therm-led/main.c

#include <avr/io.h>
#include <util/delay.h>
#include <avr/pgmspace.h>
#include <string.h>
#include "led.h"
#include "1wire.h"

//__attribute__ ((section (".noinit"))) unsigned char initst;

__attribute__ ((section (".noinit"))) union {
	unsigned int t;
	struct {
		unsigned char l;
		unsigned char h;
	};
} t;

/*register unsigned char error asm("r3");

inline void gettemp(void){
	//if(!owtimer){
		error = _1WireInit();
		if(error!=1) return;
		_1WireWriteByte(0xcc); //skip rom
		_1WireWriteByte(0xbe); //odczyt
		t.l = _1WireReadByte();
		t.h = _1WireReadByte();
		t.t *= (int)(0.625*16);
		t.t >>= 4;
		_1WireInit();
		_1WireWriteByte(0xcc); //skip rom
		_1WireWriteBytePR(0x44); //start
	//	owtimer = xxx;
	//}
}
*/


void __jumpMain(void) __attribute__ ((naked)) __attribute__ ((section (".vectors")));

void __jumpMain(void){   
	asm volatile ( ".set __stack, %0" :: "i" (RAMEND) );
	SP = RAMEND;
	asm volatile ( "clr __zero_reg__" );	// r1 set to 0
	asm volatile ( "rjmp main" );		// jump to main()
} 

unsigned char div(unsigned int a, unsigned int d){
	unsigned int x=0;
	while(a>d){
		a-=d;
		x++;
	}
	while(x>=10) x-=10;
	return x;
}

__attribute__ ((section (".noinit"))) unsigned char czuj[5][8];
__attribute__ ((section (".noinit"))) unsigned char rom[8];

void main(void) __attribute__((noreturn));
void main(void){
	disp_init();
	register signed int temp;
	register signed int tt;
	unsigned char error;
	unsigned char li=0,x;

	unsigned char i=0, rv;

	for(;;){
		//gettemp();

		//_1WirePoweroff();
		error = _1WireInit();
		//if(error!=1) continue;
		//_1WireWriteByte(0xcc); //skip rom
		_1WireWriteByte(0x55);
		_1WireSendRom(czuj[li]);
		_1WireWriteByte(0xbe); //odczyt
		t.l = _1WireReadByte();
		t.h = _1WireReadByte();
		//tt = (t.t*(int)(0.625*16))>>4;
		tt = (signed int)((t.t<<3) + (t.t<<1)) >> 4;

		if(++li>i){
			li=0;
			i=0; rv=0;
			do {
				rv = _1WireSearch(rv, rom);
				for(x=0;x<8;x++) czuj[i][x] = rom[x];
			//	memcpy(czuj[i], rom, 8);
				i++;
			} while(rv && i<5);
			i--;
			_1WireInit();
			_1WireWriteByte(0xcc); //skip rom
			_1WireWriteBytePR(0x44); //start
		}

		/*if(error!=1){
			putchar(14); //b
			putchar(11); //ł
			putchar(13); //a
			putchar(16); //d
			putchar(17);
			putchar(17);
			putchar(17);
			
			putchar(error);
			display();
		} else {*/
			//clear();
		/*	putchar(14);
			putchar(14);
			putchar(14);*/

			if(error!=1){
				putchar(14);
				putchar(14);
				putchar(21);
				putchar(error);
				display();
				continue;
			}

			temp = tt;
			if(i){
				x = 16+li;
		//		if(li==0) x=16;else x=17;
			} else x=14;
			putchar(x);

			if(temp < 0){
				putchar(15); //-
				temp = -temp;
			} else if(temp>1000) putchar(div(temp,1000)); else putchar(14);
			if(temp>100) putchar(div(temp,100)); else putchar(14);
			putchar(div(temp,10));
			putchar(12); //,
			putchar(div(temp,1));
			putchar(10); //°

			/*if(i){
				if(li) x=16; else x=17;
			} else x=10;
			putchar(x);*/


			putchar(13); //C	


			display();
			_delay_ms(3000);
	//	}
	}
}