mbed library sources modified for open wear
Dependents: openwear-lifelogger-example
Fork of mbed-src by
targets/hal/TARGET_NXP/TARGET_LPC408X/sleep.c@15:4892fe388435, 2013-08-07 (annotated)
- Committer:
- bogdanm
- Date:
- Wed Aug 07 16:43:59 2013 +0300
- Revision:
- 15:4892fe388435
Added LPC4088 target and interrupt chaining code
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bogdanm | 15:4892fe388435 | 1 | /* mbed Microcontroller Library |
bogdanm | 15:4892fe388435 | 2 | * Copyright (c) 2006-2013 ARM Limited |
bogdanm | 15:4892fe388435 | 3 | * |
bogdanm | 15:4892fe388435 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
bogdanm | 15:4892fe388435 | 5 | * you may not use this file except in compliance with the License. |
bogdanm | 15:4892fe388435 | 6 | * You may obtain a copy of the License at |
bogdanm | 15:4892fe388435 | 7 | * |
bogdanm | 15:4892fe388435 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
bogdanm | 15:4892fe388435 | 9 | * |
bogdanm | 15:4892fe388435 | 10 | * Unless required by applicable law or agreed to in writing, software |
bogdanm | 15:4892fe388435 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
bogdanm | 15:4892fe388435 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
bogdanm | 15:4892fe388435 | 13 | * See the License for the specific language governing permissions and |
bogdanm | 15:4892fe388435 | 14 | * limitations under the License. |
bogdanm | 15:4892fe388435 | 15 | */ |
bogdanm | 15:4892fe388435 | 16 | #include "sleep_api.h" |
bogdanm | 15:4892fe388435 | 17 | #include "cmsis.h" |
bogdanm | 15:4892fe388435 | 18 | #include "mbed_interface.h" |
bogdanm | 15:4892fe388435 | 19 | |
bogdanm | 15:4892fe388435 | 20 | void sleep(void) { |
bogdanm | 15:4892fe388435 | 21 | LPC_SC->PCON = 0x0; |
bogdanm | 15:4892fe388435 | 22 | |
bogdanm | 15:4892fe388435 | 23 | // SRC[SLEEPDEEP] set to 0 = sleep |
bogdanm | 15:4892fe388435 | 24 | SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk; |
bogdanm | 15:4892fe388435 | 25 | |
bogdanm | 15:4892fe388435 | 26 | // wait for interrupt |
bogdanm | 15:4892fe388435 | 27 | __WFI(); |
bogdanm | 15:4892fe388435 | 28 | } |
bogdanm | 15:4892fe388435 | 29 | |
bogdanm | 15:4892fe388435 | 30 | /* |
bogdanm | 15:4892fe388435 | 31 | * The mbed lpc1768 does not support the deepsleep mode |
bogdanm | 15:4892fe388435 | 32 | * as a debugger is connected to it (the mbed interface). |
bogdanm | 15:4892fe388435 | 33 | * |
bogdanm | 15:4892fe388435 | 34 | * As mentionned in an application note from NXP: |
bogdanm | 15:4892fe388435 | 35 | * |
bogdanm | 15:4892fe388435 | 36 | * http://www.po-star.com/public/uploads/20120319123122_141.pdf |
bogdanm | 15:4892fe388435 | 37 | * |
bogdanm | 15:4892fe388435 | 38 | * {{{ |
bogdanm | 15:4892fe388435 | 39 | * The user should be aware of certain limitations during debugging. |
bogdanm | 15:4892fe388435 | 40 | * The most important is that, due to limitations of the Cortex-M3 |
bogdanm | 15:4892fe388435 | 41 | * integration, the LPC17xx cannot wake up in the usual manner from |
bogdanm | 15:4892fe388435 | 42 | * Deep Sleep and Power-down modes. It is recommended not to use these |
bogdanm | 15:4892fe388435 | 43 | * modes during debug. Once an application is downloaded via JTAG/SWD |
bogdanm | 15:4892fe388435 | 44 | * interface, the USB to SWD/JTAG debug adapter (Keil ULINK2 for example) |
bogdanm | 15:4892fe388435 | 45 | * should be removed from the target board, and thereafter, power cycle |
bogdanm | 15:4892fe388435 | 46 | * the LPC17xx to allow wake-up from deep sleep and power-down modes |
bogdanm | 15:4892fe388435 | 47 | * }}} |
bogdanm | 15:4892fe388435 | 48 | * |
bogdanm | 15:4892fe388435 | 49 | * As the interface firmware does not reset the target when a |
bogdanm | 15:4892fe388435 | 50 | * mbed_interface_disconnect() semihosting call is made, the |
bogdanm | 15:4892fe388435 | 51 | * core cannot wake-up from deepsleep. |
bogdanm | 15:4892fe388435 | 52 | * |
bogdanm | 15:4892fe388435 | 53 | * We treat a deepsleep() as a normal sleep(). |
bogdanm | 15:4892fe388435 | 54 | */ |
bogdanm | 15:4892fe388435 | 55 | void deepsleep(void) { |
bogdanm | 15:4892fe388435 | 56 | sleep(); |
bogdanm | 15:4892fe388435 | 57 | } |