analog input capability

Template Project/lib/ESPMegaPRO/ESPMegaPRO.cpp

@@ -6,6 +6,10 @@ uint8_t inputBufferB;
 PCF8574 inputBankA(INPUT_BANK_A_ADDRESS);
 PCF8574 inputBankB(INPUT_BANK_B_ADDRESS);
 Adafruit_PWMServoDriver pwmBank = Adafruit_PWMServoDriver(PWM_BANK_ADDRESS);
+#ifdef ANALOG_CARD_ENABLE
+Adafruit_ADS1115 analogInputBankA;
+Adafruit_ADS1115 analogInputBankB;
+#endif
 
 void ESPMega_begin()
 {
@@ -19,37 +23,42 @@ void ESPMega_begin()
     // Push Pull Output is required.
     pwmBank.setOutputMode(true);
 
-    #ifdef USE_INTERRUPT
+#ifdef USE_INTERRUPT
     pinMode(INPUT_BANK_A_INTERRUPT, INPUT_PULLUP);
     pinMode(INPUT_BANK_B_INTERRUPT, INPUT_PULLUP);
-    attachInterrupt(digitalPinToInterrupt(INPUT_BANK_A_INTERRUPT),refreshInputBankA,FALLING);
-    attachInterrupt(digitalPinToInterrupt(INPUT_BANK_B_INTERRUPT),refreshInputBankB,FALLING);
-    #endif
+    attachInterrupt(digitalPinToInterrupt(INPUT_BANK_A_INTERRUPT), refreshInputBankA, FALLING);
+    attachInterrupt(digitalPinToInterrupt(INPUT_BANK_B_INTERRUPT), refreshInputBankB, FALLING);
+#endif
+
+#ifdef ANALOG_CARD_ENABLE
+    analogInputBankA.begin(ANALOG_INPUT_BANK_A_ADDRESS);
+    analogInputBankA.begin(ANALOG_INPUT_BANK_B_ADDRESS);
+#endif
 }
 
-void ESPMega_loop() {
-    
+void ESPMega_loop()
+{
 }
 
 bool ESPMega_digitalRead(int id)
 {
     if (id >= 0 && id <= 7)
     {
-        #ifndef USE_INTERRUPT
-        refreshInputBankA(); //Only poll if interrupt is not enabled
-        #endif
+#ifndef USE_INTERRUPT
+        refreshInputBankA(); // Only poll if interrupt is not enabled
+#endif
 
-        return ((inputBufferA>>id)&1); //Extract bit from buffer
+        return ((inputBufferA >> id) & 1); // Extract bit from buffer
     }
     if (id >= 8 && id <= 15)
     {
-        id-=8;
+        id -= 8;
 
-        #ifndef USE_INTERRUPT
-        refreshInputBankB(); //Only poll if interrupt is not enabled
-        #endif
+#ifndef USE_INTERRUPT
+        refreshInputBankB(); // Only poll if interrupt is not enabled
+#endif
 
-        return ((inputBufferB>>id)&1); //Extract bit from buffer
+        return ((inputBufferB >> id) & 1); // Extract bit from buffer
     }
     return false;
 }
@@ -61,7 +70,7 @@ void ESPMega_analogWrite(int id, int value)
 
 void ESPMega_digitalWrite(int id, bool value)
 {
-    if(value)
+    if (value)
         pwmBank.setPin(id, 4095);
     else
         pwmBank.setPin(id, 0);
@@ -76,3 +85,14 @@ void IRAM_ATTR refreshInputBankB()
 {
     inputBufferB = inputBankB.read8();
 }
+
+#ifdef ANALOG_CARD_ENABLE
+uint16_t ESPMega_analogRead(int id)
+{
+    if (id >= 0 && id <= 3)
+        return analogInputBankA.readADC_SingleEnded(id);
+    else if (id >= 4 && id <= 7)
+        return analogInputBankB.readADC_SingleEnded(id - 4);
+    return 0;
+}
+#endif

Template Project/lib/ESPMegaPRO/ESPMegaPRO.h

@@ -1,16 +1,21 @@
 #ifndef ESPMEGA
 #define ESPMEGA
-
+#define ANALOG_CARD_ENABLE
 #include <Arduino.h>
 #include <Wire.h>
 #include <Adafruit_PWMServoDriver.h>
 #include <PCF8574.h>
+#ifdef ANALOG_CARD_ENABLE
+#include <Adafruit_ADS1X15.h>
+#endif
 
 #define INPUT_BANK_A_ADDRESS 0x21
 #define INPUT_BANK_B_ADDRESS 0x22
 #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 USE_INTERRUPT
 #define INPUT_BANK_A_INTERRUPT 36
@@ -59,4 +64,14 @@ void ESPMega_digitalWrite(int id, bool value);
 void IRAM_ATTR refreshInputBankA();
 void IRAM_ATTR refreshInputBankB();
 
+#ifdef ANALOG_CARD_ENABLE
+/**
+ * Read one of the ESPMega Analog Card's Analog Input pins (A0-A7)
+ * 
+ * @param id The number of the pin to be read
+ * @return The value of the pin (0-4095)
+*/
+uint16_t ESPMega_analogRead(int id);
+#endif
+
 #endif

Template Project/platformio.ini

@@ -14,5 +14,9 @@ board = wt32-eth01
 framework = arduino
 ;siwats/ESPMegaPROR3@1.0.1
 lib_deps = adafruit/Adafruit PWM Servo Driver Library@^2.4.1
+           adafruit/Adafruit ADS1X15@^2.4.0
+           adafruit/Adafruit BusIO
            robtillaart/PCF8574@^0.3.7
+           arduino-libraries/Arduino_BuiltIn@^1.0.0
+           SPI
 monitor_speed = 115200

Template Project/src/analogdemo.cpp

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