green rosh
/
i2c_slave_chaitanya
third commit
Fork of i2c_slave by
slave.cpp@2:8675945f108a, 2014-07-01 (annotated)
- Committer:
- greenroshks
- Date:
- Tue Jul 01 07:28:46 2014 +0000
- Revision:
- 2:8675945f108a
- Parent:
- 1:37d4026fa600
third commit
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
viswachaitanya | 0:ad4485166cfe | 1 | #include "slave.h" |
greenroshks | 1:37d4026fa600 | 2 | |
greenroshks | 1:37d4026fa600 | 3 | SensorData Sensor; |
greenroshks | 1:37d4026fa600 | 4 | I2CSlave slave(p28,p27); //configuring pins p27, p28 as I2Cslave |
greenroshks | 1:37d4026fa600 | 5 | Serial pc (USBTX,USBRX); |
viswachaitanya | 0:ad4485166cfe | 6 | void write_to_master(char send) //function to write data to master |
viswachaitanya | 0:ad4485166cfe | 7 | { |
viswachaitanya | 0:ad4485166cfe | 8 | int acknowledge; |
viswachaitanya | 0:ad4485166cfe | 9 | acknowledge = slave.write(send); //sending the byte to master |
viswachaitanya | 0:ad4485166cfe | 10 | if(acknowledge==1) |
viswachaitanya | 0:ad4485166cfe | 11 | { |
viswachaitanya | 0:ad4485166cfe | 12 | pc.printf(" acknowledge %d sent %x \n",acknowledge,send); |
viswachaitanya | 0:ad4485166cfe | 13 | } |
viswachaitanya | 0:ad4485166cfe | 14 | } |
viswachaitanya | 0:ad4485166cfe | 15 | |
viswachaitanya | 0:ad4485166cfe | 16 | void split(float data) //function to split data into 4 individual bytes and send to master |
viswachaitanya | 0:ad4485166cfe | 17 | { |
viswachaitanya | 0:ad4485166cfe | 18 | union convert |
viswachaitanya | 0:ad4485166cfe | 19 | { |
viswachaitanya | 0:ad4485166cfe | 20 | char byte[4]; //array containing individual bytes |
viswachaitanya | 0:ad4485166cfe | 21 | float number; //floating point number to be split into four bytes |
viswachaitanya | 0:ad4485166cfe | 22 | }v; |
viswachaitanya | 0:ad4485166cfe | 23 | v.number=data; |
viswachaitanya | 0:ad4485166cfe | 24 | write_to_master(v.byte[0]); |
viswachaitanya | 0:ad4485166cfe | 25 | write_to_master(v.byte[1]); |
viswachaitanya | 0:ad4485166cfe | 26 | write_to_master(v.byte[2]); |
viswachaitanya | 0:ad4485166cfe | 27 | write_to_master(v.byte[3]); |
viswachaitanya | 0:ad4485166cfe | 28 | pc.printf("sent %f\n",v.number); |
viswachaitanya | 0:ad4485166cfe | 29 | } |
viswachaitanya | 0:ad4485166cfe | 30 | |
viswachaitanya | 0:ad4485166cfe | 31 | |
viswachaitanya | 0:ad4485166cfe | 32 | |
viswachaitanya | 0:ad4485166cfe | 33 | void FUNC_I2C_SLAVE_MAIN() |
viswachaitanya | 0:ad4485166cfe | 34 | { |
viswachaitanya | 0:ad4485166cfe | 35 | wait(0.5); |
viswachaitanya | 0:ad4485166cfe | 36 | slave.address(0x20); //assigning slave address |
viswachaitanya | 0:ad4485166cfe | 37 | int Switch_Variable; |
viswachaitanya | 0:ad4485166cfe | 38 | int ReadAddressed=1; |
viswachaitanya | 0:ad4485166cfe | 39 | int WriteGeneral=3; |
viswachaitanya | 0:ad4485166cfe | 40 | int loopvariable1=1; |
viswachaitanya | 0:ad4485166cfe | 41 | int loopvariable2=0; |
viswachaitanya | 0:ad4485166cfe | 42 | //initialising dummy sensor data |
viswachaitanya | 0:ad4485166cfe | 43 | Sensor.voltage[0]=0.1;Sensor.current[0]=0.0;Sensor.temp[0]=1.0; |
viswachaitanya | 0:ad4485166cfe | 44 | Sensor.voltage[1]=0.1;Sensor.current[1]=1.1;Sensor.temp[1]=2.0; |
viswachaitanya | 0:ad4485166cfe | 45 | Sensor.voltage[2]=0.2;Sensor.current[2]=2.2;Sensor.temp[2]=2.0; |
viswachaitanya | 0:ad4485166cfe | 46 | Sensor.voltage[3]=0.3;Sensor.current[3]=3.3;Sensor.temp[3]=3.0; |
