Dear Sirs,
I have a USB-kit board with PIC16C745. I am trying to get the data from the
5-channels of its A/D converter.
The vendors also provide a program in Visual Basic which uses a HIDComm
program and Active X components underneath.
I don't quite know what is in the firmware and I can only make guesses from
the VB program itself.
The Visual Basic program seems to write 1-byte channel number at data
location with Report ID 2.
Then after delay of 71 ms, it reads from the same location, which returns
the 1-byte data from the respective A/D channel number specified before.
I have tried your program test_libhid.c and I can successfully connect to
the device. But I have not been able to write to the specific location of
Report ID 2.
I have tried different Input Paths as specified in your example for the
Phidgets Quad ServoController, but I have not quite gotten it right.
I have tried different things but I seem to end up with report ID 0x00 and
report ID 0x01, and never with the desired report ID 0x02.
This is the part I have added to your program for write and read.
-----------
int const PATH_IN[2] = { 0xff000000,0xff000000};
int const PATH_OUT[2] = {0xff000000,0xff000000};
char const PACKET[1] = {0x02,0x04};
printf("From here ================================================ \n");
ret = hid_set_output_report(hid, PATH_IN, PATHLEN, PACKET, SEND_PACKET_LEN);
if (ret != HID_RET_SUCCESS)
{
fprintf(stderr, "hid_set_output_report failed with return code %d\n", ret);
}
unsigned char const RECV_PACKET_LEN = 2;
//char packet[RECV_PACKET_LEN];
char packet[2];
usleep(71000);
ret = hid_get_input_report(hid, PATH_OUT, PATHLEN, packet, RECV_PACKET_LEN);
if (ret != HID_RET_SUCCESS)
{
fprintf(stderr, "hid_get_input_report failed with return code %d\n", ret);
}
printf("To here ================================================ \n");
--------------------
Snippet from the output ....
TRACE: hid_prepare_report_descriptor(): initialising the report descriptor
for USB device 001/008[0]...
TRACE: hid_prepare_report_descriptor(): retrieving report descriptor for
USB device 001/008[0]...
NOTICE: hid_prepare_report_descriptor(): successfully initialised report
descriptor for USB device 001/008[0].
TRACE: hid_prepare_parser(): setting up the HID parser for USB device
001/008[0]...
TRACE: hid_reset_parser(): resetting the HID parser for USB device
001/008[0]...
TRACE: hid_prepare_parser(): dumping the raw report descriptor
TRACE: hid_prepare_parser(): 0x000: 0x06 0x00 0xff 0x09 0x00 0xa1 0x01 0x06
TRACE: hid_prepare_parser(): 0x008: 0x00 0xff 0x85 0x01 0x09 0x00 0x15 0x00
TRACE: hid_prepare_parser(): 0x010: 0x26 0xff 0x00 0x75 0x08 0x95 0x01 0x81
TRACE: hid_prepare_parser(): 0x018: 0x02 0x09 0x00 0x75 0x08 0x95 0x01 0x91
TRACE: hid_prepare_parser(): 0x020: 0x02 0x85 0x02 0x09 0x00 0x75 0x08 0x95
TRACE: hid_prepare_parser(): 0x028: 0x01 0x81 0x02 0x09 0x00 0x75 0x08 0x95
TRACE: hid_prepare_parser(): 0x030: 0x01 0x91 0x02 0x85 0x03 0x09 0x00 0x15
TRACE: hid_prepare_parser(): 0x038: 0x00 0x26 0xff 0x00 0x75 0x08 0x95 0x01
TRACE: hid_prepare_parser(): 0x040: 0x81 0x02 0x09 0x00 0x75 0x08 0x95 0x01
TRACE: hid_prepare_parser(): 0x048: 0x91 0x02 0xc0
TRACE: hid_prepare_parser(): parsing the HID tree of USB device
001/008[0]...
NOTICE: hid_prepare_parser(): successfully set up the HID parser for USB
device 001/008[0].
NOTICE: hid_force_open(): successfully opened USB device 001/008[0].
device identification of HIDInterface 001/008[0]:
dev_handle: 0x0804e0c0
device: 0x0804d048
location: 001/008
manufacturer: Innovative Experiment
product: U-Board USB1.0/1.1 Interface
serial number: V1.00
TRACE: hid_reset_parser(): resetting the HID parser for USB device
001/008[0]...
