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Last commit 20 Feb 2019 by 
mbed official
targets/hal/TARGET_NXP/TARGET_LPC176X/sleep.c@13:0645d8841f51, 2013-08-05 (annotated)
- Committer:
- bogdanm
- Date:
- Mon Aug 05 14:12:34 2013 +0300
- Revision:
- 13:0645d8841f51
- Parent:
- vendor/NXP/LPC1768/hal/sleep.c@10:3bc89ef62ce7
- Child:
- 79:6fdc4ea80ae0
Update mbed sources to revision 64
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| emilmont | 10:3bc89ef62ce7 | 1 | /* mbed Microcontroller Library |
| emilmont | 10:3bc89ef62ce7 | 2 | * Copyright (c) 2006-2013 ARM Limited |
| emilmont | 10:3bc89ef62ce7 | 3 | * |
| emilmont | 10:3bc89ef62ce7 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| emilmont | 10:3bc89ef62ce7 | 5 | * you may not use this file except in compliance with the License. |
| emilmont | 10:3bc89ef62ce7 | 6 | * You may obtain a copy of the License at |
| emilmont | 10:3bc89ef62ce7 | 7 | * |
| emilmont | 10:3bc89ef62ce7 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| emilmont | 10:3bc89ef62ce7 | 9 | * |
| emilmont | 10:3bc89ef62ce7 | 10 | * Unless required by applicable law or agreed to in writing, software |
| emilmont | 10:3bc89ef62ce7 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| emilmont | 10:3bc89ef62ce7 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| emilmont | 10:3bc89ef62ce7 | 13 | * See the License for the specific language governing permissions and |
| emilmont | 10:3bc89ef62ce7 | 14 | * limitations under the License. |
| emilmont | 10:3bc89ef62ce7 | 15 | */ |
| emilmont | 10:3bc89ef62ce7 | 16 | #include "sleep_api.h" |
| emilmont | 10:3bc89ef62ce7 | 17 | #include "cmsis.h" |
| emilmont | 10:3bc89ef62ce7 | 18 | #include "mbed_interface.h" |
| emilmont | 10:3bc89ef62ce7 | 19 | |
| emilmont | 10:3bc89ef62ce7 | 20 | void sleep(void) { |
| emilmont | 10:3bc89ef62ce7 | 21 | // ensure debug is disconnected |
| emilmont | 10:3bc89ef62ce7 | 22 | mbed_interface_disconnect(); |
| emilmont | 10:3bc89ef62ce7 | 23 | |
| emilmont | 10:3bc89ef62ce7 | 24 | // PCON[PD] set to sleep |
| emilmont | 10:3bc89ef62ce7 | 25 | LPC_SC->PCON = 0x0; |
| emilmont | 10:3bc89ef62ce7 | 26 | |
| emilmont | 10:3bc89ef62ce7 | 27 | // SRC[SLEEPDEEP] set to 0 = sleep |
| emilmont | 10:3bc89ef62ce7 | 28 | SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk; |
| emilmont | 10:3bc89ef62ce7 | 29 | |
| emilmont | 10:3bc89ef62ce7 | 30 | // wait for interrupt |
| emilmont | 10:3bc89ef62ce7 | 31 | __WFI(); |
| emilmont | 10:3bc89ef62ce7 | 32 | } |
| emilmont | 10:3bc89ef62ce7 | 33 | |
| emilmont | 10:3bc89ef62ce7 | 34 | /* |
| emilmont | 10:3bc89ef62ce7 | 35 | * The mbed lpc1768 does not support the deepsleep mode |
| emilmont | 10:3bc89ef62ce7 | 36 | * as a debugger is connected to it (the mbed interface). |
| emilmont | 10:3bc89ef62ce7 | 37 | * |
| emilmont | 10:3bc89ef62ce7 | 38 | * As mentionned in an application note from NXP: |
| emilmont | 10:3bc89ef62ce7 | 39 | * |
| emilmont | 10:3bc89ef62ce7 | 40 | * http://www.po-star.com/public/uploads/20120319123122_141.pdf |
| emilmont | 10:3bc89ef62ce7 | 41 | * |
| emilmont | 10:3bc89ef62ce7 | 42 | * {{{ |
| emilmont | 10:3bc89ef62ce7 | 43 | * The user should be aware of certain limitations during debugging. |
| emilmont | 10:3bc89ef62ce7 | 44 | * The most important is that, due to limitations of the Cortex-M3 |
| emilmont | 10:3bc89ef62ce7 | 45 | * integration, the LPC17xx cannot wake up in the usual manner from |
| emilmont | 10:3bc89ef62ce7 | 46 | * Deep Sleep and Power-down modes. It is recommended not to use these |
| emilmont | 10:3bc89ef62ce7 | 47 | * modes during debug. Once an application is downloaded via JTAG/SWD |
| emilmont | 10:3bc89ef62ce7 | 48 | * interface, the USB to SWD/JTAG debug adapter (Keil ULINK2 for example) |
| emilmont | 10:3bc89ef62ce7 | 49 | * should be removed from the target board, and thereafter, power cycle |
| emilmont | 10:3bc89ef62ce7 | 50 | * the LPC17xx to allow wake-up from deep sleep and power-down modes |
| emilmont | 10:3bc89ef62ce7 | 51 | * }}} |
| emilmont | 10:3bc89ef62ce7 | 52 | * |
| emilmont | 10:3bc89ef62ce7 | 53 | * As the interface firmware does not reset the target when a |
| emilmont | 10:3bc89ef62ce7 | 54 | * mbed_interface_disconnect() semihosting call is made, the |
| emilmont | 10:3bc89ef62ce7 | 55 | * core cannot wake-up from deepsleep. |
| emilmont | 10:3bc89ef62ce7 | 56 | * |
| emilmont | 10:3bc89ef62ce7 | 57 | * We treat a deepsleep() as a normal sleep(). |
| emilmont | 10:3bc89ef62ce7 | 58 | */ |
| emilmont | 10:3bc89ef62ce7 | 59 | |
| emilmont | 10:3bc89ef62ce7 | 60 | void deepsleep(void) { |
| emilmont | 10:3bc89ef62ce7 | 61 | // ensure debug is disconnected |
| emilmont | 10:3bc89ef62ce7 | 62 | mbed_interface_disconnect(); |
| emilmont | 10:3bc89ef62ce7 | 63 | |
| emilmont | 10:3bc89ef62ce7 | 64 | // PCON[PD] set to deepsleep |
| emilmont | 10:3bc89ef62ce7 | 65 | sleep(); |
| emilmont | 10:3bc89ef62ce7 | 66 | } |
