Config mux to git rid of chatter, add print for Serial terminal

Abstract out wire interface, no all 16 cells are functional

Patch to increase NUM_LEDS now that all cells are enabled

Update LDO and Buck DACs to use appropriate wire as well

firmware/src/cell.cpp

@@ -1,7 +1,10 @@
 #include "Cell.h"
 
 // Constructor
-Cell::Cell(uint8_t mux_channel) : mux_channel(mux_channel) {}
+Cell::Cell(uint8_t mux_channel, TwoWire& wire_interface) :
+    mux_channel(mux_channel), wire(wire_interface) {
+    // ...
+}
 
 // Implementation of public methods
 void Cell::init()
@@ -10,23 +13,23 @@ void Cell::init()
     setMuxChannel();
 
     // Initialize DACs
-    ldo_dac.begin(LDO_ADDRESS);
-    buck_dac.begin(BUCK_ADDRESS);
+    ldo_dac.begin(LDO_ADDRESS, &wire);
+    buck_dac.begin(BUCK_ADDRESS, &wire);
 
     // Initialize ADC
-    adc.begin(ADC_ADDRESS);
+    adc.begin(ADC_ADDRESS, &wire);
 
     // Configure GPIO expander
-    Wire.beginTransmission(0x20);
-    Wire.write(0x03); // Configuration register
-    Wire.write(0x00); // Set all pins as output
-    Wire.endTransmission();
+    wire.beginTransmission(0x20);
+    wire.write(0x03); // Configuration register
+    wire.write(0x00); // Set all pins as output
+    wire.endTransmission();
 
     // Set the outputs to 0
-    Wire.beginTransmission(0x20);
-    Wire.write(0x01); // Configuration register
-    Wire.write(0x00); // Set all pins as output
-    Wire.endTransmission();
+    wire.beginTransmission(0x20);
+    wire.write(0x01); // Configuration register
+    wire.write(0x00); // Set all pins as output
+    wire.endTransmission();
 }
 
 void Cell::disable()
@@ -153,10 +156,10 @@ void Cell::setGPIOState()
 {
     setMuxChannel();
     // Set output relay on P7
-    Wire.beginTransmission(TCA6408_ADDR);
-    Wire.write(0x01); // Output register
-    Wire.write(GPIO_STATE);
-    Wire.endTransmission();
+    wire.beginTransmission(TCA6408_ADDR);
+    wire.write(0x01); // Output register
+    wire.write(GPIO_STATE);
+    wire.endTransmission();
 }
 
 float Cell::readShuntCurrent()
@@ -170,7 +173,7 @@ float Cell::readShuntCurrent()
 
 void Cell::setMuxChannel()
 {
-    Wire.beginTransmission(MUX_ADDRESS);
-    Wire.write(1 << mux_channel);
-    Wire.endTransmission();
+    wire.beginTransmission(MUX_ADDRESS);
+    wire.write(1 << mux_channel);
+    wire.endTransmission();
 }

firmware/src/cell.h

@@ -11,7 +11,7 @@ class Cell
 {
 public:
     // Constructor
-    Cell(uint8_t mux_channel);
+    Cell(uint8_t mux_channel, TwoWire& wire_interface);
 
     // Public methods
     void init();
@@ -54,6 +54,7 @@ class Cell
 
     // Mux channel
     const uint8_t mux_channel;
+    TwoWire& wire;
 
     // Device instances
     Adafruit_MCP4725 ldo_dac;

firmware/src/main.cpp

@@ -29,21 +29,29 @@ const int DMM_MUX_PINS[] = {1, 2, 3, 4};
 const int DMM_MUX_ENABLE = 5;
 
 // Addressable LEDs
-#define NUM_LEDS 16
+#define NUM_LEDS 32
 CRGB leds[NUM_LEDS];
 
 // Create cells
-Cell cell1(0);
-Cell cell2(1);
-Cell cell3(2);
-Cell cell4(3);
-Cell cell5(4);
-Cell cell6(5);
-Cell cell7(6);
-Cell cell8(7);
+Cell cell1(0, Wire);
+Cell cell2(1, Wire);
+Cell cell3(2, Wire);
+Cell cell4(3, Wire);
+Cell cell5(4, Wire);
+Cell cell6(5, Wire);
+Cell cell7(6, Wire);
+Cell cell8(7, Wire);
+Cell cell9(0, Wire1);
+Cell cell10(1, Wire1);
+Cell cell11(2, Wire1);
+Cell cell12(3, Wire1);
+Cell cell13(4, Wire1);
+Cell cell14(5, Wire1);
+Cell cell15(6, Wire1);
+Cell cell16(7, Wire1);
 
 // Cell array
-Cell cells[] = {cell1, cell2, cell3, cell4, cell5, cell6, cell7, cell8};
+Cell cells[] = {cell1, cell2, cell3, cell4, cell5, cell6, cell7, cell8, cell9, cell10, cell11, cell12, cell13, cell14, cell15, cell16};
 
 
 void setupLEDs()
@@ -87,6 +95,13 @@ void setup()
     // SPI.setBitOrder(MSBFIRST);
     // SPI.setDataMode(SPI_MODE0);
 
+    // Setup mux
+    pinMode(DMM_MUX_ENABLE, OUTPUT);
+    for (int i = 0; i < 4; i++) {
+        pinMode(DMM_MUX_PINS[i], OUTPUT);
+        digitalWrite(DMM_MUX_PINS[i], LOW);
+    }
+
     delay(1000);
 
     // Initialize cells
@@ -101,13 +116,15 @@ void setup()
     FastLED.setBrightness(255);
 }
 
-float voltage = 2;
-float sum = 0.01;
+float voltage = 3.5;
 void loop()
 {
     for (Cell& cell : cells) {
         cell.setVoltage(voltage);
+        USBSerial.println(cell.getVoltage());
     }
 
-    updateStatusLEDs(cells, 8);
+    updateStatusLEDs(cells, sizeof(cells) / sizeof(cells[0]));
+
+    delay(1000);
 }