nuttx

History

Xiang Xiao b932b653dd arch: Select 64bit elf base on the architecture characteristic Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com> Change-Id: I09eec5a76f255016a910cfec3b3f70cd7577525e		2020-05-31 21:38:32 -07:00
..
configs	arch: Select 64bit elf base on the architecture characteristic	2020-05-31 21:38:32 -07:00
include	Remove exra whitespace from files (#189 )	2020-01-31 09:24:49 -06:00
kernel	build: Move BOARD_DIR definition to common place	2020-05-24 20:20:12 +01:00
scripts	boards: Leverage PR 1150 to all remaining board Make.defs	2020-05-31 16:11:07 +01:00
src	build: Move .config check to the top Makefile	2020-05-20 17:57:34 +01:00
Kconfig
README-qemu.txt	boards: maix-bit: Update instructions for kostest	2020-04-22 13:45:56 +08:00
README.txt	boards: maix-bit: Add descriptions on how to write nuttx.bin to SPI-Flash	2020-05-05 17:21:32 -07:00

README.txt

1. Download and install toolchain and openocd-k210

  $ 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. Build openocd-k210

  $ git clone https://github.com/kendryte/openocd-kendryte
  $ cd openocd-kendryte
  $ ./bootstrap & ./configure & make

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 maix-bit:nsh
  $ make V=1

4. Download and run the nuttx from SRAM (not SPI-Flash)

  $ picocom -b 115200 /dev/ttyUSB0
  $ sudo ./src/openocd -s ./tcl -f ./tcl/kendryte.cfg -m 0
  $ riscv64-unknown-elf-gdb ./nuttx
  (gdb) target extended-remote :3333
  (gdb) load nuttx
  (gdb) c

5. Write nuttx.bin to SPI-Flash

  $ pip3 install kflash
  $ kflash -p /dev/ttyUSB0 -b 1500000 ./nuttx/nuttx.bin

6. TODO

  Support peripherals such as GPIO/SPI/I2C/...
  Support FPU
  Support memory protection for user mode