FIFO芯片和单片机实现的图像采集系统

基于FIFO芯片AL422B，以飞思卡尔16位单片机MC9S12DG128为核心，采集摄像头芯片OV7670的图像信息，设计出以低速率的单片机采集高速率图像的图像采集系统。系统采用单片机控制FIFO芯片，先由FIFO实时读取摄像头芯片的一幅完整图像信息，再由单片机以低速率从FIFO的相应寄存器读取该幅图像，读取的同时进行相应的图像处理，得出所需图像中点光源的像素距离后通过FIFO进行下一幅图像的采集。本方案通过样机实验，完全能满足要求，确保了一副图像的完整性。

Image Acquisition System Based on FIFO Chip and MCU

Based on FIFO chip AL422B, the paper takes Freescale 16 bit MCU MC9S12DG128 as the core, collects image information from camera chip OV7670 to realize the low rate MCU high speed image acquisition system. The system adopts the MCU control FIFO chip, the FIFO reads complete image information from camera at real time, and then MCU reads images from the FIFO corresponding register at low speed. At the same time the MCU processes the corresponding image in order to get the image point source pixel dis- tance, and the design acquires the next image by FIFO. The project meets the requirement through proto and ensures image integrity.