XC6SLX9-2CPG196C

Integrated Circuit (IC) Embedded - FPGA (Field Programmable Gate Array)

Logic analyzers are widely used tools in digital design verification and debugging. They can verify that digital circuits are working properly and help users find and troubleshoot problems. Multiple signals can be captured and displayed at a time, and the temporal and logical relationships of these signals can be analyzed. According to the differences in the design of hardware equipment, the current logic analyzers can be roughly divided into stand-alone and card-type virtual logic analyzers that need to be combined with a computer. Stand-alone logic analyzers have excellent performance, but are expensive and are rarely used by general users. The portable logic analyzer implemented in this project provides corresponding performance at a lower cost. Although the performance has decreased, it can fully meet the general logic signal analysis, and the cost is greatly reduced, and the instrument is small in size. It is easy to carry and suitable for ordinary users.

1. The logic analyzer can realize 16-channel logic analysis, and the input signal can be analog or digital; it can measure a wide range of input levels, and supports 1.8-5 V level sampling; the chip CY7C68013A is used as the main control chip, and the USB 2.0 Connect it with a computer to transmit data information, use FPGA to achieve high sampling rate, each channel supports 12 Mbit s-1 high-speed sampling; the sampled signals are stored in the memory in sequence. The sampling information is organized in the memory according to the principle of "first in, first out". After obtaining the display command, the information is read out one by one according to the sequence, and the measured display is carried out according to the set display mode. In this way, the required digital waveform can be observed in the software interface, and the trigger mode can be set to display the required waveform.