Controller for excitation output by waveform self-defining based on AVALON bus and control method thereof

Abstract

The invention relates to a controller for excitation output by waveform self-defining based on an AVALON bus and a control method thereof, and belongs to the field of excitation output control. The existing controller for controlling peripherals in FPGA (field programmable gate array) has the defects of troublesome control process, easy mistaking, difficult adjusting, poor flexibility and universality, and long design time. The method comprises the following steps of enabling a microprocessor to store the setting number of waveform generation channels, waveform data information and a series of waveform discrete point values into an RAM (random access memory); starting a DA (digital to analog) conversion controller, repeatedly reading the waveform data information in the RAM, and respectively writing into corresponding registers; configuring the waveform data information under the mutual action of time interval controllers; starting a DA chip to convert and generate an expected task waveform. The method has the characteristics that the method is applied into the system for providing the excitation output, and the DA conversion chip with an SPI (serial peripheral interface) and a PIO (parallel input and output) interface is controlled to generate the waveform excitation output meeting the expectation of a user; the actual application value is high, the flexibility and convenience in use are realized, the universality is strong, and the like.

Description

technical field

[0001] The invention relates to a controller and a control method based on an AVALON bus-based self-defined waveform excitation output. Background technique

[0002] In many cases, users need the hardware system to be able to generate stimulus output according to a custom arbitrary waveform to meet some special needs. This process includes two parts: reading and storing user-defined waveform information data and generating consistent excitation output according to the stored waveform information. The whole process involves the control of many peripheral devices around the DA chip with SPI interface and PIO interface. At present, FPGA is mostly used to complete the control of peripherals. Due to the complexity of the entire control process, the logic written by the traditional method has the disadvantages of cumbersome control process, error-prone, difficult adjustment and modification, poor flexibility and versatility, and the entire design process takes a l...

Images