421fbfae25
Instead of using a separate data structure to request that a PD remain powered during deep sleep, we do the same within the main LPM data structure through an additional field. This allows us to maintain only one linked list of LPM modules and overall improves code clarity
135 lines
4.7 KiB
C
135 lines
4.7 KiB
C
/*
|
|
* Copyright (c) 2014, Texas Instruments Incorporated - http://www.ti.com/
|
|
* 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 copyright holder 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 COPYRIGHT HOLDERS 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
|
|
* COPYRIGHT HOLDER 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.
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* \addtogroup sensortag-cc26xx-buzzer
|
|
* @{
|
|
*
|
|
* \file
|
|
* Driver for the Sensortag-CC26XX Buzzer
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
#include "contiki-conf.h"
|
|
#include "buzzer.h"
|
|
#include "ti-lib.h"
|
|
#include "lpm.h"
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
/*---------------------------------------------------------------------------*/
|
|
static uint8_t buzzer_on;
|
|
LPM_MODULE(buzzer_module, NULL, NULL, NULL, LPM_DOMAIN_PERIPH);
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
buzzer_init()
|
|
{
|
|
buzzer_on = 0;
|
|
|
|
/* Drive the I/O ID with GPT0 / Timer A */
|
|
ti_lib_ioc_port_configure_set(BOARD_IOID_BUZZER, IOC_PORT_MCU_PORT_EVENT0,
|
|
IOC_STD_OUTPUT);
|
|
|
|
/* GPT0 / Timer A: PWM, Interrupt Enable */
|
|
HWREG(GPT0_BASE + GPT_O_TAMR) = (TIMER_CFG_A_PWM & 0xFF) | GPT_TAMR_TAPWMIE;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
uint8_t
|
|
buzzer_state()
|
|
{
|
|
return buzzer_on;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
buzzer_start(int freq)
|
|
{
|
|
uint32_t load;
|
|
|
|
buzzer_on = 1;
|
|
|
|
/*
|
|
* Register ourself with LPM. This will keep the PERIPH PD powered on
|
|
* during deep sleep, allowing the buzzer to keep working while the chip is
|
|
* being power-cycled
|
|
*/
|
|
lpm_register_module(&buzzer_module);
|
|
|
|
/* Stop the timer */
|
|
ti_lib_timer_disable(GPT0_BASE, TIMER_A);
|
|
|
|
if(freq > 0) {
|
|
load = (GET_MCU_CLOCK / freq);
|
|
|
|
ti_lib_timer_load_set(GPT0_BASE, TIMER_A, load);
|
|
ti_lib_timer_match_set(GPT0_BASE, TIMER_A, load / 2);
|
|
|
|
/* Start */
|
|
ti_lib_timer_enable(GPT0_BASE, TIMER_A);
|
|
}
|
|
|
|
/* Run in sleep mode */
|
|
ti_lib_prcm_peripheral_sleep_enable(PRCM_PERIPH_TIMER0);
|
|
ti_lib_prcm_peripheral_deep_sleep_enable(PRCM_PERIPH_TIMER0);
|
|
ti_lib_prcm_load_set();
|
|
while(!ti_lib_prcm_load_get());
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
buzzer_stop()
|
|
{
|
|
buzzer_on = 0;
|
|
|
|
/*
|
|
* Unregister the buzzer module from LPM. This will effectively release our
|
|
* lock for the PERIPH PD allowing it to be powered down (unless some other
|
|
* module keeps it on)
|
|
*/
|
|
lpm_unregister_module(&buzzer_module);
|
|
|
|
/* Stop the timer */
|
|
ti_lib_timer_disable(GPT0_BASE, TIMER_A);
|
|
|
|
/*
|
|
* Stop running in sleep mode.
|
|
* ToDo: Currently GPT0 is in use by clock_delay_usec (GPT0/TB) and by this
|
|
* module here (GPT0/TA). clock_delay_usec will never need GPT0/TB in sleep
|
|
* mode and we control TA here. Thus, with the current setup, it's OK to
|
|
* control whether GPT0 runs in sleep mode in this module here. However, if
|
|
* some other module at some point starts using GPT0, we should change this
|
|
* to happen through an umbrella module
|
|
*/
|
|
ti_lib_prcm_peripheral_sleep_disable(PRCM_PERIPH_TIMER0);
|
|
ti_lib_prcm_peripheral_deep_sleep_disable(PRCM_PERIPH_TIMER0);
|
|
ti_lib_prcm_load_set();
|
|
while(!ti_lib_prcm_load_get());
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @} */
|