i can see that icestorm support ice40 ultra plus up5k fpga, but this chip has internal osc, is there any example what i use it ? of course using yosys, icestorm (opensource) and is there some examples where i can use build in IP,s such as SPI, I2C, PWM ? Thanks
ICE40 up5k Internal internal oscilator and ip's
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No, it does not. There has been some preliminary work, but it is far from generating any up5k bit streams, with or without the internal oscillator. Only the devices listed on http://www.clifford.at/icestorm/ are supported (see table under the "What is the Status of the Project?" heading).