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iCESugar-nano

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• iCESugar-nano
• Hardware
  • iCE40LP1K
  • SPI-Flash
  • Peripheral
  • iCELink
• virtual-machine-image
• How-to-setup
• How-to-buy
• Reference

iCESugar-nano

iCESugar-nano is a FPGA board base on Lattice iCE40LP1K-CM36, which is fully supported by the open source toolchain (yosys & nextpnr & icestorm), 14 usable IOs fan-out with 3 standard PMOD interface, the on board debugger iCELink (base on ARM Mbed DAPLink) support drag-and-drop program, you can just drag the FPGA bitstream into the virtual disk to program, the iCELink also provide a adjustable clock to FPGA, and with a additional USB CDC serial port direct connect to FPGA, so you can only use one TYPE-C cable to develop and test.

Hardware

iCE40LP1K

iCE40LP1K-CM36 (BGA36 0.4mm pitch)

1. 1280 Logic Cells (LUT + Flip-Flop)
2. 64K bit RAM (4K bit RAM x 16)
3. High Current LED Drivers x 3

SPI-Flash

SPI Flash use W25Q16 (2MB)

Peripheral

1. a yellow led is connected to B6.
2. most IO out with standard PMOD Interface (one 2 x 6 PMOD and two 1 x 6 PMOD).

iCELink

iCESugar-nano has a on board debugger named iCELink (base on APM32F1)，you can only use one USB wire to program the FPGA and debug, here is detail:

1. drag-and-drop program, just drop the bitstream into the virtual USB DISK iCELink, then wait a few second, the iCELink firmware will do the total program work
2. USB CDC serial port, it can use to communicate with FPGA
3. the MCO can provide 8MHz/12MHz/36MHz/72MHz clock for FPGA as extern clock.
4. use the command tool icesprog to flash or do more config, here is the help info

$icesprog -h
usage: /home/pi/oss/icesugar/tools/icesprog.arm [OPTION] [FILE]
             -w | --write                   write spi-flash or gpio
             -r | --read                    read  spi-flash or gpio
             -e | --erase                   erase spi-flash
             -p | --probe                   probe spi-flash
             -o | --offset                  spi-flash offset
             -l | --len                     len of write/read
             -g | --gpio                    icelink gpio write/read
             -m | --mode                    icelink gpio mode
             -j | --jtag-sel                jtag interface select (1 or 2)
             -c | --clk-sel                 clk source select (1 to 4)
             -h | --help                    display help info

             -- version 1.1a --

You can find icesprog here

Tips

The iCELink on iCESugar-nano can adjust the mco clock between 8/12/36/72MHz, here is the usage. note: the mco clock will return to the default 12MHz after perform a board power-off power-on reset.

$icesprog -c ?
CLK -> [12MHz]
CLK-SELECT:
        [1]:  8MHz
        [2]: 12MHz
        [3]: 36MHz
        [4]: 72MHz
done

$icesprog -c 1
CLK -> [ 8MHz]
CLK-SELECT:
        [1]:  8MHz
        [2]: 12MHz
        [3]: 36MHz
        [4]: 72MHz
done

virtual-machine-image

link：https://pan.baidu.com/s/1qVSdwM7DnFbaS0xdqsPNrA
verify code：6gn3
user: ubuntu
passwd: ubuntu
or https://mega.nz/file/uvJTWKrK#1bBgBkJPZrszwHQSTHHL-RLjxGIru0Qv0qUgmULZZVs

the env include yosys, nextpnr, icestorm, gcc, sbt.

How-to-setup-env

Linux

recommend use the virtual machine, it simple and convenient
FPGA toolchain reference icestorm
gcc toolchain reference riscv-gnu-toolchain
Alternatively, you can download the pre-built toolchain provided by xPack or SiFive

• https://xpack.github.io/riscv-none-embed-gcc/install/
• https://www.sifive.com/software
• icesprog is command tool stand for iCESugar Program，it depend libusb and hidapi
  $sudo apt-get install libhidapi-dev
$sudo apt-get install libusb-1.0-0-dev

Windows

now you can use the msys2 environment to setup the open source toolchain easily, download msys2 install executable here, install it, then open the msys2 mingw terminal (search msys2 in windows start menu)

#pacman -Syu
#pacman -S mingw-w64-x86_64-eda

select the yosys, nextpnr, icestorm, icesprog and install, after installed, everything is same as in linux!

How-to-buy

you can buy iCESugar-nano and PMOD peripherals from our offcial aliexpress shop Muse Lab Factory Store

Reference

icestorm toolchain

http://www.clifford.at/icestorm/

riscv gcc toolchain

https://xpack.github.io/riscv-none-embed-gcc/install/ https://www.sifive.com/software

iCESugar

https://github.com/wuxx/icesugar

Examples

https://github.com/damdoy/ice40_ultraplus_examples
https://github.com/icebreaker-fpga/icebreaker-examples

SpinalHDL

https://spinalhdl.github.io/SpinalDoc-RTD/SpinalHDL/Getting%20Started/index.html