green rosh / Mbed 2 deprecated freemaster_write2master_working

i2c master with interrupt

Dependencies:   mbed

Fork of freemaster2_1 by Seeker of Truth ,

main.cpp@2:2dd5bd9a64fb, 2014-12-10 (annotated)

Committer:
greenroshks
Date:
Wed Dec 10 16:39:17 2014 +0000
Revision:
2:2dd5bd9a64fb
Parent:
1:8e4b5e1f8039 
i2c master with interrupt

Who changed what in which revision?

UserRevisionLine numberNew contents of line
viswachaitanya 0:9ea68477caaf 1 #include "mbed.h"
viswachaitanya 0:9ea68477caaf 2
viswachaitanya 0:9ea68477caaf 3 const int addr = 0x20; //slave address
viswachaitanya 0:9ea68477caaf 4 I2C master (D14,D15); //configure pins p27,p28 as I2C master
viswachaitanya 0:9ea68477caaf 5 Serial pc (USBTX,USBRX);
greenroshks 2:2dd5bd9a64fb 6 DigitalOut interrupt(D9);
greenroshks 2:2dd5bd9a64fb 7 InterruptIn data_ready(D10);
greenroshks 2:2dd5bd9a64fb 8 void FUNC_I2C_MASTER()
viswachaitanya 0:9ea68477caaf 9 {
greenroshks 2:2dd5bd9a64fb 10 //printf("press backspace for master to start \n\r");
greenroshks 2:2dd5bd9a64fb 11 //while(1){
greenroshks 2:2dd5bd9a64fb 12 // interrupt = 0;
greenroshks 2:2dd5bd9a64fb 13 // if(pc.getc()=='z'){
greenroshks 2:2dd5bd9a64fb 14 interrupt = 1;
greenroshks 2:2dd5bd9a64fb 15 printf("\nEntered master function\n");
greenroshks 2:2dd5bd9a64fb 16 int ack0 =true;
viswachaitanya 0:9ea68477caaf 17 char *data = new char;
viswachaitanya 0:9ea68477caaf 18 *data = 'b';
viswachaitanya 0:9ea68477caaf 19 bool loopvariable0 = true;
raizel_varun 1:8e4b5e1f8039 20 master.frequency(100000); //set clock frequency
raizel_varun 1:8e4b5e1f8039 21 //master.start();
greenroshks 2:2dd5bd9a64fb 22 while(ack0)
greenroshks 2:2dd5bd9a64fb 23 {
raizel_varun 1:8e4b5e1f8039 24 //printf("2 master clk freq setup and addressing slave\n\r");
greenroshks 2:2dd5bd9a64fb 25
viswachaitanya 0:9ea68477caaf 26 master.start(); //initiating the data transfer
greenroshks 2:2dd5bd9a64fb 27 ack0 = master.read(addr,data,1);
greenroshks 2:2dd5bd9a64fb 28 }
greenroshks 2:2dd5bd9a64fb 29 if(!ack0)
greenroshks 2:2dd5bd9a64fb 30 {
greenroshks 2:2dd5bd9a64fb 31 printf("\n master has read %c from slave\n\r",*data);
viswachaitanya 0:9ea68477caaf 32 loopvariable0=false;
viswachaitanya 0:9ea68477caaf 33 }
greenroshks 2:2dd5bd9a64fb 34 //master.stop();
greenroshks 2:2dd5bd9a64fb 35
greenroshks 2:2dd5bd9a64fb 36 //printf("done\n\r");
greenroshks 2:2dd5bd9a64fb 37 delete data;
greenroshks 2:2dd5bd9a64fb 38 interrupt=0;
greenroshks 2:2dd5bd9a64fb 39 }
greenroshks 2:2dd5bd9a64fb 40 void main()
greenroshks 2:2dd5bd9a64fb 41 {
greenroshks 2:2dd5bd9a64fb 42 data_ready.rise(&FUNC_I2C_MASTER);
greenroshks 2:2dd5bd9a64fb 43 printf("\nstarted master\n");
greenroshks 2:2dd5bd9a64fb 44 while(1)
greenroshks 2:2dd5bd9a64fb 45 {
greenroshks 2:2dd5bd9a64fb 46 ;
viswachaitanya 0:9ea68477caaf 47 }
greenroshks 2:2dd5bd9a64fb 48 }