Nick Zhou / mbed-src-ST-demo

mbed library sources change for ST sensors and ST BLE

Fork of mbed-src by mbed official

targets/hal/TARGET_NXP/TARGET_LPC11U6X/sleep.c@510:bb3effbb3493, 2015-04-09 (annotated)

Committer:
mbed_official
Date:
Thu Apr 09 08:00:08 2015 +0100
Revision:
510:bb3effbb3493
Synchronized with git revision 9ef9a549724a809142e5d9b80292843962a48c17



Full URL: https://github.com/mbedmicro/mbed/commit/9ef9a549724a809142e5d9b80292843962a48c17/



Add sleep and deepsleep for LPC11U68. Needs testing on board

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 510:bb3effbb3493 1 /* mbed Microcontroller Library
mbed_official 510:bb3effbb3493 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 510:bb3effbb3493 3 *
mbed_official 510:bb3effbb3493 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 510:bb3effbb3493 5 * you may not use this file except in compliance with the License.
mbed_official 510:bb3effbb3493 6 * You may obtain a copy of the License at
mbed_official 510:bb3effbb3493 7 *
mbed_official 510:bb3effbb3493 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 510:bb3effbb3493 9 *
mbed_official 510:bb3effbb3493 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 510:bb3effbb3493 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 510:bb3effbb3493 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 510:bb3effbb3493 13 * See the License for the specific language governing permissions and
mbed_official 510:bb3effbb3493 14 * limitations under the License.
mbed_official 510:bb3effbb3493 15 */
mbed_official 510:bb3effbb3493 16 #include "sleep_api.h"
mbed_official 510:bb3effbb3493 17 #include "cmsis.h"
mbed_official 510:bb3effbb3493 18 #include "mbed_interface.h"
mbed_official 510:bb3effbb3493 19
mbed_official 510:bb3effbb3493 20 #if DEVICE_SLEEP
mbed_official 510:bb3effbb3493 21
mbed_official 510:bb3effbb3493 22 void sleep(void) {
mbed_official 510:bb3effbb3493 23
mbed_official 510:bb3effbb3493 24 #if (DEVICE_SEMIHOST == 1)
mbed_official 510:bb3effbb3493 25 // ensure debug is disconnected
mbed_official 510:bb3effbb3493 26 mbed_interface_disconnect();
mbed_official 510:bb3effbb3493 27 #endif
mbed_official 510:bb3effbb3493 28
mbed_official 510:bb3effbb3493 29 // PCON[PM] (bits 2:0) set to 0
mbed_official 510:bb3effbb3493 30 LPC_PMU->PCON &= ~0x03;
mbed_official 510:bb3effbb3493 31
mbed_official 510:bb3effbb3493 32 // SRC[SLEEPDEEP] set to 0 = sleep
mbed_official 510:bb3effbb3493 33 SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
mbed_official 510:bb3effbb3493 34
mbed_official 510:bb3effbb3493 35 // wait for interrupt
mbed_official 510:bb3effbb3493 36 __WFI();
mbed_official 510:bb3effbb3493 37 }
mbed_official 510:bb3effbb3493 38
mbed_official 510:bb3effbb3493 39
mbed_official 510:bb3effbb3493 40 void deepsleep(void) {
mbed_official 510:bb3effbb3493 41
mbed_official 510:bb3effbb3493 42 #if (DEVICE_SEMIHOST == 1)
mbed_official 510:bb3effbb3493 43 // ensure debug is disconnected
mbed_official 510:bb3effbb3493 44 mbed_interface_disconnect();
mbed_official 510:bb3effbb3493 45 #endif
mbed_official 510:bb3effbb3493 46
mbed_official 510:bb3effbb3493 47 // PCON[PM] (bits 2:0) set to 1
mbed_official 510:bb3effbb3493 48 LPC_PMU->PCON &= ~0x03;
mbed_official 510:bb3effbb3493 49 LPC_PMU->PCON |= 0x01;
mbed_official 510:bb3effbb3493 50
mbed_official 510:bb3effbb3493 51 //According to user manual it is kinda picky about reserved bits, so we follow that nicely
mbed_official 510:bb3effbb3493 52 //Keep WDOSC and BOD in same state as they are now during deepsleep
mbed_official 510:bb3effbb3493 53 LPC_SYSCON->PDSLEEPCFG = 0x00000037 | (LPC_SYSCON->PDRUNCFG & (0x00000048));
mbed_official 510:bb3effbb3493 54
mbed_official 510:bb3effbb3493 55 // Power up same as before powerdown
mbed_official 510:bb3effbb3493 56 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
mbed_official 510:bb3effbb3493 57
mbed_official 510:bb3effbb3493 58 // All interrupts can wake
mbed_official 510:bb3effbb3493 59 LPC_SYSCON->STARTERP0 = 0xFF;
mbed_official 510:bb3effbb3493 60 LPC_SYSCON->STARTERP1 = 0xFFFFFFFF;
mbed_official 510:bb3effbb3493 61
mbed_official 510:bb3effbb3493 62 // SRC[SLEEPDEEP] set to 1 = deep sleep
mbed_official 510:bb3effbb3493 63 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
mbed_official 510:bb3effbb3493 64
mbed_official 510:bb3effbb3493 65 // wait for interrupt
mbed_official 510:bb3effbb3493 66 __WFI();
mbed_official 510:bb3effbb3493 67 }
mbed_official 510:bb3effbb3493 68
mbed_official 510:bb3effbb3493 69 #endif