manx86

/*------------------- ADC_driver -----------------------------------  PURPOSE - Gives one sensor reading    COMPILE to binary st as below-            gcc -o run_ADC ADC_driver_rev4.c  RUN       ./lp_tty_start ./ADC_driver_rev4*///#include <asm/io.h>#include <sys/io.h>#include <sys/time.h>#include <stdio.h>#include <stdlib.h>//------- Parallel port data.static short lp_base_addr;#define status_offset  1#define control_offset 2#define high 1#define low  0//-------Parallel port pins-------------------------#define CS         0x02 //pin 3#define CLK        0x01 //pin 2#define all_low    0x00static char save_data ;    // save of original values.static char save_control ;static char image_data ;   // use image as master record of port.static char image_control ;int DOUT = 0;short cycle = 0;// init du port parallèlevoid lp_init() {    printf("lp_init()\n");   lp_base_addr = 0x378 ;   image_data    = save_data    = inb( lp_base_addr) ;   image_control = save_control = inb( lp_base_addr+2) ;   outb( (image_control &= 0xEF),  lp_base_addr + control_offset) ; }// restore du port parallèlevoid lp_restore(){   printf("lp_restore()\n");   outb( save_data,    lp_base_addr) ;   outb( save_control, lp_base_addr + control_offset);}int horloge(char lecture){	printf("horloge()\n");	short clk = 0;	outb(all_low, lp_base_addr); // tout à 0	if(lecture == 0);	{		for(clk=1; clk<=8; clk++)		{			outb(0, lp_base_addr);			outb(CLK, lp_base_addr);		//	printf("clk %d\n", clk);		}	}	else if(lecture == 1);	{		for(clk=1; clk<=8; clk++)		{			outb(0, lp_base_addr);			outb(CLK, lp_base_addr);		//	printf("clk %d\n", clk);		}	}	else	{		return(0);	}	outb(CS, lp_base_addr); // CS à 1	usleep(500000); // attente de 500000µs (500ms)	outb(0, lp_base_addr); //CS à 0}/*void horloge_lecture(){	printf("horloge()\n");	short clk = 0;	outb(all_low, lp_base_addr); // tout à 0	for(cycle=1; cycle <=2; cycle++)	{		outb(CS, lp_base_addr); // CS à 1	//	sleep(1); //attente de 1s		usleep(500000); // attente de 500000µs (500ms)		outb(0, lp_base_addr); //CS à 0		for(clk=1; clk<=8; clk++)		{		  outb(0, lp_base_addr);		  outb(CLK, lp_base_addr);	//	  printf("clk %d\n", clk);		}	printf("fin du cycle d\'horloge %d\n", cycle);		outb(CS, lp_base_addr); // CS à 1	usleep(500000); // attente de 500000µs (500ms)	outb(0, lp_base_addr); //CS à 0		horloge_clk(0); // cycle d'horloge	horloge_clk(1); // horloge + lecture	}}*//*int lecture(){	printf("lecture()\n");	ordre[8] ={6,5,4,3,2,1,0,7};		return(DOUT);}*/void affichage(){	printf("affichage()\n");	if(DOUT != 4095)	{	  printf("Tension: %d\n", DOUT);	}	else	printf("Lecture impossible\n");	usleep(500000);}int main(){	lp_init(); //init du port parallèle	short i = 0;	for(i=0; i<1; i++)	{		//horloge_lecture();		horloge_clk(0); // cycle d'horloge		horloge_clk(1); // horloge + lecture	}	affichage();//	lp_restore(); // restauration du port parallèle	return(0);}