nuttx

History

David Jablonski 41bddc8461 litex: fix mtime and mtimecmp register address		2021-02-13 15:24:28 -08:00
..
configs/nsh	litex: fix mtime and mtimecmp register address	2021-02-13 15:24:28 -08:00
include	Add support for Litex VexRiscV.	2020-03-21 06:01:56 +00:00
scripts	litex: nsh working	2021-02-13 15:24:28 -08:00
src	build: Move .config check to the top Makefile	2020-05-20 17:57:34 +01:00
Kconfig	Add support for Litex VexRiscV.	2020-03-21 06:01:56 +00:00
README.txt	Fix git clone repository	2021-01-20 22:35:59 +09:00

README.txt

1. Download and install toolchain

  $ curl https://static.dev.sifive.com/dev-tools/riscv64-unknown-elf-gcc-8.3.0-2019.08.0-x86_64-linux-ubuntu14.tar.gz

2. Follow instruction on https://github.com/enjoy-digital/litex to build the vexriscv softcore fpga gateware
   and flash to arty_a7 board

3. Configure and build NuttX

  $ mkdir ./nuttx; cd ./nuttx
  $ git clone https://github.com/apache/incubator-nuttx.git
  $ git clone https://github.com/apache/incubator-nuttx-apps.git
  $ cd nuttx
  $ make distclean
  $ ./tools/configure.sh arty_a7:nsh
  $ make V=1

4. Setup tftp server on your laptop, copy nuttx.bin to your tftpboot directory and change its name to boot.bin

5. Setup the wire connection(uart and tftp) between your board and laptop

6. Run  $ minicom -b 1000000 /dev/ttyUSB1 (the default baudrate on litex vexriscv is 1e6)
   when you see the bios prompt "litex>", type "netboot" and enter soon comes the nsh prompt

7. TODO

  Support GPIO/SPI/I2C/RTC/WDT/PWM
  Support RISC-V User mode