1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/*
* Copyright (C) Koen Kooi <<koen@beagleboard.org>
*
* The pico DLP Controller Driver is free software; you
* can redistribute it and/or modify it under the terms of the GNU
* General Public License version 3 as published by the Free Software
* Foundation.
*
* The pico DLP Controller Driver is distributed in
* the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
* License for more details.
*
* You should have received a copy of the GNU General Public License
* along with The pico DLP Controller Driver ; if not,
* write to the Free Software Foundation, Inc., 59 Temple Place,
* Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include "i2c-dev.h"
#define ADDRESS 0x1a
int main(int argc, char **argv)
{
int fd = 0;
/* Attempt to open I2C device (/dev/i2c-3) */
fd = open("/dev/i2c-3", O_RDWR);
if (fd == -1) {
fprintf(stderr, "Failed to open pico DLP I2C device: %m\n");
exit(0);
}
/* Set the slave address of type I2C_SLAVE */
if (ioctl(fd, I2C_SLAVE, ADDRESS) < 0) {
fprintf(stderr, "Failed to access pico DLp: %m\n");
exit(0);
}
/* Attempt to enable checksumming */
if (ioctl(fd, I2C_PEC, 1) < 0) {
fprintf(stderr, "Failed to enable PEC\n");
exit(0);
}
uint16_t hflip; /* The horizontal flip bit */
uint16_t vflip; /* The vertical flip bit */
/* Read the status bits for horizontal and vertical vlip */
fprintf(stdout, "Getting flip bits \n");
hflip = i2c_smbus_read_word_data(fd, 0x08);
vflip = i2c_smbus_read_word_data(fd, 0x09);
/* set flip bits to 0 */
fprintf(stdout, "Setting flip bits to zero\n");
i2c_smbus_write_word_data(fd, 0x08, 0);
i2c_smbus_write_word_data(fd, 0x09, 0);
sleep(2);
/* set flip bits to 1 */
fprintf(stdout, "Getting flip bits to one\n");
i2c_smbus_write_word_data(fd, 0x08, 1);
i2c_smbus_write_word_data(fd, 0x09, 1);
sleep(2);
/* restore values */
fprintf(stdout, "Restoring flip bits \n");
i2c_smbus_write_word_data(fd, 0x08, hflip);
i2c_smbus_write_word_data(fd, 0x09, vflip);
/* Output the values to stdout */
fprintf(stdout, "hflip: %d - vflip: %d\n", hflip, vflip);
return 0;
}
|
