A Real-time and Reliable Waveform Data Transmission Circuit Between FPGA and Microcontroller

Abstract

The invention discloses a real-time and reliable waveform data transmission circuit between FPGA and microcontroller. The circuit includes a conflict detection module, a waveform data candidate storage module, a data cross clock domain module, a microcontroller interface module, and a waveform data acquisition module. After the microcontroller sends a request to read waveform data, the circuit can accurately and reliably transmit the latest waveform data points refreshed in FPGA to the microcontroller. On the one hand, it ensures that the transmitted waveform data is the latest data collected by the FPGA at the current moment, on the other hand, it realizes strong real-time performance and high reliability of data transmission, and has strong engineering application value.

Description

technical field [0001] The invention relates to the technical field of data acquisition and communication, and more particularly to the field of data transmission between an FPGA and a microcontroller. Background technique [0002] The main control board in the control field often adopts the structure of FPGA + microcontroller. FPGA usually realizes a series of functions such as waveform acquisition and pin expansion. The microcontroller implements the control algorithm according to the real-time acquisition data of the current ADC and sends out corresponding control command. This requires that the data in the FPGA can be accurately and quickly transferred to the microcontroller. [0003] The microcontroller and FPGA often work under two asynchronous clocks (different frequencies or different phases at the same frequency), and the FPGA is responsible for continuously receiving the waveform acquisition data refreshed by the analog-to-digital converter in real time. The time ...

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This affects the accuracy of the control

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