# OpenICE **Repository Path**: niuniu4/OpenICE ## Basic Information - **Project Name**: OpenICE - **Description**: No description available - **Primary Language**: Unknown - **License**: Not specified - **Default Branch**: master - **Homepage**: None - **GVP Project**: No ## Statistics - **Stars**: 1 - **Forks**: 0 - **Created**: 2020-11-16 - **Last Updated**: 2021-04-27 ## Categories & Tags **Categories**: Uncategorized **Tags**: None ## README OpeniCE ----------- # 来源 开源FPGA应具备几个维度特点： ![OpenICE](https://github.com/OpenFPGA-ICE/OpenICE/blob/master/doc/%E6%9E%84%E5%9B%BE.png?raw=true) 其中最难弄得就是工具链了，经过长时间查找，终于在GitHub上找到了一个FPGA的开源工具链Yosys，选择的理由如下： Intel Quartus II （No ）License Xilinx Vivado ISE (No) License Lattice Diamond (No) License 注册可以免费申请，但是随时可以收回（一般不会） Yosys, nextpnr, icestorm, iverilog, symbiflow （YES） 整个工具链开源 支持的硬件： http://www.clifford.at/icestorm/ 折中选择ICE40UP5K-SG48芯片。 为什么选择ICE40系列FPGA呢？ Lattice的iCE40系列芯片在国外很受欢迎，大部分的开发环境都是开源的，不需要担心License所带来的限制，只需要将工具链进行安装之后就可以进行FPGA的开发之路，典型的基于iCE40系列的开源开发板有iCEBreaker、UPduino、BlackIce、iCEstick、TinyFPGA 等。 每个开发版对比如下： 表格来源：https://www.crowdsupply.com/1bitsquared/icebreaker-fpga | | iCEBreaker | TinyFPGA BX | Tomu FPGA | Lattice ICEstick | UPDuino v2.0 | ICE40UP5K Breakout | Alhambra II | ICE40HX8K Breakout | | :-------------------------------------- | :------------------------------- | :----------------- | :----------------- | :---------------------------- | :---------------------------- | :---------------------------- | :--------------------------- | :---------------------------- | | License | OSHW | OSHW | OSHW | Closed | Closed | Closed | OSHW | Closed | | Price | $65 | $38 | $?? | ~$25 | $13.99 | $49 | $59.90 | $49 | | Schematics Published? | Yes | Yes | Not Yet | Yes | Yes | Yes | Yes | Yes | | Design files Published? | Yes | Yes | Not Yet | No | Yes | No | Yes | No | | **FPGA** | | | | | | | | | | Model | iCE40UP5K | iCE40LP8K | iCE40UP5K | iCE40HX1K | iCE40UP5K | iCE40UP5K | iCE40HX4K(8K) | iCE40HX8K | | Logic Capacity (LUTs) | 5280 | 7680 | 5280 | 1280 | 5280 | 5280 | 3520 (7680) | 7680 | | Internal RAM (bits) | 120k + 1024k | 128k | 120k + 1024k | 64k | 120k + 1024k | 120k + 1024k | 80k | 128k | | Multipliers | 8 | 0 | 8 | 0 | 8 | 8 | 0 | 0 | | **Peripherals** | | | | | | | | | | USB Interface | FTDI 2232HQ | On FPGA Bootloader | On FPGA Bootloader | FTDI 2232HL | FTDI 232HQ | FTDI 2232HL | FTDI 2232HQ | FTDI 2232HL | | USB HS FIFO/SPI interface to the FPGA | Yes through Jumper Mod | No | No | No | No | No | No | No | | USB Serial (UART) interface to the FPGA | Yes | No | No | Yes | No | Yes | Yes | Yes | | GPIO inline termination resistors | Yes 33 Ohm | No | No | No | No | No | Yes 300 Ohm | No | | User IOs | 27 + 7 | 41 + 2 | 4 + 2 | 18 | 34 | 34 + 2 | 20 | 90 + 10 | | Pmod Connectors | 3 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | | User Buttons | 1 Tact + 3 Tact on Breakoff Pmod | 1 CRESET | 2 Capacitive | 0 | 0 | 4 DIP | 2 Tact | 0 | | User LED | 2 + 5 on Breakoff