02-IoT-workshop-mrubyc-posix-hello_world.md

clone template

git clone https://github.com/hasumikin/mrubyc-template-posix.git 02
cd 02

edit source

• create mrblib/loops/master.rb
• create mrblib/models/greeter.rb
• edit main.c (you can replace whole of the file with code below)

build and run

make
./main

greeter.rb

# mrblib/models/greeter.rb

class Greeter
  def greet
    puts "Hello World!"
  end
end

main.c

/* main.c */

#include "mrubyc_src/mrubyc.h"

#include <stdio.h>
#include <stdlib.h>

#include "src/models/greeter.c"
#include "src/loops/master.c"

#define MEMORY_SIZE (1024*40)
static uint8_t my_memory_pool[MEMORY_SIZE];

int main(void) {
  mrbc_init(my_memory_pool, MEMORY_SIZE);

  mrbc_create_task( greeter, 0 );
  mrbc_create_task( master, 0 );
  mrbc_run();

  return 0;
}

master.rb

# mrblib/loops/master.rb

greeter = Greeter.new

while true
  greeter.greet
  sleep 1
end