CodeWarrior for MCU中的主题 Re: PLL and Debugging Problem (aka PLLSEL=1 lost comunication)

PLL and Debugging Problem (aka PLLSEL=1 lost comunication)

SebaS — Wed, 07 Nov 2007 23:46:37 GMT

Hi, I've got this problem with the PLL and the Debugger...
I'm using Codewarriror v4.6 with MC9S12A128. I'm also using the USB BDM, and the debugging tool is HiWave.
I want to debug in a speed up to 40Mhz but I can't... I've got the same problem at 24Mhz... That's because, as Alban, the bus clock changes when PLLSEL=1... And he also said that "Depending on your BDM debugging tool, you can have an option to get automatic speed and synchronization if the bus changes."
How can I do that??

Now, I'm running at 16Mhz with external Clock... But if I can get higher speed that would be great... I'd like to push the uC to its maximun speed... Will the debugger tool / BDM have any problem with that?

THANKS!!

Re: PLL and Debugging Problem (aka PLLSEL=1 lost comunication)

CrasyCat — Thu, 08 Nov 2007 03:11:43 GMT

Hello

You have to go to "Multilink/CyclonePro" -> "Connect"

Then change to "Special Setup" tab and check the box "Set CLKSW bit in BDM control register (MC9S12only)".

That should be it

CrasyCat

Re: PLL and Debugging Problem (aka PLLSEL=1 lost comunication)

SebaS — Fri, 09 Nov 2007 20:34:22 GMT

Thank, you!!.... I'll try that and then let you know if that works....