nuttx

History

Gregory Nutt bb9b58bdde libc: Move pthread_create to user space Signed-off-by: Huang Qi <huangqi3@xiaomi.com> Change-Id: I5c447d94077debc79158686935f288e4c8e51e01		2021-05-21 22:46:52 -06:00
..
configs	board: Enable CONFIG_BOARDCTL_ROMDISK	2021-05-13 10:44:16 -05:00
include	boards: risc-v: Author Masayuki Ishikawa: Update license to Apache	2021-03-12 16:15:44 +08:00
kernel	libc: Move pthread_create to user space	2021-05-21 22:46:52 -06:00
scripts	boards: maix-bit: Add _default_stack_limit to the linker script	2021-04-19 01:09:22 -05:00
src	boards: risc-v: Author Masayuki Ishikawa: Update license to Apache	2021-03-12 16:15:44 +08:00
Kconfig
README-qemu.txt	Fix git clone repository	2021-01-20 22:35:59 +09:00
README.txt	boards: maix-bit: Add knsh_smp	2021-04-09 03:12:50 -05:00

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://github.com/apache/incubator-nuttx.git
  $ git clone https://github.com/apache/incubator-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

  NOTE: The kflash_gui is not recommended because it's unstable

6. TODO

  Support peripherals such as GPIO/SPI/I2C/...
  Support FPU
  Support RISC-V U-mode including memory protection