Chaitanya Viswa
/
_i2c_master
kjkjkjkjk
Fork of i2c_master by
master.cpp
- Committer:
- viswachaitanya
- Date:
- 2014-06-30
- Revision:
- 0:7811fb22b3de
- Child:
- 1:14b369c0f314
File content as of revision 0:7811fb22b3de:
#include "master.h" float receive_byte() //function to read and print the data received { union join { char byte[4]; //array containing individual bytes float number; //floating point number to be appended }append; float value; append.byte[0]=master.read(1); //reading individual bytes and storing it in array pc.printf("\n(1) %x\n",append.byte[0]); append.byte[1]=master.read(1); pc.printf("(2) %x\n",append.byte[1]); append.byte[2]=master.read(1); pc.printf("(3) %x\n",append.byte[2]); append.byte[3]=master.read(1); pc.printf("(4) %x\n",append.byte[3]); value = append.number; return(value); //returning the 4 byte floating point number } void FUNC_I2C_MASTER_MAIN() { int acknowledge; int loopvariable1=1,loopvariable2=0; while(loopvariable1) { //writing the command to slave master.frequency(100000); //set clock frequency master.start(); //initiating the data transfer master.write(addr|0x00); //addressing the slave to write acknowledge=master.write(get_hk_data); //sending the command to slave if(acknowledge==1) { pc.printf("acknowledge=%d\n",acknowledge); loopvariable1=0; //if acknowledged, breaking loop in next iteration //reading 4 byte data from slave while(loopvariable2<30) { master.frequency(100000); //set clock frequency master.start(); //initiate data transfer acknowledge = master.write(addr | 0x01); //addressing the slave to read if(acknowledge==1) { //pc.printf("enter\n"); if(loopvariable2%3==0) { Sensor.voltage[loopvariable2/3] = receive_byte(); //receiving data if acknowledged pc.printf(" voltage%d = %f\n",loopvariable2/3,Sensor.voltage[loopvariable2/3]); } else if(loopvariable2%3==1) { Sensor.current[loopvariable2/3] = receive_byte(); //receiving data if acknowledged pc.printf(" current%d = %f\n",loopvariable2/3, Sensor.current[loopvariable2/3]); } else if(loopvariable2%3==2) { Sensor.temp[loopvariable2/3] = receive_byte(); //receiving data if acknowledged pc.printf(" temperature%d = %f\n",loopvariable2/3,Sensor.temp[loopvariable2/3]); } loopvariable2++; }//if(acknowledge==1) } //while(loopvariable2<30) master.stop(); }//if(acknowledge==1) }//while(loopvariable1) pc.printf("done"); }//main