CANbus Switch Modul for e.g. Motorsport steering wheels CANchecked CFE18 CANbus Switch Modul for e.g. Motorsport steering wheels CANchecked add-on module, which has 18 ports Mit den CANchecked Displays haben Sie alle relevanten Werte im Blick. CFE18 stands for "Can Bus Function Extension" or colloquially also "Can Switch Board" - why is this module needed? Can bus connections in the vehicle sometimes pose great challenges for our customers. Especially in motorsport applications, when electronics have to be accommodated in the steering wheel and information from adjustment buttons (trimpots) or push buttons is then to be transmitted via Can Bus. CANchecked now offers a small additional module with 18 connections: 9 for push buttons and 9 for analog inputs (0-5V signal). A voltage converter to ensure connection to a 12V vehicle board network is also already integrated. With only 29x27mm, the board is kept very compact and can be placed anywhere. The pin spacing is 2.54mm - for the power supply, for safety reasons, 3.81mm. Holes for fastening are made, which can be used as a screw connection.. One use case would be a motorsport steering wheel. In the picture 4 you can see the approximate size, whereby the steering wheel hub is 50mm in diameter. With just 4 connections via a spiral cable, a wide variety of inputs can be transmitted via Can Bus. Switches and trimpots (adjustment buttons) can be connected to the CFE18. But sensors such as oil pressure, fuel pressure, boost pressure, exhaust back pressure and integration in a separate housing would also be conceivable. 18 - Can Bus Termination A solder jumper is attached to the circuit board. f you close this, the Can Bus termination with 120 ohms is active. By default the solder jumper is OPEN . Anschlüsse: 12V / GND (up) Voltage supply 6-22V (verpolungssicher) A0-A8 9 analog input (0-5V) D0-D8 9 digital input(max 5V) (internal Pullup 20-50K) 5V/SGND Voltage supply analog sensors or sensor ground CANL/CANH Can Bus connection (Can Low, Can High) CAN 2.0 A/B - 125, 250, 500, 1000 kbps AUX1-3* Low side outputs 0.5A maximum - *from board v0.8 RX/TX/DTR/GND optional: for possible updates (additional hardware required) - CFE18 connector / Default Can Bus Stream - The input data is queried and transmitted every 50ms (100Hz - variable from 1Hz to approx. 300Hz - depending on the smoothing ). The data is transmitted as "unsigned big endian". As soon as 12V and ground are connected, the green status LED on the front lights up and the Can Bus data is transmitted. table, th, td {padding: 10pxborder: 1px solid black border-collapse: collapse } Can Bus ID: 0x700 (Base Data CAN ID – änderbar) Byte 0 1 2 3 4 5 6 7 Base ID AIN0 0-1023 AIN1 0-1023 AIN2 0-1023 AIN3 0-1023 Base ID +1 AIN4 0-1023 AIN5 0-1023 AIN6 0-1023 AIN7 0-1023 Base ID +2 AIN8 0-1023 bit masked DIN0-7 bit masked DOUT1-3 internalTemp version - Digitale Outputs - table, th, td {padding: 10pxborder: 1px solid black border-collapse: collapse } *From Hardware v0.8 From hardware 0.8, the CFE18 has three digital outputs. These can be loaded up to a maximum of 500mA and switch to ground (LOW SIDE). To do this, a Can Bus frame is sent every 100ms (CAN Id can be configured here - from a 500ms pause between the frames, the timeout is activated and the outputs are deactivated): (0=inactive, 1=active) Byte 0 1 2 3 4 5 6 7 CAN RX ID (default: 0x640) AUX10/1 AUX20/1 AUX30/1 unused The setting is made via Can Bus - see configuration options - AIN smoothing - **From software version 3 If the analog inputs fluctuate too much, they can be smoothed out using software. This can be configured separately for each analog input. The analog inputs are evaluated with each transmission (default. 20Hz). table, th, td {padding: 10pxborder: 1px solid black border-collapse: collapse } Attitude Smoothing 0 no smoothing 1 2 2 4 3 8 4 16 5 32 6 64 For example, if a smoothing factor of 4 is set, the average of the last 16 measurements is taken. As a result, the value becomes calmer (smoother), but also reacts with a delay to fluctuations. Here you have to find a healthy middle ground. The setting is made via Can Bus - see " Configuration options ". - Configuration options - The following values ??can be adjusted via Can Bus: table, th, td {padding: 10pxborder: 1px solid black border-collapse: collapse } Data CAN ID: with which Can Id the data is sent default: 0x700 Config CAN ID: with which CAN Id the board can be configured - RESTART required default: 0x70A Frequenz: with which the data is sent via the CAN bus in milliseconds Default: 10ms = 100Hz Can Bus Speed: 1=125kbps, 2=250kbps,3=500kbps,4=1Mbit - NEUSTART erforderlich Default: 3 = 500kbps Modus: 0=default, 1=EMUv3, 2=Haltech IO12B, 3=Haltech IO12A+B, 4=Motec Default: 0 *Smoothing: smoothing of the analog inputs, configurable for each input (0-6) Default: 1 Byte 0 + 1 are always 0x0C and 0x0A. Byte 2 Feature beginning with 0x0A. Features: Can id: 0x0A (high byte) + 0x0B (lowbyte) Config can