Reduced controller loading and peripheral usage for displacement measurement device excitation
AssigneeHamilton Sundstrand Corporation
InventorsManish Kumar, Tanay Ghose
Life of this patent
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Abstract
In accordance with at least one aspect of this disclosure, a system includes a main control device, including one or more of: a serial peripheral interface, a direct memory access, a central processing unit, a timing peripheral module, and/or a variable peripheral module, configured to output one or more excitation signals to a displacement measuring device, and an intermediate control module operatively connected between the main control device and the displacement measuring device configured to control communication of the one or more control signals from the main control device to the displacement measuring device based at least in part on a timing control signal from the timing peripheral module.
Claims8
A method, comprising:
- operating a system in two operational modes, a first start-up and data loading mode and a second excitation generation mode, sequentially, wherein the system includes a micro control unit, an intermediate control module, a digital to analog converter, and a displacement measuring device, wherein operating the system includes:
- in the first start up and data loading mode:
- interfacing the intermediate control module to the micro control unit via a serial peripheral interface;
- generating waveform data in the micro control unit and sending the waveform data to the intermediate control module to be stored in a lookup table via the serial peripheral interface;
- and
- disconnecting the intermediate control module from the serial peripheral interface;
- and
- in the second excitation generation mode;
- reading the waveform data directly from the intermediate control module with the digital to analog converter;
- converting the waveform data in the lookup table from digital signals to analog voltage signals and sending the analog voltage signals to the displacement measuring device as excitation voltage;
- and
- operating one or more external peripheral interfaces via the serial peripheral interface in parallel with reading and converting.
Dependencies are inferred from the claim text.