• 中文版本

WeActStudio.USB2CANFDV1

STM32G0B1CBT6

64Mhz Max,128KB RAM,128KB ROM

CANFD/CAN2.0

1500V isolation, 5Mbps Max, support cangaroo or secondary development. Transceiver part number: SIT1051A&sitcores

Connector

3.81mm 1x3P WJ15EDGK-3.81-3P

SLCAN Protocol Description

Please upgrade to the latest firmware version to support more baud rates

Using the virtual serial, the command is as follows:

• O[CR] - Opens the CAN channel
• C[CR] - Close the CAN channel
• S0[CR] - Set the nominal bit rate to 10k
• S1[CR] - Set the nominal bit rate to 20k
• S2[CR] - Set the nominal bit rate to 50k
• S3[CR] - Set the nominal bit rate to 100k
• S4[CR] - Set the nominal bit rate to 125k (default)
• S5[CR] - Set the nominal bit rate to 250k
• S6[CR] - Set the nominal bit rate to 500k
• S7[CR] - Set the nominal bit rate to 800k
• S8[CR] - Set the nominal bit rate to 1M
• S9[CR] - Set the nominal bit rate to 83.3k
• SA[CR] - Set the nominal bit rate to 75k
• SB[CR] - Set the nominal bit rate to 62.5k
• SC[CR] - Set the nominal bit rate to 33.3k
• SD[CR] - Set the nominal bit rate to 5k
• Sxxyy[CR] - Custom nominal bit rate (60/2=30Mhz CAN clock) [xx=seg1(hex,0x02~0xff), yy=seg2(hex,0x02~0x80)]
• Sddxxyy[CR] - Custom nominal bit rate ([60/div]Mhz CAN clock) [dd=div(hex,0x01~0xff), xx=seg1(hex,0x02~0xff), yy=seg2(hex,0x02~0x80)]
• Y1[CR] - Set the CANFD data segment bit rate to 1M
• Y2[CR] - Set CANFD data segment bit rate to 2M (default)
• Y3[CR] - Set the CANFD data segment bit rate to 3M
• Y4[CR] - Set the CANFD data segment bit rate to 4M
• Y5[CR] - Set the CANFD data segment bit rate to 5M
• Yxxyy[CR] - Custom CANFD data segment bit rate (60Mhz CAN clock) [xx=seg1(hex,0x01~0x20), yy=seg2(hex,0x01~0x10)]
• Yddxxyy[CR] - Custom CANFD data segment bit rate ([60/div]Mhz CAN clock) [dd=div(hex,0x01~0x20), xx=seg1(hex,0x01~0x20), yy=seg2(hex,0x01~0x10)]
• M0[CR] - Set to normal mode (default)
• M1[CR] - Set to silent mode
• A0[CR] - Turn off automatic retransmission (default)
• A1[CR] - Enable automatic retransmission (not recommended, may crash)
• tIIILDD...[CR] - Transfer data frame (standard ID) [ID, length, data]
• TIIIIIIIILDD...[CR] - Transfer data frame (extended ID) [ID, length, data]
• rIIIL[CR] - Transfer remote frame (standard ID) [ID, length]
• RIIIIIIIIL[CR] - Transfer remote frame (extended ID) [ID, length]
• dIIILDD...[CR] - Transmit CANFD standard frames (without BRS enabled) [ID, length, data]
• DIIIIIIIILDD...[CR] - Transmit CANFD extended frames (without BRS enabled) [ID, length, data]
• bIIILDD...[CR] - Transmit CANFD standard frames (BRS enabled) [ID, length, data]
• BIIIIIIIILDD...[CR] - Transmit CANFD extended frames (BRS enable) [ID, length, data]
• V[CR] - Reads the firmware version
• E[CR] - Read the failure state
• X[CR] - Enter firmware upgrade mode

[CR] : 0x0D (hex), \r (ascii)

A status statement is returned after the command is sent

• [CR]: transmission successful
• 0x07: transmission failed

Note
The CANFD message length is as follows (in hex):

• 0-8 : Same as standard CAN
• 9 : length = 12
• A : length = 16
• B : length = 20
• C : length = 24
• D : length = 32
• E : length = 48
• F : length = 64

cangaroo is located in Tools/cangaroo
The documentation for calculating custom Bitrate Settings is located in Doc/CAN Bitrate Calculate_波特率计算.xlsx

Pin Description

pin	definition	specification
PA0	LED_RXD	Receive indicator, flashing when there is data
PA1	LED_TXD	Send indicator light, flashing when there is data
PA2	LED_READY	Status indicator, flashing 0.5S when the CAN port is opened and 1S when is in upgrade mode
PB9	FDCAN1_TX	FDCAN1 tx
PB8	FDCAN1_RX	FDCAN1 rx
PA12	USB_DP	USB 2.0 12Mbps
PA11	USB_DM	USB 2.0 12Mbps
PF0	OSC_IN	16Mhz XTAL
PF1	OSC_OUT	16Mhz XTAL

Partitioning Notes

Start address	Partition name	Size	Description
0x08000000	bootloader	26 kbyte	bootloader, character watermark: USB2CANV1
0x08006800	app	50 kbyte	application
0x08013000	download	50 kbyte	download partition

How to compile your own firmware

See Example\Build_You_Own_firmware

How to force firmware upgrade mode

When the firmware is brushed dead, short DIO and GND to power on, the blue light is on and then released, and the red light flashes slowly, indicating that is currently in upgrade mode.

How to upgrade firmware

Open Tools/WeActStudio_Upgrade_Tool and follow the prompts.

How to completely empty Flash

Open the STM32CubeProgrammer, connect the SWD interface of the module using STLink, and perform the following operations:

If you need to restore factory Firmware, see the Firmware/README instructions

Catalog Description

Directory name	content
Doc	Datasheet
Hardware	Hardware development data
Examples	Software routines
Tools	Tools

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