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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I'd recommend giving vexriscv a look. It'll handily fit on your FPGA, leaving plants of room for I2C, VGA output, and whatever multiplication you end up wanting to do. It's very easy to get set up, and their example "briey" SOC even has VGA output already, but not hardware I2C (though you could easily bitbang it with the core). Adding in I2C via a "plugin" should be trivial.
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