Hi Darren, The "set CLKSW bit in BDM control register (MC9S12 only)" is on. I see in the datasheet that the PLLSEL Bit also has to be set to switch to the PLL Clock. How do I do that with BDM? Nicholas --- In , "Darren" <djmoore@t...> wrote: > > > Hi Nicholas, > > I had a problem like that, two years back, for me is was > the CLKSW in BDM control register, see the reply from > Gilles Blanquin at Metrowerks below. > > Darren Moore > > -------------------------------- --- > Hi Darren. > > If your application changes (even only once) the bus speed via PLL: > -make sure a PLL Loop Filter is installed. > -check the "set CLKSW bit in BDM control register (MC9S12 only)" checkbox > in the "Communication Device Specification" dialog (menu: "ICD-12" then > "Connect..."). > > If you open a "Command" component, speed variation detections by the cable > should be reported there. > > Darren, could you indicate your Metrowerks CodeWarrior version: Typing > "ver" in the "Command" window gives directly a list of DLL versions. > > Thanks. > > Regards, > Gilles > --------------------------------

Hi Nicholas, I had a problem like that, two years back, for me is was the CLKSW in BDM control register, see the reply from Gilles Blanquin at Metrowerks below. Darren Moore ----------------------------------- Hi Darren. If your application changes (even only once) the bus speed via PLL: -make sure a PLL Loop Filter is installed. -check the "set CLKSW bit in BDM control register (MC9S12 only)" checkbox in the "Communication Device Specification" dialog (menu: "ICD-12" then "Connect..."). If you open a "Command" component, speed variation detections by the cable should be reported there. Darren, could you indicate your Metrowerks CodeWarrior version: Typing "ver" in the "Command" window gives directly a list of DLL versions. Thanks. Regards, Gilles ----------------------------------- > -----Original Message----- > From: pickleza [mailto:] > Sent: Tuesday, 8 March 2005 08:25 > To: > Subject: [68HC12] Problem with comms beween board and PC > > > Hi all, > > I am having a couple of problems getting my BDM interface working. > > I am using Metrowerks codeWarrior (2, I think) with a P&E BDM > Multilink Programmer on a 68HC12SD64, but am having some problems > with the connections. > > I get a BDM speed problem when connecting to the board (Frequency > Change Detected, Could Not Reconnect!). When I try and automatically > detect the frequency, the returned value changes every time. > > I get the same thing when I try to connect to my evaluation board > (MC9S12DP256EVB), but only some of the time. But there is another > problem with the evaluation board. I get a "No Programming Voltage" > error when trying to load a program into memory. Also, communication > is lost fairly often. > > I was hoping someone here may be of some help. > > Thanks > Nicholas > > Yahoo! Groups Links

Hi all, I am having a couple of problems getting my BDM interface working. I am using Metrowerks codeWarrior (2, I think) with a P&E BDM Multilink Programmer on a 68HC12SD64, but am having some problems with the connections. I get a BDM speed problem when connecting to the board (Frequency Change Detected, Could Not Reconnect!). When I try and automatically detect the frequency, the returned value changes every time. I get the same thing when I try to connect to my evaluation board (MC9S12DP256EVB), but only some of the time. But there is another problem with the evaluation board. I get a "No Programming Voltage" error when trying to load a program into memory. Also, communication is lost fairly often. I was hoping someone here may be of some help. Thanks Nicholas

Re: Problem with comms beween board and PC