Kinetis MicrocontrollersのトピックRe: programming kw40z by jlink

programming kw40z by jlink

shinezen — Mon, 15 Aug 2016 01:34:44 GMT

hello:

i programming kw40z board by jlink (IAR).

the error message ( failed to get cpu status after 4 retries retry ) appear final step go .

how can i do to solve this problem?

Re: programming kw40z by jlink

pavel_krenek — Mon, 15 Aug 2016 07:44:10 GMT

Hi,

looks as issue with power supply of MCU. Also you can check if the correct debug connection is selected in IAR (SWD or J-LINK) for Cortex M0+ base MCU has to be SWD.

What kind of debug interface are you using external or integrated in the board for example on freedom board ?

Best regard,

Pavel

Re: programming kw40z by jlink

shinezen — Mon, 15 Aug 2016 09:19:29 GMT

HI Pavel :

My MCU power from power supplier.

i think i have been programming it but i don't know why i reset power ,the kw40z return initial step .

thanks for you help

Re: programming kw40z by jlink

pavel_krenek — Tue, 16 Aug 2016 07:41:05 GMT

Hi,

are you able to do the some steps in the code ? If yes you can check what should be the source of reset.

Regards,

Pavel