contiki/platform/mbxxx/clock.c

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/*
* Copyright (c) 2010, STMicroelectronics.
* 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. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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
*
*/
/*---------------------------------------------------------------------------*/
/**
* \file
* Clock for STM32W.
* \author
* Salvatore Pitrulli <salvopitru@users.sourceforge.net>
*/
/*---------------------------------------------------------------------------*/
/*
* File customized for mbxxx platform. It uses systick timer to control button
* status without interrupts, as well as for system clock.
*/
#include PLATFORM_HEADER
#include "hal/error.h"
#include "hal/hal.h"
#include "dev/stm32w-systick.h"
#include "sys/clock.h"
#include "sys/etimer.h"
#include "dev/button-sensor.h"
#include "uart1.h"
#include "dev/leds.h"
#include "dev/stm32w-radio.h"
#define DEBUG DEBUG_NONE
2013-12-10 07:48:58 +00:00
#include "net/ip/uip-debug.h"
// The value that will be load in the SysTick value register.
#define RELOAD_VALUE 24000-1 // 1 ms with a 24 MHz clock
static volatile clock_time_t count;
static volatile unsigned long current_seconds = 0;
static unsigned int second_countdown = CLOCK_SECOND;
/*---------------------------------------------------------------------------*/
void SysTick_Handler(void)
{
count++;
if(button_sensor.status(SENSORS_READY)){
button_sensor.value(0); // sensors_changed is called inside this function.
}
if(etimer_pending()) {
etimer_request_poll();
}
if (--second_countdown == 0) {
current_seconds++;
second_countdown = CLOCK_SECOND;
}
}
/*---------------------------------------------------------------------------*/
void clock_init(void)
{
ATOMIC(
//Counts the number of ticks.
count = 0;
SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);
SysTick_SetReload(RELOAD_VALUE);
SysTick_ITConfig(ENABLE);
SysTick_CounterCmd(SysTick_Counter_Enable);
)
}
/*---------------------------------------------------------------------------*/
clock_time_t clock_time(void)
{
return count;
}
/*---------------------------------------------------------------------------*/
/**
* Delay the CPU for a multiple of TODO
*/
void clock_delay(unsigned int i)
{
for (; i > 0; i--) { /* Needs fixing XXX */
unsigned j;
for (j = 50; j > 0; j--)
asm ("nop");
}
}
/*---------------------------------------------------------------------------*/
/**
* Wait for a multiple of 1 ms.
*
*/
void clock_wait(clock_time_t i)
{
clock_time_t start;
start = clock_time();
while(clock_time() - start < (clock_time_t)i);
}
/*---------------------------------------------------------------------------*/
unsigned long clock_seconds(void)
{
return current_seconds;
}
void sleep_seconds(int seconds)
{
uint32_t quarter_seconds = seconds * 4;
uint8_t radio_on;
halPowerDown();
radio_on = stm32w_radio_is_on();
stm32w_radio_driver.off();
halSleepForQsWithOptions(&quarter_seconds, 0);
ATOMIC(
halPowerUp();
// Update OS system ticks.
current_seconds += seconds - quarter_seconds / 4 ; // Passed seconds
count += seconds * CLOCK_SECOND - quarter_seconds * CLOCK_SECOND / 4 ;
if(etimer_pending()) {
etimer_request_poll();
}
SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);
SysTick_SetReload(RELOAD_VALUE);
SysTick_ITConfig(ENABLE);
SysTick_CounterCmd(SysTick_Counter_Enable);
)
stm32w_radio_driver.init();
if(radio_on){
stm32w_radio_driver.on();
}
uart1_init(115200);
leds_init();
rtimer_init();
PRINTF("WakeInfo: %04x\r\n", halGetWakeInfo());
}