add PIC watchdog

306-controller_interface.X/mcc_generated_files/device_config.c

@@ -73,8 +73,8 @@
 #pragma config XINST = OFF    // Extended Instruction Set Enable bit->Extended Instruction Set and Indexed Addressing Mode disabled
 
 // CONFIG3L
-#pragma config WDTCPS = WDTCPS_31    // WDT Period selection bits->Divider ratio 1:65536; software control of WDTPS
-#pragma config WDTE = OFF    // WDT operating mode->WDT Disabled; SWDTEN is ignored
+#pragma config WDTCPS = WDTCPS_6    // WDT Period selection bits->Divider ratio 1:2048
+#pragma config WDTE = SWDTEN    // WDT operating mode->WDT enabled/disabled by SWDTEN bit
 
 // CONFIG3H
 #pragma config WDTCWS = WDTCWS_7    // WDT Window Select bits->window always open (100%); software control; keyed access not required

306-controller_interface.X/mcc_generated_files/mcc.c

@@ -53,6 +53,7 @@ void SYSTEM_Initialize(void)
     PMD_Initialize();
     PIN_MANAGER_Initialize();
     OSCILLATOR_Initialize();
+    WWDT_Initialize();
     TMR0_Initialize();
     ECAN_Initialize();
 }
@@ -92,6 +93,50 @@ void PMD_Initialize(void)
 }
 
 
+void WWDT_Initialize(void)
+{
+    // Initializes the WWDT to the default states configured in the MCC GUI
+    WDTCON0 = WDTCPS;
+    WDTCON1 = WDTCWS|WDTCCS;
+    
+}
+
+void WWDT_SoftEnable(void)
+{
+    // WWDT software enable. 
+    WDTCON0bits.SEN=1;
+}
+
+void WWDT_SoftDisable(void)
+{
+    // WWDT software disable.
+    WDTCON0bits.SEN=0;
+}
+
+bool WWDT_TimeOutStatusGet(void)
+{
+    // Return the status of WWDT time out reset.
+    return (PCON0bits.nRWDT);
+}
+
+bool WWDT_WindowViolationStatusGet(void)
+{
+   // Return the status of WWDT window violation reset.
+    return (PCON0bits.nWDTWV); 
+}  
+
+void WWDT_TimerClear(void)
+{
+    // Disable the interrupt,read back the WDTCON0 reg for arming, 
+    // clearing the WWDT and enable the interrupt.
+    uint8_t readBack=0;
+    
+    bool state = GIE;
+    GIE = 0;
+    readBack = WDTCON0;
+    CLRWDT();
+    GIE = state;
+}
 /**
  End of File
 */

306-controller_interface.X/mcc_generated_files/mcc.h

@@ -57,6 +57,9 @@
 #include "tmr0.h"
 #include "ecan.h"
 
+#define WDTCWS  7
+#define WDTCCS  48
+#define WDTCPS  12
 
 
 /**
@@ -98,6 +101,84 @@ void OSCILLATOR_Initialize(void);
  */
 void PMD_Initialize(void);
 
+/**
+ * @Param
+    none
+ * @Returns
+    none
+ * @Description
+    Initializes the WWDT to the default states configured in the
+ *                  MCC GUI
+ * @Example
+    WWDT_Initialize();
+ */
+void WWDT_Initialize(void);
+
+
+/**
+ * @Param
+    none
+ * @Returns
+    none
+ * @Description
+   Enable the WWDT by setting the SEN bit.
+ * @Example
+    WWDT_SoftEnable();
+ */
+void WWDT_SoftEnable(void);
+
+/**
+ * @Param
+    none
+ * @Returns
+    none
+ * @Description
+   Disable the WWDT by clearing the SEN bit.
+ * @Example
+    WWDT_SoftDisable();
+ */
+void WWDT_SoftDisable(void);
+
+/**
+ * @Param
+    none
+ * @Returns
+    none
+ * @Description
+   Disable the interrupt, arm the WWDT by reading back the WDTCON0 register
+ * clear the WWDT and enable the interrupt.
+ * @Example
+    WWDT_TimerClear();
+ */
+void WWDT_TimerClear(void);
+
+/**
+ * @Param
+    none
+ * @Returns
+   High --> WWDT reset has not occurred. 
+ * Low  --> WWDT reset has  occurred.
+ * @Description
+    Returns the status of whether the WWDT reset has occurred or not.
+ * @Example
+    if(WWDT_TimeOutStatusGet())
+ */
+bool WWDT_TimeOutStatusGet(void);
+
+/**
+ * @Param
+    none
+ * @Returns
+   High --> WWDT window violation reset has not occurred. 
+ * Low  --> WWDT window violation reset has  occurred.
+ * @Description
+    Returns the status of, whether the WWDT window violation 
+ *  reset has occurred or not.
+ * @Example
+    if(WWDT_WindowViolationStatusGet())
+ */
+bool WWDT_WindowViolationStatusGet(void);
+      
 
 #endif	/* MCC_H */
 /**