#include "SPImaster.h"
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include "Ports.h"

using namespace std;
  
void RaiseSS(){
  //SS is pin 5 of LPT1 - output
  char Data;
  Data=InPort(LPT1);
  Data=(Data|SS);
  OutPort(LPT1,Data);
  return;
}

void LowerSS(){
  //SS is pin 5 of LPT1 - output
  char Data;
  Data=InPort(LPT1);
  Data=Data&(~SS);
  OutPort(LPT1,Data);
  return;
}

//SendByte - in SPI MASTER fashion
//will READ a byte everytime it writes a byte
char SendByte(char byte){
  //CLOCK is on pin 4 of LPT1-output
  //MISO is on pin 11 of LPT1 -input
  //MOSI is on pin 3 of LPT1  -output
  //SS is pin 5 of LPT1 - output
  char bit;
  char input=0,bitin;
  int i;
  char Data;
  byte=bitswap(byte);
  Data=InPort(LPT1);
  
  
  //get first bit to send
  for(i=0;i<8;i++){
    bit=byte & 1;
    byte = byte >> 1;
    bit=bit<<1;
    //lower CLOCK
    Data=Data&~CLOCK;
    OutPort(LPT1,Data);
    //put DATA on MOSI line
    Data=((Data&~MOSI)|bit);
    OutPort(LPT1,Data);
    //raise CLOCK
    Data=Data|CLOCK;
    //cout<<(unsigned short)bit;
    OutPort(LPT1,Data);
    bitin=(((InPort(LPT1+1)^MISO)&MISO)>>7);
    input=input|bitin;
    if(i!=7)
    input=input<<1;    
  }
  //Raise Data - acting like a pull-up resistor
  //cout<<endl;
  Data=Data|MOSI;
  OutPort(LPT1,Data);
  return input;
}

void FileBitSwap(char *filename, char *fileout){
  FILE *input, *output;
  char value;
  input=fopen(filename,"rb");
  output=fopen(fileout,"wb");
  
  while(feof(input)==0){
      value=fgetc(input);
      value=bitswap(value);
      fputc(value , output);
    }
  fclose(input);
  fclose(output);
 }
  
char bitswap(char byte){
  char temp=0;
  for(int i=0;i<8;i++){
    temp=temp<<1;
    temp=temp | (byte & 1);
    byte=byte>>1;
  }
return temp;
}