topic Debug mode of WDOG in Vybrid Processors

Debug mode of WDOG

soichiyamamoto — Thu, 06 Mar 2014 13:31:28 GMT

Hi,

I use Debug mode of WDOG, but WDOG timer does not stop evenif I set WDBG.

I set a register of WDOG in the following procedure.

①WDOG timer start：WDOG_WCR=0x3F34

②Suspend the watchdog timer(Debug mode)：WDOG_WCR=0x3F32　or 0x3F36

※WDOG_WCR regster read is WDOG_WCR[WDBG] = 0.

Q1)Is this setting procedure right?

Q2)Please ｇive me a sample program of the WDOG setting.

Best regards,

soichi

Re: Debug mode of WDOG

juangutierrez — Thu, 13 Mar 2014 22:53:29 GMT

I will try to check for a sample.

Meanwhile make sure you have the right address of the WDOG_BASE in the next file

\MVF50GS10MK50.h

Is wrongly pointing to 0x0, so you should remove that and add the correct base address as follows

#ifdef ARMCC_A5

#define WDOG_BASE (0x4003E000u)

#else /* M4 */

#define WDOG_BASE (0x4003F000u)

#endif

Re: Re: Debug mode of WDOG

soichiyamamoto — Fri, 14 Mar 2014 08:08:46 GMT

Hi,

Thank you for reply.

I use the following setting.

"#define WDOG_BASE (0x4003E000u)"

Sorry, Please try to consider it.

Best regards,

soichi

Re: Debug mode of WDOG

juangutierrez — Tue, 18 Mar 2014 17:33:08 GMT

In Reference Manual there is a mismatch in section 26.6.1 Watchdog Control Register (WDOG_WCR) between the table and the graphic for WCR register

Dismiss the graphic. Table provides the correct information.

Besides that, I think your code is fine for a timeout around 32s

However take into consideration that the power-down counter is not affected by debug mode entry/exit.

For example, check next code

void wdbg_test()

{

reset_occurred = 0;

interrupt_handlers[128]= INTR_ROUTINE; // reset_occurred will be set inside this routine

SRC.SICR.B.WDOG_RST = 0x01; //Configure WDOGA5 reset as interrupt

// Starting WDOG debug mode test case

WDOGA5.WCR.R = 0x2736; //timeout 20s

printf("Start watchdog");

WDOGA5.WCR.B.WDE = 1;

printf("Wait here in debug mode for 20s... reset should not come");

//To continue: Manually disable the WDBG here

while(reset_occurred != 1); //Wait here for interrupt

}