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Mike, JTAG is IEEE 1149.1 for further reference. Emulator is opposed to simulator. Simulator simulates the processor, whereas the emulator enables the debugger to display the actual register values etc. Vasudev >Can someone explain exactly what an emulator does. I >am working with >the 5402 DSK and haven't availed myself of >this .feature out of >ignorance. I can't find a good explanation of it's >function. Also, >is the JTAG interface just another interface >specification, like RS- >232 and IEEE 1394? Any insight is, as always >appreciated. >Mike |
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JTAG
Started by ●July 27, 2002
Reply by ●October 6, 20042004-10-06
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Hi everybody
TMS320 have a port named JTAG.I want to know it's standard like a FPGA
JTAG or not.
and can i loaded my program in chip with JTAG cable??
Thanks
Amin Amin Rezaie K.N.Toosi university of technology Graduate student Electrical department Tel:0098-21-840-2669 0098-21-840-2173 Ext:113 0098-631-333-6312 TEHRAN-IRAN
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Reply by ●October 7, 20042004-10-07
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Morteza- > > Dear Amin, JTAG is a standard port and has a standard protocol that > > each vendor use it for programming their chips and hardware. TI gives > > you a capability with its Code Composer Studio to program your TI's > > DSP chips directly from its environment. I've never use my FPGA JTAG > > for programming my DSPs, but I'm sure about it that all of them use a > > standard protocols. I think the problem of using the other JTAGs is > > the knowledge that TI integrate with its JTAG driver. I don't know > > exactly the price of its JTAG emulator, but I remember that it's > > about 5000$ (4 to 5 million toman, It's a little expensive students > > usage). > > I wouldn't try plugging my FPGA JTAG into a TI DSP though. I don't think > all JTAG is created equal, although I am not familiar with the low-level > specs. AFAIK there is a basic protocol that each manufacturer extends to > add other features. Originally JTAG was meant to be used as a boundry > scan for automated testing, wasn't it? > > I can buy a $15 JTAG adapter for MSP430 development, but I dont' think > it will work with the TI DSP's. > > It would have been nice if you could daisy chain JTAG devices together > and use one JTAG pod (ie. MSP430 and TI DSP on the same JTAG bus) for > debugging. Brian is correct. You're asking for trouble if you put Xilinx or Altera on your DSP JTAG chain. CCS + JTAG is tricky enough without adding extra difficulties. For applications where a single header is needed (space constraint), or in-circuit-test/boundary scan (production situation), we use bus switches to separate JTAG chains. -Jeff |
Reply by ●October 7, 20042004-10-07
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Brian, Amin ... You should be able to put many JTAG devices on the same chain, as long as the debuggers or programmers can put the other devices in the by-pass mode. As far as JTAG pricing, you can buy JTAGjet emulator for TMS320 family form us (Signum) for $1,500 and use it with Code Composer Studio, or for $450 more you can get our C54xx debugger. Unlike the CCS, our debugger does not include the C compiler or assembler. But, the same JTAGjet emulator will also program your Flash, Xilinx or Altera parts that are on the board, even on the same JTAG chain : )) Jerry ----- Original Message ----- From: "Brian C. Lane" <> To: <> Sent: Thursday, October 07, 2004 9:29 AM Subject: Re: [c54x] JTAG > > Morteza Alizadeh wrote: > > > Dear Amin, JTAG is a standard port and has a standard protocol that > > each vendor use it for programming their chips and hardware. TI gives > > you a capability with its Code Composer Studio to program your TI's > > DSP chips directly from its environment. I've never use my FPGA JTAG > > for programming my DSPs, but I'm sure about it that all of them use a > > standard protocols. I think the problem of using the other JTAGs is > > the knowledge that TI integrate with its JTAG driver. I don't know > > exactly the price of its JTAG emulator, but I remember that it's > > about 5000$ (4 to 5 million toman, It's a little expensive students > > usage). > > I wouldn't try plugging my FPGA JTAG into a TI DSP though. I