN;
param.SysClkDiv = 0x0b ;
/* Configuration for SAR module */
status = SAR_chanSetup(SarHandle,¶m);
if(status != CSL_SOK)
{
printf("SAR_chanConfig Failed!!\n");
return(result);
}
/* Set channel cycle set */
status = SAR_chanCycSet(SarHandle,CSL_SAR_CONTINUOUS_CONVERSION);
if(status != CSL_SOK)
{
printf("SAR_chanCycSet Failed!!\n");
return(result);
}
/* set ADC Measurement parameters */
status = SAR_A2DMeasParamSet(SarHandle,CSL_KEYPAD_MEAS,&chanNo);
if(status != CSL_SOK)
{
printf("SAR_A2DMeasParamSet Failed!!\n");
return(result);
}
printf("Channel Number selected %d\n",chanNo);
/* start the conversion */
status = SAR_startConversion(SarHandle);
if(status != CSL_SOK)
{
printf("SAR_startConversion Failed!!\n");
return(result);
}
i = 0;
/* Read the ADC data continously 40 times */
while(i < 40)
{
/* Check whether the ADC data is available or not */
while(CSL_SAR_DATA_AVAILABLE !=
SAR_getStatus(SarHandle,&status));
status = SAR_readData(SarHandle, &readBuffer);
if(status != CSL_SOK)
{
printf("SAR_readData Failed!!\n");
return(result);
}
i++;
printf("SAR ADC read data 0x%x\n",readBuffer);
}
/* Stop the conversion */
status = SAR_stopConversion(SarHandle);
if(status != CSL_SOK)
{
printf("SAR_stopConversion Failed!!\n");
return(result);
}
/* Close the channel */
status = SAR_chanClose(SarHandle);
if(status != CSL_SOK)
{
printf("SAR_chanClose Failed!!\n");
return(result);
}
/* Deinit */
status = SAR_deInit();
if(status != CSL_SOK)
{
printf("SAR_deInit Failed!!\n");
return(result);
}
result = CSL_TEST_PASSED;
return(result);
}
/* Initializes user interface */
Int16 userInterfaceInit(
Float32 cpuFreq,
Float32 pbnSampFreq,
CSL_Status *pCslStatus
)
{
CSL_SarChSetup SarParam;
CSL_SarChanSel sarChanNo;
CSL_Config hwConfig;
Uint32 tmrPrd;
CSL_Status status;
#ifdef PBN_SIM
PbnSimPrms pbnSimPrms;
#endif
#ifdef PBN_SIM
/* Initialize push-button network simulation */
pbnSimPrms.pbnSimLoop = TRUE;
PbnSimInit(&pbnSimPrms, &gPbnSimState);
#endif
/* Initialize SAR CSL */
SAR_init();
/* Populate SAR object information */
status = SAR_chanOpen(&gsSarObj, CSL_SAR_CHAN_3);
if (status != CSL_SOK)
{
*pCslStatus = status;
return UI_CSL_FAIL;
}
gsSarHandle = &gsSarObj;
/* Initialize SAR registers */
SarParam.SysClkDiv = (Uint16)((Float32)cpuFreq/SAR_MAX_CLK_FREQ + 0.5)-1;
SarParam.OpMode = CSL_SAR_POLLING;
SarParam.MultiCh = CSL_SAR_NO_DISCHARGE;
SarParam.RefVoltage = CSL_SAR_REF_VIN;
status = SAR_chanSetup(gsSarHandle, &SarParam);
if (status != CSL_SOK)
{
*pCslStatus = status;
return UI_CSL_FAIL;
}
/* Initialize A/D conversion type */
status = SAR_A2DMeasParamSet(gsSarHandle, CSL_KEYPAD_MEAS, &sarChanNo);
if ((status != CSL_SOK) || (sarChanNo != CSL_SAR_CHAN_3))
{
*pCslStatus = status;
return UI_CSL_FAIL;
}
/* Initialize A/D conversion type */
status = SAR_chanCycSet(gsSarHandle, CSL_SAR_SINGLE_CONVERSION);
if (status != CSL_SOK)
{
*pCslStatus = status;
return UI_CSL_FAIL;
}
/* Initialize UI control variables */
gPrevPbnState = UI_PUSH_BUTTON_NONE;
genHidReport(UI_PUSH_BUTTON_NONE, gHidReport);
gHidReportReady = FALSE;
/* Open GPT1 -- used as timer for SAR sampling for HID */
gsGptHandle = GPT_open(GPT_1, &gsGptObj, &status);
if (status != CSL_SOK)
{
*pCslStatus = status;
return UI_CSL_FAIL;
}
/* Reset GPT1 */
status = GPT_reset(gsGptHandle);
if(status != CSL_SOK)
{
*pCslStatus = status;
return UI_CSL_FAIL;
}
/* Configure GPT1 */
tmrPrd = (Uint32)((Float32)cpuFreq/2.0/pbnSampFreq + 0.5)-1;
hwConfig.autoLoad = GPT_AUTO_ENABLE;
hwConfig.ctrlTim = GPT_TIMER_ENABLE;
hwConfig.preScaleDiv = GPT_PRE_SC_DIV_0;
hwConfig.prdLow = (Uint16)tmrPrd;
hwConfig.prdHigh = (Uint16)(tmrPrd>>16);
status = GPT_config(gsGptHandle, &hwConfig);
if (status != CSL_SOK)
{
*pCslStatus = status;
return UI_CSL_FAIL;
}
/* Clear pending interrupts */
CSL_SYSCTRL_REGS->TIAFR = 0x7;
return UI_SOK;
}