J1939 is a series of SAE recommended practices that have been developed to provide a standard architecture by which multiple electronic systems on a vehicle can communicate. It was developed by the Truck and Bus Control and Communications Network Subcommittee of the Truck and Bus Electrical and Electronics Committee, but its use is not limited to truck and bus applications. J1939 has been implemented in a broad range of vehicles and transportation systems. J1939 provides a communication protocol over a CAN network. The CAN network is comprised of two or more interconnected Electronic Control Units (ECUs). As per the SAE J1939-11 specification. the ECUs are connected using linear shielded twisted pair wiring, with a data rate of 250 Kbits/second. AN930 J1939 C Library for CAN-Enabled PICmicro Microcontrollers Author: Kim Otten Microchip’s CAN-enabled PICmicro devices provide a Kim Otten Software Consulting powerful, flexible and low-cost means of implementing the J1939 protocol on a wide variety of electronic Co-Author: Caio Gübel vehicle components. The J1939 C library handles the Microchip Technology Inc. majority of network management aspects of J1939, allowing the user to con……