Hi,
the WDT functionality is more difficult to test because debugger losts communication after reset and it is not synchronized.
The best way is to use different appoach, in simpple words we use, "blink the diode" or put some signal at the pin. This is standard approach we use.
As an example, here is one my code "Reset source recognition - S12ZVL":
//------------------------------------------------------------------------------
#include <hidef.h> /* for EnableInterrupts macro */
#include "derivative.h" /* include peripheral declarations */
//------------------------------------------------------------------------------
#define LED_ID_BLUE 1
#define LED_ID_BLUERED 4
#define LED_ID_BLUEGREEN 6
#define LED_ID_RED 3
#define LED_ID_REDBLUE 4
#define LED_ID_REDGREEN 8
#define LED_ID_GREEN 5
#define LED_ID_GREENBLUE 6
#define LED_ID_GREENRED 8
#define LED_ID_BLUEREDGREEN 9
#define LED_BLUE PTP_PTP1
#define LED_RED PTP_PTP3
#define LED_GREEN PTP_PTP5
#define ON 0
#define OFF 1
#define LED_OFF_BLUE PTP_PTP3 = OFF;
#define LED_OFF_RED PTP_PTP1 = OFF;
#define LED_OFF_GREEN PTP_PTP5 = OFF;
#define LED_ON_BLUE PTP_PTP3 = ON;
#define LED_ON_RED PTP_PTP1 = ON;
#define LED_ON_GREEN PTP_PTP5 = ON;
//------------------------------------------------------------------------------
void blink(unsigned char led_id, unsigned long rpt, unsigned long dly);
void delay(unsigned long dly);
//------------------------------------------------------------------------------
void blink(unsigned char led_id, unsigned long rpt, unsigned long dly)
{
rpt = rpt * 2;
while(rpt--)
{
// blue
if(led_id == LED_ID_BLUE || led_id == LED_ID_BLUERED || led_id == LED_ID_BLUEGREEN || led_id == LED_ID_BLUEREDGREEN)
LED_BLUE = (LED_BLUE == 1) ? 0 : 1;
//red
if(led_id == LED_ID_RED || led_id == LED_ID_REDBLUE || led_id == LED_ID_REDGREEN || led_id == LED_ID_BLUEREDGREEN)
LED_RED = (LED_RED == 1) ? 0 : 1;
//green
if(led_id == LED_ID_GREEN || led_id == LED_ID_GREENBLUE || led_id == LED_ID_GREENRED || led_id == LED_ID_BLUEREDGREEN)
LED_GREEN = (LED_GREEN == 1) ? 0 : 1;
delay(dly);
}
}
//------------------------------------------------------------------------------
void delay(unsigned long dly)
{
while(dly--)
asm nop;
}
//------------------------------------------------------------------------------
void main(void)
{
//-------------------------------
DDRP_DDRP1 = 1; //LEDBLUE PORT
DDRP_DDRP3 = 1; //LEDRED PORT
DDRP_DDRP5 = 1; //LEDGREEN PORT
//-------------------------------
LED_OFF_BLUE;
LED_OFF_RED;
LED_OFF_GREEN;
//-------------------------------
blink(LED_ID_BLUE,1,0x1FFFF);
blink(LED_ID_BLUERED,1,0x1FFFF);
blink(LED_ID_BLUEGREEN,1,0x1FFFF);
blink(LED_ID_RED,1,0x1FFFF);
blink(LED_ID_REDGREEN,1,0x1FFFF);
blink(LED_ID_GREEN,1,0x1FFFF);
blink(LED_ID_BLUEREDGREEN,1,0x1FFFF);
//-------------------------------
if (CPMURFLG_COPRF)
{
blink(LED_ID_BLUE,5,0x3FFFF);
}
//-------------------------------
if (CPMURFLG_PORF)
{
blink(LED_ID_RED,5,0x1FFFF);
}
//-------------------------------
CPMURFLG = 0x6B; //clear all flags
for(;;)
{
CPMUCOP=0x07; //init COP watchdog
CPMUARMCOP=0x00; //immediate reset MCU
}
//-------------------------------
}
//------------------------------------------------------------------------------
Best regards,
Ladislav
