Tarmo Johannes
2011-02-25 17:08:38 UTC
Hello,
My task is to use a digital USB-controller ( Redlab 1024LS http://www.meilhaus.de/index.php?id=26&user_produkte%5BPR%5D=90&L=1&cHash=f866b18d24 ) to read state of simple switches and use the information for sound synthesis at the end.
After some search libhid looks very promising! Thank you for developing it!
I got it compiled (opensuse 11.3, 64bit), test_libhid recognised the device, opened it and viewed the dump tree correctly, but I cannot read any information from the device.
I tried with two functions : hid_get_input_report() and hid_interrupt_read(), no success
1) hid_get_input_report()
From the dump tree I assumed that the path_in should be:
<lines from dump_tree>:
path: 0xffa000a5.0xffa000a6; type: 0x80
.
.
path: 0xffa000a5.0xffa000a7; type: 0x90
As I understood, 0x00a6 is the input endpoint - to read data FROM device and 0x00a7 output endpoint (send data TO device)
So I formed
int const PATH_IN[2] = { 0xffa000a5, 0xffa000a6 };
Did I get it right? I did not understand how to make the PATH_IN from output of lsusb.
For any case the output of sudo lsusb -vvv is:
iInterface 5 EP1
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.10
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 44
Report Descriptor: (length is 44)
Item(Global): Usage Page, data= [ 0xa0 0xff ] 65440
(null)
Item(Local ): Usage, data= [ 0xa5 ] 165
(null)
Item(Main ): Collection, data= [ 0x01 ] 1
Application
Item(Local ): Usage, data= [ 0xa6 ] 166
(null)
Item(Global): Logical Minimum, data= [ 0x80 ] 128
Item(Global): Logical Maximum, data= [ 0x7f ] 127
Item(Global): Report Count, data= [ 0x08 ] 8
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Main ): Input, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Local ): Usage, data= [ 0xa7 ] 167
(null)
Item(Global): Logical Minimum, data= [ 0x80 ] 128
Item(Global): Logical Maximum, data= [ 0x7f ] 127
Item(Global): Report Count, data= [ 0x08 ] 8
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Main ): Output, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Local ): Usage, data= [ 0xa8 ] 168
(null)
Item(Global): Logical Minimum, data= [ 0x80 ] 128
Item(Global): Logical Maximum, data= [ 0x7f ] 127
Item(Global): Report Count, data= [ 0x68 ] 104
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Main ): Feature, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Main ): End Collection, data=none
The result to
unsigned char const RECV_PACKET_LEN = 44;
char packet[RECV_PACKET_LEN];
ret = hid_get_input_report(hid, PATH_IN, PATHLEN, packet, RECV_PACKET_LEN);
was:
WARNING: hid_get_input_report(): failed to retrieve report from USB device 005/002[0]:Connection timed out.
Did I guessed right that the RECV_PACKET_LEN should be the same as "Report Descriptor: (length is 44)" in lsusb output?
I tried also 8 and 1 for the RECV_PACKET_LEN but it made no difference.
2) hid_interrupt_read()
From lsusb I read about the interrupt endpoints:
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
Device Status: 0x0001
Does Endpoit OUT means get the data out FROM device or send them out TO deivce?
Anyway, I tried both:
ret = hid_interrupt_read(hid, 0x01, packet, 8, 2000);
and
ret = hid_interrupt_read(hid, 0x81, packet, 8, 2000);
and experimented also with different packet lengths (1 and 3 instead of 8) but the result was always
WARNING: hid_interrupt_read(): timeout on interrupt read from device 005/002[0]
FAILURE calling hid_interrupt_read
I would be most happy if you could help me further!
greetings,
tarmo
My task is to use a digital USB-controller ( Redlab 1024LS http://www.meilhaus.de/index.php?id=26&user_produkte%5BPR%5D=90&L=1&cHash=f866b18d24 ) to read state of simple switches and use the information for sound synthesis at the end.
After some search libhid looks very promising! Thank you for developing it!
I got it compiled (opensuse 11.3, 64bit), test_libhid recognised the device, opened it and viewed the dump tree correctly, but I cannot read any information from the device.
I tried with two functions : hid_get_input_report() and hid_interrupt_read(), no success
1) hid_get_input_report()
From the dump tree I assumed that the path_in should be:
<lines from dump_tree>:
path: 0xffa000a5.0xffa000a6; type: 0x80
.
.
path: 0xffa000a5.0xffa000a7; type: 0x90
As I understood, 0x00a6 is the input endpoint - to read data FROM device and 0x00a7 output endpoint (send data TO device)
So I formed
int const PATH_IN[2] = { 0xffa000a5, 0xffa000a6 };
Did I get it right? I did not understand how to make the PATH_IN from output of lsusb.
For any case the output of sudo lsusb -vvv is:
iInterface 5 EP1
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.10
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 44
Report Descriptor: (length is 44)
Item(Global): Usage Page, data= [ 0xa0 0xff ] 65440
(null)
Item(Local ): Usage, data= [ 0xa5 ] 165
(null)
Item(Main ): Collection, data= [ 0x01 ] 1
Application
Item(Local ): Usage, data= [ 0xa6 ] 166
(null)
Item(Global): Logical Minimum, data= [ 0x80 ] 128
Item(Global): Logical Maximum, data= [ 0x7f ] 127
Item(Global): Report Count, data= [ 0x08 ] 8
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Main ): Input, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Local ): Usage, data= [ 0xa7 ] 167
(null)
Item(Global): Logical Minimum, data= [ 0x80 ] 128
Item(Global): Logical Maximum, data= [ 0x7f ] 127
Item(Global): Report Count, data= [ 0x08 ] 8
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Main ): Output, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Local ): Usage, data= [ 0xa8 ] 168
(null)
Item(Global): Logical Minimum, data= [ 0x80 ] 128
Item(Global): Logical Maximum, data= [ 0x7f ] 127
Item(Global): Report Count, data= [ 0x68 ] 104
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Main ): Feature, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Main ): End Collection, data=none
The result to
unsigned char const RECV_PACKET_LEN = 44;
char packet[RECV_PACKET_LEN];
ret = hid_get_input_report(hid, PATH_IN, PATHLEN, packet, RECV_PACKET_LEN);
was:
WARNING: hid_get_input_report(): failed to retrieve report from USB device 005/002[0]:Connection timed out.
Did I guessed right that the RECV_PACKET_LEN should be the same as "Report Descriptor: (length is 44)" in lsusb output?
I tried also 8 and 1 for the RECV_PACKET_LEN but it made no difference.
2) hid_interrupt_read()
From lsusb I read about the interrupt endpoints:
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
Device Status: 0x0001
Does Endpoit OUT means get the data out FROM device or send them out TO deivce?
Anyway, I tried both:
ret = hid_interrupt_read(hid, 0x01, packet, 8, 2000);
and
ret = hid_interrupt_read(hid, 0x81, packet, 8, 2000);
and experimented also with different packet lengths (1 and 3 instead of 8) but the result was always
WARNING: hid_interrupt_read(): timeout on interrupt read from device 005/002[0]
FAILURE calling hid_interrupt_read
I would be most happy if you could help me further!
greetings,
tarmo