Thanks Alan,
that was very helpful.
/Bernd
Alan Stern wrote:
On Tue, 14 Jul 2015, Bernd Porr wrote:
I've got a question regarding ISO transfer. If the firmware is not
providing data is the ISO urb returning zero packet length and if yes
how can I check that in the driver? I'm working on a
I've got a question regarding ISO transfer. If the firmware is not
providing data is the ISO urb returning zero packet length and if yes
how can I check that in the driver? I'm working on a solution for my
USBDUX driver where the ADC for example takes 800us to measure all data
so that a couple
On Tue, 14 Jul 2015, Bernd Porr wrote:
I've got a question regarding ISO transfer. If the firmware is not
providing data is the ISO urb returning zero packet length and if yes
how can I check that in the driver? I'm working on a solution for my
USBDUX driver where the ADC for example takes
On Fri, 3 Jul 2015, Peter Chen wrote:
Thanks, I think I understand it now.
Maybe only the case A like below commit needs zero-length packet.
usb: chipidea: udc: Disable auto ZLP generation on ep0
953c66469735aed8d2ada639a72b150f01dae605
Case A (as described in that commit) definitely
On Wed, Jul 01, 2015 at 10:16:12AM -0400, Alan Stern wrote:
On Wed, 1 Jul 2015, Peter Chen wrote:
On Tue, Jun 30, 2015 at 12:03:34PM -0400, Alan Stern wrote:
On Tue, 30 Jun 2015, Peter Chen wrote:
Hi Alan,
When reading the code (at qh_urb_transaction) about zero-length
On Wed, Jul 1, 2015 at 11:00 PM, Peter Chen peter.c...@freescale.com wrote:
If one is multiple?
The wLength at setup packet is 64 bytes, Maximum Packet Length at
dQH is 64 bytes, and the Total Bytes at dTD is 64 bytes too, does device
must prepare a zero-length packet?
I would like to double
On Thu, 2 Jul 2015, Peter Chen wrote:
If a control-IN transfer has a data stage that is shorter than wLength
and is a multiple of the ep0 maxpacket value, then the peripheral must
send a zero-length packet to indicate the end of the data stage.
Thus, the UDC driver must prepare a
On Thu, Jul 02, 2015 at 10:46:36AM -0400, Alan Stern wrote:
On Thu, 2 Jul 2015, Peter Chen wrote:
If a control-IN transfer has a data stage that is shorter than wLength
and is a multiple of the ep0 maxpacket value, then the peripheral must
send a zero-length packet to indicate the end
On Wed, 1 Jul 2015, Peter Chen wrote:
On Tue, Jun 30, 2015 at 12:03:34PM -0400, Alan Stern wrote:
On Tue, 30 Jun 2015, Peter Chen wrote:
Hi Alan,
When reading the code (at qh_urb_transaction) about zero-length packet
for EHCI, would you please help me on below questions:
Hi Alan,
When reading the code (at qh_urb_transaction) about zero-length packet
for EHCI, would you please help me on below questions:
- I have not found the zero-length qtd prepared for control read (eg,
the transfer size is multiple of wMaxPacketSize), Am I missing
something?
- Why the IN
On Tue, Jun 30, 2015 at 12:03:34PM -0400, Alan Stern wrote:
On Tue, 30 Jun 2015, Peter Chen wrote:
Hi Alan,
When reading the code (at qh_urb_transaction) about zero-length packet
for EHCI, would you please help me on below questions:
- I have not found the zero-length qtd prepared
On Tue, 30 Jun 2015, Peter Chen wrote:
Hi Alan,
When reading the code (at qh_urb_transaction) about zero-length packet
for EHCI, would you please help me on below questions:
- I have not found the zero-length qtd prepared for control read (eg,
the transfer size is multiple of
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