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Rewrite MUX: WS2812C LEDs (NeoPixel) + 74HC165 buttons

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PixelStomp MUX uses:
- WS2812C LEDs: one data line via DAT (GPIO 9), NeoPixel protocol
- 74HC165 shift register: LD/CLK/DI for reading 8 button states

Changes:
- Use Adafruit NeoPixel library for LED control
- Proper 74HC165 parallel-load shift-in for buttons
- 8 switches + 8 LEDs (was incorrectly 10)
- Diagnostic commands: dump, ledtest, red, green, blue, read
This commit is contained in:
Ashley Strahle
2026-06-23 13:38:51 +00:00
parent 2dfd016b76
commit 07e5cd8994
8 changed files with 122 additions and 139 deletions
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src/main.cpp
+27 -27
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@@ -31,45 +31,45 @@ void handle_serial_command(const String& cmd) {
if (cmd == "dump" || cmd == "d") {
mux.dump();
} else if (cmd == "ledon") {
for (int i = 0; i < 10; i++) {
mux.set_led(i, true);
delay(50);
for (int i = 0; i < 8; i++) {
mux.set_led_color(i, 255, 255, 255);
}
mux.show();
Serial.println("[CMD] All LEDs ON");
} else if (cmd == "ledoff") {
mux.clear_all();
} else if (cmd == "ledtest") {
for (int i = 0; i < 10; i++) {
mux.set_led(i, true);
delay(200);
mux.set_led(i, false);
delay(100);
uint32_t colors[] = {0xFF0000, 0x00FF00, 0x0000FF, 0xFFFF00, 0xFF00FF, 0x00FFFF};
for (int c = 0; c < 6; c++) {
uint8_t r = (colors[c] >> 16) & 0xFF;
uint8_t g = (colors[c] >> 8) & 0xFF;
uint8_t b = colors[c] & 0xFF;
for (int i = 0; i < 8; i++) {
mux.set_led_color(i, r, g, b);
}
mux.show();
delay(300);
}
mux.clear_all();
Serial.println("[CMD] LED test complete");
} else if (cmd == "read") {
uint16_t raw = mux.read_buttons();
Serial.printf("[CMD] Raw button state: 0x%03X (binary: ", raw);
for (int i = 9; i >= 0; i--) {
uint8_t raw = mux.read_buttons();
Serial.printf("[CMD] Raw: 0x%02X (", raw);
for (int i = 7; i >= 0; i--) {
Serial.print((raw >> i) & 1);
}
Serial.println(")");
} else if (cmd == "probe") {
Serial.println("[CMD] Probing MUX pins...");
Serial.printf(" DAT (GPIO %d) = %d\n", 9, digitalRead(9));
Serial.printf(" LD (GPIO %d) = %d\n", 10, digitalRead(10));
Serial.printf(" CLK (GPIO %d) = %d\n", 11, digitalRead(11));
Serial.printf(" DI (GPIO %d) = %d\n", 12, digitalRead(12));
Serial.println(" Toggling LD pin...");
for (int i = 0; i < 5; i++) {
digitalWrite(10, HIGH);
delayMicroseconds(100);
digitalWrite(10, LOW);
delayMicroseconds(100);
}
Serial.printf(" DI after LD toggle: %d\n", digitalRead(12));
} else if (cmd == "red") {
for (int i = 0; i < 8; i++) mux.set_led_color(i, 255, 0, 0);
mux.show();
} else if (cmd == "green") {
for (int i = 0; i < 8; i++) mux.set_led_color(i, 0, 255, 0);
mux.show();
} else if (cmd == "blue") {
for (int i = 0; i < 8; i++) mux.set_led_color(i, 0, 0, 255);
mux.show();
} else {
Serial.println("[CMD] Commands: dump, ledon, ledoff, ledtest, read, probe");
Serial.println("[CMD] Commands: dump, ledon, ledoff, ledtest, read, red, green, blue");
}
}