在DM642开发板中，视频编码部分采用saa7105，其主要功能就是将处理后的数字信号，转换为视频信号并输出，本程序为控制saa7105的工作！,In the DM642 development board, the video coding part of the use of saa7105, its main function is to deal with after the digital signal, convert the video signal and output, the procedures for the control of saa7105 work!