TRACE: hid_dump_tree(): iterating the parse tree for USB device
001/008[0]...
parse tree of HIDInterface 001/008[0]:
path: 0xff000000.0xff000000; type: 0x80
path: 0xff000000.0xff000000; type: 0x90
path: 0xff000000.0xff000000; type: 0x80
path: 0xff000000.0xff000000; type: 0x90
path: 0xff000000.0xff000000; type: 0x80
path: 0xff000000.0xff000000; type: 0x90
TRACE: hid_reset_parser(): resetting the HID parser for USB device
001/008[0]...
>From here ================================================
TRACE: hid_set_output_report(): looking up report ID...
TRACE: hid_prepare_parse_path(): preparing search path of depth 2 for parse
tree of USB device 001/008[0]...
TRACE: hid_prepare_parse_path(): search path prepared for parse tree of USB
device 001/008[0].
NOTICE: hid_find_object(): found requested item.
TRACE: hid_set_output_report(): sending report ID 0x01 (length: 2) to USB
device 001/008[0]...
NOTICE: hid_set_output_report(): successfully sent report to USB device
001/008[0].
TRACE: hid_get_input_report(): looking up report ID...
TRACE: hid_prepare_parse_path(): preparing search path of depth 2 for parse
tree of USB device 001/008[0]...
TRACE: hid_prepare_parse_path(): search path prepared for parse tree of USB
device 001/008[0].
NOTICE: hid_find_object(): found requested item.
TRACE: hid_get_input_report(): retrieving report ID 0x01 (length: 2) from
USB device 001/008[0]...
WARNING: hid_get_input_report(): failed to retrieve report from USB device
001/008[0]:error sending control message: Broken pipe.
hid_get_input_report failed with return code 20
To here ================================================
TRACE: hid_close(): closing USB device 001/008[0]...
TRACE: hid_close(): closing handle of USB device 001/008[0]...
NOTICE: hid_close(): successfully closed USB device 001/008[0].
---------------------------------------
Below is the output of lsusb -v
----------------
minSOSpy:/home/aadit/USB# lsusb -d 04d8:0fff -v
Bus 001 Device 008: ID 04d8:0fff Microchip Technology, Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x04d8 Microchip Technology, Inc.
idProduct 0x0fff
bcdDevice 1.00
iManufacturer 1 Innovative Experiment
iProduct 2 U-Board USB1.0/1.1 Interface
iSerial 3 V1.00
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 55
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 4 Config 1
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 400mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 4
bInterfaceClass 3 Human Interface Devices
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 5 Interface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.00
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 75
Report Descriptor: (length is 75)
Item(Global): Usage Page, data= [ 0x00 0xff ] 65280
(null)
Item(Local ): Usage, data= [ 0x00 ] 0
(null)
Item(Main ): Collection, data= [ 0x01 ] 1
Application
Item(Global): Usage Page, data= [ 0x00 0xff ] 65280
(null)
Item(Global): Report ID, data= [ 0x01 ] 1
Item(Local ): Usage, data= [ 0x00 ] 0
(null)
Item(Global): Logical Minimum, data= [ 0x00 ] 0
Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Global): Report Count, data= [ 0x01 ] 1
Item(Main ): Input, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile
Bitfield
Item(Local ): Usage, data= [ 0x00 ] 0
(null)
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Global): Report Count, data= [ 0x01 ] 1
Item(Main ): Output, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile
Bitfield
Item(Global): Report ID, data= [ 0x02 ] 2
Item(Local ): Usage, data= [ 0x00 ] 0
(null)
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Global): Report Count, data= [ 0x01 ] 1
Item(Main ): Input, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile
Bitfield
Item(Local ): Usage, data= [ 0x00 ] 0
(null)
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Global): Report Count, data= [ 0x01 ] 1
Item(Main ): Output, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile
Bitfield
Item(Global): Report ID, data= [ 0x03 ] 3
Item(Local ): Usage, data= [ 0x00 ] 0
(null)
Item(Global): Logical Minimum, data= [ 0x00 ] 0
Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Global): Report Count, data= [ 0x01 ] 1
Item(Main ): Input, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile
Bitfield
Item(Local ): Usage, data= [ 0x00 ] 0
(null)
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Global): Report Count, data= [ 0x01 ] 1
Item(Main ): Output, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile
Bitfield
Item(Main ): End Collection, data=none
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0002 1x 2 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 0x0002 1x 2 bytes
bInterval 10
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0002 1x 2 bytes
bInterval 10
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0002 1x 2 bytes
bInterval 10
Device Status: 0x0000
(Bus Powered)
---------------------
Can anyone tell me how to first write 1-byte into the data corresponding to
ReportID 0x02 and the read from the same location after a delay.
I apologize for sending a long message with so many details. I am sincerely
hoping that someone can point me the right direction.
Thanks and regards,
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