led_dot.c

from [e-mail] 电路原理图和详细说明： amd.9966.org或者 arm.9966.org 都是原创,包括boot, loader,u-boot,linu

/*-------------------------------------------------------------------------------------
date:20070625
author: wkj
ver 1.0
contrl 8*8 led matrix example ,Application direct control HardWare
input:XXXXXX
output:return 0
---------------------------------------------------------------------------------------*/
#include <sys/types.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <time.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/file.h>
#include "gpio.h"
#include "main.h"
#include "io.h"
#include <stdarg.h>
#include <memory.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <signal.h>
#include "font5x7.h"
#define DEVICE_FILE_NAME "scan_keyb"


void    *map_base;      //phy 0xffff f000 virtual address

#define DEBUGMSG(x, y, args...) printf(y, ##args)


//#define DEBUGMSG(x, y, args...)
FILE *f;
int n,fd;

int main(int argc, char *argv[])
{
char num,status=0;
int i,j,count;
int ch;       
 
printf("start\n");
if((fd = open("/dev/mem", O_RDWR | O_SYNC)) == -1){
     DEBUGMSG(DEBUG_ERR, "gpio: Error opening /dev/mem\n");
     exit(-1);
		}
        //map 0xffff
map_base      = mmap(0, MAP_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, AT91_SYS);//AT91_SYS = 0xffff f000
    
*((volatile unsigned int*)(map_base + ((PIOC_OFFSET + AT91_PIO_PER )))) = 0xFFFF0000; //PC31:PC16 as gpio
*((volatile unsigned int*)(map_base + ((PIOC_OFFSET + AT91_PIO_OER )))) = 0xFFFF0000;

/*
8*8 LED mattix 
1				A
2				B
3				C
4				D
5				E
6				F
7				G
8 			        H
Data(-)			scan line(+)
D0-8-PC16		D0-1-PC31
D1-7-PC18		D1-6-PC20
D2-3-PC24		D2-A-PC30
D3-C-PC25		D3-4-PC27
D4-2-PC29		D4-H-PC17
D5-E-PC23		D5-B-PC28
D6-F-PC21		D6-G-PC19
D7-5-PC22		D7-D-PC26

*/
for(;;) //dispaly all character in Fonts lib
  { 
	*((volatile unsigned int*)(map_base + ((PIOC_OFFSET + AT91_PIO_CODR)))) = 0xFFFF0000; //0  default state
	usleep(1000000);
	for (i=0;i<8;i++) 
	  {
	      *((volatile unsigned int*)(map_base + ((PIOC_OFFSET + AT91_PIO_CODR))))
			= (0x1<<31)|(0x1<<20)|(0x1<<30)|(0x1<<27)|(0x1<<17)|(0x1<<28)|(0x1<<19)|(0x1<<26); 
	      *((volatile unsigned int*)(map_base + ((PIOC_OFFSET + AT91_PIO_SODR))))
			=(0x1<<16)|(0x1<<18)|(0x1<<24)|(0x1<<25)|(0x1<<29)
			|(0x1<<23)|(0x1<<21)|(0x1<<22);//all col light off
/*
	      //*((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_CODR))))=0xffff0000;
			//= (0x1<<31)|(0x1<<20)|(0x1<<30)|(0x1<<27)|(0x1<<17)|(0x1<<28)|(0x1<<19)|(0x1<<26); 
	      *((volatile unsigned int*)(map_base + ((PIOC_OFFSET + AT91_PIO_SODR))))
	      		= (0x1<<31);//|(0x1<<20)|(0x1<<30)|(0x1<<27)|(0x1<<17)|(0x1<<28)|(0x1<<19)|(0x1<<26); 
	      *((volatile unsigned int*)(map_base + ((PIOC_OFFSET + AT91_PIO_CODR)))) 
	      		=(0x1<<16);//|(0x1<<18)|(0x1<<24)|(0x1<<25)|(0x1<<29)
			//|(0x1<<23)|(0x1<<21)|(0x1<<22);
	      for(;;);
*/
	      switch (i)
	    	{//select which col is on
	    	  case 0://D0.PC31=1
	    	  *((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_SODR)))) = 0x1<<31; 
	    	  break;	    	  	
	    	  case 1://D1.PC20=1
	    	  *((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_SODR)))) = 0x1<<20;
	    	  break;
	    	  case 2://D2.PC30=1
	    	  *((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_SODR)))) = 0x1<<30;
	    	  break;
	    	  case 3://D3.PC27=1
	    	  *((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_SODR)))) = 0x1<<27;
	    	  break;
	          case 4://D4.PC17=1
	    	  *((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_SODR)))) = 0x1<<17;
	    	  break;
	    	  case 5://D5.PC28=1
	    	  *((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_SODR)))) = 0x1<<28;
	    	  break;
	    	  case 6://D6.PC19=1
	    	  *((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_SODR)))) = 0x1<<19;
	    	  break;
	    	  case 7://D7.PC26=1
	    	  *((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_SODR)))) = 0x1<<26;
	    	  break; 	
	        }
	      //Put on col line Fonts[i+j]

	      for (j=0;j<8;j++) //LED matrix col 0..7
	       {
	        switch (j)//col dot
	    	  {//1 mean the colum is on
	    	  case 0://D0.PC16=0
	       		*((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_CODR)))) = 0x1<<16;		
	    	  break;	    	  	
	    	  case 1:
	       		*((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_CODR)))) = 0x1<<18;		
	    	  break;	    	  	
	    	  case 2:
	       		*((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_CODR)))) = 0x1<<24;		
	    	  break;	    	  	
	    	  case 3:
	       		*((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_CODR)))) = 0x1<<25;		
	    	  break;	    	  	
	    	  case 4:
	       		*((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_CODR)))) = 0x1<<29;		
	    	  break;	    	  	
	    	  case 5:
	       		*((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_CODR)))) = 0x1<<23;		
	    	  break;	    	  	
	    	  case 6:
	       		*((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_CODR)))) = 0x1<<21;		
	    	  break;	    	  	
	    	  case 7:
	       		*((volatile unsigned long*)(map_base + ((PIOC_OFFSET + AT91_PIO_CODR)))) = 0x1<<22;		
	    	  break;	    	  	
		 }
	  	printf("%d,%d\n",i,j);
		
	  	usleep(300000);
	       }
	  }
  }
close(fd);
return 0;
}