氷雨 - IceStorm
Features:
- 8 LEDs
- 8 Switches
- On board Oscillator
- 128K SRAM
- 44 available IO on header pins
It allows 3 modes of operation:
- Configuring from SPI flash memory
- Configuring from an external SPI master device such as a Raspberry Pi (3.3V!)
- Programming the SPI flash memory from an external SPI master device
Binaries can be built with the IceStorm toolchain or the official Lattice tools.
Bugs:
- GNDPLL is connected to Ground. Using the PLLs might cause issues.
- For FPGA configuration from SPI flash SS and CS_FLASH must be connected.
Fix: Don't place R5 and put a jumper between SS1 and SS2 when FPGA should configure from SPI flash.