Dobrica Pavlinušić's random unstructured stuff

CH9326: Revision 4

{image: IMG_20191019_175736-800px.jpg}

{file: CH9326DS1.PDF}

UART to USB 1.1 HID

^ chip on sop16 breakout

Connecting only VCC, GND USB- and USB+ to target and UART RX, TG and GND to USB serial works without any additional components.

.pre
[2022258.670458] usb 1-5.2.3: new full-speed USB device number 41 using ehci-pci
[2022258.780644] usb 1-5.2.3: New USB device found, idVendor=1a86, idProduct=e010, bcdDevice=34.00
[2022258.780657] usb 1-5.2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[2022258.780663] usb 1-5.2.3: Product: HID To Serial
[2022258.780669] usb 1-5.2.3: Manufacturer: WCH.CN 4
[2022258.780674] usb 1-5.2.3: SerialNumber: 12345678
[2022258.791635] hid-generic 0003:1A86:E010.000D: hiddev3,hidraw3: USB HID v1.00 Device [WCH.CN 4 HID To Serial] on usb-0000:00:1a.7-5.2.3/input0
.pre

I does not create normal /dev/input device under Linux, but sending chars over serial at 9600 8n1 does produce output at /dev/hidraw3 device

.pre
dpavlin@x200:~$ microcom -s 9600 -p /dev/ttyUSB0
.pre

^ lsusb

.pre
dpavlin@x200:~$ sudo lsusb -d 1A86:E010 -v

Bus 001 Device 041: ID 1a86:e010 QinHeng Electronics
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.00
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x1a86 QinHeng Electronics
idProduct 0xe010
bcdDevice 34.00
iManufacturer 1 WCH.CN 4
iProduct 2 HID To Serial
iSerial 3 12345678
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0029
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 4 (error)
bmAttributes 0x80
(Bus Powered)
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.00
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 37
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 1
can't get debug descriptor: Resource temporarily unavailable
Device Status: 0x0000
(Bus Powered)
.pre