Revision 138:71ed56f2ec50, committed 2016-03-30

Comitter:

Piasiv1206

Date:

Wed Mar 30 13:03:24 2016 +0000

Parent:

137:6fcbbaf19284

Commit message:

jkhdsoi

Changed in this revision

--- a/crc.h	Sat Mar 12 10:42:22 2016 +0000
+++ b/crc.h	Wed Mar 30 13:03:24 2016 +0000
@@ -74,4 +74,39 @@
     }
     
     return remainder;
-}
\ No newline at end of file
+}
+
+uint16_t crc16_gen1( char message[], unsigned int nBytes){
+    crctype16 remainder = 0xffff;
+    int byte;
+    char bit;
+    
+    for( byte = 0 ; byte < nBytes ; byte++ ){
+        /*
+        Bring the data byte by byte
+        each time only one byte is brought
+        0 xor x = x
+        */
+        remainder = remainder ^ ( message[byte] << 8 );
+        
+        for( bit = 8 ; bit > 0 ; bit--){
+            /*
+            for each bit, xor the remainder with polynomial
+            if the MSB is 1
+            */
+            if(remainder & TOPBIT16){
+                remainder = (remainder << 1) ^ POLYNOMIAL16;
+                /*
+                each time the remainder is xor-ed with polynomial, the MSB is made zero
+                hence the first digit of the remainder is ignored in the loop
+                */
+            }
+            else{
+                remainder = (remainder << 1);
+            }
+        }
+    }
+    
+    return remainder;
+}
+

--- a/i2c.h	Sat Mar 12 10:42:22 2016 +0000
+++ b/i2c.h	Wed Mar 30 13:03:24 2016 +0000
@@ -12,7 +12,7 @@
 bool read_ack = true;
 
 
-char PL_I2C_DATA[134];//Payload i2c array
+
 uint8_t PL_TM_SIZE;//size of data to bev read from i2c
 
 void FCTN_I2C_WRITE_PL(char *data2,uint8_t tc_len2)
@@ -93,6 +93,8 @@
 }
 
 
+const int addr1 = (0x20<<1|0);
+const int addr2 = (0x20<<1|1);
 
 
 
@@ -103,9 +105,7 @@
 
 void isr_pyldtm()
 {
-    
-    master.read(addr_pl|1,PL_I2C_DATA,13);
     gLEDR=!gLEDR;
-    
+    master.read(addr1,PL_I2C_DATA,134);
     rcv_isr = 1;
 }
\ No newline at end of file

--- a/main.cpp	Sat Mar 12 10:42:22 2016 +0000
+++ b/main.cpp	Wed Mar 30 13:03:24 2016 +0000
@@ -2,6 +2,7 @@
 
 #include "mbed.h"
 
+char PL_I2C_DATA[150];//Payload i2c array
 uint8_t rcv_isr = 0; // flag for interrupt
 
 #define DEBUG 1
@@ -42,7 +43,7 @@
     uint16_t CRC_VALUE = 0 ;
     
     pia1[0]    = 123  ;
-    pia1[1]    = 0xff ;
+    pia1[1]    = 0x00 ;
     pia1[2]    = 0x81 ;
     pia1[3]    = 0xD0 ;
     pia1[4]    = 0x00 ;
@@ -50,7 +51,7 @@
     pia1[6]    = 0x00 ;
     pia1[7]    = 0x00 ;
     pia1[8]    = 0x00 ;
-    CRC_VALUE  = 0 ;
+    CRC_VALUE  = crc16_gen1(pia1,9); 
     pia1[9]    = (char)((CRC_VALUE >> 8) & 0xff);
     pia1[10]   = (char)((CRC_VALUE >> 0) & 0xff);
     
@@ -139,21 +140,25 @@
     break;}
     }*/
     INIT_TC_TEMP();
+    master.frequency(400000);
     int i =0 ;
     char test[1] ;
     test[0] = 7;
     while(1)
     {
+        wait(5);
         //test[0] = gPC.getc();
         gPC.printf("Wriring to I2C\n\r");
         
-        wait(10);
+        
         
         master.write(addr_pl|0x00,pia1,11);
         
+        wait (2);
+        
         if(rcv_isr == 1)
         {
-            for(i = 0; i < 13 ; i++)
+            for(i = 0; i < 134 ; i++)
             {
                 gPC.printf("%d\r\n",PL_I2C_DATA[i]);
                 PL_I2C_DATA[i] = 0 ;