Revision 1:953885edf7a7, committed 2015-04-05

Comitter:

sureshsusurla

Date:

Sun Apr 05 07:51:03 2015 +0000

Parent:

0:ac874e417fac

Commit message:

mAG_RM3000

Changed in this revision

--- a/main.cpp	Fri Feb 13 16:11:47 2015 +0000
+++ b/main.cpp	Sun Apr 05 07:51:03 2015 +0000
@@ -1,61 +1,29 @@
-
-//magnetometer V1.3
+//magnetometer V1.2
 
 #include "mbed.h"
 #include "SPI.h"
 #include "math.h"
 #include "stdlib.h"
 Serial pc(USBTX,USBRX);
-SPI spi(PTD6,PTD7,PTD5);  //MOSI,MISO,SCLK
-DigitalOut SSN_MAG(PTD4);  //SLAVE SELECT
-InterruptIn DRDY(PTD2);
+SPI spi(PTE18,PTE19,PTE17);  //MOSI,MISO,SCLK
+DigitalOut SSN_MAG(PTB11);  //SLAVE SELECT
+DigitalIn DRDY(PTA17);
 Timeout tr_mag;
 uint8_t trflag_mag;
 void trsub_mag();
-int a;
 //void end();
 
+/*void end()
+{
+    pc.printf("varun");
+    exit(1);
+    
+    }*/
 void trsub_mag()
 {
   trflag_mag=0;
 }  
   
-void func()
-{
-   // a=1;
-    //wait_ms(100);
-    SSN_MAG=0;
-    spi.write(0xc9);                  //command  byte for retrieving data
-    //printf("\n\rahoy\n\r");
-    unsigned char axis;
-    float Bnewvalue[3]={0.0,0.0,0.0};
-    int32_t Bvalue[3]={0,0,0}; 
-    int32_t a= pow(2.0,24.0);
-    int32_t b= pow(2.0,23.0);
- 
-    for(axis=0;axis<3;axis++)
-    {
-        Bvalue[axis]=spi.write(0x00)<<16;    //MSB 1 is send first 
-        wait_ms(100);
-        Bvalue[axis]|=spi.write(0x00)<<8;    //MSB 2 is send next
-        wait_ms(100);
-        Bvalue[axis]|=spi.write(0x00);       //LSB is send.....total length is 24 bits(3*8bits)...which are appended to get actual bit configuration
-  
-   
-        if((Bvalue[axis]&b)==b)              
-        {
-            Bvalue[axis]=Bvalue[axis]-a;   //converting 2s complement to  signed decimal
-
-        }
-        Bnewvalue[axis]=(float)Bvalue[axis]*22.0*pow(10.0,-3.0);  //1 LSB=(22nT)...final value of field obtained in micro tesla
-  
-        wait_ms(100);
-        pc.printf("\t%f\n",Bnewvalue[axis]);
-
-    }
-    SSN_MAG=1;
-}
-
 
 void FUNC_ACS_MAGNETOMETER_INIT();
 void FUNC_ACS_MAGNETOMETER_EXECUTE();
@@ -63,17 +31,12 @@
 void main()
 {
 
-DRDY.rise(&func);
 FUNC_ACS_MAGNETOMETER_INIT();
 while(1)
-{
-
-pc.printf("start\n");
-wait(2);
+{pc.printf("start\n");
 FUNC_ACS_MAGNETOMETER_EXECUTE();
 
-} 
-}
+} }
  
  void FUNC_ACS_MAGNETOMETER_INIT()
  {
@@ -101,23 +64,54 @@
 
 void FUNC_ACS_MAGNETOMETER_EXECUTE()
 {
-    SSN_MAG=0;                                //enabling slave to measure the values
-    wait_ms(100);
-    spi.write(0x82);                     //initiates measurement
-    wait_ms(100);
-    spi.write(0x01);                   //selecting x,y and z axes, measurement starts now
-    SSN_MAG=1;
-  
+   SSN_MAG=0;                                //enabling slave to measure the values
+  wait_ms(100);
+  spi.write(0x82);                     //initiates measurement
+  wait_ms(100);
+  spi.write(0x01);                   //selecting x,y and z axes, measurement starts now
+  SSN_MAG=1;
+
 
-    trflag_mag=1;
-    tr_mag.attach(&trsub_mag,1);
- //a=0;
-// while(trflag_mag)
- //{
+ trflag_mag=1;
+ tr_mag.attach(&trsub_mag,1);
+ 
+ while(trflag_mag)
+ {
+ if(DRDY==1)
+ {wait_ms(100);
+  SSN_MAG=0;
+ spi.write(0xc9);
+  pc.printf(" ye");                  //command  byte for retrieving data
+ 
+ unsigned char axis;
+ float Bnewvalue[3]={0.0,0.0,0.0};
+ int32_t Bvalue[3]={0,0,0}; 
+ int32_t a= pow(2.0,24.0);
+ int32_t b= pow(2.0,23.0);
  
- //if(a==1)
+ for(axis=0;axis<3;axis++)
+  {
+  Bvalue[axis]=spi.write(0x00)<<16;    //MSB 1 is send first 
+  wait_ms(100);
+  Bvalue[axis]|=spi.write(0x00)<<8;    //MSB 2 is send next
+  wait_ms(100);
+  Bvalue[axis]|=spi.write(0x00);       //LSB is send.....total length is 24 bits(3*8bits)...which are appended to get actual bit configuration
+  
+   
+  if((Bvalue[axis]&b)==b)              
+   {
+     Bvalue[axis]=Bvalue[axis]-a;   //converting 2s complement to  signed decimal
+
+  }
+   Bnewvalue[axis]=(float)Bvalue[axis]*22.0*pow(10.0,-3.0);  //1 LSB=(22nT)...final value of field obtained in micro tesla
+  
+  wait_ms(100);
+ pc.printf("\t%f\n \r",Bnewvalue[axis]);
+
+ }
+ SSN_MAG=1;break;
+ }
+ }
+ pc.printf("exit");
  
-// }
-    pc.printf("exit");
- 
-}
\ No newline at end of file
+ }
\ No newline at end of file