Re: Parallel Port - Wiggler - Debugger
"nossnahojleinad" <[email protected]>
| Newsgroups | gmane.comp.hardware.motorola.microcontrollers |
|---|---|
| Message-ID | <[email protected]> |
I wonder if you could describe more exactly which pin numbers should be shifted up o 5v? Perhaps a cirquit diagram? I would really much like to try your solution! //Daniel --- In [email protected], "Hirschpek Ralf" <HirschpekRalf@J...> wrote: > > Hi everyone. > > I kept reading about the problems people are experiencing with > debugging/flashing via the parallel port using a Wiggler. > I'm not sure if it's the same problem I had but the errors look just the > same, I saw most of the errors myself and kept looking for software > settings concerning the parallel port on and off to no avail. > > I finally found the reason, at least it's what caused the troubles here. > Newer computers use only a 3.3V output on the parallel port pins which > seems to be just at the border of what our ICs (using a custom board > emulating the Wiggler with a CPLD) need as input. This led to a > situation where sometimes the debugger would work but more often just > wouldn't. > We solved our problem by using a logic level shifter (47HC4050) to latch > the signals from Parallel port to the Wiggler up to 5 V, specifically > the signals DSDI, DSCK and HRESET on pins 2,3 and 5 of the parallel > port. > Using this we have no troubles at all debugging and programming the > MPC565. > > As I said, I'm not sure if the problems you have are caused by this, but > it sure helped for us. > > --Ralf > > > > [Non-text portions of this message have been removed] ------------------------ Yahoo! Groups Sponsor --------------------~--> <font face=arial size=-1><a href="http://us.ard.yahoo.com/SIG=12h40k2ef/M=362329.6886308.7839368.1510227/D=groups/S=1706554205:TM/Y=YAHOO/EXP=1124721548/A=2894321/R=0/SIG=11dvsfulr/*http://youthnoise.com/page.php?page_id=1992 ">Fair play? Video games influencing politics. Click and talk back!</a>.</font> --------------------------------------------------------------------~-> ----------------------------------------------------------- To learn more about Freescale Microcontrollers, please visit http://www.freescale.com/mcu Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/MPC500/ <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/