Hi,
1. I would recommend to read:
Introduction to Watchdog Timers | Embedded
I found this as a first link on google - nice point to start...
2. How to reset the device using SWT:
Regards,
Lukas
Hi,
Thank you for your reply.
Now,first,I use one timer to periodic execution of a watchdog servicing operation.Here are my code:
while(1)
{
while(PIT_0.TIMER[0].TFLG.B.TIF==1)
{
PIT_0.TIMER[0].TFLG.B.TIF=1;
PIT_0.TIMER[0].TCTRL.R=0;
SWT_0_service();
PIT_0.TIMER[0].LDVAL.R=6650000-1;
PIT_0.TIMER[0].TCTRL.R=1;
}
Second,SWT reset is reported via FCCU into RGM(SWT0->FCCU/NCF[14]->FOSU->RGM->reset)?Is there a way reset the system by the SWT_0.IR.B.TIF directly?
Here are some config:
about SWT:
static void SWT_Init(void)
{
/* Provide a Key to unlock SWT configuraiton registers */
SWT_0.SR.R = 0xC520;
SWT_0.SR.R = 0xD928;
/* Wait for solf-lock bit */
while (SWT_0.CR.B.SLK == 0x1);
/* Enable SWT_0 */
SWT_0.CR.B.WEN = 0x1;
/* Set SWT timeout */
SWT_0.TO.R = 0x000FFFFF; //2^20-1=1048575
SWT_0.CR.R = 0xFF000101; //MAP0-7，SMD=00;RIA=1;WEN=1;
}
about FCCU:
void FCCU_Config()
{
FCCU_read_fault();
FCCU_clear_faults();
FCCU.TRANS_LOCK.B.TRANSKEY = 0xBC; //0xBC unlock,other lock;
FCCU.CTRLK.R = 0x913756AF; //Unlock OP1,other do nothing
FCCU.CTRL.R = 0x1; //Operation1 Put FCCU in Configuration state.
while (FCCU.CTRL.B.OPS != 0x3);
FCCU.NCF_E[0].R=0xFFFFFFFF; //enable all channel
FCCU.NCFS_CFG[0].R = 0x10000000; //short reset
FCCU.NCF_TOE[0].R=0xFFFFFFFF; //moves into the ALARM state
FCCU.IRQ_ALARM_EN[0].R=0xFFFFFFFF; //Alarm is enabled for error source x
FCCU.NCF_TO .R=0xFFFF; //Timeout = (TO) × T RC16MHz 4.96ms<Tfosu
FCCU.CTRLK.R = 0x825A132B; //key for OP2
FCCU.CTRL.R = 0x2; //set the OP2 - set up FCCU into the NORMAL mode
while (FCCU.CTRL.B.OPS != 0x3); //operational status successful
}
about RGM:
void RGM_Init()
{
RGM.DES.B.F_FFRR=0; //No FCCU failure to react reset event has occurred
RGM.DES.B.F_SOFT_DEST=0;//No software ‘destructive’ reset event has occurred
RGM.DERD.B.D_FFRR=0;// FCCU failure to react reset event triggers a reset sequence
RGM.DERD.B.D_SOFT_DEST=0;//A software ‘destructive’ reset triggers a reset sequence
}
Are there some wrong?How can I config the FOSU if necessary.
Regards,
Tao
