Debug Option

[g_reshmi]

Hi NXP Team,

We are planning to develop a custom board based on LS1012A but we have space constraint. So we are planning to go with JTAG instead of CMSIS DAP for programming and debugging. Would that be fine?. 

Also kindly mention the additional changes that would be required if go with the above mentioned design.

Also will be compromising on any functionality if we avoid CMSIS DAP?

Can you please explain the use case of CMSIS_DAP(MK20DX128VFM5) Interface?

This CMSIS-DAP is used in all reference designs of LS1012A, so please clear this doubt and share interface diagram

[ufedor]

CMSIS-DAP is a low-speed debugger, accessible from the USB.

> we are planning to go with JTAG instead of CMSIS DAP for programming

> and debugging. Would that be fine?

Yes, it will be.

CMSIS-DAP is an optional module - i.e. JTAG can be used for the board bring-up solely.

> Also kindly mention the additional changes that would be required if go with the above mentioned design.

Just not implement the CMSIS-DAP module.

> Also will be compromising on any functionality if we avoid CMSIS DAP?

The whole LS1012A debug functionality is available through JTAG interface.

> Can you please explain the use case of CMSIS_DAP(MK20DX128VFM5) Interface?

Please refer for example to the QorIQ LS1012A Reference Design Board Manual, 2.18.1 CMSIS-DAP.