add code comment

ESPMegaPROv3 Tester/.vscode/settings.json

@@ -0,0 +1,12 @@
+{
+    "files.associations": {
+        "array": "cpp",
+        "deque": "cpp",
+        "string": "cpp",
+        "unordered_map": "cpp",
+        "unordered_set": "cpp",
+        "vector": "cpp",
+        "string_view": "cpp",
+        "initializer_list": "cpp"
+    }
+}

ESPMegaPROv3 Tester/lib/ESPMegaPRO/ESPMegaPRO.cpp

@@ -0,0 +1,72 @@
+#include <ESPMegaPRO.h>
+
+uint8_t inputBufferA;
+uint8_t inputBufferB;
+
+PCF8574 inputBankA(INPUT_BANK_A_ADDRESS);
+PCF8574 inputBankB(INPUT_BANK_B_ADDRESS);
+Adafruit_PWMServoDriver pwmBank = Adafruit_PWMServoDriver(0x5F);
+
+void ESPMega_begin()
+{
+    Wire.begin(14, 33);
+
+    inputBankA.begin();
+    inputBankB.begin();
+    pwmBank.begin();
+
+    #ifdef USE_INTERRUPT
+    attachInterrupt(digitalPinToInterrupt(INPUT_BANK_A_INTERRUPT),refreshInputBankA,FALLING);
+    attachInterrupt(digitalPinToInterrupt(INPUT_BANK_B_INTERRUPT),refreshInputBankB,FALLING);
+    #endif
+}
+
+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
+
+        return ((inputBufferA>>id)&1); //Extract bit from buffer
+    }
+    if (id >= 8 && id <= 15)
+    {
+        id-=8;
+
+        #ifndef USE_INTERRUPT
+        refreshInputBankB(); //Only poll if interrupt is not enabled
+        #endif
+
+        return ((inputBufferB>>id)&1); //Extract bit from buffer
+    }
+    return false;
+}
+
+void ESPMega_analogWrite(int id, int value)
+{
+    pwmBank.setPin(id, value);
+}
+
+void ESPMega_digitalWrite(int id, bool value)
+{
+    if(value)
+        pwmBank.setPin(id, 4095);
+    else
+        pwmBank.setPin(id, 0);
+}
+
+void IRAM_ATTR refreshInputBankA()
+{
+    inputBufferA = inputBankA.read8();
+}
+
+void IRAM_ATTR refreshInputBankB()
+{
+    inputBufferB = inputBankB.read8();
+}

ESPMegaPROv3 Tester/lib/ESPMegaPRO/ESPMegaPRO.h

@@ -0,0 +1,61 @@
+#ifndef ESPMEGA
+#define ESPMEGA
+
+#include <Arduino.h>
+#include <Wire.h>
+#include <Adafruit_PWMServoDriver.h>
+#include <PCF8574.h>
+
+#define INPUT_BANK_A_ADDRESS 0x20
+#define INPUT_BANK_B_ADDRESS 0x21
+#define OUTPUT_BANK_ADDRESS 0x21
+#define EEPROM_ADDRESS 0x22
+
+//#define USE_INTERRUPT
+//#define INPUT_BANK_A_INTERRUPT 35
+//#define INPUT_BANK_B_INTERRUPT 39
+
+/**
+ * Initiate ESPMega PRO Internal Components
+ * 
+ * This function will initiate the PWM bank, Input banks, and the EEPROM.
+*/
+void ESPMega_begin();
+
+/**
+ * Run ESPMega PRO Internal Routines
+ * 
+ * This function must be called regularly for the correct
+ * operation of the ESPMega!
+*/
+void ESPMega_loop();
+
+/**
+ * Read one of the ESPMega's Digital Input pins (I0-I15)
+ * 
+ * @param id The number of the pin to be read
+ * @return The state of the pin (HIGH/LOW)
+*/
+bool ESPMega_digitalRead(int id);
+
+/**
+ * Write a pulse wave modulated signal to one of the ESPMega's
+ * PWM pins (P0-P15)
+ * 
+ * @param id The number of the pin to write to
+ * @param value the "HIGH" duty cycle of the PWM wave (0-4095)
+*/
+void ESPMega_analogWrite(int id, int value);
+
+/**
+ * Write a digital signal to one of the ESPMega's
+ * PWM pins (P0-P15)
+ * 
+ * @param id The number of the pin to write to
+ * @param value the new state for the pin (HIGH/LOW)
+*/
+void ESPMega_digitalWrite(int id, bool value);
+void IRAM_ATTR refreshInputBankA();
+void IRAM_ATTR refreshInputBankB();
+
+#endif

ESPMegaPROv3 Tester/platformio.ini

@@ -12,4 +12,5 @@
 platform = espressif32
 board = wt32-eth01
 framework = arduino
-lib_deps = robtillaart/PCA9685@^0.4.1
+lib_deps = adafruit/Adafruit PWM Servo Driver Library@^2.4.1
+           robtillaart/PCF8574@^0.3.7

