Kinetis MicrocontrollersのトピックRe: Low Power Mode entering after Boot.

Low Power Mode entering after Boot.

MichaelDavid — Mon, 12 Sep 2011 20:02:20 GMT

I have a problem with my custom board. I wrote a simple application using MQX and it works fine on the TWR-k60, using the PEmicru Multilink Universal. Using the same setup on my custom board, make the debugger enter directly to Low Power Mode waiting an ISR. I saw something about the NV_FOPT register than can avoid entering Low Power mode, but I can't see how to configure it. please help.

Re: Low Power Mode entering after Boot.

MichaelDavid — Wed, 14 Sep 2011 14:22:44 GMT

The problem maybe caused by an unhandled interrupt. How can I see which interrupt caused the problem?

Re: Low Power Mode entering after Boot.

konrada_anton — Wed, 14 Sep 2011 17:53:48 GMT

Check SCB_ICSR (in CodeWarrior debugger under "System Control Registers"). The lowest 8b contain the active exception number. (3 is hard fault; then SCB_HFSR gives further information.)

HTH,

Re: Low Power Mode entering after Boot.

MichaelDavid — Thu, 15 Sep 2011 19:36:48 GMT

Here is all the list of my system control registers (value, address) can you understand what is the unhandled interrupt?

by the way I see a problem in the TWR-K60 board with a simple MQX "hello world" project when I take out the TWR-SER board. maybe its the same problem as in my custom board.? Thanks for the help.

SCB_ACTLR: 0x0, 0xe000e008

SCB_CPUID: 0x410fc240, 0xe000ed00

SCB_ICSR: 0x803, 0xe000ed04

SCB_VTOR: 0x0, 0xe000ed08

SCB_AIRCR: 0xfa050000, 0xe000ed0c

SCB_SCR: 0x0, 0xe000ed10

SCB_CCR: 0x200, 0xe000ed14

SCB_SHPR1: 0x0, 0xe000ed18

SCB_SHPR2: 0x10000000, 0xe000ed1c

SCB_SHPR3: 0x40000000, 0xe000ed20

SCB_SHCSR: 0x0, 0xe000ed24

SCB_CFSR: 0x8200, 0xe000ed28

SCB_HFSR: 0x40000000, 0xe000ed2c

SCB_DFSR: 0x8, 0xe000ed30

SCB_MMFAR: 0x4003d010, 0xe000ed34

SCB_BFAR: 0x4003d010, 0xe000ed38

SCB_AFSR: 0x0, 0xe000ed3c

SYST_CSR: 0x7, 0xe000e010

SYST_RVR: 0x17700, 0xe000e014

SYST_CVR: 0x174ba, 0xe000e018

SYST_CALIB: 0x0, 0xe000e01c

Re: Low Power Mode entering after Boot.

konrada_anton — Thu, 15 Sep 2011 20:22:14 GMT

ICSR lowest byte = 3 means hard fault,

HFSR bit 30 is set, means FORCED, "bus fault / memory management fault / usage fault".

BFAR contains the address of the RTC_CR. Have you put a one in the RTC's SIM_SCGCx bit?

Re: Low Power Mode entering after Boot.

MichaelDavid — Thu, 15 Sep 2011 22:02:03 GMT

My Mistake the TWR-K60 works fine with or without the TWR-SER.

Re: Low Power Mode entering after Boot.

MichaelDavid — Thu, 15 Sep 2011 22:41:00 GMT

Thank You!!! the problem was inverse diode in the RTC interface.