Diff: BCN.cpp

Revision:

25:90cdfbadea91

Parent:

24:ca96cddf25d0

--- a/BCN.cpp	Mon Nov 02 14:46:12 2015 +0000
+++ b/BCN.cpp	Sat Nov 07 10:23:10 2015 +0000
@@ -5,6 +5,8 @@
 //Takes max 4.3 sec in void FCTN_BCN_TX_MAIN() (temp.calc. + long_beacon + short_beacon) 
 
 Serial pc_bcn(USBTX, USBRX);        //tx,rx
+//SPI spi(D11, D12, D13);              // mosi, miso, sclk 
+//DigitalOut cs(D10);                //slave select or chip select
 SPI spi(PIN16, PIN17, PIN15);              // mosi, miso, sclk 
 DigitalOut cs(PIN6);                //slave select or chip select
 Timer t_i;//timer for checking the time taken by (temp.calc. + long_beacon + short_beacon)
@@ -18,8 +20,10 @@
 uint8_t BCN_TX_EN = 1;              //hardcoding for now    //check where is this variable toggled??
 uint8_t BCN_FEN = 0;                //hardcoding for now    //write this value to flash
 uint8_t BCN_STANDBY = 0;            //hardcoding for now    //check where is this variable toggled??
-uint8_t BCN_TS_BUFFER = 0;              // For Temperature 
-
+uint8_t BCN_TS_BUFFER = 0;          // For Temperature
+uint8_t ERROR_CHECK = 0;
+uint8_t BCN_FAIL_COUNT = 0;         //Flag for keeping count of no. of times of BCN failure in init or one transmission in 30 secs (failure in spi communication)
+                                    //This Flag when exceeds a threshold, uC should reset.
 void FCTN_BCN_INIT()
 {
     pc_bcn.printf("FCTN_BCN_INIT\n");
@@ -36,6 +40,7 @@
 }
 void FCTN_BCN_TX_MAIN()
 {
+    ERROR_CHECK=0;
     pc_bcn.printf("FCTN_BCN_TX_MAIN\n");
     t_i.start();
     int begin = t_i.read_us();
@@ -89,6 +94,7 @@
     t_i.stop();
     int end = t_i.read_us();
     pc_bcn.printf("The time required for FCTN_BCN_TX_MAIN is %d useconds\r\n", end-begin);
+    ERROR_CHECK = 0;
     
 }
 
@@ -170,11 +176,11 @@
     wait(0.1);// takes time to set to tx mode hence the delay of 0.1.  
     
     //Check for fifoThresh
-    while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;
+    while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1) reset_rfm(1);
     timeout_count=10e5;
     
     //Check for packet_sent
-    while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)break;
+    while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)break;else if(timeout_count == 1) reset_rfm(1);
     
     //pc_bcn.printf("Short packet sent\r\n");
     
@@ -212,7 +218,7 @@
     wait(0.1);//necessary
     
     //Check for fifoThresh
-    while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;
+    while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1) reset_rfm(1);
     timeout_count=10e5;
     
     cs = 0;
@@ -224,22 +230,29 @@
     cs = 1;
     wait(0.1);
     //Check for fifoThresh
-    while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;
+    while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1) reset_rfm(1);
     timeout_count=10e5;
     
     //Check for packetsent interrupt
-    while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)break;
+    while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)break;else if(timeout_count == 1) reset_rfm(1);
          
     //pc_bcn.printf("Long packet sent\r\n");
     
     writereg(RF22_REG_07_OPERATING_MODE1,0x00);        //standby mode
 }
-void reset_rfm()
+void reset_rfm(uint8_t fl)
 {
-    FCTN_BCN_INIT();
+if (fl ==1 && ERROR_CHECK ==0)  
+        {BCN_FAIL_COUNT++;
+        ERROR_CHECK=1;
+        printf("BCN_FAIL_COUNT++\n");}
+    else if(fl == 0)
+        {BCN_FAIL_COUNT = 0;
+        ERROR_CHECK=0;}
 }
 void writereg(uint8_t reg,uint8_t val)
 {
+    
     uint8_t count = 0; 
     for(;;count++)
     {
@@ -253,8 +266,9 @@
             }
             else if(count == 5)
             {
-                reset_rfm(), printf("reg = 0x%X\n",reg);break;
+                reset_rfm(1); printf("reg = 0x%X\n",reg);break;
             }
+            else init_spi();
         }
         else
         break;
@@ -290,23 +304,32 @@
     writereg(RF22_REG_77_NOMINAL_CARRIER_FREQUENCY0, fc & 0xff);
     return 0;
 }
-
-
-void Init_BEACON_HW()
+void init_spi()
 {
-    wait(0.1);
     cs=1;                          // chip must be deselected
     wait(0.1);
     spi.format(8,0);
     spi.frequency(10000000);       //10MHz SCLK
+}
+void Init_BEACON_HW()
+{
+    ERROR_CHECK=0;
+    wait(0.1);
+    int i = 5;
+    while(i--)
+    {
+    init_spi();
     
     //should either have a flag for invalid SPI or discard this for actual case or add reset
     if (readreg(RF22_REG_00_DEVICE_TYPE) == 0x08)
-        pc_bcn.printf("spi connection valid\r\n");
-    else
+        {pc_bcn.printf("spi connection valid\r\n");
+        reset_rfm(0);break;}
+    else if (i == 1)
         {pc_bcn.printf("error in spi connection\r\n");
-        reset_rfm();
+        reset_rfm(1);
+        return;
         }
+    }
     
     writereg(RF22_REG_07_OPERATING_MODE1,0x80);        //sw_reset
     wait(0.1);                    //takes time to reset                                  
@@ -328,11 +351,15 @@
     writereg(RF22_REG_0C_GPIO_CONFIGURATION1,0x12); // RX state                        
 
     setFrequency(435.0);
-
+    
+    i=3;
+    while(i--)
     if((readreg(RF22_REG_02_DEVICE_STATUS)& 0x08)!= 0x00)
         {
-            pc_bcn.printf("frequency not set properly\r\n");
-            reset_rfm();
+            setFrequency(435.0);
+            if (i==1)
+            {pc_bcn.printf("frequency not set properly\r\n");
+            reset_rfm(1);}
         }
 
     //set Modem Configuration
@@ -347,6 +374,7 @@
     writereg(RF22_REG_6D_TX_POWER,0x07);    //20dbm
     
     //TX_packet_length written later
+    ERROR_CHECK = 0;
 }
 bool Check_ACK_RECEIVED()
 {
@@ -361,7 +389,7 @@
         return 0;
     }
 }
-/*int main()
+int main()
 {
     FCTN_BCN_INIT(); 
     
@@ -369,4 +397,4 @@
     
     while(1);
     
-}*/
\ No newline at end of file
+}
\ No newline at end of file