CANalyst II

The CANalyst II is an affordable, well-built piece of very Chinese equipment, exposing two CAN bus bus transceivers to a USB CAN adapter capable of 7k fps, and megabit CAN networks. There is very little English documentation. It appears as USB VendorID 04d8, ProductID 0053 (04d8:0053), the space of Microchip Technology, Inc..

Internals and Interface

The CANalyst II presents an OPEN5 screw terminal suitable for mating with a DE-9 or ODB-II DLC. Two CAN channels are supported.

The Chinese manufacturer's site claims that the device is "similar to a ZLG USBCAN-II+". What exactly is meant by "similar" here is not yet known. The USBCAN-II+ claims 14Kfps using both channels, which does match the claimed performance of the CANalyst II.

Port	Pin	Name	Function
1 | CAN_L | CAN_L signal wire terminal
2 | R- | Terminal resistance connector (connected to CAN_L internally)
3 | SHIELD | Shielded wire terminal (FG)
4 R+ Terminal resistance connector (connected to CAN_H internally) 5 CAN_H CAN_H signal wire terminal Linux The Linux kernel's preferred way to drive CAN adapters is via SocketCAN, which presents the device as a network interface. There does not appear to be a SocketCAN driver for the CANalyst II as of 2019-06-10. The mcba_usb driver, recompiled to use the CANalyst II's USB ID, definitely does *not* work. I'm planning to write a kernel driver; the GitHub project is CanalystII-SocketCAN. The python-can project contains a userspace driver, for which I've recently submitted patches (it wasn't working when my Canalyst II arrived). This allows a Python program to use the device, which is nice, I guess. If the usbserial kernel module is told to use the CANalyst II's USB IDs via sudo modprobe usbserial vendor=0x04d8 product=0x0053, it does appear to successfully bring up an SLCAN device, which can then be exposed as a network device using slcand or slcan_attach. The usbserial module will create 6(!) ttyUSB nodes for the CANalyst II. Only the first device seems to have any effect when used with SLCAN. To create a 125Kbps adapter, use something like: [schwarzgerat](0) $ sudo slcand -o -s4 -F ttyUSB0 [6] starting on TTY device /dev/ttyUSB0 [5] attached TTY /dev/ttyUSB0 to netdevice slcan0 The generated net device cannot have its bitrate set using ip, like native SocketCAN devices. Instead, the -s argument must be provided to slcand, using the following table: ASCII Command CAN Bitrate s0 10 Kbit/s s1 20 Kbit/s s2 50 Kbit/s s3 100 Kbit/s s4 125 Kbit/s s5 250 Kbit/s s6 500 Kbit/s s7 800 Kbit/s s8 1000 Kbit/s lsusb output usbutils 010, kernel 5.1.8, systemd 241. Bus 001 Device 029: ID 04d8:0053 Microchip Technology, Inc. Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 8 idVendor 0x04d8 Microchip Technology, Inc. idProduct 0x0053 bcdDevice 3.24 iManufacturer 1 Microchip Technology Inc. iProduct 3 Chuangxin Tech USBCAN/CANalyst-II iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 0x0066 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xc0 Self Powered MaxPower 500mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 12 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 255 Vendor Specific Subclass bInterfaceProtocol 255 Vendor Specific Protocol iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x01 EP 1 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x03 EP 3 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x83 EP 3 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x04 EP 4 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x84 EP 4 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x05 EP 5 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x85 EP 5 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x06 EP 6 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x86 EP 6 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 can't get device qualifier: Resource temporarily unavailable can't get debug descriptor: Resource temporarily unavailable Device Status: 0x0001 Self Powered