#include <ds18b20.h>
#include<1wire.c>
#include <lcd.c>
#include<DS1820.c>
void main()
{
set_tris_a(0xff);
set_tris_c(0xff);
long int a,b,c,d,m,n,o;
float e;
//lcd_init();
while(TRUE)
{
//long int h[]={ 0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F};
int h[]={0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x83, 0xf8, 0x80, 0x98};
output_high(pin_a2);
m=ds1820_read();
// m=126;
a=m/100;
b=m%100;
c=b/10;
d=b%10;
//for(o=0;o<20;o++){
for(n=0;n<10;n++)
{
output_low(pin_a0);
output_high(pin_a2);
output_high(pin_a1);
//output_low(pin_a4);
output_c(h[c]);
delay_ms(1);
}
for(n=0;n<10;n++)
{
output_low(pin_a1);
output_high(pin_a2);
output_high(pin_a0);
//output_low(pin_a4);
output_c(h[a]);
delay_ms(1);
}
for(n=0;n<10;n++)
{
output_low(pin_a2);
output_high(pin_a1);
output_high(pin_a0);
//output_low(pin_a3);
output_c(h[d]);
delay_ms(1);
}
//}
}
}
#ifndef ONE_WIRE_C
#define ONE_WIRE_C
/*
* One wire (1-wire) driver for CCS C compiler. Suitable for use with devices
* such as the DS18B20 1-wire digital temperature sensor.
*/
#define ONE_WIRE_PIN PIN_A3
/*
* onewire_reset()
* Description: Initiates the one wire bus.
*/
// OK if just using a single permanently connected device
void onewire_reset() {
output_low(ONE_WIRE_PIN); // pull the bus low for reset
delay_us(500);
output_float(ONE_WIRE_PIN); // float the bus high
delay_us(500); // wait-out remaining initialisation window
output_float(ONE_WIRE_PIN);
}
/*
* onewire_write(int8 data)
* Arguments: a byte of data.
* Description: writes a byte of data to the device.
*/
void onewire_write(int8 data) {
int8 count;
for(count = 0; count < 8; ++count) {
output_low(ONE_WIRE_PIN);
delay_us(2); // pull 1-wire low to initiate write time-slot.
output_bit(ONE_WIRE_PIN, shift_right(&data, 1, 0)); // set output bit on 1-wire
delay_us(60); // wait until end of write slot.
output_float(ONE_WIRE_PIN); // set 1-wire high again,
delay_us(2); // for more than 1us minimum.
}
}
/*
* onewire_read()
* Description: reads and returns a byte of data from the device.
*/
int onewire_read() {
int count, data;
for(count = 0; count < 8; ++count) {
output_low(ONE_WIRE_PIN);
delay_us(2); // pull 1-wire low to initiate read time-slot.
output_float(ONE_WIRE_PIN); // now let 1-wire float high,
delay_us(8); // let device state stabilise,
shift_right(&data, 1, input(ONE_WIRE_PIN)); // and load result.
delay_us(120); // wait until end of read slot.
}
return data;
}
#endif /*ONE_WIRE_C*/
#ifndef DS1820_C
#define DS1820_C
#include "1wire.c"
float ds1820_read();
void ds1820_configure(int8 TH, int8 TL, int8 config);
/*
* ds1820_read()
* Description: reads the ds18x20 device on the 1-wire bus and returns
* the temperature
*/
float ds1820_read() {
int8 busy=0, temp1, temp2;
signed int16 temp3;
float result;
//ds1820_configure(0x00, 0x00, 0x00); //9 bit resolution
onewire_reset();
onewire_write(0xCC); //Skip ROM, address all devices
onewire_write(0x44); //Start temperature conversion
while(busy == 0) //Wait while busy (bus is low)
busy = onewire_read();
onewire_reset();
onewire_write(0xCC); //Skip ROM, address all devices
onewire_write(0xBE); //Read scratchpad
temp1 = onewire_read();
temp2 = onewire_read();
temp3 = make16(temp2, temp1);
//result = (float) temp3 / 2.0; //Calculation for DS18S20 with 0.5 deg C resolution
result = (float) temp3 / 16.0; //Calculation for DS18B20
delay_ms(200);
return(result);
}
/*
* ds1820_configure(int8 TH, int8 LH, int8 config)
* Description: writes configuration data to the DS18x20 device
* Arguments: alarm trigger high, alarm trigger low, configuration
*/
void ds1820_configure(int8 TH, int8 TL, int8 config) {
onewire_reset();
onewire_write(0xCC); //Skip ROM, address all devices
onewire_write(0x4E); //Write to scratchpad
onewire_write(TH);
onewire_write(TL);
onewire_write(config);
}
#endif /*DS1820_C*/
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