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Thread: Mini Wiggler and TC1796

  1. #1
    Gince
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    Mini Wiggler and TC1796

    Hello, can anyone share few ideas about Mini Wiggler V3 and TriCore TC1796? I'm trying to read it via JTAG, using following pads - TDI / TDO / TCK / TMS / VREF / TRST.
    I also connect PORST to PIN10 (reset) on miniwiggler. Also on JTAG pads there is BRKIN BRKOUT. I use DAS server - running UDAS server, DAS JDS miniwiggler V3.1 recognized.

    I power up my target board, MCU has stable 3.3V . I check with oscilloscope TMS / TDO / TDI - high level, TCK and TRST - low level. Before opening MemTool I check on DAS Basic Client
    if it sees my target - green light is blinking which indicates that Mini Wiggler is scanning for active devices, another green light is stable indicating that target device is powered.
    Any ideas why my target is not communicating with mini wiggler?

    On TC1796 I see HDRST, PORST, TSTRES. I use the one that is on JTAG pad - PORST.

  2. #2
    Advanced Advanced
    Infineon Employee
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    Hello,
    per default is the miniWiggler in DAP mode and expect a device which is able to communicate via DAP. TC1796 has only JTAG, therefore the CPU can't answer the DAP telegrams. You must switch the miniWiggler in JTAG mode. If you don't have the 20 pin JTAG connector on your board and can't connect 1:1 (this is was I expect) then you must set the miniWiggler to JTAG mode by connect pin 19 of the 20 pin JTAG connector to ground. Pin 17 of the connector is e.g. ground.
    I am not sure that the latest UDAS supports the TC1796 but you can check this by the described solution.
    The views expressed here are my personal opinions, have not been reviewed or authorized by Infineon and do not necessarily represent the views of Infineon.

  3. #3
    Beginner Beginner dedajozo is on a distinguished road
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    Hello,

    I'm tryng to connect to TC1796.I'm cant connect to target. I have errors.Picture in attachment.
    Connected TDI TDO TRST TCK TMS VREF AND GROUND.,
    I have two green leds lighting on my winggler v3.
    Can somebody please HELP.Click image for larger version

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    Last edited by dedajozo; Feb 15th, 2021 at 12:34 PM.

  4. #4
    Beginner Beginner dedajozo is on a distinguished road
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    I finaly manage to connect but I dont know how to read device.

  5. #5
    Beginner Beginner dedajozo is on a distinguished road
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    Hello,

    I figure it out how to read and write tc1796 with miniwinggler. It is working very very good.
    I have one more question. Is there a way to erase password protected sectors ( without knowing password ).?

    thx

  6. #6
    Beginner Beginner dedajozo is on a distinguished road
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    Nobody cant help with tc1796 erase???????

  7. #7
    Advanced Advanced cwunder will become famous soon enough
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    Quote Originally Posted by dedajozo View Post
    Is there a way to erase password protected sectors ( without knowing password ).?
    This would render the protection by a password useless wouldn't it, so I think you know the answer...

  8. #8
    Beginner Beginner dedajozo is on a distinguished road
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    Hello,

    yes I agree with you for password but there are some MCU with password protection that can be erased without knowing password ( NXP ).
    Also if somebody can help me with few things.
    When chip is empty I cant connect to chip. I have other tool for reading and writing TC1796 and with that other tool I can connect and write new chip but I cant do that with winggler.
    When TC1796 is programmed then I can connect with winggler and read it also I can erase it and again write new program but if I erese it and disconnect from it I cant connect to MCU again ( if empty ).
    In attachment please find picture of Jtag connection.
    Click image for larger version

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    thx

  9. #9
    Beginner Beginner dedajozo is on a distinguished road
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    Nobody didnt have this situation ?

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