Revision 7:6b1a6941ac87, committed 2014-09-18

Comitter:

viswa_chaitanya

Date:

Thu Sep 18 10:32:43 2014 +0000

Parent:

6:209f4db62daf

Commit message:

working code of cdms with i2c

Changed in this revision

diff -r 209f4db62daf -r 6b1a6941ac87 main.cpp
--- a/main.cpp	Tue Jun 04 16:01:32 2013 +0100
+++ b/main.cpp	Thu Sep 18 10:32:43 2014 +0000
@@ -1,21 +1,103 @@
 #include "mbed.h"
 #include "rtos.h"
+#include "master.h"
+
+//#include "tmtc.h"
+//#include "science.h"
+//#include "hk.h"
  
-DigitalOut led1(LED1);
-DigitalOut led2(LED2);
+#define intmax 11999
+
+Thread* t_tmtc;
+Thread* t_science_store_sd;
+Thread* t_hk_store_sd;
+
+void t_tmtc_main(void const *args);
+void t_science_main(void const *args);
+void t_hk_main(void const *args);
+void scheduler(void const * args);
+
+Timer timer_main;
+int schedcount = 1;
+Mutex critical;
  
-void led2_thread(void const *args) {
+int main() {
+    Thread thread_tmtc(t_tmtc_main, NULL, osPriorityIdle);
+    t_tmtc = &thread_tmtc;
+    Thread thread_science(t_science_main, NULL, osPriorityLow);
+    t_science_store_sd = &thread_science;
+    Thread thread_hk(t_hk_main, NULL, osPriorityBelowNormal);
+    t_hk_store_sd = &thread_hk;
+        
+    RtosTimer schedule(scheduler,osTimerPeriodic);
+    timer_main.start();
+    schedule.start(5000);
+    Thread::wait(osWaitForever);
+}
+
+void scheduler(void const * args)
+{
+    if(schedcount == intmax+1)                              //the value is reset at this value so as to ensure smooth flow, 65532 and 0 are divisible by 3 and 2.
+    {
+        schedcount =0;
+    }
+         
+    if(schedcount%4==0)
+    {
+        printf("\nHK signal at %f\n",timer_main.read());
+        t_hk_store_sd->signal_set(0x01);
+    }
+    
+    if(schedcount%3==0)
+    {
+        printf("\nScience signal at %f\n",timer_main.read());
+        t_science_store_sd->signal_set(0x01);
+    }
+    
+    if(schedcount==5)
+    {
+        printf("\nTMTC signalled");
+        t_tmtc->signal_set(0x1);
+    }
+    
+    schedcount++;
+}
+
+void t_science_main(void const *args) {
     while (true) {
-        led2 = !led2;
-        Thread::wait(1000);
+        Thread::signal_wait(0x1);       
+        critical.lock();
+        printf("science data aquisition started\n");
+        wait(3);
+        printf("science data acquisition ended\n");
+        t_hk_store_sd->signal_set(0x10);
+        critical.unlock();
+        wait(3);
+        printf("Science data written to SD card\n");
     }
 }
- 
-int main() {
-    Thread thread(led2_thread);
-    
+
+void t_hk_main(void const *args) {
     while (true) {
-        led1 = !led1;
-        Thread::wait(500);
+        Thread::signal_wait(0x1);
+        critical.lock();
+        printf("HK acquisition started\n");
+        FUNC_I2C_MASTER_MAIN('1',0x20,24 );
+        wait(2);
+        printf("HK acquisition ended\n");
+        critical.unlock();
+        wait(2);
+        printf("HK data written to SD card");
     }
 }
+
+void t_tmtc_main(void const *args) {
+    Thread::signal_wait(0x1);
+    critical.lock();
+    printf("tmtc started\n");
+    wait(5);
+    printf("tmtc ended\n");
+    critical.unlock();
+    wait(5);
+    printf("tmtc executed\n");
+}
\ No newline at end of file

