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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 [...]
IoT (Internet of Things) Development Board For Designing Secure, Google-Cloud-Connected Systems
Microchip Technology announced their AVR-IoT WG Development Board, an Internet of Things (IoT) rapid prototyping system, which is part of an expanded partnership with Google Cloud, thus letting designers to prototype connected devices. The solution links an AVR microcontroller (MCU), a CryptoAuthentication secure element IC and a fully certified Wi-Fi network controller to provide a way to [...]
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 [...]
SAE J1939 Programming with Arduino - Claiming Address With Contending Node
This post is part of a series about SAE J1939 ECU Programming & Vehicle Bus Simulation with Arduino. Now let’s have the two nodes compete for their addresses, since they both use the same preferred source address. For that purpose, it is important to consider which node starts up first, and the test results will demonstrate the difference.Test #1: Mega [...]
SAE J1939 Programming with Arduino - Claiming Address With No Contending Node
This post is part of a series about SAE J1939 ECU Programming & Vehicle Bus Simulation with Arduino. The first and by far simplest test is to check whether or not the node (Arduino Mega 2560) engages into the address negotiation process. This test is accomplished by a simple power cycle (reset) of the unit when no other competing node [...]
SAE J1939 Programming with Arduino - Address Claim Procedure (SAE J1939/81)
This post is part of a series about SAE J1939 ECU Programming & Vehicle Bus Simulation with Arduino. Network Management under SAE J1939 is primarily represented by the Address Claiming Process. While other higher layer protocols based on Controller Area Network (CAN Bus) do not support node address assignments per default, the SAE J1939 protocol provides yet [...]
Raspberry Pi CPU With CAN Bus Interface Now Upgraded To Raspberry Pi B+
Our Raspberry Pi 3 System With CAN Bus Interface (PiCAN2) has been upgraded to support the new Raspberry Pi B+, and it comes with a pre-installed Raspbian operating system. The system is equipped with either a single or dual PiCAN2 board, and, depending on the selected option, with or without SMPS (Switch Mode Power Supply). The [...]
SAE J1939 Programming with Arduino - Proof of Concept
This post is part of a series about SAE J1939 ECU Programming & Vehicle Bus Simulation with Arduino. Naturally, with the impression that the Arduino hardware is a far cry away from commercially available, industrial solutions, some doubters may challenge even the point that the Arduino software is up to the task of running a full SAE J1939 protocol stack. [...]