You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

106 lines
2.0 KiB

/**
* Native CPU lpm.h implementation
*
* Uses system calls to emulate CPU power modes.
*
* Copyright (C) 2013 Ludwig Ortmann
*
* This file subject to the terms and conditions of the GNU General Public
* License. See the file LICENSE in the top level directory for more details.
*
* @ingroup lpm
* @ingroup native_cpu
* @{
* @file
* @author Ludwig Ortmann <ludwig.ortmann@fu-berlin.de>
* @}
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "lpm.h"
#include "debug.h"
static enum lpm_mode native_lpm;
void lpm_init(void)
{
DEBUG("lpm_init()\n");
native_lpm = LPM_ON;
return;
}
/**
* LPM_IDLE uses sleep() to wait for interrupts
* LPM_OFF exits process
* other modes not supported at the moment
*/
enum lpm_mode lpm_set(enum lpm_mode target)
{
enum lpm_mode last_lpm;
DEBUG("lpm_set(%i)\n", target);
last_lpm = native_lpm;
native_lpm = target;
switch(native_lpm) /* @contiki :-p */
{
case LPM_ON:
break;
case LPM_IDLE:
DEBUG("lpm_set(): pause()\n");
pause();
break;
/* XXX: unfinished modes: */
case LPM_SLEEP:
/*TODO: implement*/
printf("XXX: lpm_set(): LPM_SLEEP not implemented\n");
//sigsuspend();
case LPM_POWERDOWN:
/*TODO: implement*/
printf("XXX: lpm_set(): LPM_POWERDOWN not implemented\n");
//sigsuspend();
case LPM_OFF:
printf("lpm_set(): exit()\n");
exit(0);
break;
default:
DEBUG("XXX: unsupported power mode: %i\n", native_lpm);
exit(1);
}
return last_lpm;
}
void lpm_awake(void)
{
DEBUG("XXX: lpm_awake()\n");
native_lpm = LPM_ON;
return;
}
void lpm_begin_awake(void)
{
DEBUG("XXX: lpm_begin_awake()\n");
return;
}
void lpm_end_awake(void)
{
DEBUG("XXX: lpm_end_awake()\n");
native_lpm = LPM_ON;
return;
}
enum lpm_mode lpm_get(void)
{
return native_lpm;
}