Peter C. Wallace wrote: > On Thu, 8 May 2008, Anders Wallin wrote: > >> Date: Thu, 08 May 2008 15:57:49 +0300 >> From: Anders Wallin <[EMAIL PROTECTED]> >> Reply-To: "Enhanced Machine Controller (EMC)" >> <emc-users@lists.sourceforge.net> >> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> >> Subject: [Emc-users] having to reload fpga config on m5i20 on every bootup? >> >> Hi all, >> >> I'm using an m5i20 card with the hostmot5_4eh.bit configuration that >> allows PWM at 50 kHz. >> >> I have to reload the fpga configuration after each bootup of the machine >> with 'sudo m5i20cfg hostmot5_4eh.bit 0'
From a cold boot (power cycle), you will always have to reload - the configuration is stored in RAM, and goes away when the power goes away. I'm not sure if a warm boot (reset button) will erase it. >> In my HAL files I use the m5i20 driver without loading the default >> (wrong, in my case) fpga config: >> loadrt hal_m5i20 loadFpga=0 dacRate=16666 >> >> (the driver assumes the PWM clock is 33MHz, but with the modified config >> it's actually 100MHz, so I config it to 16.7 kHz and get 3*16.7kHz=50kHz >> PWM output) >> >> should I have to do this m5i20cfg command every time I run emc or should >> the fpga config stick once it's loaded? >> >> >> Anders > > You need only load the FPGA once, as long as you always have the LoadFPGA > flag > set to 0. If LoadFPGA is set to 0 the Device_LoadFpga function in the > hal_m5i20 > module is never called, This is the only function in hal_m5i20 that mucks > about with the PCI bridges GPIO bits responsible for re-programming the > FPGA... > > Peter: Does a warm boot reset the FPGA and/or the bridge chip? Regards, John Kasunich ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
