topic Re: Jtag debugging issue with my custom build circuit in LPC Microcontrollers

Jtag debugging issue with my custom build circuit

rajeshjat56 — Thu, 20 Dec 2018 04:52:00 GMT

I am not able to debug my lpc 2292 board, i think i am having some hardware issue, signals are as per schematic image.

I have attached my JTAG connector and controller connection.

Rtclk is pull down with 4.7k resistor and boot loader is also pull down for programing.

Please help me,it is not debugging but programing from JTAG.

Re: Jtag debugging issue with my custom build circuit

lpcxpresso_supp — Thu, 20 Dec 2018 06:59:21 GMT

See Design considerations for debug

Thanks and regards,

MCUXpresso Support

Re: Jtag debugging issue with my custom build circuit

rajeshjat56 — Fri, 21 Dec 2018 11:24:02 GMT

I have done circuit as debug circuit design consideration mention in above link, but still i am not able to debug and after debugging option selection, it goes into directly to exception vectors, infinite loop and code run,but not single step debug.

Re: Jtag debugging issue with my custom build circuit

xiangjun_rong — Tue, 25 Dec 2018 05:44:06 GMT

Hi, Rajesh,

As you said " it goes into directly to exception vectors, infinite loop and code run,but not single step debug.", it seems that you have downloaded the code to flash, the JTAG circuit is fine, but the code has issue so that it can not run. Pls try to check your code.

BR'

Xiangjun Rong