Capture frequency_KEAZN16_prcoessor expert

vijenad — Thu, 21 Jan 2016 07:57:36 GMT

for(;;)

{

if ((Cap1_GetEventStatus(CapPtr) & LDD_CAPTURE_ON_CAPTURE)!=0U)

{

Error = Cap1_GetCaptureValue(CapPtr, &Data);

current_data = Data;

if (current_data > previous_data)

result = current_data - previous_data;

previous_data = current_data;

res_ppg = (result / 6.427977839)*3.814697266;

PPG1_SetRatio16(CapPtr,32767);

PPG1_SetPeriodUS(CapPtr,res_ppg);

}

The above code is working fine, Issue is

if there is no input, then res_ppg will have the previous value.

I know - bcoz of "if ((Cap1_GetEventStatus(CapPtr) & LDD_CAPTURE_ON_CAPTURE)!=0U)",

code doesn't enter into the loop and hence it shows previous freq value.

I tried by providing else loop, but its not working,

Any suggestions !

Re: Capture frequency_KEAZN16_prcoessor expert

Robin_Shen — Fri, 22 Jan 2016 06:37:06 GMT

Hi Vijeendra

If the FTM counter overflows between the first and second capture, I am afraid of the res_ppg will have the wrong value.

I think you can clear those data if FTM counter overflow.

refer below:

if ((Cap1_GetEventStatus(CapPtr) & LDD_CAPTURE_ON_OVERRUN) != 0U)

{ }

Best Regards

Robin