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d05b9a9c79
nuttx/boards/risc-v/k210/maix-bit
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zhanghu6 d05b9a9c79 note dump: add CONFIG_SCHED_INSTRUMENTATION_SWITCH 
1. If CONFIG_SCHED_INSTRUMENTATION_SWITCH is enabled, then these additional interfaces are expected:
        sched_note_suspend
        sched_note_resume
at the same time，If CONFIG_SMP is enabled，then expected：
        sched_note_cpu_pause
        sched_note_cpu_paused
        sched_note_cpu_resume
        sched_note_cpu_resumed
2. other board if enable SCHED_INSTRUMENTATION，SCHED_INSTRUMENTATION_SWITCH to defconfig.
2021-12-15 07:07:00 -06:00
..
configs note dump: add CONFIG_SCHED_INSTRUMENTATION_SWITCH 2021-12-15 07:07:00 -06:00
include boards: k210: Add initial gpio user space support 2021-10-17 17:29:59 +09:00
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 boards: k210: Add initial gpio user space support 2021-10-17 17:29:59 +09:00
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