Am Dienstag, den 22.04.2008, 08:31 -0400 schrieb Charles Lepple: > On Apr 21, 2008, at 8:21 PM, comicinker wrote: > > > > Am Freitag, den 28.03.2008, 21:01 -0400 schrieb Charles Lepple: > >> > >>> AND: How can I get the RECV_PACKET_LEN for this address > >> automatically? > >>> Or is it always the same length for each address (6)? The > >>> test_libhid.c > >>> doesn't tell where this value is detected. > >> > >> > >> It is in the interface descriptor. > > > > I'm still looking for this entry in the interface descriptor. Can > > somebody give me a hint where it is hidden? Is it really HIDData.Size? > > HIDData.Size is the size of one element, I think. (Sorry, I don't > have time to look through the code.) > > I was mistaken - I was thinking of wMaxPacketSize in the endpoint > descriptor (not the interface descriptor). I usually either just > hardcode that for a given device, or use control transfers instead. >
Do I understand it right that you use control transfers for each single data package? I think I won't tell you something new, but (depending on the chip architecture and vendor) this causes more operating time on the chip. I must refrain from using control transfers because my controller is not fast enough to deliver data and process all control transfer requests. So my device does not support the get_input_report request. I must use bulk or interrupt transfers. Oh I just see I should use the hid_interrupt_read function. Da*** However, I would like to determine the length of a specific report with a certain report ID, or the maximum length of the biggest report. Do I have to do it by myself by looping through the whole HIDParser? Bests, comicinker -- my public key is on hkp://pgp.mit.edu:11371 or ldap://keyserver.pgp.com
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