RE: PORESET and SWT
Dobbin Allan-r11834 <[email protected]>
| Newsgroups | gmane.comp.hardware.motorola.microcontrollers |
|---|---|
| Message-ID | <45E41B46B1F8D81183E4000F20D7C40B0B568564@az33exm40-bu.am.freescale.net> |
On the Axiom board, it sounds liekt he POR time is not long enough, but I would have suspected that h/w to be correct. Your other h/w is a bit of a mystery i.e. why the PIT wouldn't work but other clocks would. Is it possible the wrong clock source has been selected for the timer? As far as guessing your sysclk speed - look at the CLKOUT signal. Allan -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Peter Allen \(Yahoo\) Sent: Monday, July 25, 2005 8:49 PM To: [email protected] Subject: [MPC500] PORESET and SWT I just got some hardware back and can get code into flash. The device comes out of reset but doesn't boot withou BDM intervention (ie. I attach to code already on target and then use the reset command and the code starts running as expected). I have also noticed that the PIT doesn't always start working but serial coms and TPU run ok and the SWT doesn't ever time out to cause a reset. Things I know (I think): device is operating at desired 56MHz since: baud rate is tied to this. TPU functions are producing the correct timing patterns. I noticed that on my Axiom eval board when i used the POReset the code would not boot until the watchdog timer ran out and and then everything would work OK. I I used the Hreset or Sreset the system would bot straight away (power is applied to the board at all times). If anyone has some wisdom on this problem I would greatly appreciate the help Peter Allen Haltech Design Engineer www.haltech.com <http://www.haltech.com/> ph: 95252400 fax: 95252991 [Non-text portions of this message have been removed] ----------------------------------------------------------- To learn more about Freescale Microcontrollers, please visit http://www.freescale.com/mcu Yahoo! Groups Links ----------------------------------------------------------- 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/