nes-proj/cpu/mc1322x/tests/sleep.c

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/*
* Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
* to the MC1322x project (http://mc1322x.devl.org)
* 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 libmc1322x: see http://mc1322x.devl.org
* for details.
*
* $Id: sleep.c,v 1.1 2010/06/10 14:55:39 maralvira Exp $
*/
#include <mc1322x.h>
#include <board.h>
#include "tests.h"
#include "config.h"
void main(void) {
uart_init(INC,MOD,SAMP);
*mem32(0x00401ffc) = 0x01234567;
*mem32(0x00407ffc) = 0xdeadbeef;
*mem32(0x0040fffc) = 0xface00ff;
*mem32(0x00410000) = 0xabcd0123;
putstr("sleep test\n\r");
putstr("0x00401ffc: ");
put_hex32(*mem32(0x00401ffc));
putstr("\r\n");
putstr("0x00407ffc: ");
put_hex32(*mem32(0x00407ffc));
putstr("\r\n");
putstr("0x0040fffc: ");
put_hex32(*mem32(0x0040fffc));
putstr("\r\n");
putstr("0x00410000: ");
put_hex32(*mem32(0x00410000));
putstr("\r\n");
/* radio must be OFF before sleeping */
/* otherwise MCU will not wake up properly */
/* this is undocumented behavior */
// radio_off();
#if USE_32KHZ
/* turn on the 32kHz crystal */
putstr("enabling 32kHz crystal\n\r");
/* you have to hold it's hand with this on */
/* once you start the 32xHz crystal it can only be stopped with a reset (hard or soft) */
/* first, disable the ring osc */
clear_bit(*CRM_RINGOSC_CNTL,0);
/* enable the 32kHZ crystal */
set_bit(*CRM_XTAL32_CNTL,0);
/* 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 */
set_bit(*CRM_SYS_CNTL,5);
{
static volatile uint32_t old;
old = *CRM_RTC_COUNT;
putstr("waiting for xtal\n\r");
while(*CRM_RTC_COUNT == old) {
continue;
}
/* RTC has started up */
set_bit(*CRM_SYS_CNTL,5);
putstr("32kHZ xtal started\n\r");
}
#endif
/* go to sleep */
// *CRM_WU_CNTL = 0; /* don't wake up */
*CRM_WU_CNTL = 0x1; /* enable wakeup from wakeup timer */
// *CRM_WU_TIMEOUT = 1875000; /* wake 10 sec later if doze */
#if USE_32KHZ
*CRM_WU_TIMEOUT = 327680*2;
#else
*CRM_WU_TIMEOUT = 20000; /* wake 10 sec later if hibernate ring osc */
#endif
/* hobby board: 2kHz = 11uA; 32kHz = 11uA */
// *CRM_SLEEP_CNTL = 1; /* hibernate, RAM page 0 only, don't retain state, don't power GPIO */ /* approx. 2kHz = 2.0uA */
/* hobby board: 2kHz = 18uA; 32kHz = 19uA */
// *CRM_SLEEP_CNTL = 0x41; /* hibernate, RAM page 0 only, retain state, don't power GPIO */ /* approx. 2kHz = 10.0uA */
/* hobby board: 2kHz = 20uA; 32kHz = 21uA */
// *CRM_SLEEP_CNTL = 0x51; /* hibernate, RAM page 0&1 only, retain state, don't power GPIO */ /* approx. 2kHz = 11.7uA */
/* hobby board: 2kHz = 22uA; 32kHz = 22.5uA */
// *CRM_SLEEP_CNTL = 0x61; /* hibernate, RAM page 0,1,2 only, retain state, don't power GPIO */ /* approx. 2kHz = 13.9uA */
/* hobby board: 2kHz = 24uA; 32kHz = 25uA */
*CRM_SLEEP_CNTL = 0x71; /* hibernate, all RAM pages, retain state, don't power GPIO */ /* approx. 2kHz = 16.1uA */
// *CRM_SLEEP_CNTL = 0xf1; /* hibernate, all RAM pages, retain state, power GPIO */ /* consumption depends on GPIO hookup */
// *CRM_SLEEP_CNTL = 2; /* doze , RAM page 0 only, don't retain state, don't power GPIO */ /* approx. 69.2 uA */
// *CRM_SLEEP_CNTL = 0x42; /* doze , RAM page 0 only, retain state, don't power GPIO */ /* approx. 77.3uA */
// *CRM_SLEEP_CNTL = 0x52; /* doze , RAM page 0&1 only, retain state, don't power GPIO */ /* approx. 78.9uA */
// *CRM_SLEEP_CNTL = 0x62; /* doze , RAM page 0,1,2 only, retain state, don't power GPIO */ /* approx. 81.2uA */
// *CRM_SLEEP_CNTL = 0x72; /* doze , all RAM pages, retain state, don't power GPIO */ /* approx. 83.4uA - possibly with periodic refresh*/
// *CRM_SLEEP_CNTL = 0xf2; /* doze , all RAM pages, retain state, power GPIO */ /* consumption depends on GPIO hookup */
/* wait for the sleep cycle to complete */
while((*CRM_STATUS & 0x1) == 0) { continue; }
/* write 1 to sleep_sync --- this clears the bit (it's a r1wc bit) and powers down */
*CRM_STATUS = 1;
/* asleep */
/* wait for the awake cycle to complete */
while((*CRM_STATUS & 0x1) == 0) { continue; }
/* write 1 to sleep_sync --- this clears the bit (it's a r1wc bit) and finishes wakeup */
*CRM_STATUS = 1;
putstr("\n\r\n\r\n\r");
putstr("0x00401ffc: ");
put_hex32(*mem32(0x00401ffc));
putstr("\r\n");
putstr("0x00407ffc: ");
put_hex32(*mem32(0x00407ffc));
putstr("\r\n");
putstr("0x0040fffc: ");
put_hex32(*mem32(0x0040fffc));
putstr("\r\n");
putstr("0x00410000: ");
put_hex32(*mem32(0x00410000));
putstr("\r\n");
*GPIO_PAD_DIR0 = LED_RED;
#define DELAY 400000
volatile uint32_t i;
while(1) {
*GPIO_DATA0 = LED_RED;
for(i=0; i<DELAY; i++) { continue; }
*GPIO_DATA0 = 0;
for(i=0; i<DELAY; i++) { continue; }
};
}