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add "hello_nim" example application written by Nim.
Signed-off-by: Takeyoshi Kikuchi <[email protected]>
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‎config.nims‎

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############################################################################
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# apps/config.nims
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership. The
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# ASF licenses this file to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance with the
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# License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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############################################################################
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import std/os
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import std/strutils
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switch "os", "nuttx"
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switch "mm", "orc"
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switch "arm.nuttx.gcc.exe", "arm-none-eabi-gcc"
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switch "arm64.nuttx.gcc.exe", "aarch64-none-elf-gcc"
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switch "riscv32.nuttx.gcc.exe", "riscv64-unknown-elf-gcc"
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switch "amd64.nuttx.gcc.exe", "x86_64-linux-gnu-gcc"
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switch "nimcache", ".nimcache"
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switch "d", "useStdLib"
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switch "d", "useMalloc"
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switch "d", "nimAllocPagesViaMalloc"
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switch "d", "noSignalHandler"
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switch "threads", "off"
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switch "noMain", "on"
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switch "compileOnly", "on"
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switch "noLinking", "on"
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# TODO: need OpenSSL-mbedTLS wrapper library.
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#switch "d", "ssl"
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#swich "dynlibOverride", "ssl"
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type
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OptFlag = enum
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oNone
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oSize
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DotConfig = object
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arch: string
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opt: OptFlag
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debugSymbols: bool
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ramSize: int
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isSim: bool
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proc killoBytes(bytes: int): int =
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result = (bytes / 1024).int
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proc read_config(cfg: string): DotConfig =
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for line in cfg.readFile.splitLines:
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if not line.startsWith("CONFIG_"):
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continue
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let keyval = line.replace("CONFIG_", "").split("=")
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if keyval.len != 2:
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continue
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case keyval[0]
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of "ARCH":
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let arch = keyval[1].strip(chars = {'"'})
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case arch
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of "arm", "arm64":
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result.arch = arch
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of "riscv":
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result.arch = "riscv32"
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of "sim":
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if defined(amd64):
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result.arch = "amd64"
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elif defined(aarch64):
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result.arch = "arm64"
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result.isSim = true
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of "DEBUG_NOOPT":
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result.opt = oNone
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of "DEBUG_FULLOPT":
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result.opt = oSize
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of "DEBUG_SYMBOLS":
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result.debugSymbols = true
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of "RAM_SIZE":
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result.ramSize = keyval[1].parseInt
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echo "* arch: " & result.arch
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echo "* opt: " & $result.opt
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echo "* debug: " & $result.debugSymbols
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echo "* ramSize: " & $result.ramSize
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func bool2onoff(b: bool): string =
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result = if b: "on" else: "off"
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proc setup_cfg(cfg: DotConfig) =
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switch("cpu", cfg.arch)
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if cfg.opt == oSize:
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switch("define", "release")
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switch("define", "danger")
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switch("opt", "size")
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if cfg.debugSymbols:
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# use native debugger (gdb)
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switch("debugger", "native")
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let debug_onoff = cfg.debugSymbols.bool2onoff
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switch("lineDir", debug_onoff)
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switch("stackTrace", debug_onoff)
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switch("lineTrace", debug_onoff)
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if not cfg.isSim:
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# Adjust the page size for Nim's GC allocator.
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let ramKilloBytes = cfg.ramSize.killoBytes
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if ramKilloBytes < 32:
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switch("define", "nimPage256")
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elif ramKilloBytes < 512:
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switch("define", "nimPage512")
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elif ramKilloBytes < 2048:
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switch("define", "nimPage1k")
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if ramKilloBytes < 512:
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# Sets MemAlign to 4 bytes which reduces the memory alignment
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# to better match some embedded devices.
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switch("define", "nimMemAlignTiny")
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let topdir = getEnv("TOPDIR")
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let cfg = read_config(topdir & "/.config")
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cfg.setup_cfg()

‎examples/hello_nim/.gitignore‎

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.nimcache/
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.nimc

‎examples/hello_nim/Kconfig‎

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#
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# For a description of the syntax of this configuration file,
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# see the file kconfig-language.txt in the NuttX tools repository.
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#
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config EXAMPLES_HELLO_NIM
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tristate "\"Hello, World!\" example (Nim)"
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default n
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---help---
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Enable the \"Hello, World!\" example
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if EXAMPLES_HELLO_NIM
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config EXAMPLES_HELLO_NIM_PROGNAME
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string "Program name"
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default "hello_nim"
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---help---
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This is the name of the program that will be used when the NSH ELF
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program is installed.
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config EXAMPLES_HELLO_NIM_PRIORITY
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int "Hello task priority"
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default 100
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config EXAMPLES_HELLO_NIM_STACKSIZE
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int "Hello stack size"
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default DEFAULT_TASK_STACKSIZE
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endif

‎examples/hello_nim/Make.defs‎

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############################################################################
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# apps/examples/hello_nim/Make.defs
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership. The
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# ASF licenses this file to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance with the
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# License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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############################################################################
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ifneq ($(CONFIG_EXAMPLES_HELLO_NIM),)
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CONFIGURED_APPS += $(APPDIR)/examples/hello_nim
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endif

‎examples/hello_nim/Makefile‎

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############################################################################
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# apps/examples/hello_nim/Make.defs
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership. The
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# ASF licenses this file to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance with the
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# License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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############################################################################
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include $(APPDIR)/Make.defs
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# Hello, World! (Nim) built-in application info
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PROGNAME = $(CONFIG_EXAMPLES_HELLO_NIM_PROGNAME)
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PRIORITY = $(CONFIG_EXAMPLES_HELLO_NIM_PRIORITY)
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STACKSIZE = $(CONFIG_EXAMPLES_HELLO_NIM_STACKSIZE)
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MODULE = $(CONFIG_EXAMPLES_HELLO_NIM)
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# Hello, World! Example
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NIMPATH = $(shell choosenim show path)
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CFLAGS += -I $(NIMPATH)/lib -I ./.nimcache
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CSRCS += $(wildcard .nimcache/*.c)
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MAINSRC = hello_nim_main.c
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.nimc: hello_nim_async.nim
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nim c --header $<
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touch .nimc
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$(MAINSRC): .nimc
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clean::
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$(call DELDIR, .nimcache)
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$(call DELFILE, .nimc)
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all:: .nimc $(MAINSRC)
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include $(APPDIR)/Application.mk

‎examples/hello_nim/hello_nim_async.nim‎

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import std/asyncdispatch
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import std/strformat
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proc task(id: int): Future[void] {.async.} =
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for loop in 0..2:
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echo &"Hello from task {id}! loops: {loop}"
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if loop < 2:
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await sleepAsync(1000)
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proc launch() {.async.} =
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for id in 1..2:
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asyncCheck task(id)
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await sleepAsync(200)
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await task(3)
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proc hello_nim() {.exportc, cdecl.} =
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waitFor launch()
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GC_runOrc()

‎examples/hello_nim/hello_nim_main.c‎

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/****************************************************************************
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* apps/examples/hello_nim/hello_nim_main.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include "hello_nim_async.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* hello_main
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****************************************************************************/
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int main(int argc, FAR char *argv[])
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{
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NimMain();
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hello_nim();
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return 0;
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}

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