/*
 * File      : main.c
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2018-08-16     armink       first implementation
 */

#include <rtthread.h>
#include <rtdevice.h>

//#include "stackdepth.h"

#define LED_PIN	3 


#define THREAD_STACK_SIZE 2048	
#define THREAD_PRIORITY		3	
#define THREAD_TIMESLICE	200
void thread3_entry(void* param);
int main(void)
{ 
		rt_thread_t thread2 = rt_thread_create( "Thread3", thread3_entry, RT_NULL, 
			THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE); 
    return 0;
}


void thread3_entry(void* param)
{
	while(1)
	{
	}
}

register unsigned int *_psp     __asm("psp");
 
unsigned int *getsp()
{
	unsigned int *p =NULL;
	p = _psp;
	return p;
}

int add(int i, int j)
{ 
  int res = 0; 
	__asm
  (
    "ADD res, i, j \t\n" 
  );  
	//res = i+j;
  return res; 
}



int led(void)
{
		int a = 1;
		int b = 2;
		int c = 0;
	
		unsigned int *ppp = NULL;
	 
    rt_uint8_t count;

    rt_pin_mode(LED_PIN, PIN_MODE_OUTPUT);  
    
    for(count = 0 ; count < 10 ;count++) 
    {       
        rt_pin_write(LED_PIN, PIN_HIGH);
        //rt_kprintf("led on, count : %d\r\n", count);
        //rt_thread_mdelay(500);
        rt_thread_mdelay(50);
        
        rt_pin_write(LED_PIN, PIN_LOW);
        //rt_kprintf("led off\r\n");
        //rt_thread_mdelay(500);
        rt_thread_mdelay(50);
    } 
		c = add(a,b);
 
		ppp = getsp();
		c = *ppp;
	  rt_kprintf("c value : %d\r\n", c);
    return c;
}
MSH_CMD_EXPORT(led, RT-Thread first led sample);