Objective Development Forums 2008-05-04T22:23:38+02:00 https://forums.obdev.at/app.php/feed/topic/1422 2008-05-04T22:23:38+02:00 2008-05-04T22:23:38+02:00 https://forums.obdev.at/viewtopic.php?t=1422&p=5240#p5240 <![CDATA[Atmega128 restarts]]>
usbInit() can't crash, it just initializes some registers. Maybe sei() causes the crash, an interrupt may be enabled which has no vector set.

How do you know it restarts? And how do you know it restarts when you call usbInit()?

Statistics: Posted by christian — Sun May 04, 2008 10:23 pm

]]> 2008-05-03T18:37:44+02:00 2008-05-03T18:37:44+02:00 https://forums.obdev.at/viewtopic.php?t=1422&p=5234#p5234 <![CDATA[Atmega128 restarts]]>
I have a problem with Atmega128 and AVR-USB. When I call usbInit() my AVR restarts.

Schematic: www.exsports.info/sch.JPG
UsbConfig: www.exsports.info/usbconfig.h
Code:

Code: 

int main(void)
{
   PORTD = 0;
   DDRD = 0b11111000;

   usbInit();

   sei();
   for(;;){
      usbPoll();
   }
   return 0;
}


In my board R17 and R18 (from schematic) are 100Ohm instead of 68Ohm. Fuse bits configuration is in my opinion OK (0xEF 0x99 0xFd). I'm using 12Mhz crystal.

Sorry for my English and thanks for help.

Statistics: Posted by sir — Sat May 03, 2008 6:37 pm

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