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signal11 / hidapi

A Simple library for communicating with USB and Bluetooth HID devices on Linux, Mac, and Windows.
http://www.signal11.us/oss/hidapi/
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Enumerate fix #438

Closed emily-5728 closed 5 years ago

emily-5728 commented 5 years ago

As USB host, am5728 evm board is connected with dlp module through USB HID V1.11. The test function uses hidtest. in hidapi-master open source Running the test function on the ti am5728 evm board failed to call hid_open (). Why did the call to hid_open () fail? Do you need to write dlp driver on 5728 single board? Usb1.0 and udev libraries are currently used. Are there any restrictions on the version of the library? Thank you! root@am57xx-evm:# ./hid_test no device unable to open device Segmentation fault root@am57xx-evm:#

The same test function can also correctly read dlp information in ubuntu, as follows: [root@tl hid_test]# ./hid_test Device Found type: 0e0f 0003 path: /dev/hidraw0 serial_number: Manufacturer: VMware Product: VMware Virtual USB Mouse Release: 103 Interface: 0

Device Found type: 0451 6401 path: /dev/hidraw1 serial_number: LCR2 Manufacturer: Texas Instruments Inc. Product: DLPC350 Release: 0 Interface: 0

Device Found type: 0451 6401 path: /dev/hidraw2 serial_number: LCR2 Manufacturer: Texas Instruments Inc. Product: DLPC350 Release: 0 Interface: 1

hid open dlp ok! Manufacturer String: Texas Instruments Inc. Product String: DLPC350 Serial Number String: (76) LCR2 Unable to read indexed string 1 Indexed String 1: Feature Report

waiting... waiting... waiting...

When the dlp module is connected to the am5728 through the USB interface, the following information is printed: root@am57xx-evm:/lib# [ 4071.898196] usb 1-1.2: new full-speed USB device number 9 using xhci-hcd [ 4072.005095] usb 1-1.2: New USB device found, idVendor=0451, idProduct=6401 [ 4072.012029] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 4072.019560] usb 1-1.2: Product: DLPC350 [ 4072.023426] usb 1-1.2: Manufacturer: Texas Instruments Inc. [ 4072.029165] usb 1-1.2: SerialNumber: LCR2 [ 4072.067017] hid-generic 0003:0451:6401.000D: hiddev0: USB HID v1.11 Device [Texas Instruments Inc. DLPC350] on usb-xhci-hcd.1.auto-1.2/input0 [ 4072.087137] input: Texas Instruments Inc. DLPC350 as /devices/platform/44000000.ocp/48880000.omap_dwc3_1/48890000.usb/xhci-hcd.1.auto/usb1/1-1/1-1.2/1-1.2:1.1/0003:0451:6401.000E/input/input9 [ 4072.158539] hid-generic 0003:0451:6401.000E: input: USB HID v1.11 Keyboard [Texas Instruments Inc. DLPC350] on usb-xhci-hcd.1.auto-1.2/input1

root@am57xx-evm:~# cat /proc/bus/input/devices I: Bus=0019 Vendor=0001 Product=0001 Version=0100 N: Name="gpio_keys" P: Phys=gpio-keys/input0 S: Sysfs=/devices/platform/gpio_keys/input/input1 U: Uniq= H: Handlers=kbd event0 B: PROP=0 B: EV=100003 B: KEY=16c0 0 0 0

I: Bus=0000 Vendor=0000 Product=0000 Version=0000 N: Name="palmas_pwron" P: Phys=palmas_pwron/input0 S: Sysfs=/devices/platform/44000000.ocp/48070000.i2c/i2c-0/0-0058/48070000.i2c:tps659038@58:tps659038_pwr_button/input/input0 U: Uniq= H: Handlers=kbd event1 B: PROP=0 B: EV=3 B: KEY=100000 0 0 0

I: Bus=0003 Vendor=0451 Product=6401 Version=0111 N: Name="Texas Instruments Inc. DLPC350" P: Phys=usb-xhci-hcd.1.auto-1.2/input1 S: Sysfs=/devices/platform/44000000.ocp/48880000.omap_dwc3_1/48890000.usb/xhci-hcd.1.auto/usb1/1-1/1-1.2/1-1.2:1.1/0003:0451:6401.0008/input/input6 U: Uniq=LCR2 H: Handlers=sysrq kbd mouse0 event2 B: PROP=0 B: EV=120017 B: KEY=1f0000 0 0 800000 0 e0b0ffdf 1cfffff ffffffff fffffffe B: REL=3 B: MSC=10 B: LED=1f

There is a usbhid module on am5728 single board, but see hid code, there is no dlp drive, do you need to add dlp driver? root@am57xx-evm:# root@am57xx-evm:# lsmod Module Size Used by ipv6 317996 26 hid_generic 941 0 usbhid 27328 0 gdbserverproxy 4477 0 cryptodev 36191 1 cmemk 29155 0 xhci_plat_hcd 4469 0 xhci_hcd 102093 1 xhci_plat_hcd usbcore 191588 3 xhci_plat_hcd,usbhid,xhci_hcd

Add the 99-hid rule file to/ etc/ udev/ rules. d, which is modified to:

HIDAPI/hidraw KERNEL=="hidraw*", ATTRS{busnum}=="1", ATTRS{idVendor}=="04d8", ATTRS{idProduct}=="003f", MODE="0666"

There are libraries of usb1.0 and udev on the am5728 veneer, as follows: root@am57xx-evm:/lib# ls -all

lrwxrwxrwx 1 root root 17 Dec 29 2015 libudev.so.0 -> libudev.so.0.13.1 -rwxr-xr-x 1 root root 45928 Dec 29 2015 libudev.so.0.13.1 lrwxrwxrwx 1 root root 16 Oct 8 00:00 libudev.so.1 -> libudev.so.1.6.4 -rwxr-xr-x 1 root root 108816 Oct 7 23:27 libudev.so.1.6.4 lrwxrwxrwx 1 root root 19 Dec 29 2015 libusb-0.1.so.4 -> libusb-0.1.so.4.4.4 -rwxr-xr-x 1 root root 14628 Dec 29 2015 libusb-0.1.so.4.4.4 lrwxrwxrwx 1 root root 19 Dec 29 2015 libusb-1.0.so.0 -> libusb-1.0.so.0.1.0 -rwxr-xr-x 1 root root 81652 Dec 29 2015 libusb-1.0.so.0.1.0

drwxr-xr-x 5 root root 4096 Dec 29 2015 udev root@am57xx-evm:/lib#