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Add support for the RE-Mote on-board power management feature

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This commit is contained in:
Antonio Lignan 2015-12-16 18:57:28 +01:00
parent 641599f613
commit 5e14c22c98
6 changed files with 619 additions and 13 deletions
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8
examples/zolertia/zoul/power-mgmt/Makefile Normal file
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CONTIKI_PROJECT = test-power-mgmt
TARGET = zoul
all: $(CONTIKI_PROJECT)
CONTIKI = ../../../..
include $(CONTIKI)/Makefile.include

195
examples/zolertia/zoul/power-mgmt/test-power-mgmt.c Normal file
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/*
* Copyright (c) 2015, Zolertia - http://www.zolertia.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 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.
*
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup remote-examples
* @{
*
* \defgroup remote-power-management-test RE-Mote power management example
*
* Test the RE-Mote's power management features, shutdown mode and battery
* management
*
* @{
*
* \author
* Antonio Lignan <alinan@zolertia.com>
* Aitor Mejias <amejias@zolertia.com>
*/
/*---------------------------------------------------------------------------*/
#include "contiki.h"
#include "cpu.h"
#include "sys/etimer.h"
#include "sys/process.h"
#include "dev/leds.h"
#include "dev/sys-ctrl.h"
#include "dev/gpio.h"
#include "lib/list.h"
#include "power-mgmt.h"
#include <stdio.h>
#include <stdint.h>
/*---------------------------------------------------------------------------*/
/* RE-Mote revision A */
#define PM_EXPECTED_VERSION 0x00
#define ENTER_SHUTDOWN_COUNT 10
/*---------------------------------------------------------------------------*/
PROCESS(test_remote_pm, "RE-Mote Power Management Test");
AUTOSTART_PROCESSES(&test_remote_pm);
/*---------------------------------------------------------------------------*/
static struct etimer et;
/*---------------------------------------------------------------------------*/
static char *
print_pm(uint8_t state)
{
switch(state) {
case PM_SYSOFF_ON:
return "Battery on";
case PM_SYSOFF_OFF:
return "Battery off";
case PM_TIMER_ENABLED:
return "Nano Timer enabled";
case PM_TIMER_DISABLED:
return "Nano Timer disabled";
case PM_AWAITING_RTC_EVENT:
return "Awaiting RTC event";
default:
return "UNKNOWN";
}
}
/*---------------------------------------------------------------------------*/
static int8_t
get_status(uint8_t mask, uint8_t *val)
{
uint8_t status, print_msg;
/* Retrieve the status of the power management block */
if(pm_get_state(&status) != PM_SUCCESS) {
printf("Failed to retrieve the power management status\n");
return PM_ERROR;
}
if(!mask) {
printf("STATUS %u\n", status);
*val = PM_IDLE;
return PM_SUCCESS;
}
/* Read back ony the requested status bit */
switch(mask) {
case PM_SYSOFF_ON_MASK:
print_msg = (status & mask) ? PM_SYSOFF_ON : PM_SYSOFF_OFF;
break;
case PM_TIMER_ENABLED_MASK:
print_msg = (status & mask) ? PM_TIMER_ENABLED : PM_TIMER_DISABLED;
break;
case PM_AWAITING_RTC_EVENT_MASK:
print_msg = (status & mask) ? PM_AWAITING_RTC_EVENT : PM_AWAITING_RTC_DIS;
break;
default:
return PM_ERROR;
}
printf("Status -> %s\n", print_pm(print_msg));
*val = print_msg;
return PM_SUCCESS;
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(test_remote_pm, ev, data)
{
static uint8_t aux;
PROCESS_BEGIN();
/* Configures the pins and initializes the driver */
if(pm_init() != PM_SUCCESS) {
printf("Failed to initialize\n");
PROCESS_EXIT();
}
/* Get the current firmware version to track the driver implementation on the
* low-power MCU
*/
if(pm_get_firmware_version(&aux) != PM_SUCCESS) {
printf("Failed to retrieve PIC's fw version\n");
