driver.c

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#include <ez8.h>
#include "main.h"
#include "driver.h"

void adbusoutput(char c){
  ADBUSOUT = c;
}

void adress_enable_on(){
  char bus = CONTROLBUSIN;
  CONTROLBUSOUT = bus | 0x01;
}

void adress_enable_off(){
  char bus = CONTROLBUSIN;
  CONTROLBUSOUT = bus & 0xFE;
}

void adress_decode_on(){
  char bus = CONTROLBUSIN;
  CONTROLBUSOUT = bus | 0x02;
}

void adress_decode_off(){
  char bus = CONTROLBUSIN;
  CONTROLBUSOUT = bus & 0xFD;
}

void output_function_enable_on(){
  char bus = CONTROLBUSIN;
  CONTROLBUSOUT = bus | 0x04;
}

void output_function_enable_off(){
  char bus = CONTROLBUSIN;
  CONTROLBUSOUT = bus & 0xFB;
}

void input_function_enable_on(){
  char bus = CONTROLBUSIN;
  CONTROLBUSOUT = bus | 0x10;
}

void input_function_enable_off(){
  char bus = CONTROLBUSIN;
  CONTROLBUSOUT = bus & 0xEF;
}

void deselect_board_on(){
  char bus = CONTROLBUSIN;
  CONTROLBUSOUT = bus | 0x08;
}

void deselect_board_off(){
  char bus = CONTROLBUSIN;
  CONTROLBUSOUT = bus & 0xF7;
}

void adressingboard(char id){
  adbusoutput(id);
  adress_enable_on();
  adress_decode_on();
  adress_decode_off();
  adress_enable_off();
}

void byteout(char data){
  adbusoutput(data);
  output_function_enable_on();
  output_function_enable_off();
}

char bytein(){
  char inputchar;
  setadbustoinput();
  input_function_enable_on();
  inputchar = ADBUSIN;
  input_function_enable_off();
  setadbustooutput();
  return inputchar;
}

char singleadconverting(){
  ADCCTL = 0xb8;
  while(ADCCTL & 128);
  return ADCDH;
}

void dob(char id, char data){
  adressingboard(id);
  byteout(data);
}

char dib(char id){
  adressingboard(id);
  return bytein();
}

void aob(char id, char data){
  adressingboard(id);
  byteout(data);
}

char aib(){
  int result;
  result = singleadconverting();
  return result;
}

/*
void longdelay(){
  if(delaycycles){
    int delay;
    for(delay=delaycycles;delay;delay--);
  }
}
char nightridertest(){
  char i;
  if(i==0){
    i++;
  }
  i = i<<1;
}

void testcontrols(){
  deselect_board_on();
  adress_enable_on();
  adress_decode_on();
  output_function_enable_on();  
  input_function_enable_on();
  deselect_board_off();
  adress_enable_off();
  adress_decode_off();
  output_function_enable_off();         
  input_function_enable_off();
}
*/
void setadcinputs(){
  PHADDR = 0x01;
  PHCTL  = 0XFF;
  PHADDR = 0x02;
  PHCTL  = 0XFF;
  PHADDR = 0x00;
}

void setadbustoinput(){
  PGADDR = 0x01;
  PGCTL  = 0XFF;
  PGADDR = 0x00;
}

void setadbustooutput(){
  PGADDR = 0x01;
  PGCTL  = 0X00;
  PGADDR = 0x00;
}

void bussetup(){
  PEADDR = 0x01;
  PECTL  = 0X00;
  PEADDR = 0x00;
  setadbustooutput();
  setadcinputs();
  CONTROLBUSOUT = 0x00;
  ADBUSOUT = 0x00;
  deselect_board_on();
  deselect_board_off();
}

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