Merge pull request #1 from sonocotta/features/rev-b-updates

Rev B changes

.github/workflows/build.yml

@@ -0,0 +1,37 @@
+name: PlatformIO CI
+
+on: [ push, pull_request, workflow_dispatch ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Cache pip
+      uses: actions/cache@v2
+      with:
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-pip-
+    
+    - name: Cache PlatformIO
+      uses: actions/cache@v2
+      with:
+        path: ~/.platformio
+        key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+    
+    - name: Set up Python
+      uses: actions/setup-python@v2
+    
+    - name: Install PlatformIO
+      run: |
+        python -m pip install --upgrade pip
+        pip install --upgrade platformio
+    
+    - name: Run PlatformIO
+      working-directory: ./firmware/t1616-starter
+      run: pio run
+      

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "firmware/jtag2updi"]
+	path = firmware/jtag2updi
+	url = https://github.com/anabolyc/jtag2updi

README.md

@@ -70,7 +70,21 @@ Spence Konde created another great [writeup](https://github.com/SpenceKonde/AVR-
 
 Method (c) is disqualified on 1-Series chip because of RESET/UPDI pin collision, and both (a) and (b) work equally well. Difference being what is easier for you: (a) dedicate Arduino Nano board for programming or (b) do solder job on your usb-serial adapter.
 
-![image](https://user-images.githubusercontent.com/5459747/206929018-e960566d-2edd-4ede-aa5d-861d47c59a57.png)
+### Revision A (Discontinued)
+
+| Method | Connection |
+|----------|------------|
+|  jtag2updi         | ![image](https://user-images.githubusercontent.com/5459747/213477557-20c45e7f-9749-4db9-b5e8-835daf2b69b4.png)
+| SerialUPDI<br/>(recommended) | ![image](https://user-images.githubusercontent.com/5459747/213477231-9fa7431a-e2d6-4d7b-93d9-fbb924b21496.png)
+
+### Revision B (Current latest)
+
+Starting from revision B diode between TX and RX pins are included on the board, so you can use unmodified USB-Serial adapter.
+
+| Method | Connection |
+|----------|------------|
+|  jtag2updi         | ![image](https://user-images.githubusercontent.com/5459747/213477813-b20dfe72-d417-455c-b683-b1e41a4e2247.png)
+| SerialUPDI<br/>(recommended) | ![image](https://user-images.githubusercontent.com/5459747/213477716-04c15d4e-4179-488a-910e-8a37a4a4ce2f.png)
 
 ### Arduino IDE
 

firmware/t1616-starter/src/main.cpp

@@ -3,6 +3,7 @@
 
 #define PIN_LED PIN_PB4 // 5
 #define PIN_RGB PIN_PA7
+#define PIN_BTN PIN_PA0
 
 uint8_t seq = 0;
 
@@ -11,6 +12,7 @@ Adafruit_NeoPixel pixels(1, PIN_RGB, NEO_GRB + NEO_KHZ800);
 void setup() {
 
   pinMode(PIN_LED, OUTPUT);
+  pinMode(PIN_BTN, INPUT);
 
   delay(1000);
   Serial.begin(115200);
@@ -19,11 +21,19 @@ void setup() {
   pixels.begin();
 }
 
+uint8_t btn_state = HIGH;
+
 void loop() {
   seq++;
 
   Serial.print('.');
 
+  if (btn_state != digitalRead(PIN_BTN)) {
+    btn_state = !btn_state;
+    Serial.print("Button state is ");
+    Serial.println(btn_state);
+  }
+
   digitalWrite(PIN_LED, seq % 2);
 
   pixels.clear();
@@ -31,5 +41,5 @@ void loop() {
     pixels.setPixelColor(0, pixels.Color((0xff - seq) % 0xff, seq % 0xff, seq % 0x7f + (0xff - seq) % 0x7f));
   pixels.show();
 
-  delay(250);
+  delay(500);
 }