基于DSP的相机控制器CAN总线通信系统

摘要

Space camera controller requires more interfaces and higher processing speed.In order to meet these requirements and realize safe and reliable communication with upper computer, this paper introduces a design method of camera controller based on DSP+ FPGA architecture, and choose CAN bus to communicate with upper computer.The realization method of CAN bus communication systems is detailed.The USB bus is used to communicate with computer in order to complete ground testing.Results show that this system has 500kbps communication speed, low bit error ratio and no loss of frames, meeting the reliability and real-time requirements of camera controller.%为了满足空间相机控制器控制接口多、处理速度高的要求,实现空间相机控制器与上位机安全可靠地通信,介绍了一种DSP+FPGA结构的相机控制器设计方法,并采用了CAN总线与上位机通信.详细介绍了相机控制器的CAN总线通信系统的实现方法.最后采用了USB总线与计算机通信,完成系统的地面测试任务.实验表明,系统通信速率可达500kbps.误码率低,无丢失帧现象,满足相机控制器实时性与可靠性的要求.