viswachaitanya | 0:ad4485166cfe | 47 | Sensor.voltage[4]=0.4;Sensor.current[4]=4.4;Sensor.temp[4]=4.0; |
viswachaitanya | 0:ad4485166cfe | 48 | Sensor.voltage[5]=0.5;Sensor.current[5]=5.5;Sensor.temp[5]=5.0; |
viswachaitanya | 0:ad4485166cfe | 49 | Sensor.voltage[6]=0.6;Sensor.current[6]=6.6;Sensor.temp[6]=6.0; |
viswachaitanya | 0:ad4485166cfe | 50 | Sensor.voltage[7]=0.7;Sensor.current[7]=7.7;Sensor.temp[7]=7.0; |
viswachaitanya | 0:ad4485166cfe | 51 | Sensor.voltage[8]=0.8;Sensor.current[8]=8.8;Sensor.temp[8]=8.0; |
viswachaitanya | 0:ad4485166cfe | 52 | Sensor.voltage[9]=0.9;Sensor.current[9]=9.9;Sensor.temp[9]=20.5; |
viswachaitanya | 0:ad4485166cfe | 53 | while(loopvariable1) |
viswachaitanya | 0:ad4485166cfe | 54 | { |
viswachaitanya | 0:ad4485166cfe | 55 | //to read data from master |
viswachaitanya | 0:ad4485166cfe | 56 | if(slave.receive()==WriteGeneral) //checking if slave is addressed to write |
viswachaitanya | 0:ad4485166cfe | 57 | { |
viswachaitanya | 0:ad4485166cfe | 58 | Switch_Variable=slave.read(); //receiving data |
viswachaitanya | 0:ad4485166cfe | 59 | pc.printf("switch variable=%d\n",Switch_Variable); |
viswachaitanya | 0:ad4485166cfe | 60 | slave.stop(); //reset slave to default receiving state |
viswachaitanya | 0:ad4485166cfe | 61 | loopvariable1=0; |
viswachaitanya | 0:ad4485166cfe | 62 | //to interpret and write data to master |
viswachaitanya | 0:ad4485166cfe | 63 | switch(Switch_Variable) |
viswachaitanya | 0:ad4485166cfe | 64 | { |
viswachaitanya | 0:ad4485166cfe | 65 | |
viswachaitanya | 0:ad4485166cfe | 66 | case 1: while(loopvariable2<30) |
viswachaitanya | 0:ad4485166cfe | 67 | { |
viswachaitanya | 0:ad4485166cfe | 68 | if(slave.receive()==ReadAddressed) //check if slave is addressed to read |
viswachaitanya | 0:ad4485166cfe | 69 | { |
viswachaitanya | 0:ad4485166cfe | 70 | if(loopvariable2%3==0) |
viswachaitanya | 0:ad4485166cfe | 71 | { |
viswachaitanya | 0:ad4485166cfe | 72 | pc.printf("\nvoltage%d\n",loopvariable2/3); |
viswachaitanya | 0:ad4485166cfe | 73 | split(Sensor.voltage[loopvariable2/3]); |
viswachaitanya | 0:ad4485166cfe | 74 | } |
viswachaitanya | 0:ad4485166cfe | 75 | else if(loopvariable2%3==1) |
viswachaitanya | 0:ad4485166cfe | 76 | { |
viswachaitanya | 0:ad4485166cfe | 77 | pc.printf("\ncurrent%d\n",loopvariable2/3); |
viswachaitanya | 0:ad4485166cfe | 78 | split(Sensor.current[loopvariable2/3]); |
viswachaitanya | 0:ad4485166cfe | 79 | } |
viswachaitanya | 0:ad4485166cfe | 80 | else if(loopvariable2%3==2) |
viswachaitanya | 0:ad4485166cfe | 81 | { |
viswachaitanya | 0:ad4485166cfe | 82 | pc.printf("\ntemp%d\n",loopvariable2/3); |
viswachaitanya | 0:ad4485166cfe | 83 | split(Sensor.temp[loopvariable2/3]); |
viswachaitanya | 0:ad4485166cfe | 84 | } |
viswachaitanya | 0:ad4485166cfe | 85 | loopvariable2++; |
viswachaitanya | 0:ad4485166cfe | 86 | slave.stop(); |
viswachaitanya | 0:ad4485166cfe | 87 | } |
viswachaitanya | 0:ad4485166cfe | 88 | } |
viswachaitanya | 0:ad4485166cfe | 89 | break; |
viswachaitanya | 0:ad4485166cfe | 90 | case 2 : pc.printf(" telecommand 2\n"); |
viswachaitanya | 0:ad4485166cfe | 91 | break; |
viswachaitanya | 0:ad4485166cfe | 92 | |
viswachaitanya | 0:ad4485166cfe | 93 | }//switch case ends |
viswachaitanya | 0:ad4485166cfe | 94 | } |
viswachaitanya | 0:ad4485166cfe | 95 | } |
viswachaitanya | 0:ad4485166cfe | 96 | pc.printf("done"); |
viswachaitanya | 0:ad4485166cfe | 97 | } |