fw: Implement print out of MAC address

This validates that a hardware MAC address is available on the chip.
Based on that it can be decided if a MAC EEPROM should be added to the
PCB.

1 files changed, 31 insertions, 0 deletions

diff --git a/fw/src/main.c b/fw/src/main.c
index 31dbf45..a21e6d7 100644
--- a/fw/src/main.c
+++ b/fw/src/main.c
@@ -1,4 +1,35 @@
+#include <zephyr/logging/log.h>
+#include <zephyr/net/net_if.h>
+
+LOG_MODULE_REGISTER(main);
+
 int main(void)
 {
+	LOG_INF("Function main was started.");
+
+	struct net_if *iface = net_if_get_default();
+	if (iface == NULL) {
+		LOG_ERR("Could not find default network interface.");
+		goto FINISH;
+	}
+	LOG_DBG("Got default network interface pointer 0x%p", (void *)iface);
+
+	struct net_linkaddr *link_addr = net_if_get_link_addr(iface);
+	if (iface == NULL) {
+		LOG_ERR("Could not determine link address of default network interface.");
+		goto FINISH;
+	}
+	LOG_INF(
+		"Got link address of default network interface: %02x:%02x:%02x:%02x:%02x:%02x",
+		link_addr->addr[0],
+		link_addr->addr[1],
+		link_addr->addr[2],
+		link_addr->addr[3],
+		link_addr->addr[4],
+		link_addr->addr[5]
+	);
+
+FINISH:
+	LOG_INF("Function main was finished.");
 	return 0;
 }