PROCESS_EXIT();
}
printf("Firmware PIC-Power Manager Version: V0.%u\n", aux);
if(aux != PM_EXPECTED_VERSION) {
printf("Unexpected firmware version\n");
PROCESS_EXIT();
}
/* Enables the nano timer, the power management block will be driven by the
* nano timer now, putting the node in shutdown mode every minute (as
* default). For this test you need to disconnect the USB cable off to power
* the RE-Mote ONLY from the external battery, so after veryfing the above
* works, disconnect the USB cable and hit the reset button
* When the nano timer is enabled, the external battery is shutdown for a
* couple of usecs, so the CC2538 is restarted. After this as the nano timer
* is enabled, then it will run as intended
*/
if(get_status(PM_TIMER_ENABLED_MASK, &aux) != PM_SUCCESS) {
PROCESS_EXIT();
}
if(aux == PM_TIMER_DISABLED) {
printf("Enabling the nano Timer...\n");
if(pm_enable_timer() != PM_SUCCESS) {
printf("Failed to set the nano Timer\n");
PROCESS_EXIT();
}
}
/* At this point as the RE-Mote is powered over USB you should see the prints,
* disconnect the USB cable and power only with the external battery. If
* something fails, then you should not see the red LED blinking
*/
aux = 0;
while(1){
etimer_set(&et, CLOCK_SECOND);
PROCESS_WAIT_EVENT();
aux++;
/* Enter shutdown mode before the shutdown period (1 min) expires */
if((aux % ENTER_SHUTDOWN_COUNT) == 0) {
/* Say goodnight */
PM_SHUTDOWN_NOW;
printf("Goodnight!\n");
}
leds_toggle(LEDS_RED);
}
PROCESS_END();
}

2
platform/zoul/remote/Makefile.remote
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MOTELIST_ZOLERTIA = remote
BOARD_SOURCEFILES += board.c antenna-sw.c rtcc.c
BOARD_SOURCEFILES += board.c antenna-sw.c rtcc.c power-mgmt.c

20
platform/zoul/remote/board.h
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@ -348,31 +348,27 @@
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name Shutdown Mode
* \name Power management and shutdown mode
*
* The shutdown mode is an ultra-low power operation mode that effectively
* powers-down the entire RE-Mote (CC2538, CC1200, attached sensors, etc) and
* only keeps running a power gating timer (NanoTimer), the on-board RTC and
* an ultra-low power consumption MCU (PIC12F635). The Shutdown mode allows:
*
* - Put the RE-Mote in an ultra-low power sleep (shutdown) drawing 350nA avg.
* - Put the RE-Mote in an ultra-low power sleep (shutdown) drawing <200nA avg.
* - Periodically awake and execute tasks, being the shutdown period selectable
* via R47 resistor value (22KOhm as default for 1 minute shutdown period).
* - Enter shutdown mode before the shutdown period expiration, by sending a
* pulse to SHUTDOWN_DONE.
*
* To enable or disable the shutdown mode a well-known sequence has to be sent
* to the PIC12F635 via its 1-Wire pin, when the shutdown mode is enabled,
* confirmation is done by the PIC echoing-back the command to the CC2538.
* - Enter shutdown mode before the shutdown period expiration, by invoking the
* PM_SHUTDOWN_NOW macrp
*
* The shutdown mode can be disabled by hardware by short-circuiting or placing
* an 0Ohm resistor across W1 pad.
* @{
*/
#define SHUTDOWN_DONE_PORT GPIO_D_NUM
#define SHUTDOWN_DONE_PIN 0
#define SHUTDOWN_ENABLE_PORT GPIO_D_NUM
#define SHUTDOWN_ENABLE_PIN 1
#define PM_DONE_PORT GPIO_D_NUM
#define PM_DONE_PIN 0
#define PM_CMD_PORT GPIO_D_NUM
#define PM_CMD_PIN 1
/** @} */
/*---------------------------------------------------------------------------*/
/**

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platform/zoul/remote/power-mgmt.c Normal file
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/*
* Copyright (c) 2015, Zolertia - http://www.zolertia.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 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.