ESPMegaPROv3 Tester/src/i2c_scanner.cpp.disabled

@@ -0,0 +1,84 @@
+#include <Arduino.h>
+// --------------------------------------
+// i2c_scanner
+//
+// Version 1
+//    This program (or code that looks like it)
+//    can be found in many places.
+//    For example on the Arduino.cc forum.
+//    The original author is not know.
+// Version 2, Juni 2012, Using Arduino 1.0.1
+//     Adapted to be as simple as possible by Arduino.cc user Krodal
+// Version 3, Feb 26  2013
+//    V3 by louarnold
+// Version 4, March 3, 2013, Using Arduino 1.0.3
+//    by Arduino.cc user Krodal.
+//    Changes by louarnold removed.
+//    Scanning addresses changed from 0...127 to 1...119,
+//    according to the i2c scanner by Nick Gammon
+//    https://www.gammon.com.au/forum/?id=10896
+// Version 5, March 28, 2013
+//    As version 4, but address scans now to 127.
+//    A sensor seems to use address 120.
+// Version 6, November 27, 2015.
+//    Added waiting for the Leonardo serial communication.
+//
+//
+// This sketch tests the standard 7-bit addresses
+// Devices with higher bit address might not be seen properly.
+//
+ 
+#include <Wire.h>
+ 
+ 
+void setup()
+{
+  Wire.begin(14,33);
+ 
+  Serial.begin(9600);
+  while (!Serial);             // Leonardo: wait for serial monitor
+  Serial.println("\nI2C Scanner");
+}
+ 
+ 
+void loop()
+{
+  byte error, address;
+  int nDevices;
+ 
+  Serial.println("Scanning...");
+ 
+  nDevices = 0;
+  for(address = 1; address < 127; address++ )
+  {
+    // The i2c_scanner uses the return value of
+    // the Write.endTransmisstion to see if
+    // a device did acknowledge to the address.
+    Wire.beginTransmission(address);
+    error = Wire.endTransmission();
+ 
+    if (error == 0)
+    {
+      Serial.print("I2C device found at address 0x");
+      if (address<16)
+        Serial.print("0");
+      Serial.print(address,HEX);
+      Serial.println("  !");
+ 
+      nDevices++;
+    }
+    else if (error==4)
+    {
+      Serial.print("Unknown error at address 0x");
+      if (address<16)
+        Serial.print("0");
+      Serial.println(address,HEX);
+    }    
+  }
+  if (nDevices == 0)
+    Serial.println("No I2C devices found\n");
+  else
+    Serial.println("done\n");
+ 
+  delay(5000);           // wait 5 seconds for next scan
+}

ESPMegaPROv3 Tester/src/input_demo.cpp.disabled

@@ -0,0 +1,22 @@
+#include <Arduino.h>
+#include <PCF8574.h>
+
+PCF8574 inputbank1(0x21);
+
+void setup() {
+    Wire.begin(14,33);
+    Serial.begin(9600);
+    boolean connected = inputbank1.begin();
+    Serial.println("connection state = "+String(connected));
+    inputbank1.write(0, HIGH);
+    delay(50);
+    inputbank1.write(1, HIGH);
+    delay(50);
+}
+
+void loop() {
+    for(int i=2;i<8;i++) {
+        Serial.println(inputbank1.read(i));
+        delay(100);
+    }
+}

ESPMegaPROv3 Tester/src/main.cpp

@@ -1,32 +1,11 @@
-#include <Arduino.h>
-#include "Wire.h"
-#include "PCA9685.h"
-
-PCA9685 PCA(0x5F);
+#include <ESPMegaPRO.h>
 
 void setup() {
-  Wire.begin();
-  PCA.begin();
-
+    ESPMega_begin();
 
     
 }
 
-  void loop() {
-  PCA.digitalWrite(0,HIGH);
-  PCA.digitalWrite(1,LOW);
-  PCA.setPWM(2, 450);
-  PCA.setPWM(3, 600);
-  PCA.setPWM(4, 750);
-  PCA.setPWM(5, 900);
-  PCA.setPWM(6, 1050);
-  PCA.setPWM(7, 1200);
-  PCA.setPWM(8, 1350);
-  PCA.setPWM(9, 1500);
-  PCA.setPWM(10, 1650);
-  PCA.setPWM(11, 1800);
-  PCA.setPWM(12, 1950);
-  PCA.setPWM(13, 2100);
-  PCA.setPWM(14, 2250);
-  PCA.setPWM(15, 2400);
+void loop() {
+    ESPMega_loop();
 }

ESPMegaPROv3 Tester/src/pwm_demo.cpp.disabled

@@ -0,0 +1,28 @@
+#include <Arduino.h>
+#include "Wire.h"
+#include <Adafruit_PWMServoDriver.h>
+
+Adafruit_PWMServoDriver pwm = Adafruit_PWMServoDriver(0x5F);
+
+void setup() {
+  Wire.begin(14,33);
+  pwm.begin();
+  pwm.setPin(2, 500);
+  pwm.setPin(3, 1000);
+  pwm.setPin(4, 1500);
+  pwm.setPin(5, 2000);
+  pwm.setPin(6, 2500);
+  pwm.setPin(7, 3000);
+  pwm.setPin(8, 3500);
+  pwm.setPin(9, 4000);
+  pwm.setPin(10, 500);
+  pwm.setPin(11, 1000);
+  pwm.setPin(12, 1500);
+  pwm.setPin(13, 2000);
+  pwm.setPin(14, 2500);
+  pwm.setPin(15, 3000);
+
+}
+
+  void loop() {
+}