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/*
memtools.h
June 2019
Tools for looking at memory on the stm32. See also debug_alloc.h
*/
#include <stdlib.h>
#include <sys/types.h>
#include <math.h>
#include "memtools.h"
/* Required memory allocation wrapper for embedded platforms. For SM1000, we can just use stdlib's memory functions. */
void* codec2_malloc(size_t size)
{
return malloc(size);
}
void* codec2_calloc(size_t nmemb, size_t size)
{
return calloc(nmemb, size);
}
void codec2_free(void* ptr)
{
free(ptr);
}
/* startup_stm32f4xx.s has been modified to fill RAM segment from bss up with 0x0x55555555 */
void memtools_find_unused( int (*printf_func)(const char *fmt, ...) ) {
int32_t *p, *start;
int found = 0;
(*printf_func)("chunks of RAM segment > 256 bytes containing start up pattern:\n");
/* count down from top of memory through stack, empty memory, then to heap */
for (p =(int32_t*)0x20000000; p<(int32_t*)0x20020000; p++) {
if (found == 0) {
if (*p == 0x55555555) {
start = p;
found = 1;
}
}
if (found == 1) {
if (*p != 0x55555555) {
found = 0;
int bytes = (void*)p - (void*)start;
if (bytes >= 0x100)
(*printf_func)(" start: 0x%x end: 0x%x bytes: %d\n", (int) start, (int)p, bytes);
}
}
}
}
void memtools_isnan(float *vec, int n, char *label, int (*printf_func)(const char *fmt, ...)) {
int count = 0;
for(int i=0; i<n; i++) {
if (isnan(vec[i])) {
(*printf_func)("%s memtools_isnan: %d %p\n", label, i, &vec[i]);
if (count++ == 5) return;
}
}
}
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