S32K14

[gravity_one]

all dear：

PROJECT : 1、freeRTos  2、power manager  3、CAN

freeRTos+power manager into POWER_STATE_VLPS mode is ok，

but add init CAN ，into POWER_STATE_VLPS is fail，and MCU is restart，why？

can you help me？

thanks

grayli

[danielmartynek]

Hello grayli.wang@cdskysoft.com,

Do you put the FlexCAN module into Freeze mode before VLPS?

Thanks,

BR, Daniel

[gravity_one]

hi，Daniel

i add function：

void CAN_Freeze_mode(uint8_t instance,bool enable)
{
CAN_Type * base = g_flexcanBase[instance];
DEV_ASSERT(instance < CAN_INSTANCE_COUNT);
if(enable)
FLEXCAN_EnterFreezeMode(base);
else
FLEXCAN_ExitFreezeMode(base);
}

1、
into VLPS mode ，before set CAN_Freeze_mode(INST_CANCOM1,1);

but mcu restart

2、
into VLPS mode ，before set FLEXCAN_DRV_Deinit(INST_CANCOM1);
is ok，but i need CAN_IRQ wake up MCU，

3、
i need add CAN_ID filter？
FLEXCAN_DRV_ConfigRxMb(INST_CANCOM1, RX_MAILBOX, &dataInfo, 0x0);
FLEXCAN_DRV_SetRxMbGlobalMask(instance,FLEXCAN_MSG_ID_STD,0x1);
but CAN receive all ID.
Not only should you receive (CAN_ID) 0x0 and 0x1??

why is all ID?

sorry ,so much issue,I just started learning NXP MCU.

can you help me,please

thanks 

BRS

Grayli

[danielmartynek]

Hi grayli.wang@cdskysoft.com,

The FlexCAN module is not a wake-up source in VLPS (7.3.1 Wake-up sources, RM rev.11).
But PORT interrupts are functional in all digital pin muxing modes including CAN_RX (12.6.1 Pin Control Register n (PORT_PCRn)) and can bring the MCU from VLPS.

BR, Daniel

[gravity_one]

hello，Daniel

deinit CAN and set CAN pin to muxing mode，before into VLPS

thanks

BRS

Grayli

[danielmartynek]

Hi grayli.wang@cdskysoft.com,

The PORT interrupt (wake-up event) on the corresponding pin is functional in VLPS even if the FlexCAN module is initialized and the pin is routed to the CAN_RX function in PCR[MUX].

BR, Daniel 

[gravity_one]

hello，Daniel

i test CAN set to port interrupt can wake on MCU form sleep mode ;

but again init CAN ,MCU restart.

can you help solve why MCU restart？

[danielmartynek]

Hello grayli.wang@cdskysoft.com,

I assume that you are running the application stand-alone without any debugger connected.

So, I would place an infinite loop in the wake-up ISR (variable = 1; while(variable){}) and then attach a debugger without resetting the MCU and step the code, examine registers, check if clocks are enabled. Do you have HardFault ISR in your code implemented? 

BR, Daniel

[gravity_one]

hi，Daniel

thanks,into Freeze mode，CAN_IRQ can wake up  in VLPS?

BRS

grayli