*
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup remote-power-mgmt
* @{
*
* RE-Mote power management and shutdown mode
* @{
*
* \author
* Aitor Mejias <amejias@zolertia.com>
* Antonio Lignan <alinan@zolertia.com>
*/
/* -------------------------------------------------------------------------- */
#include <stdio.h>
#include <stdint.h>
#include "contiki.h"
#include "dev/gpio.h"
#include "sys/rtimer.h"
#include "power-mgmt.h"
/* -------------------------------------------------------------------------- */
#define DEBUG 0
#if DEBUG
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
/* -------------------------------------------------------------------------- */
#define PM_CMD_LINE_SET GPIO_SET_PIN(PM_CMD_PORT_BASE, PM_CMD_PIN_MASK)
#define PM_CMD_LINE_CLR GPIO_CLR_PIN(PM_CMD_PORT_BASE, PM_CMD_PIN_MASK)
#define PM_CMD_LINE_READ GPIO_READ_PIN(PM_CMD_PORT_BASE, PM_CMD_PIN_MASK)
#define PM_CMD_AS_OUTPUT GPIO_SET_OUTPUT(PM_CMD_PORT_BASE, PM_CMD_PIN_MASK)
#define PM_CMD_AS_INPUT GPIO_SET_INPUT(PM_CMD_PORT_BASE, PM_CMD_PIN_MASK)
/* -------------------------------------------------------------------------- */
#define PM_NUMBITS(X) (1 << ((X) - 1))
/* -------------------------------------------------------------------------- */
static uint8_t initialized = 0;
static uint8_t getData = 0;
/* -------------------------------------------------------------------------- */
static int8_t
pm_get_ack(void)
{
uint16_t error = PM_ERROR;
PM_CMD_AS_INPUT;
clock_delay_usec(PM_3_MILISECOND);
if(PM_CMD_LINE_READ) {
error = PM_SUCCESS;
}
clock_delay_usec(PM_10_MILISECOND);
PM_CMD_AS_OUTPUT;
return error;
}
/* -------------------------------------------------------------------------- */
static int8_t
pm_send_cmd(uint8_t cmd)
{
uint8_t i;
PRINTF("PM: cmd %u\n", cmd);
/* Enter command mode */
PM_CMD_LINE_SET;
clock_delay_usec(PM_1_MILISECOND);
PM_CMD_LINE_CLR;
/* Send command */
for (i = PM_MAX_BITS; i > 0; i--) {
clock_delay_usec(PM_1_MILISECOND);
if (cmd & PM_NUMBITS(i)) {
PM_CMD_LINE_SET;
}
else PM_CMD_LINE_CLR;
}
clock_delay_usec(PM_1_MILISECOND);
PM_CMD_LINE_CLR;
/* Receive command reply if any */
if((cmd == PM_CMD_GET_STATE) || (cmd == PM_CMD_GET_FW_VERSION)) {
PM_CMD_AS_INPUT;
clock_delay_usec(PM_2_2_MILISECOND);
for (i = PM_MAX_BITS; i > 0; i--) {
clock_delay_usec(PM_1_MILISECOND);
PM_CMD_LINE_READ ? (getData |= PM_NUMBITS(i)) : (getData &= ~PM_NUMBITS(i));
}
PRINTF("PM: getData = 0x%02X\n", getData);
clock_delay_usec(PM_2_2_MILISECOND);
PM_CMD_AS_OUTPUT;
PM_CMD_LINE_CLR;
clock_delay_usec(PM_2_2_MILISECOND);
return PM_SUCCESS;
}
/* Default case */
clock_delay_usec(PM_1_MILISECOND);
return pm_get_ack();
}
/* -------------------------------------------------------------------------- */
int8_t
pm_init(void)
{
/* Configure and clear immediately */
GPIO_SOFTWARE_CONTROL(PM_DONE_PORT_BASE, PM_DONE_PIN_MASK);
GPIO_SET_OUTPUT(PM_DONE_PORT_BASE, PM_DONE_PIN_MASK);
GPIO_CLR_PIN(PM_DONE_PORT_BASE, PM_DONE_PIN_MASK);
/* Set as output/low to set IDLE state */
GPIO_SOFTWARE_CONTROL(PM_CMD_PORT_BASE, PM_CMD_PIN_MASK);
PM_CMD_AS_OUTPUT;
PM_CMD_LINE_CLR;
/* Ensure the battery charger is on, so we don't lock ourselves out and left
* stranded in a state the CC2538 and components are kept off
*/
if(pm_send_cmd(PM_CMD_PWR_ON) == PM_SUCCESS) {
initialized = 1;
PRINTF("PM: Initialized\n");
