nuttx

History

chao.an 64d7326ed5 compile/opt: add config DEBUG_OPT_UNUSED_SECTIONS Enable this option to optimization the unused input sections with the linker by compiling with " -ffunction-sections -fdata-sections ", and linking with " --gc-sections ". Signed-off-by: chao.an <anchao@xiaomi.com>		2022-04-22 01:37:23 +08:00
..
configs/nsh	sched: Disable pthread by default when DEFAULT_SMALL is enabled	2022-02-07 12:04:03 +08:00
include	Add support for Litex VexRiscV.	2020-03-21 06:01:56 +00:00
scripts	compile/opt: add config DEBUG_OPT_UNUSED_SECTIONS	2022-04-22 01:37:23 +08:00
src	arch/risc-v: Remove FAR from chip and board folder	2022-04-19 00:22:45 +03:00
Kconfig	boards/risc-v/litex/arty_a7: add SDCARD support for the Arty_A7 board	2022-03-30 02:35:27 +08:00
README.txt	boards/risc-v/litex/arty_a7: update README to include building in LITESDCARD peripheral	2022-03-30 02:35:27 +08:00

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

  $ cd litex-boards/litex_boards/targets
  $ ./digilent_arty.py --with-sdcard --uart-baudrate 1000000 --cpu-type=vexriscv --cpu-variant=secure --build --load --flash

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