基于FPGA和TFT的液晶示波器設(shè)計

　　設(shè)計了以FPGA為核心采集模塊，以單片機為顯示控制核心，以TFT彩屏液晶為顯示器件的便攜數(shù)字存儲示波器。通過異步FIFO實現(xiàn)了FPGA中高速數(shù)據(jù)流與單片機處理速度之間的速率匹配。以三總線結(jié)構(gòu)以及控制信號的握手協(xié)議為基礎(chǔ)，保證了FPGA與單片機通信的有效性和可靠性。該系統(tǒng)具有自動頻率控制(AFC)和自動增益控制(AGC)的功能，可以方便地對信號進行測量。

　　Abstract:

　　A kind of portable digital storage oscilloscope (DSO) is developed in this paper. It works with FPGA as core acquisition module， MCU as the display and control center， and TFT colorized LCD as its display device. By using asynchronous FIFO， it realizes the speed match between high data flow in FPGA and processing speed of MCU. The validity and reliability between the communications of FPGA and MCU is guaranteed by the three-bus structure and handshaking-agreement. This system has the function of automatic frequency control (AFC) and automatic gain control (AGC)， and it can measure the signal conveniently.