3 Replies Latest reply on Jun 21, 2018 10:24 PM by jobi

    Can't re-program my psoc5lp through JTAG

    knight_camper_1861791

      Hi All,

       

      After one successful programming with my jtag, I'm not able to re-program my psoc5lp with it.

       

      The error happen when doing step 3  Verify JTAG ID. In fact the APACC DATA Read never return the IDCODE now.

       

       

      I'm using an on board ftdi as jtag programmer.
      I'm playing SVF file generated with hex2svf tool in programmer folder.
      There is a CPLD in the chain then the PSOC chip.
      I'm able to read IDCODE using JTAG IDCODE state.

      My configuration is still JTAG 4-wire as factory setting

       

       

      Which register could I check with TC TAP to verify that Step 2 as been success fully executed ?

       

      Regards,

        • 1. Re: Can't re-program my psoc5lp through JTAG
          anks

          Which programming device are you using to program PSoC. You can refer to the PSoC5LP programming spec available at this link:

          http://www.cypress.com/file/119651/download

           

          Have you tried programming via PSoC Programmer(PP).If yes, please provide a screenshot of PP with error.

          • 2. Re: Can't re-program my psoc5lp through JTAG
            knight_camper_1861791

            Hi,

             


            As mention I use an on board FTDI (FT232H). So in fact PSoC Programmer is of no help here as it doesn't support FTDI based programmer.

             


            I read many time "Psoc5lp Device Programming Specification" and didn't find any clue about what's going on.

             


            I have access to TC TAP and DAP TAP JTAG operation (EXTEST,IDCODE)  so I have no issue with device configuration (4-wire jtag as in factory setting)

            The only difference with factory device is I think that my code is running in it (which toggle a pin).
            My issue is at step 3 of programmer guide where the read doesn't return IDCODE through debug port not jtag operation.
            So my guess is that read/write from debug port are not done properly at step 2 because the cortex is now running code

             

             

             

             

             

            The question is : What could I do with TC TAP to check that I can issue proper read and write with DAP TAP

             

             

             

            Regards

            • 3. Re: Can't re-program my psoc5lp through JTAG
              jobi

              Hi John,

               

              Since the programming is working first time, can you check if you had changed the 'Debug Select' in your PSoC Creator project. This can cause issue while reprogramming.

              Do you have Cypress programmer MiniProg3 ? You can give a try on reprogramming via MiniProg3 and eliminate similar issues.

              # What could I do with TC TAP to check that I can issue proper read and write with DAP TAP

              To use the DAP TAP, you need to put the TC TAP in Bypass.

               

              http://www.cypress.com/file/123561/download

              39.4.1 JTAG Interface Implementation


              Thanks

              Jobin