plat_dep.c

MANTIS是由科罗拉多大学开发的传感器网络嵌入式操作系统。 这是mantis的0.9.5版本的源码。

//  This file is part of MANTIS OS, Operating System
//  See http://mantis.cs.colorado.edu/
//
//  Copyright (C) 2003,2004,2005 University of Colorado, Boulder
//
//  This program is free software; you can redistribute it and/or
//  modify it under the terms of the mos license (see file LICENSE)

#include "plat_dep.h"

// last_sleep_time is declared in msched.c
extern uint16_t last_sleep_time;

handle_t mos_disable_ints(void)
{
   handle_t sreg;
   asm volatile ("mov.w r2, %0\n\t" : "=r"(sreg));
   dint();
   return sreg;
}

void kernel_timer_init(void)
{
   // src = ACLK, DIV = 1, INT = enabled, CLEAR
   TACTL = TASSEL_1 | ID_0 | TAIE | TACLR;

   // Rising Edge Capture, Synch, Capture Mode, INT = enabled
   TACCTL1 = CM1 | SCS | CAP | CCIE;
   TACCR1 = TIMESLICE_20_MS;
   TACCR0 = TIMESLICE_20_MS;

   // Enable timer, counting up to TACCR0 continuously
   TACTL |= MC_1;
}

void sleep_timer_init(void)
{
   // src = ACLK, DIV = 1, INT = enabled, 16bit, stopped
   TBCTL = TBSSEL_1 | ID_0 | TBIE | CNTL_0 | MC_0;
   // Rising Edge Capture, Synch, Capture Mode, INT = enabled
   TBCCTL1 = CM_1 | SCS | CAP | CCIE;
   
   TBCCR0 = 0xFFFF;
   TBCCR1 = 0xFFFF;

   last_sleep_time  = 0;
}