usb modem "Can't setup transfer"

[Alfred Perlstein]

Hans,

Thank you, that allows it to attach and the device nodes appear in /dev/

However I then can not seem to send any AT commands and get a response 
via either cu -l /dev/ttyU1 or cu -l /dev/ttyU1.

Any further steps?  Is there a way to virtually share this hardware with 
you?

-Alfred

On 11/12/15 12:31 AM, Hans Petter Selasky wrote:
> On 11/11/15 20:51, Alfred Perlstein wrote:
>>
>
> Hi,
>
> The device is very special in that it uses an interrupt type of 
> endpoint for receiving the data.
>
>>
>>       Endpoint 1
>>          bLength = 0x0007
>>          bDescriptorType = 0x0005
>>          bEndpointAddress = 0x0084  <IN>
>>          bmAttributes = 0x0003  <INTERRUPT>
>>          wMaxPacketSize = 0x003f
>>          bInterval = 0x0002
>>          bRefresh = 0x0000
>>          bSynchAddress = 0x0000
>>
>
> In umodem.c you might want to change the USB matching filter to accept 
> interrupt endpoints:
>
>>         [UMODEM_BULK_RD] = {
>>                 .type = UE_BULK, // change this to UE_BULK_INTR
>>                 .endpoint = UE_ADDR_ANY,
>>                 .direction = UE_DIR_RX,
>
> This change will break other modem drivers, but at least it will give 
> some clues if it works or not.
>
> --HPS
>