nuttx

History

Matheus Castello 1bc3ab513d boards: risc-v: k210: Fix -march and -mabi -march=rv64gc -mabi=lp64 does not resolve lib paths for riscv64-unknown-elf-gcc resulting in lib not found errors. Changing it to -march=rv64imafc -mabi=lp64f that is the default used in Sipeed repositories. Signed-off-by: Matheus Castello <matheus@castello.eng.br>		2021-10-14 15:50:20 +09:00
..
configs	Rename CONFIG_LIB_BOARDCTL to CONFIG_BOARDCTL	2021-08-06 13:58:26 +02:00
include	boards: risc-v: Author Masayuki Ishikawa: Update license to Apache	2021-03-12 16:15:44 +08:00
kernel	Rename LIB_ to LIBC_ for all libc Kconfig	2021-08-05 19:45:24 +02:00
scripts	boards: risc-v: k210: Fix -march and -mabi	2021-10-14 15:50:20 +09:00
src	Rename CONFIG_LIB_BOARDCTL to CONFIG_BOARDCTL	2021-08-06 13:58:26 +02:00
Kconfig
README-qemu.txt	sched/task: delete CONFIG_MAX_TASKS limit	2021-07-11 19:42:30 -07:00
README.txt	boards: maix-bit: Update README.txt with updated clone path	2021-05-25 01:37:28 -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
  $ export PATH=$PATH:/$TOOL_CHAIN_PATH/bin

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