return PM_SUCCESS;
}
PRINTF("PM: Failed to initialize\n");
return PM_ERROR;
}
/* -------------------------------------------------------------------------- */
int8_t
pm_enable_timer(void)
{
if(!initialized) {
return PM_ERROR;
}
if(pm_send_cmd(PM_CMD_DTIMER_ON) == PM_SUCCESS) {
return PM_SUCCESS;
}
return PM_ERROR;
}
/* -------------------------------------------------------------------------- */
int8_t
pm_disable_timer(void)
{
if(!initialized) {
return PM_ERROR;
}
if(pm_send_cmd(PM_CMD_DTIMER_OFF) == PM_SUCCESS) {
return PM_SUCCESS;
}
return PM_ERROR;
}
/* -------------------------------------------------------------------------- */
int8_t
pm_get_state(uint8_t *state)
{
if(!initialized) {
return PM_ERROR;
}
if(pm_send_cmd(PM_CMD_GET_STATE) == PM_SUCCESS) {
*state = getData;
PRINTF("PM: state %u\n", getData);
return PM_SUCCESS;
}
return PM_ERROR;
}
/* -------------------------------------------------------------------------- */
int8_t
pm_get_firmware_version(uint8_t *state)
{
if(!initialized) {
return PM_ERROR;
}
if (pm_send_cmd(PM_CMD_GET_FW_VERSION) == PM_SUCCESS) {
*state = getData;
printf("PM: FW Version %u\n", getData);
return PM_SUCCESS;
}
return PM_ERROR;
}
/*---------------------------------------------------------------------------*/
/**
* @}
* @}
*/

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platform/zoul/remote/power-mgmt.h Normal file
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/*
* Copyright (c) 2015, Zolertia - http://www.zolertia.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 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.
*
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup remote
* @{
*
* \defgroup remote-power-mgmt RE-Mote power management driver
*
* The power management module is composed by a nano-watt (gating) timer and an
* ultra-low power MCU, driving the RE-Mote power supply when connected to an
* external battery, and allowing an application to enter a so-called "shutdown
* mode".
* While in shutdown mode, only the RTCC and the power management block is on,
* effectively reducing the RE-Mote power consumption down to <~200nA. The
* nano Timer allows the RE-Mote to be awaken off shutdown mode after a given
* period (from 100ms to 2 hours, default is 1 minute). To change the shutdown
* period, the R47 resistor (at the DELAY input pin, see the RE-Mote datasheet)
* has to be changed.
* See the TPL5110 datasheet ((Table 2 and 3) for more information about the R47
* resistor value, below is a table resuming most common periods:
*
* +------------+------------+
* | R47 (Ohm) | Time |
* +------------+------------+
* | 500 | 100ms |
* +------------+------------+
* | 2.5K | 500ms |
* +------------+------------+
* | 5.202K | 1s |
* +------------+------------+
* | 22.021K | 1min |
* +------------+------------+
* | 42.887K | 5min |
* +------------+------------+
* | 57.434K | 10min |
* +------------+------------+
* | 92.233K | 30min |
* +------------+------------+
* | 170K | 2h |
* +------------+------------+
*
* An application can enter the shutdown mode before the shutdown period expires
* by invoking the PM_SHUTDOWN_NOW macro.
* The on-board RTCC can also be used to drive the CC2538 off PM3 power mode, if
* the application requires to retain RAM. Note that while in shutdown mode the
* RE-Mote will be powered off.
