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PDM: rp2040: use dynamically allocate memory for LUT #299

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PDM: rp2040: use dynamically allocate memory for LUT #299

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67 changes: 61 additions & 6 deletions libraries/PDM/src/rp2040/OpenPDMFilter.c → libraries/PDM/src/rp2040/OpenPDMFilter.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -30,18 +30,19 @@
/* Includes ------------------------------------------------------------------*/

#include "OpenPDMFilter.h"

#include <Arduino.h>
#include "FlashIAPBlockDevice.h"

/* Variables -----------------------------------------------------------------*/

uint32_t div_const = 0;
int64_t sub_const = 0;
uint32_t sinc[DECIMATION_MAX * SINCN];
uint32_t sinc1[DECIMATION_MAX];
uint32_t sinc2[DECIMATION_MAX * 2];
uint32_t coef[SINCN][DECIMATION_MAX];
uint32_t* sinc;
uint32_t* sinc1;
uint32_t* sinc2;
uint32_t** coef;
#ifdef USE_LUT
int32_t lut[256][DECIMATION_MAX / 8][SINCN];
int32_t*** lut;
#endif


Expand Down Expand Up @@ -166,6 +167,23 @@ void Open_PDM_Filter_Init(TPDMFilter_InitStruct *Param)
uint16_t i, j;
int64_t sum = 0;

sinc = (uint32_t*)malloc(DECIMATION_MAX * SINCN * sizeof(uint32_t));
sinc1 = (uint32_t*)malloc(DECIMATION_MAX * sizeof(uint32_t));
sinc2 = (uint32_t*)malloc(DECIMATION_MAX * 2 * sizeof(uint32_t));
coef = (uint32_t**)malloc(SINCN * sizeof(uint32_t*));
for (int i = 0; i < SINCN; i++) {
coef[i] = (uint32_t*)malloc(DECIMATION_MAX * sizeof(uint32_t));
}
#ifdef USE_LUT
lut = (int32_t***)malloc(256 * sizeof(int32_t**));
for (int i = 0; i < 256; i++) {
lut[i] = (int32_t**)malloc(DECIMATION_MAX / 8 * sizeof(int32_t*));
for (int j = 0; j < DECIMATION_MAX / 8; j++) {
lut[i][j] = (int32_t*)malloc(SINCN * sizeof(int32_t));
}
}
#endif

uint8_t decimation = Param->Decimation;

for (i = 0; i < SINCN; i++) {
Expand Down Expand Up @@ -213,6 +231,43 @@ void Open_PDM_Filter_Init(TPDMFilter_InitStruct *Param)
((c >> 1) & 0x01) * coef_p[d * 8 + 6] +
((c ) & 0x01) * coef_p[d * 8 + 7];
}


#if 0
// 1MB block device, 1MB into flash storage
static FlashIAPBlockDevice bd(XIP_BASE + 0x100000, 0x100000);
int err = bd.init();
err = bd.program(lut, 0, DECIMATION_MAX / 8 * SINCN * 256 * sizeof(int32_t));

int32_t*** _lut = lut;

lut = (int32_t***)(XIP_BASE + 0x100000);

/*
for (int i = 0; i < 256; i++) {
for (int j = 0; j < DECIMATION_MAX / 8; j++) {
for (int k = 0; k < SINCN; k++) {
Serial.println(lut[i][j][k]);
}
}
}
*/

for (int i = 0; i < 256; i++) {
for (int j = 0; j < DECIMATION_MAX / 8; j++) {
free(_lut[i][j]);
}
free(_lut[i]);
}
#endif

free(sinc);
free(sinc1);
free(sinc2);
for (int i = 0; i < SINCN; i++) {
free(coef[i]);
}

#endif
}

Expand Down