nuttx

History

Kurun 6fd80289f9 Fix git clone repository		2021-01-20 22:35:59 +09:00
..
configs	libc/stdio: Allocate file_struct dynamically	2020-09-11 17:58:17 +08:00
include	boards/risc-v/k210/maix-bit: Add initial autoled support	2020-06-08 10:53:29 +09:00
kernel	sched: Rename task_startup to nxtask_startup	2020-07-01 07:55:33 -06:00
scripts	make/expression: improving up asm/C/C++ compile times	2020-11-02 07:53:53 -08:00
src	boards/risc-v/k210/maix-bit: Add initial autoled support	2020-06-08 10:53:29 +09:00
Kconfig
README-qemu.txt	Fix git clone repository	2021-01-20 22:35:59 +09:00
README.txt	Fix git clone repository	2021-01-20 22:35:59 +09:00

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

6. TODO

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