diff -r 209f4db62daf -r 6b1a6941ac87 master.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/master.cpp	Thu Sep 18 10:32:43 2014 +0000
@@ -0,0 +1,81 @@
+#include "master.h"
+
+I2C master (p28,p27);                      //configure pins p27,p28 as I2C master
+Serial pc (USBTX,USBRX);
+
+struct SensorData                          //HK_data_structure
+{
+    char voltage[10];
+    char current[10];
+    char temp[10];
+} Sensor;
+
+void FUNC_I2C_MASTER_MAIN(char command, int slave_address, int iterations)
+{
+    wait(0.5);
+    printf("1\n");
+    bool acknowledge1;
+    bool acknowledge2;
+    uint8_t loopvariable2=0;
+    bool loopvariable1 = true;
+    bool loopvariable3 = true;
+    while(loopvariable1)
+    {
+//-------------writing the command to slave--------------------------------------------------------------        
+        printf("2\n");
+        master.frequency(100000);                       //set clock frequency
+        master.start();                                 //initiating the data transfer
+        acknowledge2 = (bool) master.write(slave_address|0x00);           //addressing the slave to write
+        if(acknowledge2)                             //proceeding further only if slave is addressed
+        {
+            printf("3\n");
+        acknowledge1 = (bool) master.write(command);         //sending the command to slave 
+        if(acknowledge1)                             //proceeding further only if sent data is acknowledged   
+           {
+               printf("acknowledge1=%d\n",acknowledge1);
+               loopvariable1=false;                         //if acknowledged, breaking loop in next iteration
+               
+//--------------reading data from slave---------------------------------------------------------------          
+               while(loopvariable3)
+                 {              
+                    master.frequency(100000);                    //set clock frequency 
+                    master.start();                              //initiate data transfer 
+                    acknowledge1 = (bool) master.write(slave_address | 0x01);    //addressing the slave to read
+                    
+                    if(acknowledge1)                          //proceedong only if slae is addressed
+                       {  
+                       loopvariable3 = false;
+                       while(loopvariable2<8)
+                          { 
+                              Sensor.voltage[loopvariable2] =  receive_byte();              //receiving data if acknowledged
+                              printf(" voltage%d = %x\n",loopvariable2,Sensor.voltage[loopvariable2]);
+                             
+                              Sensor.current[loopvariable2] =  receive_byte();             //receiving data if acknowledged
+                              printf(" current%d = %x\n",loopvariable2, Sensor.current[loopvariable2]);
+                            
+                              Sensor.temp[loopvariable2] =  receive_byte();                //receiving data if acknowledged
+                              printf(" temperature%d = %x\n",loopvariable2,Sensor.temp[loopvariable2]);
+                            
+                              loopvariable2++;
+                          
+                          } //while(loopvariable2<30) 
+                       }//if(acknowledge1==1)
+                 
+                    master.stop();
+                 }//while(loopvariable3) 
+            }//if(acknowledge1==1)   
+        }//if(acknowledge2==1) 
+     }//while(loopvariable1)
+   printf("done");
+}//main
+
+
+//----------------function to read and return the data received-----------------------------------
+char receive_byte()                                    
+{
+   
+    char value;
+    value = master.read(1);                     
+    return(value);                              //returning the 4 byte floating point number  
+}
+

diff -r 209f4db62daf -r 6b1a6941ac87 master.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/master.h	Thu Sep 18 10:32:43 2014 +0000
@@ -0,0 +1,10 @@
+#include "mbed.h"                          //library                                              
+#define get_hk_data '1'                      //sample telecommands
+#define telecommand2 '2'
+#define telecommand3 '3'
+#define telecommand4 '4'
+#define telecommand5 '5'
+
+const int addr = 0x20;                     //slave address 
+char receive_byte();                      //funtion to receive float data 
+void FUNC_I2C_MASTER_MAIN(char command, int slave_address, int iterations);
\ No newline at end of file

diff -r 209f4db62daf -r 6b1a6941ac87 mbed-rtos.lib
--- a/mbed-rtos.lib	Tue Jun 04 16:01:32 2013 +0100
+++ b/mbed-rtos.lib	Thu Sep 18 10:32:43 2014 +0000
@@ -1,1 +1,1 @@
-https://mbed.org/users/mbed_official/code/mbed-rtos/
\ No newline at end of file
+https://mbed.org/users/mbed_official/code/mbed-rtos/#631c0f1008c3

diff -r 209f4db62daf -r 6b1a6941ac87 mbed.bld
--- a/mbed.bld	Tue Jun 04 16:01:32 2013 +0100
+++ b/mbed.bld	Thu Sep 18 10:32:43 2014 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/mbed_official/code/mbed/builds/
\ No newline at end of file
+http://mbed.org/users/mbed_official/code/mbed/builds/552587b429a1
\ No newline at end of file