Lpc2000

In the JTAG2 enable code I removed any startup code and added a delay
after assigned PINSEL1.  Still no luck.  Ugh, I hate spending all this
time on something that has worked before.  What am I missing............


Rich


--- In lpc2000@yahoogroups.com, Tom Walsh <tom@...> wrote:
>
> Richard wrote:
> 
> >I am having problems to the 2106 using the secondary JTAG, this is on
> >a prototype board.  Keil gives me the message:
> >
> > "Couldn't stop the ARM device.  Check the JTAG cable"
> >
> >The particulars:
> >
> >Keil IDE
> >DBGSEL is pulled low.
> >RTCK is pulled low
> >TRST, TDI, TDO, and TMS are pulled high
> >TCK is pulled low
> >14.7456 MHz Xtal
> >
> >I have used this setup in two ther designs without problems.  I
> >configure PINSEL2 to 0x55400000 as I always have.
> >
> >I have slow the JTAG as slow as it will go.  I can see all the signals
> >active on the logic analyser.  
> >
> >  
> >
> That sounds odd, there should be a DELAY setting someplace.  At least I 
> have this with the Abatron BDI2000, I can assert a RESET for a specific 
> interval, then a DELAY before it attempts to connect.
> 
> Sounds like that Keil is attempting to connect the JTAG immediately 
> after releasing the RESET.  As you know, with the secondary JTAG of the 
> LPC2106, you have to enable the secondary JTAG, then (I do this) put a 
> short delay loop in before the actual startup code to allow the BDI2000 
> to "catch" the processor before it runs the actual code.
> 
> TomW
> 
> -- 
> Tom Walsh - WN3L - Embedded Systems Consultant
> http://openhardware.net, http://cyberiansoftware.com
> "Windows? No thanks, I have work to do..."
> ----------------------------------------------------
>