Controller Area Network (CAN) interface in embedded systems:

Controller Area Network (CAN) interface in embedded systems: History: CAN or Controller Area Network or CAN-bus is an ISO standard computer network protocol and bus standard, designed for microcontrollers and devices to communicate with each other without a host computer. Designed earlier for industrial networking but recently more adopted to automotive applications, CAN have gained widespread popularity for embedded control in the areas like industrial automation, automotives, mobile machines, medical, military and other harsh environment network applications. Development of the CAN-bus started originally in 1983 at Robert Bosch GmbH. The protocol was officially released in 1986. and the first CAN controller chips, produced by Intel and Philips, introduced in the market in the year of 1987. Introduction: The CAN is a "broadcast" type of bus. That means there is no explicit address in the messages. All the nodes in the network are able to pick-up or receive all transmissions. There is no way to send a message to just a specific node. To be more specific, the messages transmitted from any node on a CAN bus does not contain addresses of either the transmitting node, or of any intended receiving node. Instead, an identifier that is unique throughout the network is used to label the content of the message. Each message carries a numeric value, which controls its prio...