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annotate include/I2c.h @ 12:a6beeba3a648

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Initial support for higher matrix sample rates by reducing the number of channels. Input not tested yet, and not all examples updated to new format.
author andrewm
date Thu, 22 Jan 2015 19:00:22 +0000
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_ */