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Discussion Groups | TMS320C6x | Problem with CCS and JTAG
Technical discussions about the TI C6000 DSPs (including the c62x, c64x and c67x DSPs).
Problem with CCS and JTAG - Rouxel, Jeanmarc - May 31 7:28:00 2001
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Hello everybody, we are developing an electronic card with a C6711 DSP. We have a problem to use Code Composer Studio with our system. However, we have implementing a JTAG connector on it (the same as on the DSK C6711) but Code Composer Studio doesn't want to communicate with it. Does somebody know which protocol is using Code Composer Studio to start the connection with the DSP by the JTAG ? Thanks. Jean-Marc ROUXEL |
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Re: Problem with CCS and JTAG - Jeff Brower - May 31 21:02:00 2001
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Jeanmarc- >we are developing an electronic card with a C6711 DSP. We have a problem to >use Code Composer Studio with our system. However, we have implementing a >JTAG connector on it (the same as on the DSK C6711) but Code Composer Studio >doesn't want to communicate with it. Does somebody know which protocol is >using Code Composer Studio to start the connection with the DSP by the JTAG Make sure: -C6711 reset line is not held low; JTAG cannot override reset line if your board has a grip on it -EMU0 and EMU1 lines are pulled-up and not buffered Jeff Brower DSP sw/hw engineer Signalogic |
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RE: Problem with CCS and JTAG - Jeff Brower - May 31 23:09:00 2001
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Jeanmarc- >thank you for your help. >The hardware engineer tells me : >on the DPS's output, there is a pull-up on each EMUx. Then the signals are >buffered... EM0 and EMU1 are bi-directional signals as far as CCS software is concerned. I looked quickly this morning at the DSK C6711 schematic. TI has used a SNCBT3257PW part, but I'm not sure if this is a buffer or a bi-directional bus switch. >Here the results of our tests : >We tested the signals (on our system and on the TI DSK-board C6711) with a >logical analyser. >The both TMS are identical. Our clock TCK is OK. >The only differences between the two boards are on the data (TDI and TDO). And the buffering issue; maybe you can ask the Texas Inst. Hotline () if CCS C6000 needs to see the EMUn signals as bi-directional. I know that for CCS C5000 this is definitely the case, having had to debug some hardware with this problem before. Jeff Brower DSP sw/hw engineer Signalogic >-----Message d'origine----- >De : Jeff Brower [mailto:] >Envoye : jeudi 31 mai 2001 16:03 >A : Jeanmar ROUXEL >Cc : >Objet : Re: [c6x] Problem with CCS and JTAG >Jeanmarc- > >>we are developing an electronic card with a C6711 DSP. We have a problem to >>use Code Composer Studio with our system. However, we have implementing a >>JTAG connector on it (the same as on the DSK C6711) but Code Composer >Studio >>doesn't want to communicate with it. Does somebody know which protocol is >>using Code Composer Studio to start the connection with the DSP by the JTAG > >Make sure: > > -C6711 reset line is not held low; JTAG cannot override > reset line if your board has a grip on it > > -EMU0 and EMU1 lines are pulled-up and not buffered > >Jeff Brower >DSP sw/hw engineer >Signalogic |
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