基于USB接口的图像采集

Image Collection Basad USB Interfase

基于USB接口的图像采集由CPLD芯片XC95144XL与USB2.0控制器CY7C68013-PV、OV7640及1MSRAM构成,程序以VC++编制。CPLD通过SCCB控制OV7640视频数字输出,为USB2.0提供控制信号。用USB2.0提供的框架函数设计固件,通过应用程序得到USB句柄,向设备驱动程序发送请求,完成控制器数据批传输。

The image collection based on USB interface is made up of CPLD chip XC95144XL, USB2.0 controller CY7C68013, OV7640 and 1M SRAM, and the program was compiled by VC＋＋. The digital video output of OV7640 was controlled by CPLD through SCCB, it provided control signal for USB2.0. The firmware was designed with framework function supplied USB2.0, and USB handle was gained through application program, then sent request to device driver, at last it began to transmit batch data of controller.