Merge branch 'develop' -- breaking changes 2022-05-28.

1 files changed, 19 insertions, 0 deletions

diff --git a/platforms/avr/hardware_id.c b/platforms/avr/hardware_id.c
new file mode 100644
index 0000000000..b61f0d92df
--- /dev/null
+++ b/platforms/avr/hardware_id.c
@@ -0,0 +1,19 @@
+// Copyright 2022 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+// For some reason this bit is undocumented for some AVR parts and not defined in their avr-libc IO headers
+// See https://stackoverflow.com/questions/12350914/how-to-read-atmega-32-signature-row
+#ifndef SIGRD
+#    define SIGRD 5
+#endif // SIGRD
+
+#include <avr/boot.h>
+#include "hardware_id.h"
+
+hardware_id_t get_hardware_id(void) {
+    hardware_id_t id = {0};
+    for (uint8_t i = 0; i < 10; i += 1) {
+        ((uint8_t*)&id)[i] = boot_signature_byte_get(i + 0x0E);
+    }
+    return id;
+}