From 351438680dbc9f736f973d20e93efca2533ae5d7 Mon Sep 17 00:00:00 2001
From: rusefi <rusefillc@gmail.com>
Date: Sat, 4 Jun 2022 17:39:53 -0400
Subject: [PATCH] docs

---
 GDI-4ch/firmware/io_pins.h | 2 ++
 GDI-4ch/firmware/main.cpp  | 1 +
 2 files changed, 3 insertions(+)

diff --git a/GDI-4ch/firmware/io_pins.h b/GDI-4ch/firmware/io_pins.h
index 1d0290b..a07ec80 100644
--- a/GDI-4ch/firmware/io_pins.h
+++ b/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
diff --git a/GDI-4ch/firmware/main.cpp b/GDI-4ch/firmware/main.cpp
index fb6957f..65766d3 100644
--- a/GDI-4ch/firmware/main.cpp
+++ b/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);