don't think > all JTAG is created equal, although I am not familiar with the low-level > specs. AFAIK there is a basic protocol that each manufacturer extends to > add other features. Originally JTAG was meant to be used as a boundry > scan for automated testing, wasn't it? > > I can buy a $15 JTAG adapter for MSP430 development, but I dont' think > it will work with the TI DSP's. > > It would have been nice if you could daisy chain JTAG devices together > and use one JTAG pod (ie. MSP430 and TI DSP on the same JTAG bus) for > debugging. > > Brian > > -- > ----------------- > Brian C. Lane (W7BCL) Programmer > www.shinemicro.com RF, DSP & Microcontroller Design > |
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Reply by ●October 7, 20042004-10-07
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Hi Rick- > Do you know this for a fact, have you tried it? I once researched it and > could find no one who had actually tried it first hand. A few told me that > you could do it if you had the information to put the extra chips in bypass > mode. But some told me to put the TI part first and others told me to put > it last. TI has app notes saying that it is supported, but no one at the > hotline could tell me anything about it. I tried it in 2002, did not work, have not tried it since. Any "problem" encountered is likely not really anything significant technically, it's tech support/political. Once you mention to TI person, or vice versa Xilinx person, that you've got the other guys' device on the chain, they immediately say "you'll have to separate that or we cannot help you". Also every month so we encounter a new PC that has some issues with CCS + JTAG. We always get these fixed, but it does take time. How to separate that from something on the board? One way is to keep the board simple. I have no interest to fix interesting JTAG bugs for TI/Xilinx FAEs (who are normally super helpful BTW). I just want to get done and move on. -Jeff Arius - Rick Collins wrote: > > At 01:57 PM 10/7/2004, you wrote: > > >Morteza- > > > > > > Dear Amin, JTAG is a standard port and has a standard protocol that > > > > each vendor use it for programming their chips and hardware. TI gives > > > > you a capability with its Code Composer Studio to program your TI's > > > > DSP chips directly from its environment. I've never use my FPGA JTAG > > > > for programming my DSPs, but I'm sure about it that all of them use a > > > > standard protocols. I think the problem of using the other JTAGs is > > > > the knowledge that TI integrate with its JTAG driver. I don't know > > > > exactly the price of its JTAG emulator, but I remember that it's > > > > about 5000$ (4 to 5 million toman, It's a little expensive students > > > > usage). > > > > > > I wouldn't try plugging my FPGA JTAG into a TI DSP though. I don't think > > > all JTAG is created equal, although I am not familiar with the low-level > > > specs. AFAIK there is a basic protocol that each manufacturer extends to > > > add other features. Originally JTAG was meant to be used as a boundry > > > scan for automated testing, wasn't it? > > > > > > I can buy a $15 JTAG adapter for MSP430 development, but I dont' think > > > it will work with the TI DSP's. > > > > > > It would have been nice if you could daisy chain JTAG devices together > > > and use one JTAG pod (ie. MSP430 and TI DSP on the same JTAG bus) for > > > debugging. > > > >Brian is correct. You're asking for trouble if you put Xilinx or Altera > >on your DSP > >JTAG chain. CCS + JTAG is tricky enough without adding extra difficulties. > > > >For applications where a single header is needed (space constraint), or > >in-circuit-test/boundary scan (production situation), we use bus switches > >to separate > >JTAG chains. > > Jeff, > > Do you know this for a fact, have you tried it? I once researched it and > could find no one who had actually tried it first hand. A few told me that > you could do it if you had the information to put the extra chips in bypass > mode. But some told me to put the TI part first and others told me to put > it last. TI has app notes saying that it is supported, but no one at the > hotline could tell me anything about it. > > Rick Collins > > Arius - A Signal Processing Solutions Company > Specializing in DSP and FPGA design http://www.arius.com > 4 King Ave 301-682-7772 Voice > Frederick, MD 21701-3110 301-682-7666 FAX |
