Objective Development Forums 2013-06-04T08:22:37+02:00 https://forums.obdev.at/app.php/feed/topic/8370 2013-06-04T08:22:37+02:00 2013-06-04T08:22:37+02:00 https://forums.obdev.at/viewtopic.php?t=8370&p=25359#p25359 <![CDATA[Re: "USB_SOF_HOOK" where examples or shared projects using t]]> bbarny Thanks!

Statistics: Posted by mega_mozg_13 — Tue Jun 04, 2013 8:22 am

]]> 2013-06-04T07:42:15+02:00 2013-06-04T07:42:15+02:00 https://forums.obdev.at/viewtopic.php?t=8370&p=25358#p25358 <![CDATA[Re: "USB_SOF_HOOK" where examples or shared projects using t]]> http://vusb.wikidot.com/project:lc-meter-usb
See the macro myUSB_SOF_HOOK in the usbconfig.h file in the "LC_meter_USB_Atmel" folder.

Statistics: Posted by bbarny — Tue Jun 04, 2013 7:42 am

]]> 2013-03-26T09:46:17+02:00 2013-03-26T09:46:17+02:00 https://forums.obdev.at/viewtopic.php?t=8370&p=25014#p25014 <![CDATA["USB_SOF_HOOK" where examples or shared projects using this?]]>
/* #ifdef __ASSEMBLER__
* macro myAssemblerMacro
* in YL, TCNT0
* sts timer0Snapshot, YL
* endm
* #endif
* #define USB_SOF_HOOK myAssemblerMacro
* This macro (if defined) is executed in the assembler module when a
* Start Of Frame condition is detected. It is recommended to define it to
* the name of an assembler macro which is defined here as well so that more
* than one assembler instruction can be used. The macro may use the register
* YL and modify SREG. If it lasts longer than a couple of cycles, USB messages
* immediately after an SOF pulse may be lost and must be retried by the host.
* What can you do with this hook? Since the SOF signal occurs exactly every
* 1 ms (unless the host is in sleep mode), you can use it to tune OSCCAL in
* designs running on the internal RC oscillator.
* Please note that Start Of Frame detection works only if D- is wired to the
* interrupt, not D+. THIS IS DIFFERENT THAN MOST EXAMPLES!

Statistics: Posted by mega_mozg_13 — Tue Mar 26, 2013 9:46 am

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