191 lines
6.5 KiB
C
191 lines
6.5 KiB
C
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/**************************************************************************************************
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Filename: mac_sleep.c
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Revised: $Date: 2007-10-29 19:11:44 -0700 (Mon, 29 Oct 2007) $
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Revision: $Revision: 15810 $
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Description: Describe the purpose and contents of the file.
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Copyright 2006-2009 Texas Instruments Incorporated. All rights reserved.
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IMPORTANT: Your use of this Software is limited to those specific rights
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granted under the terms of a software license agreement between the user
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who downloaded the software, his/her employer (which must be your employer)
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and Texas Instruments Incorporated (the "License"). You may not use this
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Software unless you agree to abide by the terms of the License. The License
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limits your use, and you acknowledge, that the Software may not be modified,
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copied or distributed unless embedded on a Texas Instruments microcontroller
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or used solely and exclusively in conjunction with a Texas Instruments radio
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frequency transceiver, which is integrated into your product. Other than for
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the foregoing purpose, you may not use, reproduce, copy, prepare derivative
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works of, modify, distribute, perform, display or sell this Software and/or
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its documentation for any purpose.
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YOU FURTHER ACKNOWLEDGE AND AGREE THAT THE SOFTWARE AND DOCUMENTATION ARE
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PROVIDED <EFBFBD>AS IS<EFBFBD> WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,
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INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, TITLE,
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NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL
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TEXAS INSTRUMENTS OR ITS LICENSORS BE LIABLE OR OBLIGATED UNDER CONTRACT,
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NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION, BREACH OF WARRANTY, OR OTHER
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LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT DAMAGES OR EXPENSES
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INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL, INDIRECT, PUNITIVE
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OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, COST OF PROCUREMENT
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OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY CLAIMS BY THIRD PARTIES
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(INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS.
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Should you have any questions regarding your right to use this Software,
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contact Texas Instruments Incorporated at www.TI.com.
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**************************************************************************************************/
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/* ------------------------------------------------------------------------------------------------
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* Includes
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* ------------------------------------------------------------------------------------------------
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*/
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/* hal */
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#include "hal_types.h"
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/* high-level */
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#include "mac_pib.h"
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/* exported low-level */
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#include "mac_low_level.h"
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/* low-level specific */
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#include "mac_sleep.h"
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#include "mac_radio.h"
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#include "mac_tx.h"
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#include "mac_rx.h"
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#include "mac_rx_onoff.h"
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/* target specific */
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#include "mac_radio_defs.h"
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/* debug */
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#include "mac_assert.h"
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/* ------------------------------------------------------------------------------------------------
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* Global Variables
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* ------------------------------------------------------------------------------------------------
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*/
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uint8 macSleepState = MAC_SLEEP_STATE_RADIO_OFF;
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/**************************************************************************************************
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* @fn macSleepWakeUp
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*
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* @brief Wake up the radio from sleep mode.
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*
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* @param none
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*
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* @return none
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**************************************************************************************************
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*/
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MAC_INTERNAL_API void macSleepWakeUp(void)
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{
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/* don't wake up radio if it's already awake */
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if (macSleepState == MAC_SLEEP_STATE_AWAKE)
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{
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return;
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}
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/* wake up MAC timer */
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MAC_RADIO_TIMER_WAKE_UP();
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/* if radio was completely off, restore from that state first */
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if (macSleepState == MAC_SLEEP_STATE_RADIO_OFF)
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{
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/* turn on radio power (turns on oscillator too) */
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MAC_RADIO_TURN_ON_POWER();
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/* power-up initialization of receive logic */
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macRxRadioPowerUpInit();
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}
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else
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{
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MAC_ASSERT(macSleepState == MAC_SLEEP_STATE_OSC_OFF);
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/* turn on the oscillator */
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MAC_RADIO_TURN_ON_OSC();
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}
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/* update sleep state here before requesting to turn on receiver */
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macSleepState = MAC_SLEEP_STATE_AWAKE;
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/* turn on the receiver if enabled */
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macRxOnRequest();
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}
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/**************************************************************************************************
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* @fn macSleep
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*
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* @brief Puts radio into the selected sleep mode.
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*
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* @param sleepState - selected sleep level, see #defines in .h file
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*
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* @return TRUE if radio was successfully put into selected sleep mode.
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* FALSE if it was not safe for radio to go to sleep.
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**************************************************************************************************
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*/
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MAC_INTERNAL_API uint8 macSleep(uint8 sleepState)
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{
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halIntState_t s;
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/* disable interrupts until macSleepState can be set */
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HAL_ENTER_CRITICAL_SECTION(s);
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/* assert checks */
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MAC_ASSERT(macSleepState == MAC_SLEEP_STATE_AWAKE); /* radio must be awake to put it to sleep */
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MAC_ASSERT(macRxFilter == RX_FILTER_OFF); /* do not sleep when scanning or in promiscuous mode */
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/* if either RX or TX is active or any RX enable flags are set, it's not OK to sleep */
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if (macRxActive || macRxOutgoingAckFlag || macTxActive || macRxEnableFlags)
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{
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HAL_EXIT_CRITICAL_SECTION(s);
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return(FALSE);
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}
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/* turn off the receiver */
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macRxOff();
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/* update sleep state variable */
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macSleepState = sleepState;
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/* macSleepState is now set, re-enable interrupts */
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HAL_EXIT_CRITICAL_SECTION(s);
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/* put MAC timer to sleep */
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MAC_RADIO_TIMER_SLEEP();
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/* put radio in selected sleep mode */
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if (sleepState == MAC_SLEEP_STATE_OSC_OFF)
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{
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MAC_RADIO_TURN_OFF_OSC();
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}
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else
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{
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MAC_ASSERT(sleepState == MAC_SLEEP_STATE_RADIO_OFF); /* unknown sleep state */
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MAC_RADIO_TURN_OFF_POWER();
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}
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/* radio successfully entered sleep mode */
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return(TRUE);
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}
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/**************************************************************************************************
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* Compile Time Integrity Checks
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**************************************************************************************************
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*/
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#if ((MAC_SLEEP_STATE_AWAKE == MAC_SLEEP_STATE_OSC_OFF) || \
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(MAC_SLEEP_STATE_AWAKE == MAC_SLEEP_STATE_RADIO_OFF))
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#error "ERROR! Non-unique state values."
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#endif
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/**************************************************************************************************
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*/
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