Tim- I'm sure you did this, but just to check: JTAG:TDI --> DSP0:TDI DSP0:TDO --> DSP1:TDI DSP1:TDO --> JTAG:TDO Jeff Brower DSP sw/hw engineer Signalogic On Wed, 24 Jan 2001, "Tim Shearer" <> wrote: >Hi there > >I've just built a development board using two 'C5402s, with the intention of using the XDS510PP JTAG pod for debugging. I designed it using the schematic on page B-13 of the C54x reference set, volume 1. But, there is a strange problem: > >Code Composer Studio seems to recognise and find both devices in the scan path (using parallel debug manager), but the Spectrum Digital test program (a bit like PORTIO.exe) seems to think the emulator isn't powered up...weird, because it can reset it with no problem. When loading my programs there are all sorts of memory errors; should I put these down to a separate problem and assume that because CCS is happy that the JTAG scan is working correctly and I can carry on programming without worrying? > >I am buffering all of the important signals through one device, a tri-state octal buffer/line driver. If anyone has successfully debugged a multiple processor board using the JTAG before, and can offer any advice, I would be very happy. Please help! > >Thanks, >Tim Shearer > >Digital Design Engineer >BBM Electronics Group, Trantec Systems >E-Mail: , Web: www.trantec.co.uk >Phone: +44 (0)20 8330 3388, Fax: +44 (0)20 8330 3222 |