Objective Development Forums 2006-12-11T12:15:51+02:00 https://forums.obdev.at/app.php/feed/topic/117 2006-12-11T12:15:51+02:00 2006-12-11T12:15:51+02:00 https://forums.obdev.at/viewtopic.php?t=117&p=364#p364 <![CDATA[How to send on Interrupt transfer more than 8 bytes ?]]>
Yes, this is rather dirty coding, but that's what I meant with "The driver is not really prepared to handle interrupt-IN transfers of more than 7 bytes".

Statistics: Posted by christian — Mon Dec 11, 2006 12:15 pm

]]> 2006-12-09T14:18:05+02:00 2006-12-09T14:18:05+02:00 https://forums.obdev.at/viewtopic.php?t=117&p=350#p350 <![CDATA[How to send on Interrupt transfer more than 8 bytes ?]]>

Code: 

void SendData(void)
{
    while (!usbInterruptIsReady()) 
   {
      wdReset(); 
      usbPoll();
   }
    usbSetInterrupt(BuildReport(0), 8);

    while (!usbInterruptIsReady()) 
   {
      wdReset(); 
      usbPoll();
   }
    usbSetInterrupt(BuildReport(8), 8);
    while (!usbInterruptIsReady()) 
   {
      wdReset(); 
      usbPoll();
   }
    usbSetInterrupt(&usbNullRep[0], 0);
}
where: 
static uchar usbNullRep[1]; // = {0}
SendData() is called from void main() in the main while(1) {...} loop.


Is that it what you was thinking about ?
(I know it's rather dirty approach to the problem... :) )

Statistics: Posted by Guest — Sat Dec 09, 2006 2:18 pm

]]> 2006-12-09T12:26:44+02:00 2006-12-09T12:26:44+02:00 https://forums.obdev.at/viewtopic.php?t=117&p=349#p349 <![CDATA[How to send on Interrupt transfer more than 8 bytes ?]]> That's the information I was looking for.

Greetz.

Statistics: Posted by Guest — Sat Dec 09, 2006 12:26 pm

]]> 2006-12-07T11:50:59+02:00 2006-12-07T11:50:59+02:00 https://forums.obdev.at/viewtopic.php?t=117&p=330#p330 <![CDATA[How to send on Interrupt transfer more than 8 bytes ?]]>
You should be able to simulate a 16 byte interrupt transfer with the following procedure:
  • Pass the first 8 bytes with usbSetInterrupt().
  • Wait until they are transferred with usbInterruptIsReady().
  • Pass the next 8 bytes with usbSetInterrupt().
  • Wait until the transaction is complete with usbInterruptIsReady().
  • Call usbSetInterrupt() with 0 bytes to indicate the end of transfer.

If your payload is only 15 bytes, you save the last 0 byte transaction. The end of transfer is indicated by a transaction with less than 8 bytes.

Statistics: Posted by christian — Thu Dec 07, 2006 11:50 am

]]> 2006-12-06T23:14:41+02:00 2006-12-06T23:14:41+02:00 https://forums.obdev.at/viewtopic.php?t=117&p=324#p324 <![CDATA[How to send on Interrupt transfer more than 8 bytes ?]]> Statistics: Posted by Guest — Wed Dec 06, 2006 11:14 pm

]]> 2006-12-06T20:48:47+02:00 2006-12-06T20:48:47+02:00 https://forums.obdev.at/viewtopic.php?t=117&p=322#p322 <![CDATA[How to send on Interrupt transfer more than 8 bytes ?]]>
First of all - congratulations for great project (avr-usb)!
I've got one question :
How to send on interrupt transfer (IN) more then 8 bytes ?
Function usbSetInterrupt accepts only 8 bytes, but I need to send 16 bytes simultaneously on one IN endpoint poll.
I need this, because of my HID descriptor - full datagram fits 16 bytes.

It is possible to send 0 bytes at the interrupt and call somehow usbFunctionRead ?

I've migrated my project from PIC usb capable devices, where it was possible to set 16 byte payload for IN-interrupt-endpoint (low-speed device), and the device-usb-driver sends that buffer succesfully on each interrupt.

Statistics: Posted by Guest — Wed Dec 06, 2006 8:48 pm

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