Thomas Byrne / mbed-src-stm32f030k6

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targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/sleep.c@596:d25a30803853, 2015-07-21 (annotated)

Committer:
ersatzavian
Date:
Tue Jul 21 14:09:45 2015 -0700
Revision:
596:d25a30803853
Parent:
548:1abac31e188e 
added missing bracket probably I hope

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 525:c320967f86b9 1 /* mbed Microcontroller Library
mbed_official 525:c320967f86b9 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 525:c320967f86b9 3 *
mbed_official 525:c320967f86b9 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 525:c320967f86b9 5 * you may not use this file except in compliance with the License.
mbed_official 525:c320967f86b9 6 * You may obtain a copy of the License at
mbed_official 525:c320967f86b9 7 *
mbed_official 525:c320967f86b9 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 525:c320967f86b9 9 *
mbed_official 525:c320967f86b9 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 525:c320967f86b9 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 525:c320967f86b9 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 525:c320967f86b9 13 * See the License for the specific language governing permissions and
mbed_official 525:c320967f86b9 14 * limitations under the License.
mbed_official 525:c320967f86b9 15 */
mbed_official 525:c320967f86b9 16
mbed_official 525:c320967f86b9 17 #include "device.h"
mbed_official 525:c320967f86b9 18 #if DEVICE_SLEEP
mbed_official 525:c320967f86b9 19
mbed_official 525:c320967f86b9 20 #include "sleep_api.h"
mbed_official 526:7c4bdfe6a168 21 #include "sleepmodes.h"
mbed_official 525:c320967f86b9 22 #include "cmsis.h"
mbed_official 525:c320967f86b9 23 #include "em_emu.h"
mbed_official 525:c320967f86b9 24 #include "em_int.h"
mbed_official 525:c320967f86b9 25
mbed_official 525:c320967f86b9 26 uint32_t sleep_block_counter[NUM_SLEEP_MODES] = {0};
mbed_official 525:c320967f86b9 27
mbed_official 525:c320967f86b9 28 /**
mbed_official 525:c320967f86b9 29 * Sleep mode.
mbed_official 525:c320967f86b9 30 * Enter Energy Mode 1, which turns off the clock to the CPU.
mbed_official 525:c320967f86b9 31 *
mbed_official 525:c320967f86b9 32 * In EM1, the CPU is sleeping and the power consumption is only 50 μA/MHz.
mbed_official 525:c320967f86b9 33 * All peripherals, including DMA, PRS and memory system, are still available.
mbed_official 525:c320967f86b9 34 */
mbed_official 525:c320967f86b9 35 void sleep(void)
mbed_official 525:c320967f86b9 36 {
mbed_official 548:1abac31e188e 37 if (sleep_block_counter[0] > 0) {
mbed_official 548:1abac31e188e 38 // Blocked everything below EM0, so just return
mbed_official 548:1abac31e188e 39 return;
mbed_official 548:1abac31e188e 40 } else if (sleep_block_counter[1] > 0) {
mbed_official 548:1abac31e188e 41 // Blocked everything below EM1, enter EM1
mbed_official 548:1abac31e188e 42 EMU_EnterEM1();
mbed_official 548:1abac31e188e 43 } else if (sleep_block_counter[2] > 0) {
mbed_official 548:1abac31e188e 44 // Blocked everything below EM2, enter EM2
mbed_official 548:1abac31e188e 45 EMU_EnterEM2(true);
mbed_official 548:1abac31e188e 46 } else if (sleep_block_counter[3] > 0) {
mbed_official 548:1abac31e188e 47 // Blocked everything below EM3, enter EM3
mbed_official 548:1abac31e188e 48 EMU_EnterEM3(true);
mbed_official 548:1abac31e188e 49 }
mbed_official 525:c320967f86b9 50 return;
mbed_official 525:c320967f86b9 51 }
mbed_official 525:c320967f86b9 52
mbed_official 525:c320967f86b9 53 /**
mbed_official 525:c320967f86b9 54 * Deep Sleep mode.
mbed_official 525:c320967f86b9 55 * Enter Energy Mode 2, turning off all high-frequency clocks.
mbed_official 525:c320967f86b9 56 *
mbed_official 525:c320967f86b9 57 * In EM2 the high frequency oscillator is turned off, but with the 32.768 kHz
mbed_official 525:c320967f86b9 58 * oscillator running, selected low energy peripherals (LCD, RTC, LETIMER,
mbed_official 525:c320967f86b9 59 * PCNT, LEUART, I2C, LESENSE, OPAMP, USB, WDOG and ACMP) are still
mbed_official 525:c320967f86b9 60 * available. This gives a high degree of autonomous operation with a current
mbed_official 525:c320967f86b9 61 * consumption as low as 1.1 μA with RTC enabled. Power-on Reset, Brown-out
mbed_official 525:c320967f86b9 62 * Detection and full RAM and CPU retention is also included.
mbed_official 525:c320967f86b9 63 */
mbed_official 525:c320967f86b9 64 void deepsleep(void)
mbed_official 525:c320967f86b9 65 {
mbed_official 525:c320967f86b9 66 EMU_EnterEM2(true);
mbed_official 525:c320967f86b9 67 }
mbed_official 525:c320967f86b9 68
mbed_official 525:c320967f86b9 69 /** Block the microcontroller from sleeping below a certain mode
mbed_official 525:c320967f86b9 70 *
mbed_official 525:c320967f86b9 71 * This will block sleep() from entering an energy mode below the one given.
mbed_official 525:c320967f86b9 72 * -- To be called by peripheral HAL's --
mbed_official 525:c320967f86b9 73 *
mbed_official 525:c320967f86b9 74 * After the peripheral is finished with the operation, it should call unblock with the same state
mbed_official 525:c320967f86b9 75 *
mbed_official 525:c320967f86b9 76 */
mbed_official 548:1abac31e188e 77 void blockSleepMode(sleepstate_enum minimumMode)
mbed_official 525:c320967f86b9 78 {
mbed_official 548:1abac31e188e 79 INT_Disable();
mbed_official 548:1abac31e188e 80 sleep_block_counter[minimumMode]++;
mbed_official 548:1abac31e188e 81 INT_Enable();
mbed_official 525:c320967f86b9 82 }
mbed_official 525:c320967f86b9 83
mbed_official 525:c320967f86b9 84 /** Unblock the microcontroller from sleeping below a certain mode
mbed_official 525:c320967f86b9 85 *
mbed_official 525:c320967f86b9 86 * This will unblock sleep() from entering an energy mode below the one given.
mbed_official 525:c320967f86b9 87 * -- To be called by peripheral HAL's --
mbed_official 525:c320967f86b9 88 *
mbed_official 525:c320967f86b9 89 * This should be called after all transactions on a peripheral are done.
mbed_official 525:c320967f86b9 90 */
mbed_official 548:1abac31e188e 91 void unblockSleepMode(sleepstate_enum minimumMode)
mbed_official 525:c320967f86b9 92 {
mbed_official 548:1abac31e188e 93 INT_Disable();
mbed_official 548:1abac31e188e 94 if(sleep_block_counter[minimumMode] > 0) {
mbed_official 548:1abac31e188e 95 sleep_block_counter[minimumMode]--;
mbed_official 548:1abac31e188e 96 }
mbed_official 548:1abac31e188e 97 INT_Enable();
mbed_official 525:c320967f86b9 98 }
mbed_official 525:c320967f86b9 99
mbed_official 525:c320967f86b9 100 #endif