nuttx

History

liuhaitao 459ad99373 Use EXTRAFLAGS instead of EXTRADEFINES to be used by make via command line So call 'make EXTRAFLAGS=-Wno-cpp' could suppress the warnings with pre-processor directive #warning in GCC. Change-Id: Iaa618238924c9969bf91db22117b39e6d2fc9bb6 Signed-off-by: liuhaitao <liuhaitao@xiaomi.com>		2020-04-11 08:31:08 -06:00
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configs/nsh
include
scripts	Use EXTRAFLAGS instead of EXTRADEFINES to be used by make via command line	2020-04-11 08:31:08 -06:00
src
Kconfig
README.txt

README.txt

1. Download and install toolchain

  $ 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. Follow instruction on https://github.com/enjoy-digital/litex to build the vexriscv softcore fpga gateware
   and flash to arty_a7 board

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 arty_a7:nsh
  $ make V=1

4. Setup tftp server on your laptop, copy nuttx.bin to your tftpboot directory and change its name to boot.bin

5. Setup the wire connection(uart and tftp) between your board and laptop

6. Run  $ minicom -b 1000000 /dev/ttyUSB1 (the default baudrate on litex vexriscv is 1e6)
   when you see the bios prompt "litex>", type "netboot" and enter soon comes the nsh prompt

7. TODO

  Support GPIO/SPI/I2C/RTC/WDT/PWM
  Support RISC-V User mode