*
* @{
*
* \file
* Header file for the RE-Mote Power Management driver
*/
/* -------------------------------------------------------------------------- */
#ifndef POWER_MGMT_H_
#define POWER_MGMT_H_
#include "dev/gpio.h"
/* -------------------------------------------------------------------------- */
#define PM_CMD_PORT_BASE GPIO_PORT_TO_BASE(PM_CMD_PORT)
#define PM_CMD_PIN_MASK GPIO_PIN_MASK(PM_CMD_PIN)
#define PM_DONE_PORT_BASE GPIO_PORT_TO_BASE(PM_DONE_PORT)
#define PM_DONE_PIN_MASK GPIO_PIN_MASK(PM_DONE_PIN)
/* -------------------------------------------------------------------------- */
/** \name Power Management return values
* @{
*/
#define PM_SUCCESS 0
#define PM_ERROR (-1)
#define PM_MAX_BITS 8
/** @} */
/* -------------------------------------------------------------------------- */
/** \name Power Management "done" signal
* @{
*/
#define PM_SHUTDOWN_NOW GPIO_SET_PIN(PM_DONE_PORT_BASE, PM_DONE_PIN_MASK)
/** @} */
/* -------------------------------------------------------------------------- */
/** \name Power Management timing values
* @{
*/
#define PM_1_MILISECOND 1000L
#define PM_2_2_MILISECOND 2200L
#define PM_3_MILISECOND 3000L
#define PM_10_MILISECOND 10000L
/** @} */
/* -------------------------------------------------------------------------- */
/** \name Power Management commands
* @{
*/
typedef enum {
PM_CMD_PWR_ON = 0x34,
PM_CMD_PWR_OFF = 0x35,
PM_CMD_RST_HARD = 0x36,
PM_CMD_RST_TIMED = 0x37, /* Not implemented */
PM_CMD_DTIMER_ON = 0x38,
PM_CMD_DTIMER_OFF = 0x39,
PM_CMD_DTIMER_TIMED = 0x3A, /* Not implemented */
PM_CMD_PARAM_SET_MAX_TIME = 0x3B, /* Not implemented */
PM_CMD_GET_STATE = 0x3C,
PM_CMD_GET_FW_VERSION = 0x3D,
PM_MAX_NUM_CMDS
} pm_cmd_t;
/** @} */
/* -------------------------------------------------------------------------- */
/** \name Power Management status and masks
* @{
*/
typedef enum {
PM_IDLE,
PM_SYSOFF_OFF,
PM_SYSOFF_ON,
PM_TIMER_DISABLED,
PM_TIMER_ENABLED,
PM_AWAITING_RTC_DIS, /* Not implemented */
PM_AWAITING_RTC_EVENT, /* Not implemented */
} pm_state_t;
#define PM_SYSOFF_ON_MASK 0x01
#define PM_TIMER_ENABLED_MASK 0x02
#define PM_AWAITING_RTC_EVENT_MASK 0x04
/** @} */
/* -------------------------------------------------------------------------- */
/** \name Power Management functions
* @{
*/
/** \brief Initializes the Power Management driver
* \return \c PM_SUCCESS if initialized, else \c PM_ERROR
*/
int8_t pm_init(void);
/* -------------------------------------------------------------------------- */
/** \brief Enable the shutdown mode, periodically driven by the Nano Timer
* \return \c PM_SUCCESS if successful, else \c PM_ERROR
*/
int8_t pm_enable_timer(void);
/* -------------------------------------------------------------------------- */
/** \brief Disable the Nano Timer
* \return \c PM_SUCCESS if successful, else \c PM_ERROR
*/
int8_t pm_disable_timer(void);
/* -------------------------------------------------------------------------- */
/** \brief Get the current state of the power management module
* \param state Pointer to a variable to save the state
* \return \c PM_SUCCESS if successful, else \c PM_ERROR
*/
int8_t pm_get_state(uint8_t *state);
/* -------------------------------------------------------------------------- */
/** \brief Get the firmware version of the power management module
* \param state Pointer to a variable to save the state
* \return \c PM_SUCCESS if successful, else \c PM_ERROR
*/
int8_t pm_get_firmware_version(uint8_t *state);
/* -------------------------------------------------------------------------- */
/** @} */
#endif /* POWER_MGMT_H_ */
/*---------------------------------------------------------------------------*/
/**
* @}
* @}
*/