annotate include/I2c.h @ 373:3bed6b09223c
prerelease
Updated NE10 library to the latest version; needs a corresponding update to the /usr/include/ne10 header files on the SD image. Updated examples to compile against new version, and reordered D-Box channels to account for new PRU-based DAC channel reordering.
| author |
andrewm |
| date |
Thu, 09 Jun 2016 20:03:09 +0100 |
| parents |
8a575ba3ab52 |
| children |
|
| rev |
line source |
|
andrewm@0
|
1 /*
|
|
andrewm@0
|
2 * I2c.h
|
|
andrewm@0
|
3 *
|
|
andrewm@0
|
4 * Created on: Oct 14, 2013
|
|
andrewm@0
|
5 * Author: Victor Zappi
|
|
andrewm@0
|
6 */
|
|
andrewm@0
|
7
|
|
andrewm@0
|
8 #ifndef I2C_H_
|
|
andrewm@0
|
9 #define I2C_H_
|
|
andrewm@0
|
10
|
|
andrewm@0
|
11 #include <iostream>
|
|
andrewm@0
|
12 #include <iomanip>
|
|
andrewm@0
|
13 #include <string>
|
|
andrewm@0
|
14 #include <stdio.h>
|
|
andrewm@0
|
15 #include <stdlib.h>
|
|
andrewm@0
|
16 #include <unistd.h>
|
|
andrewm@0
|
17 #include <fcntl.h>
|
|
andrewm@0
|
18 #include <linux/i2c.h>
|
|
andrewm@0
|
19 #include <linux/i2c-dev.h>
|
|
andrewm@0
|
20 #include <sys/ioctl.h>
|
|
andrewm@0
|
21 #include <stropts.h>
|
|
andrewm@0
|
22
|
|
andrewm@0
|
23 #define MAX_BUF_NAME 64
|
|
andrewm@0
|
24
|
|
andrewm@0
|
25 using namespace std;
|
|
andrewm@0
|
26
|
|
andrewm@0
|
27
|
|
andrewm@0
|
28 class I2c
|
|
andrewm@0
|
29 {
|
|
andrewm@0
|
30
|
|
andrewm@0
|
31 protected:
|
|
andrewm@0
|
32 int i2C_bus;
|
|
andrewm@0
|
33 int i2C_address;
|
|
andrewm@0
|
34 int i2C_file;
|
|
andrewm@0
|
35
|
|
andrewm@0
|
36 public:
|
|
andrewm@0
|
37 int initI2C_RW(int bus, int address, int file);
|
|
andrewm@0
|
38 virtual int readI2C() = 0;
|
|
andrewm@0
|
39 int closeI2C();
|
|
andrewm@0
|
40
|
|
andrewm@0
|
41 virtual ~I2c();
|
|
andrewm@0
|
42
|
|
andrewm@0
|
43 };
|
|
andrewm@0
|
44
|
|
andrewm@0
|
45
|
|
andrewm@0
|
46 inline int I2c::initI2C_RW(int bus, int address, int fileHnd)
|
|
andrewm@0
|
47 {
|
|
andrewm@0
|
48 i2C_bus = bus;
|
|
andrewm@0
|
49 i2C_address = address;
|
|
andrewm@0
|
50 i2C_file = fileHnd;
|
|
andrewm@0
|
51
|
|
andrewm@0
|
52 // open I2C device as a file
|
|
andrewm@0
|
53 char namebuf[MAX_BUF_NAME];
|
|
andrewm@0
|
54 snprintf(namebuf, sizeof(namebuf), "/dev/i2c-%d", i2C_bus);
|
|
andrewm@0
|
55
|
|
andrewm@0
|
56 if ((i2C_file = open(namebuf, O_RDWR)) < 0)
|
|
andrewm@0
|
57 {
|
|
andrewm@0
|
58 cout << "Failed to open " << namebuf << " I2C Bus" << endl;
|
|
andrewm@0
|
59 return(1);
|
|
andrewm@0
|
60 }
|
|
andrewm@0
|
61
|
|
andrewm@0
|
62 // target device as slave
|
|
andrewm@0
|
63 if (ioctl(i2C_file, I2C_SLAVE, i2C_address) < 0){
|
|
andrewm@0
|
64 cout << "I2C_SLAVE address " << i2C_address << " failed..." << endl;
|
|
andrewm@0
|
65 return(2);
|
|
andrewm@0
|
66 }
|
|
andrewm@0
|
67
|
|
andrewm@0
|
68 return 0;
|
|
andrewm@0
|
69 }
|
|
andrewm@0
|
70
|
|
andrewm@0
|
71
|
|
andrewm@0
|
72
|
|
andrewm@0
|
73 inline int I2c::closeI2C()
|
|
andrewm@0
|
74 {
|
|
andrewm@0
|
75 if(close(i2C_file)>0)
|
|
andrewm@0
|
76 {
|
|
andrewm@0
|
77 cout << "Failed to close file "<< i2C_file << endl;
|
|
andrewm@0
|
78 return 1;
|
|
andrewm@0
|
79 }
|
|
andrewm@0
|
80 return 0;
|
|
andrewm@0
|
81 }
|
|
andrewm@0
|
82
|
|
andrewm@0
|
83
|
|
andrewm@0
|
84 inline I2c::~I2c(){}
|
|
andrewm@0
|
85
|
|
andrewm@0
|
86
|
|
andrewm@0
|
87 #endif /* I2C_H_ */
|
