docs

GDI-4ch/firmware/io_pins.h

@@ -8,8 +8,10 @@
 
 #pragma once
 
+// D20
 #define LED_BLUE_PORT GPIOB
 #define LED_BLUE_PIN 13
 
+// D21
 #define LED_GREEN_PORT GPIOA
 #define LED_GREEN_PIN 8

GDI-4ch/firmware/main.cpp

@@ -475,6 +475,7 @@ int main() {
         palSetPadMode(LED_BLUE_PORT, LED_BLUE_PIN, PAL_MODE_OUTPUT_PUSHPULL);
 
         if ((id >> 8) == 0x9D) {
+            // happy board - green D21 blinking
             palTogglePad(LED_GREEN_PORT, LED_GREEN_PIN);
         } else {
             palTogglePad(LED_BLUE_PORT, LED_BLUE_PIN);