nuttx

History

Xiang Xiao b0797263ca libc/stdio: Allocate file_struct dynamically 1.Reduce the default size of task_group_s(~512B each task) 2.Scale better between simple and complex application Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com> Change-Id: Ia872137504fddcf64d89c48d6f0593d76d582710		2020-09-11 17:58:17 +08:00
..
configs/nsh	libc/stdio: Allocate file_struct dynamically	2020-09-11 17:58:17 +08:00
include	Add support for Litex VexRiscV.	2020-03-21 06:01:56 +00:00
scripts	boards: Move toolchain related variables to Toolchain.defs	2020-07-20 17:10:37 +01:00
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	Add support for Litex VexRiscV.	2020-03-21 06:01:56 +00:00

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://bitbucket.org/nuttx/nuttx.git
  $ git clone https://bitbucket.org/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