详细介绍了以FPGA为主控器的设计方案，包括SDRAM内部接口设计、数据传输过程以及乒乓操作的实现方法。

The design scheme which USES FPGA as the main controller is presented in detail, including the internal interface of SDRAM, process of data transmission and realization of ping-pong operation.

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然后经过一级可变增益放大器，在经过A/D变换，通过单片机串口将数字数据传输到ARM主控制板内进行处理。

Then after a variable gain amplifier, After A / D conversion and through the microcontroller serial digital data to the ARM within the main control panel for processing.

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然后经过一级可变增益放大器，在经过A/D变换，通过单片机串口将数字数据传输到ARM主控制板内进行处理。

Then after a variable gain amplifier, After A / D conversion and through the microcontroller serial digital data to the ARM within the main control panel for processing.

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