Start working on basic hardware support

README.md

@@ -46,6 +46,10 @@ A debug console for serial TTL. This can be used to work with serial TTL directl
 - Battery level on feather neopixel (green = >80% ; yellow >=40% ; orange >= 25% ; red < 25%)
 - User LED (red) always on when feather is running
 
+## Building / Uploading
+
+The ```make.ps1```, ```build.ps1``` and ```upload.ps1``` scripts can be used to build/upload this project. These scripts call the ```arduino-cli``` commands programatically.
+
 ## Licensing
 
 Unless otherwise stated all source code is licensed under the [Apache 2 License](LICENSE-APACHE-2.0.txt).

build.ps1

@@ -0,0 +1 @@
+arduino-cli compile --log-level=warn --fqbn adafruit:nrf52:feather52840 serial_debugger.ino

make.ps1

@@ -1 +1,8 @@
-arduino-cli compile --log-level=warn --fqbn adafruit:nrf52:feather52840 serial_debugger.ino
+# Ensure this script fails if either build or upload fails
+$ErrorActionPreference = "Stop"
+
+# Ensure we actually build before upload (common mistake)
+& .\build.ps1
+
+# Upload to board
+& .\upload.ps1

serial_debugger.ino

@@ -3,6 +3,8 @@
 
 // Various library includes
 #include <Adafruit_NeoPixel.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_ILI9341.h>
 
 // Debugging via serial monitor (don't turn this on unless you're hacking on the firmware code)
 #define DEBUG true
@@ -12,10 +14,26 @@
 float measuredVBat;
 float batteryPercent;
 
+// TFT Setup
+#define TFT_CS 9
+#define TFT_DC 10
+Adafruit_ILI9341 tft(TFT_CS, TFT_DC);
+#include <Fonts/FreeMono9pt7b.h>
+#define CHARS_HORIZONTAL 28
+#define CHARS_ROWS 13
+
 // NeoPixels
 #define NUMPIXELS 1
 Adafruit_NeoPixel pixels(NUMPIXELS, PIN_NEOPIXEL, NEO_GRB + NEO_KHZ800);
 
+// UI screens
+void screenClear();
+
+// Color conversion (RGB888 -> RGB565 used by Adafruit GFX)
+uint16_t RGB565(uint8_t r, uint8_t g, uint8_t b) {
+  return ((r & 0b11111000) << 8) | ((g & 0b11111100) << 3) | (b >> 3);
+}
+
 void setup() {
   // Setup red LED to indicate device is on (in case we disable NeoPixel battery level later)
   pinMode(3, OUTPUT);
@@ -32,6 +50,13 @@ void setup() {
   // Red : pixels.Color(255, 0, 0)
   pixels.setPixelColor(0, pixels.Color(0, 0, 0));
   pixels.show();
+
+  // Setup TFT
+  tft.begin();
+  tft.setRotation(1);
+  screenClear();
+  tft.println("");
+  tft.setFont(&FreeMono9pt7b);
 }
 
 // Measure battery level and change NeoPixel accordingly
@@ -67,3 +92,9 @@ void loop() {
   
   delay(250);
 }
+
+// Clear the screen
+void screenClear() {
+  tft.setCursor(0, 0);
+  tft.fillScreen(RGB565(0, 0, 0));
+}

upload.ps1

@@ -1 +1,4 @@
-arduino-cli upload --fqbn adafruit:nrf52:feather52840 -p COM5
+# Get list of boards
+$COM_PORT=$(arduino-cli board list | Select-String -Pattern "adafruit:nrf52:feather52840" | %{ $_.ToString().Split(' ')[0]; })
+Write-Host "Using serial port $($COM_PORT)"
+arduino-cli upload --fqbn adafruit:nrf52:feather52840 -p $COM_PORT