mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-12-23 01:29:33 +00:00
1145fa9ba9
based on commit aac3a355451d899f02737f2907af8c874ee4feba of git://git.devl.org/git/malvira/contiki-mc1322x.git
122 lines
4.2 KiB
C
122 lines
4.2 KiB
C
/*
|
|
* Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
|
|
* to the MC1322x project (http://mc1322x.devl.org) and Contiki.
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* This file is part of the Contiki OS.
|
|
*
|
|
* $Id: contiki-crm.c,v 1.1 2010/06/09 14:43:22 maralvira Exp $
|
|
*/
|
|
|
|
#include "mc1322x.h"
|
|
|
|
#define CRM_DEBUG 1
|
|
#if CRM_DEBUG
|
|
#define PRINTF(...) printf(__VA_ARGS__)
|
|
#else
|
|
#define PRINTF(...)
|
|
#endif
|
|
|
|
uint32_t cal_rtc_secs; /* calibrated 2khz rtc seconds */
|
|
|
|
void sleep(uint32_t opts, uint32_t mode)
|
|
{
|
|
|
|
/* the maca must be off before going to sleep */
|
|
/* otherwise the mcu will reboot on wakeup */
|
|
// maca_off();
|
|
*CRM_SLEEP_CNTL = opts;
|
|
*CRM_SLEEP_CNTL = (opts | mode);
|
|
|
|
/* wait for the sleep cycle to complete */
|
|
while(!bit_is_set(*CRM_STATUS,0)) { continue; }
|
|
/* write 1 to sleep_sync --- this clears the bit (it's a r1wc bit) and powers down */
|
|
set_bit(*CRM_STATUS,0);
|
|
|
|
/* now we are asleep */
|
|
/* and waiting for something to wake us up */
|
|
/* you did tell us how to wake up right? */
|
|
|
|
/* waking up */
|
|
while(!bit_is_set(*CRM_STATUS,0)) { continue; }
|
|
/* write 1 to sleep_sync --- this clears the bit (it's a r1wc bit) and finishes the wakeup */
|
|
set_bit(*CRM_STATUS,0);
|
|
|
|
/* you may also need to do other recovery */
|
|
/* such as interrupt handling */
|
|
/* peripheral init */
|
|
/* and turning the radio back on */
|
|
|
|
}
|
|
|
|
/* turn on the 32kHz crystal */
|
|
/* once you start the 32xHz crystal it can only be stopped with a reset (hard or soft) */
|
|
void enable_32khz_xtal(void)
|
|
{
|
|
static volatile uint32_t rtc_count;
|
|
PRINTF("enabling 32kHz crystal\n\r");
|
|
/* first, disable the ring osc */
|
|
ring_osc_off();
|
|
/* enable the 32kHZ crystal */
|
|
xtal32_on();
|
|
|
|
/* set the XTAL32_EXISTS bit */
|
|
/* the datasheet says to do this after you've check that RTC_COUNT is changing */
|
|
/* the datasheet is not correct */
|
|
xtal32_exists();
|
|
|
|
/* now check that the crystal starts */
|
|
/* this blocks until it starts */
|
|
/* it would be better to timeout and return an error */
|
|
rtc_count = *CRM_RTC_COUNT;
|
|
PRINTF("waiting for xtal\n\r");
|
|
while(*CRM_RTC_COUNT == rtc_count) {
|
|
continue;
|
|
}
|
|
/* RTC has started up */
|
|
PRINTF("32kHZ xtal started\n\r");
|
|
|
|
}
|
|
|
|
void cal_ring_osc(void)
|
|
{
|
|
uint32_t cal_factor;
|
|
PRINTF("performing ring osc cal\n\r");
|
|
PRINTF("crm_status: 0x%0x\n\r",*CRM_STATUS);
|
|
PRINTF("sys_cntl: 0x%0x\n\r",*CRM_SYS_CNTL);
|
|
*CRM_CAL_CNTL = (1<<16) | (20000);
|
|
while((*CRM_STATUS & (1<<9)) == 0);
|
|
PRINTF("ring osc cal complete\n\r");
|
|
PRINTF("cal_count: 0x%0x\n\r",*CRM_CAL_COUNT);
|
|
cal_factor = (REF_OSC*1000) / *CRM_CAL_COUNT;
|
|
cal_rtc_secs = (NOMINAL_RING_OSC_SEC * cal_factor)/100;
|
|
PRINTF("cal factor: %d\n\r", cal_factor);
|
|
PRINTF("hib_wake_secs: %d\n\r", cal_rtc_secs);
|
|
set_bit(*CRM_STATUS,9);
|
|
}
|