Design of communication interface in a video vehicular detection system based on ARM and DSP

A new design of dual-cored embedded video vehicular detection based on ARM processor S3C2410A and TMS320C6211 DSP is presented. It lays emphasis on the design of communication interface between ARM and DSP units, including hardware implementation and software program. Exploiting ARM-Linux as embedded operation system, ARM unit communicates with DSP unit in real time through the host port interface (HPI) of DSP. ARM regards the HPI as a character device to do operations such as reading and writing on it. Compared with common video vehicular detection systems, this system has advantages of small volume, low cost, low power consumption, good stability and expandability, facility of operation, friendly interface and high operating speed, and it can satisfy the demand on real-time.