![]() If I try to use flash image_write I get the error, JTAG failureĮrror starting target flash write algorithmĮrror writing to flash at address 0x00000000 at offset 0x00000000 Previous state query failed, trying to reconnect Polling target nrf52.cpu failed, trying to reexamineĮxamination failed, GDB will be halted. Jtag status contains invalid mode value - communication failure Target halted due to debug-request, current mode: Thread But halt and program commannds always lead to errors like: JTAG failure -4 I can also run some basic openocd commands like dump_image e.t.c, which confirms that the setup is good. ![]() when connected I can read and write memory locations using mdw and mdb. ![]() I am able to connect to the chip using ST-LinkV2. The latest version includes all the latest pathes for the nrf52 chip, so no need for any additional changes as suggested in many older guides online. ![]() I have cloned and installed the latest openocd from. I have a custom nrf52 chip on a pcb with swd pins exposed. ![]()
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