nuttx

History

Xiang Xiao 9473434587 Ensure the kernel component don't call userspace API Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>		2021-03-01 09:23:09 +09:00
..
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	Ensure the kernel component don't call userspace API	2021-03-01 09:23:09 +09:00
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