CODEWITHSUNDEEP
fftuartmsp430kissfft
ALackOfNumbers
ALackOfNumbers

Reputation: 11

Kiss FFT on TI MSP430FR6989

I am trying to run Kiss FFT (Kiss FFT github) on an MSP430FR6989 Launchpad. For now, I'm just trying to get the kiss_fftr test shown here to work. I am running into an issue with kiss_fftr_alloc(int nfft,int inverse_fft,void * mem, size_t * lenmem). My input is (16, 0, NULL, NULL). The function reaches this point in kiss_fftr.c and then returns NULL due to the !st if statement.

if (lenmem == NULL) {
    st = (kiss_fftr_cfg) KISS_FFT_MALLOC (memneeded);
} else {
    if (*lenmem >= memneeded)
        st = (kiss_fftr_cfg) mem;
    *lenmem = memneeded;
}
if (!st)
{
    return NULL;
}

Malloc sets st to NULL, so it failed to allocate the memory. I am sure that there is enough memory available in my MCU. My memory allocation in CCS is 35% RAM (736/2048), 3% FRAM1 (1896/48000) and 28% FRAM2 (23144/81912).

Does anyone have advice on how to fix this, or what I should learn to fix this? I don't want to chase down the wrong rabbit hole if memory allocation is not the issue.

What I've tried: When I try running the test code given in the stack overflow link and sending the output array over UART, I get no output. I checked to see if kiss_fft_alloc is working correctly by making an if statement (st == NULL) that would throw a KISS_FFT_ERROR. The error threw at the point mentioned above, but I cannot figure out how to "fix" malloc failing to allocate memory.

Upvotes: 1

Views: 219

Answers (0)

Related Questions