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  • [SOLVED] VTref always 0.000V - Sipeed Longan Nano

    apfel - - J-Link/Flasher related

    Post

    OK, i found my mistake. segger.com/fileadmin/images/pr…scription/181129_JTAG.svg I was looking at the picture and i was using it to connect my cables to the JTAG cable. But this picture shows the pinout of J-Link device and not the cable.... everything works now. Thanks anyway.

  • [SOLVED] VTref always 0.000V - Sipeed Longan Nano

    apfel - - J-Link/Flasher related

    Post

    Hi, i bought a J-Link EDU to do some lowlevel debugging and software development on RISC-V. Source Code (10 lines)I have a Sipeed Longan Nano. I followed this wiki article to connect my J-Link: wiki.segger.com/SiPeed_Longan_Nano segger.com/products/debug-prob…gy/interface-description/ I connected the J-Link via USB with my PC. I connected the Sipeed via UsB with my PC. Then i connected the JTAG cable with the J-Link. Starting J-Link Commander shows VTref=0.000 and the 'connect' procedure fails -…