From 163a3a9f4e111ccebc55eaf938aa30fe23750240 Mon Sep 17 00:00:00 2001
From: Liz <liz@adafruit.com>
Date: Mon, 20 May 2024 14:51:59 -0400
Subject: [PATCH] picowbell tripler demos

CircuitPython and Arduino demos for the PiCowbell Tripler
---
 .../Arduino_PiCowbell_Tripler_Demo.ino        | 71 +++++++++++++++++++
 Tripler_PiCowbell_Demos/CircuitPython/code.py | 54 ++++++++++++++
 2 files changed, 125 insertions(+)
 create mode 100644 Tripler_PiCowbell_Demos/Arduino_PiCowbell_Tripler_Demo/Arduino_PiCowbell_Tripler_Demo.ino
 create mode 100644 Tripler_PiCowbell_Demos/CircuitPython/code.py

diff --git a/Tripler_PiCowbell_Demos/Arduino_PiCowbell_Tripler_Demo/Arduino_PiCowbell_Tripler_Demo.ino b/Tripler_PiCowbell_Demos/Arduino_PiCowbell_Tripler_Demo/Arduino_PiCowbell_Tripler_Demo.ino
new file mode 100644
index 000000000..5dace8e43
--- /dev/null
+++ b/Tripler_PiCowbell_Demos/Arduino_PiCowbell_Tripler_Demo/Arduino_PiCowbell_Tripler_Demo.ino
@@ -0,0 +1,71 @@
+// SPDX-FileCopyrightText: 2024 Liz Clark for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#include <Adafruit_NeoPixel.h>
+#include <Adafruit_GFX.h>    // Core graphics library
+#include <Adafruit_ST7789.h> // Hardware-specific library for ST7789
+#include <SPI.h>
+#include <Fonts/FreeSansBold24pt7b.h>
+
+#define LED    LED_BUILTIN
+#define TFT_CS        21
+#define TFT_RST       -1
+#define TFT_DC        20
+#define NEO_PIN       A2
+
+uint32_t Wheel(byte WheelPos);
+
+Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_RST);
+
+Adafruit_NeoPixel pixel = Adafruit_NeoPixel(1, NEO_PIN, NEO_GRB + NEO_KHZ800);
+
+unsigned long lastMillis = 0;
+uint8_t j = 0;
+
+void setup() {
+  Serial.begin(115200);
+  //while (!Serial)  delay(1);  // wait for serial port
+  tft.init(240, 240);
+  pinMode(LED, OUTPUT);
+  delay (100);
+  Serial.println("PiCowbell Tripler Demo");
+  tft.setFont(&FreeSansBold24pt7b);
+  pixel.begin();
+  pixel.setBrightness(50);
+  pixel.show(); // Initialize all pixels to 'off'
+  lastMillis = millis();
+
+}
+
+void loop() {
+  if (millis() > (lastMillis + 5000)) {
+    digitalWrite(LED, HIGH);
+    // get the on-board voltage
+    float vsys = analogRead(A3) * 3 * 3.3 / 1023.0;
+    Serial.printf("Vsys: %0.1f V", vsys);
+    Serial.println();
+    digitalWrite(LED, LOW);
+    tft.fillScreen(ST77XX_BLACK);
+    tft.setCursor(240 / 4, 240 / 2);
+    tft.setTextColor(ST77XX_WHITE);
+    tft.printf("%0.1f V", vsys);
+    lastMillis = millis();
+  }
+  pixel.setPixelColor(0, Wheel(j++));
+  pixel.show();
+  delay(20);
+}
+
+uint32_t Wheel(byte WheelPos) {
+  WheelPos = 255 - WheelPos;
+  if(WheelPos < 85) {
+    return pixel.Color(255 - WheelPos * 3, 0, WheelPos * 3);
+  }
+  if(WheelPos < 170) {
+    WheelPos -= 85;
+    return pixel.Color(0, WheelPos * 3, 255 - WheelPos * 3);
+  }
+  WheelPos -= 170;
+  return pixel.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
+}
diff --git a/Tripler_PiCowbell_Demos/CircuitPython/code.py b/Tripler_PiCowbell_Demos/CircuitPython/code.py
new file mode 100644
index 000000000..989d17894
--- /dev/null
+++ b/Tripler_PiCowbell_Demos/CircuitPython/code.py
@@ -0,0 +1,54 @@
+# SPDX-FileCopyrightText: Copyright (c) 2024 Liz Clark for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+import busio
+import board
+from analogio import AnalogIn
+import adafruit_st7789
+import displayio
+import neopixel
+from rainbowio import colorwheel
+from adafruit_display_text import label
+from adafruit_ticks import ticks_ms, ticks_add, ticks_diff
+from font_orbitron_bold_webfont_36 import FONT as orbitron_font
+
+displayio.release_displays()
+spi = busio.SPI(clock=board.GP18, MOSI=board.GP19)
+display_bus = displayio.FourWire(spi, command=board.GP20, chip_select=board.GP21, reset=None)
+display = adafruit_st7789.ST7789(display_bus, width=240, height=240, rowstart=80, rotation=0)
+
+group = displayio.Group()
+text = label.Label(orbitron_font, text="0V", color=0xFF0000)
+text.anchor_point = (0.5, 0.5)
+text.anchored_position = (display.width / 2, display.height / 2)
+group.append(text)
+display.root_group = group
+
+analog_in = AnalogIn(board.A3)
+
+def get_vsys(pin):
+    return ((pin.value * 3) * 3.3) / 65535
+
+pixel_pin = board.A2
+num_pixels = 1
+pixel = neopixel.NeoPixel(pixel_pin, num_pixels,
+                           brightness=0.1, auto_write=True)
+hue = 0
+pixel.fill(colorwheel(hue))
+
+bat_clock = ticks_ms()
+bat_timer = 5000
+neo_clock = ticks_ms()
+neo_timer = 100
+
+while True:
+    if ticks_diff(ticks_ms(), bat_clock) >= bat_timer:
+        print(f"The battery level is: {get_vsys(analog_in):.1f}V")
+        text.text = f"{get_vsys(analog_in):.1f}V"
+        text.color = colorwheel(hue)
+        bat_clock = ticks_add(bat_clock, bat_timer)
+    if ticks_diff(ticks_ms(), neo_clock) >= neo_timer:
+        hue = (hue + 7) % 256
+        pixel.fill(colorwheel(hue))
+        neo_clock = ticks_add(neo_clock, neo_timer)