Waveform generating system and method based on microcontroller
A microcontroller and waveform technology, applied in electrical pulse generator circuits and other directions, can solve problems such as affecting system control performance and occupying a large amount of SRAM, and achieve the effects of increasing the number of data, reducing design costs, and improving waveform accuracy
Inactive Publication Date: 2014-07-30
HENAN UNIV OF SCI & TECH
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problem that the existing microcontroller-based waveform generation system occupies too much SRAM due to the repetition of waveform data in each cycle, which affects the control performance of the system
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[0021] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0022] An embodiment of a microcontroller-based waveform generation system of the present invention
[0023] The present invention produces such as figure 1 The waveform shown is taken as an example to describe the system diagram for generating this waveform in detail, as figure 2 As shown, the circuit includes a microcontroller, a decoder for generating a chip select signal, a buffer and a latch for expanding the I / O port, a dual-port SRAM for storing digital waveform data, and generating a basic clock The clock chip, the frequency divider used to generate the different clocks required by the system, the 8-bit reversible binary counter used to generate the 0-5V output of the SRAM address, and the 8-bit D / A conversion used to convert the digital waveform into an analog waveform device, a 1-bit counter for judging the generation of repetit...
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The invention relates to a waveform generating system and a waveform generating method based on a microcontroller. The microcontroller, a double-port static random access memory (SRAM) and a reversible binary counter are utilized, firstly, a section of initial unrepeated waveform data in the waveform period is written into the SRAM, then, the size symmetry of a section of waveform data at the back side in the period and the waveform data stored in the SRAM is utilized, in addition, the reversible binary counter is used for counting completing signals so that the counting mode and the amplifying circuit form are selected before the re-counting starting, then, the counter works, and in addition, the waveform data stored in the SRAM is output after passing through digital-to-analog converter and proper amplifying circuits. The system and the method have the advantages that the data number in each period can be increased, so the waveform precision is improved, the repeated data is eliminated, only basic waveform data is stored, the size of the SRAM can be reduced, and the design cost is reduced.
Description
technical field [0001] The invention relates to a microcontroller-based waveform generation system and method. Background technique [0002] Today, devices often use an embedded microcontroller as the main controller. Unfortunately, it is impractical to implement specific waveforms as a direct result of microcontroller instruction execution for the following reasons: First, the CPU needs to execute higher-priority control tasks, asynchronous interrupts Services, etc. make the CPU instruction sequence change; on the other hand, if the CPU spends all its time on the instruction sequence generated by the digital waveform in a certain period of time, then some other important tasks will be difficult to run, thus affecting the control of the system performance. Based on the above reasons, the hardware circuit based on microcontroller design waveform generation can guarantee the real-time performance of waveform generation. However, the current design idea is to take enough dat...
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IPC IPC(8): H03K3/02
Inventor 张海涛张聚伟梁云朋叶宇程白舸
Owner HENAN UNIV OF SCI & TECH