Chaitanya Viswa
i2c slave program
Revision 0:ad4485166cfe, committed 2014-06-30
- Comitter:
- viswachaitanya
- Date:
- Mon Jun 30 11:59:30 2014 +0000
- Commit message:
- i2c slave version 1
Changed in this revision
diff -r 000000000000 -r ad4485166cfe mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Mon Jun 30 11:59:30 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/024bf7f99721 \ No newline at end of file
diff -r 000000000000 -r ad4485166cfe slave.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/slave.cpp Mon Jun 30 11:59:30 2014 +0000
@@ -0,0 +1,93 @@
+#include "slave.h"
+void write_to_master(char send) //function to write data to master
+ {
+ int acknowledge;
+ acknowledge = slave.write(send); //sending the byte to master
+ if(acknowledge==1)
+ {
+ pc.printf(" acknowledge %d sent %x \n",acknowledge,send);
+ }
+ }
+
+ void split(float data) //function to split data into 4 individual bytes and send to master
+ {
+ union convert
+ {
+ char byte[4]; //array containing individual bytes
+ float number; //floating point number to be split into four bytes
+ }v;
+ v.number=data;
+ write_to_master(v.byte[0]);
+ write_to_master(v.byte[1]);
+ write_to_master(v.byte[2]);
+ write_to_master(v.byte[3]);
+ pc.printf("sent %f\n",v.number);
+ }
+
+
+
+void FUNC_I2C_SLAVE_MAIN()
+{
+ wait(0.5);
+ slave.address(0x20); //assigning slave address
+ int Switch_Variable;
+ int ReadAddressed=1;
+ int WriteGeneral=3;
+ int loopvariable1=1;
+ int loopvariable2=0;
+//initialising dummy sensor data
+ Sensor.voltage[0]=0.1;Sensor.current[0]=0.0;Sensor.temp[0]=1.0;
+ Sensor.voltage[1]=0.1;Sensor.current[1]=1.1;Sensor.temp[1]=2.0;
+ Sensor.voltage[2]=0.2;Sensor.current[2]=2.2;Sensor.temp[2]=2.0;
+ Sensor.voltage[3]=0.3;Sensor.current[3]=3.3;Sensor.temp[3]=3.0;
+ Sensor.voltage[4]=0.4;Sensor.current[4]=4.4;Sensor.temp[4]=4.0;
+ Sensor.voltage[5]=0.5;Sensor.current[5]=5.5;Sensor.temp[5]=5.0;
+ Sensor.voltage[6]=0.6;Sensor.current[6]=6.6;Sensor.temp[6]=6.0;
+ Sensor.voltage[7]=0.7;Sensor.current[7]=7.7;Sensor.temp[7]=7.0;
+ Sensor.voltage[8]=0.8;Sensor.current[8]=8.8;Sensor.temp[8]=8.0;
+ Sensor.voltage[9]=0.9;Sensor.current[9]=9.9;Sensor.temp[9]=20.5;
+ while(loopvariable1)
+ {
+//to read data from master
+ if(slave.receive()==WriteGeneral) //checking if slave is addressed to write
+ {
+ Switch_Variable=slave.read(); //receiving data
+ pc.printf("switch variable=%d\n",Switch_Variable);
+ slave.stop(); //reset slave to default receiving state
+ loopvariable1=0;
+//to interpret and write data to master
+ switch(Switch_Variable)
+ {
+
+ case 1: while(loopvariable2<30)
+ {
+ if(slave.receive()==ReadAddressed) //check if slave is addressed to read
+ {
+ if(loopvariable2%3==0)
+ {
+ pc.printf("\nvoltage%d\n",loopvariable2/3);
+ split(Sensor.voltage[loopvariable2/3]);
+ }
+ else if(loopvariable2%3==1)
+ {
+ pc.printf("\ncurrent%d\n",loopvariable2/3);
+ split(Sensor.current[loopvariable2/3]);
+ }
+ else if(loopvariable2%3==2)
+ {
+ pc.printf("\ntemp%d\n",loopvariable2/3);
+ split(Sensor.temp[loopvariable2/3]);
+ }
+ loopvariable2++;
+ slave.stop();
+ }
+ }
+ break;
+ case 2 : pc.printf(" telecommand 2\n");
+ break;
+
+ }//switch case ends
+ }
+}
+ pc.printf("done");
+}
diff -r 000000000000 -r ad4485166cfe slave.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/slave.h Mon Jun 30 11:59:30 2014 +0000
@@ -0,0 +1,14 @@
+#include "mbed.h"
+I2CSlave slave(p28,p27); //configuring pins p27, p28 as I2Cslave
+Serial pc (USBTX,USBRX);
+void split(float); //function to split 4 bcurrentte data
+void write_to_master(char); //function to write data to master
+void FUNC_I2C_SLAVE_MAIN()
+
+struct SensorData //HK_data_structure
+{
+ float voltage[10];
+ float current[10];
+ float temp[10];
+ //float Battery[2];
+} Sensor;