How to receive the FFTdata from subcore?

[denko 2]

Hi there,
I modified from the examples, but I hope to find a good way to receive the FFT data from the subcore.

For example, for the 'Highpassband' example, I find the code:
'memcpy(&out_buffer[pos][0], pDst, cnt * sizeof(q15_t) * g_channel);

result[pos].buffer = (void*)MP.Virt2Phys(&out_buffer[pos][0]);'

however, there is an error when I write q15_t* buffer in the main core. It looks like q15_t* is only used in the sub-core.

I then try to use the general way like:
FFT.get(result[pos].fftResult, i);
ret = MP.Send(rcvid, &result[pos], 0);

struct Result {
Result() {
clear();
}
float fftResult[FFT_LEN];

void clear() {
for (int i = 0; i < MAX_CHANNEL_NUM; i++) {
found[i] = false;
}
// Clear the FFT result array
for (int i = 0; i < FFT_LEN; i++) {
fftResult[i] = 0;
}
}

But it can receive a frame data, and an error happens:
up_assert: Assertion failed at file:chip/cxd56_icc.c line: 229 task: Idle Task
Could you please guide me or show me an efficiency way to receive the FFT data from the sub-core?
Thanks very much.