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annotate include/I2c.h @ 256:3e93d9793da3 aux_task_args

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Overload BeagleRT_createAuxiliaryTask so tasks can be created with or without arguments
author Liam Donovan <l.b.donovan@qmul.ac.uk>
date Fri, 06 May 2016 21:36:27 +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_ */