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PiCAN2 CAN Bus HAT for Raspberry Pi - Getting Access To The 40-pin GPIO Header
In the past, we had received a number of inquiries regarding the PiCAN2's 40-pin GPIO header, which is designed in a way that it prohibits access to unused GPIOs. Besides the power supply, the PiCAN2 board (one CAN port) itself uses only 6 signals, while the remaining signals cannot be accessed when the board is [...]
Heavy Duty Truck Diagnostics And Scan Tool Supports OBD-II, SAE J1939, SAE J1708 & 1587 Protocols
The CR-HD unit is the perfect tool for diagnosing and clearing heavy duty diagnostic trouble codes. It covers SAE J1587, SAE J1708 and SAE J1939 protocols for accessing Engine, Transmission, Brakes and more. It features a 2.8” full color LCD display and is ergonomic, highly portable and easy to use. Perfect Scan Tool for Heavy Duty Truck works on [...]
SAE J1939 Programming with Arduino – End of Message Acknowledgment Timeout
This post is part of a series about SAE J1939 ECU Programming & Vehicle Bus Simulation with Arduino. In order to test all timeouts during an RTS/CTS session, I used a dedicated Arduino sketch to simulate all the “nasty” features that would trigger a communication breakdown. This method was easier to implement rather than using a full SAE J1939 stack. [...]
SAE J1939 Programming with Arduino – Clear to Send Timeout
This post is part of a series about SAE J1939 ECU Programming & Vehicle Bus Simulation with Arduino. The simplest test for a Clear to Send timeout is accomplished by running the Mega 2560 ECU as the only node in the network.To test this scenario, I run the Mega 2560 at an address of 0x80 (128) and attempt to initiate [...]
Mini PCI Express Real-Time Interface For CAN Bus Or CAN FD
Kvaser announced their Mini PCI Express HS v2, a single-channel and a dual-channel Mini PCI Express interface boards with low latency designed for real-time environments. The two single- and dual-channel interfaces communicate with the PC over the PCI Express system bus, allowing for real-time performance and 1 µs time-stamping. They support both Classical CAN and CAN FD and [...]
SAE J1939 Programming with Arduino – RTS/CTS Session Message Timing
This post is part of a series about SAE J1939 ECU Programming & Vehicle Bus Simulation with Arduino. Note the time stamps from line 3 through line 5 of the screen shot (look at the last four numbers indicating the time in tenth of milliseconds; for instance 352.4 milliseconds in line 3). SAE J1939/21 requires a packet frequency between 50 [...]
SAE J1939 Programming with Arduino - Transport Protocol – RTS/CTS Session (SAE J1939/21)
This post is part of a series about SAE J1939 ECU Programming & Vehicle Bus Simulation with Arduino. Test items include: Basic function Timing controlNaturally, for the RTS/CTS session we will need two SAE J1939 nodes. In my setup that means communication between the Arduino Uno and the Mega 2560 ECUs. [...]
SAE J1939 Programming with Arduino - BAM Session Message Timing
This post is part of a series about SAE J1939 ECU Programming & Vehicle Bus Simulation with Arduino. Looking at the below image, note the time stamps from line 1 through line 4 of the screen shot (look at the last four numbers indicating the time in tenth of milliseconds; for instance 942.4 milliseconds in line 1). SAE J1939/21 requires a [...]
SAE J1939 Programming with Arduino - BAM Session (SAE J1939/21)
This post is part of a series about SAE J1939 ECU Programming & Vehicle Bus Simulation with Arduino. Test items include: Basic function Timing controlThe initial test of the BAM session requires only one ECU, in this case I am using the full protocol running on the Arduino Mega 2560 [...]
SAE J1939 Programming with Arduino - Sending and Receiving Messages
This post is part of a series about SAE J1939 ECU Programming & Vehicle Bus Simulation with Arduino. Proving the capability of the most basic task of sending and receiving regular 8-byte (CAN) messages must be seen as an unnecessary test, since that had already taken place in previous chapters. Things change, however, with the transmission and reception of J1939 [...]