green rosh / Mbed 2 deprecated RTOS_BAE_IITMSAT

Dependencies:   mbed-rtos mbed

slave.cpp@3:307c56629df0, 2014-07-09 (annotated)

Committer:
greenroshks
Date:
Wed Jul 09 09:03:11 2014 +0000
Revision:
3:307c56629df0
Parent:
2:1792c9cda669 
updated with pranoy's hk

Who changed what in which revision?

UserRevisionLine numberNew contents of line
greenroshks 2:1792c9cda669 1 #include "slave.h"
greenroshks 2:1792c9cda669 2 #include "HK.h"
greenroshks 2:1792c9cda669 3
greenroshks 2:1792c9cda669 4 extern SensorData Sensor;
greenroshks 2:1792c9cda669 5 I2CSlave slave(p28,p27); //configuring pins p27, p28 as I2Cslave
greenroshks 2:1792c9cda669 6 Serial screen (USBTX,USBRX);
greenroshks 2:1792c9cda669 7 void write_to_master(char send) //function to write data to master
greenroshks 2:1792c9cda669 8 {
greenroshks 2:1792c9cda669 9 int acknowledge;
greenroshks 2:1792c9cda669 10 acknowledge = slave.write(send); //sending the byte to master
greenroshks 2:1792c9cda669 11 if(acknowledge==1)
greenroshks 2:1792c9cda669 12 {
greenroshks 2:1792c9cda669 13 screen.printf(" acknowledge %d sent %x \n",acknowledge,send);
greenroshks 2:1792c9cda669 14 }
greenroshks 2:1792c9cda669 15 }
greenroshks 2:1792c9cda669 16
greenroshks 2:1792c9cda669 17 void split(float data) //function to split data into 4 individual bytes and send to master
greenroshks 2:1792c9cda669 18 {
greenroshks 2:1792c9cda669 19 union convert
greenroshks 2:1792c9cda669 20 {
greenroshks 2:1792c9cda669 21 char byte[4]; //array containing individual bytes
greenroshks 2:1792c9cda669 22 float number; //floating point number to be split into four bytes
greenroshks 2:1792c9cda669 23 }v;
greenroshks 2:1792c9cda669 24 v.number=data;
greenroshks 2:1792c9cda669 25 write_to_master(v.byte[0]);
greenroshks 2:1792c9cda669 26 write_to_master(v.byte[1]);
greenroshks 2:1792c9cda669 27 write_to_master(v.byte[2]);
greenroshks 2:1792c9cda669 28 write_to_master(v.byte[3]);
greenroshks 2:1792c9cda669 29 screen.printf("sent %f\n",v.number);
greenroshks 2:1792c9cda669 30 }
greenroshks 2:1792c9cda669 31
greenroshks 2:1792c9cda669 32
greenroshks 2:1792c9cda669 33
greenroshks 2:1792c9cda669 34 void FUNC_I2C_SLAVE_MAIN()
greenroshks 2:1792c9cda669 35 {
greenroshks 2:1792c9cda669 36 wait(0.5);
greenroshks 2:1792c9cda669 37 screen.printf("\nSlave entered\n");
greenroshks 2:1792c9cda669 38 slave.address(0x20); //assigning slave address
greenroshks 2:1792c9cda669 39 int Switch_Variable;
greenroshks 2:1792c9cda669 40 int ReadAddressed=1;
greenroshks 2:1792c9cda669 41 int WriteGeneral=3;
greenroshks 2:1792c9cda669 42 int loopvariable1=1;
greenroshks 2:1792c9cda669 43 int loopvariable2=0;
greenroshks 2:1792c9cda669 44 //initialising dummy sensor data
greenroshks 2:1792c9cda669 45
greenroshks 2:1792c9cda669 46 while(loopvariable1)
greenroshks 2:1792c9cda669 47 {
greenroshks 2:1792c9cda669 48 //to read data from master
greenroshks 2:1792c9cda669 49 if(slave.receive()==WriteGeneral) //checking if slave is addressed to write
greenroshks 2:1792c9cda669 50 {
greenroshks 2:1792c9cda669 51 Switch_Variable=slave.read(); //receiving data
greenroshks 2:1792c9cda669 52 screen.printf("switch variable=%d\n",Switch_Variable);
greenroshks 2:1792c9cda669 53 slave.stop(); //reset slave to default receiving state
greenroshks 2:1792c9cda669 54 loopvariable1=0;
greenroshks 2:1792c9cda669 55 //to interpret and write data to master
greenroshks 2:1792c9cda669 56 switch(Switch_Variable)
greenroshks 2:1792c9cda669 57 {
greenroshks 2:1792c9cda669 58
greenroshks 2:1792c9cda669 59 case 1: while(loopvariable2<30)
greenroshks 2:1792c9cda669 60 {
greenroshks 2:1792c9cda669 61 if(slave.receive()==ReadAddressed) //check if slave is addressed to read
greenroshks 2:1792c9cda669 62 {
greenroshks 2:1792c9cda669 63 if(loopvariable2%3==0)
greenroshks 2:1792c9cda669 64 {
greenroshks 2:1792c9cda669 65 screen.printf("\nvoltage%d\n",loopvariable2/3);
greenroshks 2:1792c9cda669 66 split(Sensor.Voltage[loopvariable2/3]);
greenroshks 2:1792c9cda669 67 }
greenroshks 2:1792c9cda669 68 else if(loopvariable2%3==1)
greenroshks 2:1792c9cda669 69 {
greenroshks 2:1792c9cda669 70 screen.printf("\ncurrent%d\n",loopvariable2/3);
greenroshks 2:1792c9cda669 71 split(Sensor.Current[loopvariable2/3]);
greenroshks 2:1792c9cda669 72 }
greenroshks 2:1792c9cda669 73 else if(loopvariable2%3==2)
greenroshks 2:1792c9cda669 74 {
greenroshks 2:1792c9cda669 75 screen.printf("\ntemp%d\n",loopvariable2/3);
greenroshks 3:307c56629df0 76 split(Sensor.Temperature[loopvariable2/3]);
greenroshks 2:1792c9cda669 77 }
greenroshks 2:1792c9cda669 78 loopvariable2++;
greenroshks 2:1792c9cda669 79 slave.stop();
greenroshks 2:1792c9cda669 80 }
greenroshks 2:1792c9cda669 81 }
greenroshks 2:1792c9cda669 82 break;
greenroshks 2:1792c9cda669 83 case 2 : screen.printf(" telecommand 2\n");
greenroshks 2:1792c9cda669 84 break;
greenroshks 2:1792c9cda669 85
greenroshks 2:1792c9cda669 86 }//switch case ends
greenroshks 2:1792c9cda669 87 }
greenroshks 2:1792c9cda669 88 }
greenroshks 2:1792c9cda669 89 screen.printf("done");
greenroshks 2:1792c9cda669 90 }