add Analog Functionality

Template Project/lib/ESPMegaPRO/ESPMegaPRO.cpp

@@ -9,6 +9,10 @@ Adafruit_PWMServoDriver pwmBank = Adafruit_PWMServoDriver(PWM_BANK_ADDRESS);
 #ifdef ANALOG_CARD_ENABLE
 Adafruit_ADS1115 analogInputBankA;
 Adafruit_ADS1115 analogInputBankB;
+MCP4725 DAC0(DAC0_ADDRESS);
+MCP4725 DAC1(DAC1_ADDRESS);
+MCP4725 DAC2(DAC2_ADDRESS);
+MCP4725 DAC3(DAC3_ADDRESS);
 #endif
 
 void ESPMega_begin()
@@ -32,7 +36,11 @@ void ESPMega_begin()
 
 #ifdef ANALOG_CARD_ENABLE
     analogInputBankA.begin(ANALOG_INPUT_BANK_A_ADDRESS);
-    analogInputBankA.begin(ANALOG_INPUT_BANK_B_ADDRESS);
+    analogInputBankB.begin(ANALOG_INPUT_BANK_B_ADDRESS);
+    DAC0.begin();
+    DAC1.begin();
+    DAC2.begin();
+    DAC3.begin();
 #endif
 }
 
@@ -87,12 +95,31 @@ void IRAM_ATTR refreshInputBankB()
 }
 
 #ifdef ANALOG_CARD_ENABLE
-uint16_t ESPMega_analogRead(int id)
+int16_t ESPMega_analogRead(int id)
 {
     if (id >= 0 && id <= 3)
-        return analogInputBankA.readADC_SingleEnded(id);
+        return analogInputBankA.readADC_SingleEnded(3-id);
     else if (id >= 4 && id <= 7)
-        return analogInputBankB.readADC_SingleEnded(id - 4);
+        return analogInputBankB.readADC_SingleEnded(7-id);
     return 0;
 }
+void ESPMega_dacWrite(int id, int value) {
+    switch (id)
+    {
+    case 0:
+        DAC0.setValue(value);
+        break;
+    case 1:
+        DAC1.setValue(value);
+        break;
+    case 2:
+        DAC2.setValue(value);
+        break;    
+    case 3:
+        DAC3.setValue(value);
+        break;
+    default:
+        break;
+    }
+}
 #endif

Template Project/lib/ESPMegaPRO/ESPMegaPRO.h

@@ -7,6 +7,7 @@
 #include <PCF8574.h>
 #ifdef ANALOG_CARD_ENABLE
 #include <Adafruit_ADS1X15.h>
+#include <MCP4725.h>
 #endif
 
 #define INPUT_BANK_A_ADDRESS 0x21
@@ -14,8 +15,12 @@
 #define PWM_BANK_ADDRESS 0x5F
 #define OUTPUT_BANK_ADDRESS 0x21
 #define EEPROM_ADDRESS 0x22
-#define ANALOG_INPUT_BANK_A_ADDRESS 0x60
-#define ANALOG_INPUT_BANK_B_ADDRESS 0x61
+#define ANALOG_INPUT_BANK_A_ADDRESS 0x48
+#define ANALOG_INPUT_BANK_B_ADDRESS 0x49
+#define DAC0_ADDRESS 0x60
+#define DAC1_ADDRESS 0x61
+#define DAC2_ADDRESS 0x62
+#define DAC3_ADDRESS 0x63
 
 //#define USE_INTERRUPT
 #define INPUT_BANK_A_INTERRUPT 36
@@ -71,7 +76,15 @@ void IRAM_ATTR refreshInputBankB();
  * @param id The number of the pin to be read
  * @return The value of the pin (0-4095)
 */
-uint16_t ESPMega_analogRead(int id);
+int16_t ESPMega_analogRead(int id);
+/**
+ * Write a True Analog Signal to one of the ESPMega Analog Card's
+ * Analog Output pins (AO0-AO3)
+ * 
+ * @param id The number of the pin to write to
+ * @param value the analog value of the pin (0-4095)
+*/
+void ESPMega_dacWrite(int id, int value);
 #endif
 
 #endif

Template Project/platformio.ini

@@ -19,4 +19,5 @@ lib_deps = adafruit/Adafruit PWM Servo Driver Library@^2.4.1
            robtillaart/PCF8574@^0.3.7
            arduino-libraries/Arduino_BuiltIn@^1.0.0
            SPI
+           robtillaart/MCP4725@^0.3.7
 monitor_speed = 115200

Template Project/src/analogdemo.cpp

@@ -1,10 +1,14 @@
 #include <ESPMegaPRO.h>
-void setup() {
-    ESPMega_begin();
+
+void setup()
+{
     Serial.begin(115200);
+    ESPMega_begin();
+    ESPMega_dacWrite(0,2000);
+    ESPMega_dacWrite(1,2000);
 }
 
-void loop() {
-    int a0 = ESPMega_analogRead(0);
-    Serial.println(a0);
+void loop()
+{
+    delay(100);
 }