firmware/src/uid64.c


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#include <stdio.h>

#include <zephyr/devicetree.h>

#include "uid64.h"

#define UID64_NODE DT_NODELABEL(uid64)

uint64_t uid64_get(void) {
#if DT_NODE_EXISTS(UID64_NODE)
		return *(volatile uint64_t *) DT_REG_ADDR(UID64_NODE);
#else
		return 0;
#endif
}

void uid64_to_string(uint64_t uid, char *str) {
	uint8_t *source = (uint8_t *)&uid + 7;
	char *sink = str;

	for (unsigned int i = 0; i < 8; i++) {
		/* delimiter */
		if (i > 0) {
			*sink = ':';
			sink++;
		}

		/* byte values */
		snprintf(sink, 3, "%02x", *source);
		source--;
		sink += 2;
	}
}

bool uid64_available(void) {
#if DT_NODE_EXISTS(UID64_NODE)
	return true;
#else
	return false;
#endif
}