Among them, the MCU mainly realizes functions of AD sampling control, keyboard keys control and transmitting data directive to FPGA; FPGA mainly realizes functions of temperature curve fitting, PID control algorithm, as well as PWM waveform generator. 其中,单片机主要实现AD采样控制、键盘按键控制以及向FPGA传送数据指令的功能;FPGA主要实现温度曲线拟合、PID控制算法以及PWM波形产生等功能。
Singlechip is chosen as microcontroller for the input device and the value of sampling depth is set with keyboard. 输入装置采用单片机作为微控制器,通过键盘输入实现设定取样器的取样水深数据。
Appling the OMAP embedded system into portable instrument design is described. A portable instrument for data acquisition and analysis is designed and implemented. Also, several crucial technical problems, such as sampling, processing, displaying, keyboard management, are solved. 对OMAP嵌入式系统在便携式仪器设计中的应用进行了研究,设计实现了一个基本的便携式数据采集分析仪器系统,解决了关键的采集、处理、显示、键盘管理等技术问题。
In the paper, we designed the hardware circuits of the testing system, including sampling circuits, A / D switched circuits, keyboard circuits and display circuits, etc. 设计了测试系统的硬件电路,包括采样电路、A/D转换电路、键盘电路、显示电路等;
Software design, including the programming of master-control program, the programming of A / D transfer, the realization of self-adaptive integral period sampling, the programming of FFT with assemble language, the programming of keyboard / LCD service and the programming of USB communication. 系统的软件设计,包括主控程序、A/D采样程序、自适应整周期采样的实现方法、FFT程序的DSP汇编语言实现的原理和算法,按键和液晶显示服务程序以及USB通讯程序。