reflow-oven-control-sw/stm-firmware/boot/startup-tests.c

#include "startup-tests.h"

uint32_t startup_test_perform_ccm_ram_check(void)
{
	const void *ccmram_base = (void *)0x10000000UL;
	const uint32_t ccmram_size = 64U * 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 *)ccmram_base; idx < ccmram_size / 4U; idx++) {
		word_ptr[idx] = idx & 1 ? 0x55AA55AAUL : 0xAA55AA55UL;
	}
	for (idx = 0, word_ptr = (volatile uint32_t *)ccmram_base; idx < ccmram_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 *)ccmram_base; idx < ccmram_size / 4U; idx++) {
		word_ptr[idx] = idx & 1 ? 0xAA55AA55UL : 0x55AA55AAUL;
	}
	for (idx = 0, word_ptr = (volatile uint32_t *)ccmram_base; idx < ccmram_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 *)ccmram_base; idx < ccmram_size / 4U; idx++) {
		word_ptr[idx] = 0xFFFFFFFFUL;
	}
	for (idx = 0, word_ptr = (volatile uint32_t *)ccmram_base; idx < ccmram_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 *)ccmram_base; idx < ccmram_size / 4U; idx++) {
		word_ptr[idx] = 0x0UL;
	}
	for (idx = 0, word_ptr = (volatile uint32_t *)ccmram_base; idx < ccmram_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;
}