Testing, reading and writing bytes

ROMWireProtocol.cpp

@@ -0,0 +1,99 @@
+#include "ROMWireProtocol.h"
+
+//#include <Arduino.h>
+
+void setCtrlPins() {
+  pinMode(OE, OUTPUT);
+  pinMode(PGM, OUTPUT);
+}
+
+void setAddrPinsOut() {
+  for(int a = Addr0; a <= Addr18; a++) {
+    pinMode(a, OUTPUT);
+    digitalWrite(a, LOW);
+  }
+}
+
+void setDataPinsOut() {
+  for(int d = Data0; d <= Data7; d++) {
+    pinMode(d, OUTPUT);
+    digitalWrite(d, LOW);
+  }
+}
+
+void setDataPinsIn() {
+  for(int d = Data0; d <= Data7; d++) {
+    digitalWrite(d, LOW);
+    pinMode(d, INPUT);
+  }
+}
+
+void setByte(byte out) {
+  for(int i = 0; i < 8; i++) {
+    digitalWrite(Data0 + i, bitRead(out,i));
+  }
+}
+
+void setAddress(unsigned long addr) {
+  for(int i = 0; i < 19; i++) {
+    digitalWrite(Addr0 + i, bitRead(addr, i) );
+  }
+}
+
+byte readByte() {
+  byte temp_in = 0;
+  for(int i = 0; i < 8; i++) {
+    if(digitalRead(Data0 + i)) {
+      bitSet(temp_in, i);
+    }
+  }
+
+  return temp_in;
+}
+
+byte readData(unsigned long address) {
+  byte temp_read;
+  setByte(0);
+  setDataPinsIn();
+
+  digitalWrite(PGM, HIGH);
+  digitalWrite(OE, HIGH);
+
+  setAddress(address);
+  delayMicroseconds(3);
+
+  digitalWrite(OE, LOW);
+  delayMicroseconds(3);
+
+  temp_read = readByte();
+
+  return temp_read;
+}
+
+void writeByte(byte data, unsigned long address) {
+  setAddress(address);
+  setByte(data);
+
+  digitalWrite(OE, HIGH);
+  digitalWrite(PGM, HIGH);
+
+  delayMicroseconds(2);
+
+  digitalWrite(PGM, LOW);
+  delayMicroseconds(1);
+  digitalWrite(PGM, HIGH);
+}
+
+void programData(byte data, unsigned long address) {
+  setDataPinsOut();
+
+  writeByte(0xAA, 0x5555);
+  writeByte(0x55, 0x2AAA);
+  writeByte(0xA0, 0x5555);
+  writeByte(data, address);
+
+  delayMicroseconds(30);
+
+  //Serial.println(data, HEX);
+  //Serial.println(address, HEX);
+}