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johnfu
Visitor II
June 23, 2007
Question

Problem using ST-uPSD uLINK to debug in uVision3

  • June 23, 2007
  • 1 reply
  • 626 views
Posted on June 23, 2007 at 02:00

Problem using ST-uPSD uLINK to debug in uVision3

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    1 reply

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    johnfuAuthor
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 11:50

    Hi, I have just bought ST uPSD33xx series development kit (DK3300-ELCD, uPSD3334D). In the kit, a keil uLINK USB-JTAG is included. When I use uLINK to debug , uVision shows the following error message :

    ''JTAG Communication Failure''

    ''JTAG Communication Failure''

    ''JTAG Communication Failure''

    ''JTAG Communication Failure''

    ''JTAG Communication Failure''

    ''*** error 122: AGDI: memory read failed (D:0x80)''

    I can program the development kit using uLINK (Must disconnect the uLINK after programming, otherwise, it will not work), but cannot enter debug mode.

    I observe that pin 8 in the J-TAG port, which is connected to the reset pin of the MCU, is always low. While I use another JTAG device (Raisonance RLINK-ST USB-JTAG Adapter, which work perfectly), the pin 8 is low only during program, when idle or debugging, pin 8 is high.

    So, may be this the reason why uLINK doesn't work? Does it mean that Keil uLINK is broken?

    Thank.

    Best regard.

    John

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