A simple SoC with VexiiRiscv. Just big enough to exploit all resources on ice40up5k.
synth_ice40 -dsp with 2 SPRAMs manually blackboxed:
Info: Device utilisation:
Info: ICESTORM_LC: 4853/ 5280 91%
Info: ICESTORM_RAM: 16/ 30 53%
Info: SB_IO: 4/ 96 4%
Info: SB_GB: 8/ 8 100%
Info: ICESTORM_PLL: 0/ 1 0%
Info: SB_WARMBOOT: 0/ 1 0%
Info: ICESTORM_DSP: 6/ 8 75%
Info: ICESTORM_HFOSC: 0/ 1 0%
Info: ICESTORM_LFOSC: 0/ 1 0%
Info: SB_I2C: 0/ 2 0%
Info: SB_SPI: 0/ 2 0%
Info: IO_I3C: 0/ 2 0%
Info: SB_LEDDA_IP: 0/ 1 0%
Info: SB_RGBA_DRV: 0/ 1 0%
Info: ICESTORM_SPRAM: 2/ 4 50%
Fmax = 20.16 MHz
synth_ice40 -dsp -abc2 with 2 SPRAMs manually blackboxed:
Info: Device utilisation:
Info: ICESTORM_LC: 4857/ 5280 91%
Info: ICESTORM_RAM: 16/ 30 53%
Info: SB_IO: 4/ 96 4%
Info: SB_GB: 8/ 8 100%
Info: ICESTORM_PLL: 0/ 1 0%
Info: SB_WARMBOOT: 0/ 1 0%
Info: ICESTORM_DSP: 6/ 8 75%
Info: ICESTORM_HFOSC: 0/ 1 0%
Info: ICESTORM_LFOSC: 0/ 1 0%
Info: SB_I2C: 0/ 2 0%
Info: SB_SPI: 0/ 2 0%
Info: IO_I3C: 0/ 2 0%
Info: SB_LEDDA_IP: 0/ 1 0%
Info: SB_RGBA_DRV: 0/ 1 0%
Info: ICESTORM_SPRAM: 2/ 4 50%
Fmax = 20.31 MHz
synth_ice40 -dsp -flowmap with 2 SPRAMs manually blackboxed: Failed, exceeded LC limitation.
synth_ice40 -dsp -abc9 with 2 SPRAMs manually blackboxed:
Info: Device utilisation:
Info: ICESTORM_LC: 4935/ 5280 93%
Info: ICESTORM_RAM: 16/ 30 53%
Info: SB_IO: 4/ 96 4%
Info: SB_GB: 8/ 8 100%
Info: ICESTORM_PLL: 0/ 1 0%
Info: SB_WARMBOOT: 0/ 1 0%
Info: ICESTORM_DSP: 6/ 8 75%
Info: ICESTORM_HFOSC: 0/ 1 0%
Info: ICESTORM_LFOSC: 0/ 1 0%
Info: SB_I2C: 0/ 2 0%
Info: SB_SPI: 0/ 2 0%
Info: IO_I3C: 0/ 2 0%
Info: SB_LEDDA_IP: 0/ 1 0%
Info: SB_RGBA_DRV: 0/ 1 0%
Info: ICESTORM_SPRAM: 2/ 4 50%
Fmax = 18.69 MHz
synth_ice40 -dsp -spram: Failed, couldn't build a 2*16-bit SPRAM for the 32-bit RAM.