Subversion Repositories svnkaklik

Rev

Go to most recent revision | Details | Last modification | View Log

Rev Author Line No. Line
385 kakl 1 
/*****************************************************************************/
2 
/*
3 
 *  Zmena I2C adresy
4 
 *
5 
 *      Copyright (C) 2007 KAKL, KAKLIK
6 
 *
7 
 *      This program is free software; you can redistribute it and/or modify
8 
 *      it under the terms of the GNU General Public License as published by
9 
 *      the Free Software Foundation; either version 2 of the License, or
10 
 *      (at your option) any later version.
11 
 *
12 
 *      This program is distributed in the hope that it will be useful,
13 
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
14 
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 
 *      GNU General Public License for more details.
16 
 *
17 
 */
18 
/*****************************************************************************/
19 
 
20 
#include <iostream>
21 
#include <getopt.h>
22 
#include <errno.h>
23 
#include <string.h>
24 
#include <stdio.h>
25 
#include <stdlib.h>
26 
#include <unistd.h>
27 
#include "linux/i2c-dev.h"
28 
#include "linux/i2c.h"
29 
#include <sys/ioctl.h>
30 
#include <sys/types.h>
31 
#include <sys/stat.h>
32 
#include <fcntl.h>
33 
 
34 
using namespace std;
35 
 
36 
 
37 
#define BC_Addr	    0x0B
38 
 
39 
int file;
40 
 
41 
void I2C_addr (int Addr)
42 
{
43 
    if (ioctl(file, I2C_SLAVE, Addr) == -1)
44 
    {
45 
        fprintf(stderr, "Failed to set address to 0x%02x.\n", Addr);
46 
        exit(-5);
47 
    }
48 
}
49 
 
50 
 
51 
unsigned int echo(int Addr)  // precte vzdalenost z US cidla
52 
{
53 
    char Buf[3];
54 
 
55 
    I2C_addr(Addr);
56 
    Buf[0]=0x0;
57 
    Buf[1]=0x51;
58 
    write(file, Buf, 2);
59 
    usleep(80000);
60 
    read(file, Buf, 3);
61 
    return (Buf[1]*256+Buf[2]);
62 
}
63 
 
64 
int i2c_init()   // zinicializuje i2c
65 
{
66 
	file = open("/dev/i2c-0", O_RDWR);
67 
	if (file < 0)
68 
	{
69 
		cerr << "Could not open /dev/i2c-0." << endl;
70 
		return -1;
71 
	}
72 
	return 0;
73 
}
74 
 
75 
int main(int argc, char *argv[], char *envp[])
76 
{
77 
    unsigned int OldAddress, NewAddress;
78 
    char Buf[10];
79 
 
80 
	fprintf(stdout, "\n **** Change I2C Address **** \n \r");
81 
 
82 
    if (argc<2)
83 
    {
84 
        printf("Use:\n%s OldAddress NewAddress - for change address\nOR\n%s Address - for echo\n\n\r",argv[0],argv[0]);
85 
        return 0;
86 
    }
87 
 
88 
    i2c_init();
89 
 
90 
    sscanf(argv[1],"%x",&OldAddress);
91 
 
92 
    if (argc==2)
93 
    {
94 
        printf("Vzdalenost: %d\n", echo(OldAddress>>1));
95 
        close(file);
96 
        return 0;
97 
    }
98 
 
99 
    sscanf(argv[2],"%x",&NewAddress);
100 
 
101 
    printf("Old: %x New: %x\n", OldAddress, NewAddress);
102 
 
103 
    printf("Vzdalenost: %d\n", echo(OldAddress>>1));
104 
 
105 
    I2C_addr(OldAddress>>1);
106 
    Buf[0]=0x0;
107 
    Buf[1]=0xA0;
108 
    write(file, Buf, 2);
109 
    I2C_addr(OldAddress>>1);
110 
    Buf[0]=0x0;
111 
    Buf[1]=0xAA;
112 
    write(file, Buf, 2);
113 
    I2C_addr(OldAddress>>1);
114 
    Buf[0]=0x0;
115 
    Buf[1]=0xA5;
116 
    write(file, Buf, 2);
117 
    I2C_addr(OldAddress>>1);
118 
    Buf[0]=0x0;
119 
    Buf[1]=NewAddress;
120 
    write(file, Buf, 2);
121 
 
122 
 
123 
    usleep(100000);
124 
 
125 
    printf("Vzdalenost: %d\n", echo(NewAddress>>1));
126 
 
127 
	close(file);
128 
	return 0;
129 
}