I read from user manual that ISP command handler will respond "OK" after finished transferring the binary file. But when I use the command, there is no OK respond even though the code works after the execution.
I would like to apologize for the delay. We are experiencing a high volume of questions these days. I really appreciate your patience.
Regarding your observation, do you have by any chance a screenshot from the log where you are flashing your LPC on ISP mode, please? Also I would like to know if you are using an EVK from NXP or is your custom board?
I will stay tuned to your answer, so please let me know if you have more questions.