Hello! The problem is when i tryed to flash download or enter i get message "Device cannot enter bypass mode. Connection to target missing or incorrect". I cant find a reason why and when it happens. For about 3 mounth it works good. 1)Can i test my ULINK for capacity for work? 2)I find some connectors on printed circuit board of ULINK with RxD and TxD marks.What is destination of it?
Hi! I'm not big expert, but ULINK give me always a lot of problems, at least version uVision 2 (4.27). I get your same problem with the CPU external watchdog enabled. The only test I know for USB-JTAG is from "OCDS Driver Settings" (from "Options for Target" tab dialog), where you can read ULINK serial number, version and so on. When I loose the communication with JTAG I'm not able to read the serial number anymore. I have seen that version 5.05 have a completely new driver for ULINK, but I have not still tested it. Good luck !