RE: [lpc2100] Digest Number 62
2004-01-22 by Michael Johnson
Can someone explain what "Flash Programming via JTAG" means in this thread. Have Philips published the JTAG scan chain that accesses the Flash and has someone been courageous enough to use it? If the flash programming is done by communicating with a RAM resident loader program (which is how CrossWorks does it) I can't see that it makes much difference if the primary or secondary JTAG port is used. Regards Michael Message: 12 Date: Thu, 22 Jan 2004 10:13:10 -0000
Show quoted textHide quoted text
From: "leon_heller" <leon_heller@...> Subject: Re: Secondary JTAG problem. -> succesfull solution --- In lpc2100@yahoogroups.com, "Hugh O'Keeffe" <hugh.okeeffe@a...> wrote: > Ashling have seen problems with the secondary debug port as well. > Sometimes it works, sometimes it doesn't. We have been able to > debug/flash via the secondary port, however, not consistently and > reliably. From a recent batch of twenty of our EVBA7 boards we had five > secondary debug failures. We are confident we are doing the right thing > and that it is not a tool issue (we have reproduced the problem with ARM > MultiICE as well). > > > Hugh @ http://www.ashling.com/support/lpc2100/ > > > -----Original Message----- > From: Jim Beagley [mailto:jim5272@h...] > Sent: 21 January 2004 00:59 > To: lpc2100@yahoogroups.com > Subject: [lpc2100] Re: Secondary JTAG problem. -> succesfull solution > > > > Using the Primary for program, and then switching to secondary for > debug works fine. Attempting to program in Secondary mode fails at > every attempt, and only serves to corrupt the currently flashed > program, after which the primary port is required to aleviate the > problem. The following points out that that the secondary JTAG is *only* intended for debugging: http://www.semiconductors.philips.com/acrobat/applicationnotes/AN10255_1 .pdf Leon ________________________________________________________________________ ________________________________________________________________________ ------------------------------------------------------------------------ Yahoo! Groups Links To visit your group on the web, go to: http://groups.yahoo.com/group/lpc2100/ To unsubscribe from this group, send an email to: lpc2100-unsubscribe@yahoogroups.com Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ ------------------------------------------------------------------------