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Write memory test for system RAM

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This commit is contained in:
Mario Hüttel
2021-05-22 11:25:55 +02:00
parent 3345004213
commit ebb1383957
3 changed files with 108 additions and 5 deletions
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62
stm-firmware/boot/startup-tests.c
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@@ -62,3 +62,65 @@ uint32_t startup_test_perform_ccm_ram_check(void)
exit_ret_address:
return ret;
}
uint32_t startup_test_perform_system_ram_check()
{
const void *ram_base = (void *)0x20000000UL;
const uint32_t ram_size = 128U * 1024UL;
volatile uint32_t *word_ptr;
uint32_t target_val;
uint32_t idx;
uint32_t ret = 0UL;
/* Perform inversion test with 0x55 and 0xAA, Part 1 */
for (idx = 0, word_ptr = (volatile uint32_t *)ram_base; idx < ram_size / 4U; idx++) {
word_ptr[idx] = idx & 1 ? 0x55AA55AAUL : 0xAA55AA55UL;
}
for (idx = 0, word_ptr = (volatile uint32_t *)ram_base; idx < ram_size / 4U; idx++) {
target_val = idx & 1 ? 0x55AA55AAUL : 0xAA55AA55UL;
if (target_val != word_ptr[idx]) {
ret = (uint32_t)&word_ptr[idx];
goto exit_ret_address;
}
}
/* Perform inversion test with 0x55 and 0xAA, Part 2 */
for (idx = 0, word_ptr = (volatile uint32_t *)ram_base; idx < ram_size / 4U; idx++) {
word_ptr[idx] = idx & 1 ? 0xAA55AA55UL : 0x55AA55AAUL;
}
for (idx = 0, word_ptr = (volatile uint32_t *)ram_base; idx < ram_size / 4U; idx++) {
target_val = idx & 1 ? 0xAA55AA55UL : 0x55AA55AAUL;
if (target_val != word_ptr[idx]) {
ret = (uint32_t)&word_ptr[idx];
goto exit_ret_address;
}
}
/* Perform static test with 0xFF */
for (idx = 0, word_ptr = (volatile uint32_t *)ram_base; idx < ram_size / 4U; idx++) {
word_ptr[idx] = 0xFFFFFFFFUL;
}
for (idx = 0, word_ptr = (volatile uint32_t *)ram_base; idx < ram_size / 4U; idx++) {
target_val = 0xFFFFFFFFUL;
if (target_val != word_ptr[idx]) {
ret = (uint32_t)&word_ptr[idx];
goto exit_ret_address;
}
}
/* Perform static test with 0x00 */
for (idx = 0, word_ptr = (volatile uint32_t *)ram_base; idx < ram_size / 4U; idx++) {
word_ptr[idx] = 0x0UL;
}
for (idx = 0, word_ptr = (volatile uint32_t *)ram_base; idx < ram_size / 4U; idx++) {
target_val = 0x0UL;
if (target_val != word_ptr[idx]) {
ret = (uint32_t)&word_ptr[idx];
goto exit_ret_address;
}
}
exit_ret_address:
return ret;
}