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AnswerRe: Will casting / passing 16 bit int as double harm FFT processing? Pin
Richard MacCutchan27-Sep-14 22:07
mveRichard MacCutchan27-Sep-14 22:07 
GeneralRe: Will casting / passing 16 bit int as double harm FFT processing? Pin
Vaclav_28-Sep-14 4:18
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GeneralRe: Will casting / passing 16 bit int as double harm FFT processing? Pin
Richard MacCutchan28-Sep-14 4:40
mveRichard MacCutchan28-Sep-14 4:40 
GeneralRe: Will casting / passing 16 bit int as double harm FFT processing? Pin
Vaclav_28-Sep-14 6:10
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GeneralRe: Will casting / passing 16 bit int as double harm FFT processing? Pin
Richard MacCutchan28-Sep-14 6:41
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GeneralRe: Will casting / passing 16 bit int as double harm FFT processing? Pin
Vaclav_28-Sep-14 8:35
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GeneralRe: Will casting / passing 16 bit int as double harm FFT processing? Pin
Richard MacCutchan28-Sep-14 21:58
mveRichard MacCutchan28-Sep-14 21:58 
GeneralRe: Will casting / passing 16 bit int as double harm FFT processing? Pin
Vaclav_29-Sep-14 4:06
MemberVaclav_29-Sep-14 4:06 
Hello Richard,
this is getting really interesting.
Here is some stuff to think about.
It all started by compiler complaining about integer pointer being passed to function expecting double pointer.
Second - I put together two sources - one collecting 10 bits of data into 16 bits integer array and not processing anything, just collecting.
The second source builds / emulates sine wave into array of doubles and that gets processed by FFT. So I replaced the emulated (double) data with real (integer) collected data.
My thinking is - if I cast or build a new variable as double it will take an 16 bit integer and process it as double, than what will happen to the original array ?
I am still learning about FFT , but as far as I can tell the first FFT function puts new data (normal pointer behavior) into the original (integer ) array as what ? Integer? I don't think so. ( And how is the pointer advanced? If as double will it skip next ADC data?)
I think the only way is to collect the ADC data into double array from get go.
And that was the OP question.
Thanks for all your help.
Cheers Vaclav
GeneralRe: Will casting / passing 16 bit int as double harm FFT processing? Pin
Richard MacCutchan29-Sep-14 5:27
mveRichard MacCutchan29-Sep-14 5:27 
AnswerRe: Will casting / passing 16 bit int as double harm FFT processing? Pin
Albert Holguin29-Sep-14 9:36
professionalAlbert Holguin29-Sep-14 9:36 
GeneralSOLVED Will casting / passing 16 bit int as double harm FFT processing? YES Pin
Vaclav_29-Sep-14 17:13
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QuestionConverting a string to a double Pin
Richard Andrew x6426-Sep-14 20:53
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AnswerRe: Converting a string to a double Pin
Richard MacCutchan26-Sep-14 21:35
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AnswerRe: Converting a string to a double Pin
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QuestionSigned integers considered harmful? Pin
harold aptroot26-Sep-14 8:38
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AnswerRe: Signed integers considered harmful? Pin
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AnswerRe: Signed integers considered harmful? Pin
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AnswerRe: Signed integers considered harmful? Pin
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GeneralRe: Signed integers considered harmful? Pin
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GeneralRe: Signed integers considered harmful? Pin
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GeneralRe: Signed integers considered harmful? Pin
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GeneralRe: Signed integers considered harmful? Pin
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GeneralRe: Signed integers considered harmful? Pin
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