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Last commit 20 Feb 2019 by 
mbed official
targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/sleep.c@548:1abac31e188e, 2015-05-22 (annotated)
- Committer:
- mbed_official
- Date:
- Fri May 22 10:45:46 2015 +0100
- Revision:
- 548:1abac31e188e
- Parent:
- 526:7c4bdfe6a168
- Child:
- 627:4fa1328d9c60
Synchronized with git revision 88d158e43b54f97c5e94da305ea9a096889cc81b
Full URL: https://github.com/mbedmicro/mbed/commit/88d158e43b54f97c5e94da305ea9a096889cc81b/
Silicon Labs - Cosmetic: apply mbed coding style to HAL
Who changed what in which revision?
| User | Revision | Line number | New 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 |