Pmod | 1 | 0 | 5 | 1 RGB | 1 RGB | 8 | 8 | | Indicator LED | PWR, CDONE | PWR | | | CDONE, FTDI-TX/RX | PWR, CDONE | PWR, CDONE, FTDI-TX/RX | PWR, CDONE | | Onboard Clock | 12 MHz MEMS Shared with FTDI | 16 MHz MEMS | 12 MHz MEMS | 12 MHz MEMS? Shared with FTDI | 12 MHz MEMS? Shared with FTDI | 12 MHz MEMS? Shared with FTDI | 12 MHz MEMS Shared with FTDI | 12 MHz MEMS? Shared with FTDI | | Flash | 128 Mbit QSPI DDR | 8 Mbit SPI | 16 Mbit SPI | 32 Mbit SPI | 32 Mbit SPI | 32 Mbit SPI | 32 Mbit SPI | 32 Mbit SPI | | **FPGA Power Delivery** | | | | | | | | | | Dedicated GND/Power Planes | Yes | Yes | No | Yes | No | Yes | Yes | Yes | | Dedicated FPGA Bypass Capacitors | 19 | 8 | 9 | 18 | 2 | 19 | ? | ? | | IO GND Connections | 11 | 6 | 1 | 4 | 3 | 8 | 22 | 20 | | **Software** | | | | | | | | | | Open Source Toolchain | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | | APIO | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | | icestudio | Yes | Yes | Not Yet | Yes | Yes | Yes | Yes | Yes | | migen | Yes | Yes | No | Yes | No | Yes | No | Yes | 硬件上也可以参考：https://github.com/icebreaker-fpga/icebreaker-examples 其中icebreaker可以直接采购，但是国内买还是偏难，而且价格上也比较贵，综合考虑还是自己参考官方的DEMO和icebreaker自己做，原则上尽量减少改动。 # OpenICE介绍 OpenICE 是基于Lattice iCE40UP5k设计的开源FPGA开发板，开发板以Arduino为原型进行设计，资源丰富，板载RGB LED，KEY，TYPE-C-USB, RESET，大部分IO以标准PMOD接口引出，可与标准PMOD外设进行对接，方便日常的开发使用。 板载的调试器以FT2232H为核心设计，支持官方的EDA进行下载调试，同时经过开源工具链ICEProg就可实现轻松实现烧写。FT2232H同时支持虚拟串口和FPGA进行通信。 整版的原理框图如下： ![OpenICE](https://github.com/OpenFPGA-ICE/OpenICE/blob/master/doc/%E6%A1%86%E5%9B%BE.png?raw=true) PCB截图如下： ![OpenICE](https://github.com/OpenFPGA-ICE/OpenICE/blob/master/doc/OpenICE-PCB.png?raw=true) ![OpenICE](https://github.com/OpenFPGA-ICE/OpenICE/blob/master/doc/OpenICE.jpg?raw=true) # 芯片规格 iCE40UP5K-SG48 1. 5280 Logic Cells (4-LUT + Carry + FF) 2. 128 KBit Dual-Port Block RAM 3. 1 MBit (128 KB) Single-Port RAM 4. PLL, Two SPI and two I2C hard IPs 5. Two internal oscillators (10 kHz and 48 MHz) 6. 8 DSPs (16x16 multiply + 32 bit accumulate) 7. 3x 24mA drive and 3x hard PWM IP # 硬件说明 ### iCE40UP5K 1. SPI Flash使用W25Q64（8MB）/W25Q128(16MB) 2. 板载按键开关、LED和RGB LED可用于测试 3. 所有IO以标准PMOD接口引出 4. 板载电源指示灯V8，方便查看整版电源情况 **Capable enough to host CPU softcores** - [picorv32](https://github.com/cliffordwolf/picorv32/) - [picosoc](https://github.com/cliffordwolf/picorv32/tree/master/picosoc) - [RISC-V](https://riscv.org/) and others # 开发环境搭建 推荐使用虚拟机镜像进行开发测试，简单方便。 FPGA工具链安装请参考[icestorm](http://www.clifford.at/icestorm/) gcc工具链安装请参考 [riscv-gnu-toolchain](https://pingu98.wordpress.com/2019/04/08/how-to-build-your-own-cpu-from-scratch-inside-an-fpga/) # FPGA教程 # 参考 ### toolchain http://www.clifford.at/icestorm/ ### examples https://github.com/damdoy/ice40_ultraplus_examples https://github.com/icebreaker-fpga/icebreaker-examples ### SpinalHDL 教程 https://spinalhdl.github.io/SpinalDoc-RTD/SpinalHDL/Getting%20Started/index.html ### 开源FPGA单板OpenICE介绍 https://github.com/OpenFPGA-ICE/OpenICE/blob/master/README.md