nuttx

History

Xiang Xiao a0ce81d659 sched/wdog: Don't dynamically allocate wdog_s to save the preserved space(1KB) and also avoid the heap overhead Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com> Change-Id: I694073f68e1bd63960cedeea1ddec441437be025		2020-08-11 12:28:55 -06:00
..
configs/nsh	sched/wdog: Don't dynamically allocate wdog_s	2020-08-11 12:28:55 -06:00
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