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  • Author Author: phoenixcomm
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phoenixcomm


Header Pins Mapping to Arduino Megaimage

 

Header
Pins

 Color Signal Mega Pins Header
Pins		 Color Signal Mega Pins Pins.h

pinModes.h
1 RED Power Ext 30 BLACK Ground
Ext


#define INT5 5

 

#define SDA 20
#define SCL 21

 

#define CE1 44

#define CE2 36

#define CLK1 33

#define CLK2 34

#define CLS1 41

#define CLS2 37

#define FL1 46

#define FL2 45

#define RD1 35
#define RD2 43

#define RST1 32

#define RST2 47

#define WR 42

#define MISO 50
#define MOSI 51
#define SCLK52
#define CS 53

 

 

 

 

 

pinMode (INT5, INPUT);

 

pinMode (CE1, OUTPUT);

pinMode (CE2, OUTPUT);

 

pinMode (CLS1, OUTPUT);

pinMode (CLS2 OUTPUT);

 

pinMode (FL1, OUTPUT);

pinMode (FL2, OUTPUT);

 

pinMode (RD1, OUTPUT);

pinMode (RD2, OUTPUT);

 

pinMode (RST1, OUTPUT);

pinMode (RST2, OUTPUT);

 

pinMode (WR, OUTPUT);

 

pinMode (MISO, OUTPUT);

pinMode (MOSI, INPUT);

pinMode (SCLK, OUTPUT);

pinMode (CS, OUTPUT);
2 n/a n/a 29 WHITE Ground Ground
3 Blue RST1 47 28 Red RST1 32
4 Green FL! 46 27 Orange CLK1 33
5 Yellow FL2 45 26 Yellow CLK2 34
6 Orange CE1 44 25 Green RD1 35
7 Red RD2 43 24 Blue CE2 36
8 Brown WR 42 23 Purple CLS2 37
9 Green CLS1 41 22
10
11 20
12 19
13 18
14 17
15 16
I2C
BUS		 Yellow SDA 20 Orange SCL 21
CAN
BUS		 Red MISO
SO		 50 Orange MOSI
SI		 51
Yellow SCLK
SCK		 52 Green SS
CS		 53

This has been a huge pain in the rear, too, too many jump wires. The only thing that I could trust was the Header Pins as defined in the blog Rexdux v2.  So  I gripped and ripped the pins on the Mega and started over.  Below is the current revolution. First I reserved pins 53 - 50 for the CAN interface. Then I put in the stuff from the header 1-9 to the Mega starting at pin 47. Pins 20 and 21 are reserved for the I2C bus.  Pin 5 is the Interrupt for the CAN module. Pins 8 to 11 are the Front Panel Switch inputs.

The Code Base

#include <Pins.h>

char lowerBufer[8];

char upperBuffer[8];

 

int tanksMax = 8;

int tankCur =1;

 

setup () {

//Initialize serial and wait for port to open:

  Serial.begin(9600);

  while (!Serial) {

    ; // wait for serial port to connect. Needed for native USB

  }

Wire.begin();

// i2c expander = MCP23017

// We set port A to outputs, we use:

// This will be used for the Address Bus AB0 - AB4

Wire.beginTransmission(0x20);

Wire.write(0x00); // IODIRA register

Wire.write(0x00); // set all of port A to outputs

Wire.endTransmission();

 

 

// Then to set port B to outputs, we use:

// This will be used for the Data Bus DB0 - DB7

Wire.beginTransmission(0x20);

Wire.write(0x01); // IODIRB register

Wire.write(0x00); // set all of port B to outputs

Wire.endTransmission();

#include "pinModes.h"

 

resetDisplay( UPPER );

resetDisplay( LOWER );

}

void loop() {

  

}

void writeDisplay(int Display, char Data, int Address) {

     // set address on expanders A port

      

          switch ( Display ) {

          case 1:

              delay(1);

              digitalWrite(CE_U, LOW);

              delay(1);

              digitalWrite(WR, LOW);

              delay(1);

              digitalWrite(WR, HIGH);

              delay(1);

              digitalWrite(CE_U, HIGH);

              break;

           case 2:

              delay(1);

              digitalWrite(CE_L, LOW);

              delay(1);

              digitalWrite(WR, LOW);

              delay(1);

              digitalWrite(WR, HIGH);

              delay(1);

              digitalWrite(CE_L, HIGH);

              break;

          delay(1);  }}
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