mbed library sources: Modified to operate FRDM-KL25Z at 48MHz from internal 32kHz oscillator (nothing else changed).
Fork of mbed-src by
The only file that changed is: mbed-src-FLL48/targets/cmsis/TARGET_Freescale/TARGET_KL25Z/system_MKL25Z4.h
targets/hal/TARGET_NXP/TARGET_LPC11CXX/sleep.c@20:4263a77256ae, 2013-09-10 (annotated)
- Committer:
- bogdanm
- Date:
- Tue Sep 10 15:14:19 2013 +0300
- Revision:
- 20:4263a77256ae
- Child:
- 27:3315632cc01d
Sync with git revision 171dda705c947bf910926a0b73d6a4797802554d
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bogdanm | 20:4263a77256ae | 1 | /* mbed Microcontroller Library |
bogdanm | 20:4263a77256ae | 2 | * Copyright (c) 2006-2013 ARM Limited |
bogdanm | 20:4263a77256ae | 3 | * |
bogdanm | 20:4263a77256ae | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
bogdanm | 20:4263a77256ae | 5 | * you may not use this file except in compliance with the License. |
bogdanm | 20:4263a77256ae | 6 | * You may obtain a copy of the License at |
bogdanm | 20:4263a77256ae | 7 | * |
bogdanm | 20:4263a77256ae | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
bogdanm | 20:4263a77256ae | 9 | * |
bogdanm | 20:4263a77256ae | 10 | * Unless required by applicable law or agreed to in writing, software |
bogdanm | 20:4263a77256ae | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
bogdanm | 20:4263a77256ae | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
bogdanm | 20:4263a77256ae | 13 | * See the License for the specific language governing permissions and |
bogdanm | 20:4263a77256ae | 14 | * limitations under the License. |
bogdanm | 20:4263a77256ae | 15 | */ |
bogdanm | 20:4263a77256ae | 16 | #include "sleep_api.h" |
bogdanm | 20:4263a77256ae | 17 | #include "cmsis.h" |
bogdanm | 20:4263a77256ae | 18 | #include "mbed_interface.h" |
bogdanm | 20:4263a77256ae | 19 | |
bogdanm | 20:4263a77256ae | 20 | void sleep(void) { |
bogdanm | 20:4263a77256ae | 21 | // ensure debug is disconnected |
bogdanm | 20:4263a77256ae | 22 | mbed_interface_disconnect(); |
bogdanm | 20:4263a77256ae | 23 | |
bogdanm | 20:4263a77256ae | 24 | // PCON[DPDEN] set to sleep |
bogdanm | 20:4263a77256ae | 25 | LPC_PMU->PCON = 0x0; |
bogdanm | 20:4263a77256ae | 26 | |
bogdanm | 20:4263a77256ae | 27 | // SRC[SLEEPDEEP] set to 0 = sleep |
bogdanm | 20:4263a77256ae | 28 | SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk; |
bogdanm | 20:4263a77256ae | 29 | |
bogdanm | 20:4263a77256ae | 30 | // wait for interrupt |
bogdanm | 20:4263a77256ae | 31 | __WFI(); |
bogdanm | 20:4263a77256ae | 32 | } |
bogdanm | 20:4263a77256ae | 33 | |
bogdanm | 20:4263a77256ae | 34 | /* |
bogdanm | 20:4263a77256ae | 35 | * The mbed lpc1768 does not support the deepsleep mode |
bogdanm | 20:4263a77256ae | 36 | * as a debugger is connected to it (the mbed interface). |
bogdanm | 20:4263a77256ae | 37 | * |
bogdanm | 20:4263a77256ae | 38 | * As mentionned in an application note from NXP: |
bogdanm | 20:4263a77256ae | 39 | * |
bogdanm | 20:4263a77256ae | 40 | * http://www.po-star.com/public/uploads/20120319123122_141.pdf |
bogdanm | 20:4263a77256ae | 41 | * |
bogdanm | 20:4263a77256ae | 42 | * {{{ |
bogdanm | 20:4263a77256ae | 43 | * The user should be aware of certain limitations during debugging. |
bogdanm | 20:4263a77256ae | 44 | * The most important is that, due to limitations of the Cortex-M3 |
bogdanm | 20:4263a77256ae | 45 | * integration, the LPC17xx cannot wake up in the usual manner from |
bogdanm | 20:4263a77256ae | 46 | * Deep Sleep and Power-down modes. It is recommended not to use these |
bogdanm | 20:4263a77256ae | 47 | * modes during debug. Once an application is downloaded via JTAG/SWD |
bogdanm | 20:4263a77256ae | 48 | * interface, the USB to SWD/JTAG debug adapter (Keil ULINK2 for example) |
bogdanm | 20:4263a77256ae | 49 | * should be removed from the target board, and thereafter, power cycle |
bogdanm | 20:4263a77256ae | 50 | * the LPC17xx to allow wake-up from deep sleep and power-down modes |
bogdanm | 20:4263a77256ae | 51 | * }}} |
bogdanm | 20:4263a77256ae | 52 | * |
bogdanm | 20:4263a77256ae | 53 | * As the interface firmware does not reset the target when a |
bogdanm | 20:4263a77256ae | 54 | * mbed_interface_disconnect() semihosting call is made, the |
bogdanm | 20:4263a77256ae | 55 | * core cannot wake-up from deepsleep. |
bogdanm | 20:4263a77256ae | 56 | * |
bogdanm | 20:4263a77256ae | 57 | * We treat a deepsleep() as a normal sleep(). |
bogdanm | 20:4263a77256ae | 58 | */ |
bogdanm | 20:4263a77256ae | 59 | |
bogdanm | 20:4263a77256ae | 60 | void deepsleep(void) { |
bogdanm | 20:4263a77256ae | 61 | // ensure debug is disconnected |
bogdanm | 20:4263a77256ae | 62 | mbed_interface_disconnect(); |
bogdanm | 20:4263a77256ae | 63 | |
bogdanm | 20:4263a77256ae | 64 | // PCON[DPDEN] set to deepsleep |
bogdanm | 20:4263a77256ae | 65 | LPC_PMU->PCON = 0x2; |
bogdanm | 20:4263a77256ae | 66 | |
bogdanm | 20:4263a77256ae | 67 | // SRC[SLEEPDEEP] set to 1 = deep sleep |
bogdanm | 20:4263a77256ae | 68 | SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk; |
bogdanm | 20:4263a77256ae | 69 | |
bogdanm | 20:4263a77256ae | 70 | // Power up everything after powerdown |
bogdanm | 20:4263a77256ae | 71 | LPC_SYSCON->PDAWAKECFG &= 0xFFFFF800; |
bogdanm | 20:4263a77256ae | 72 | |
bogdanm | 20:4263a77256ae | 73 | // wait for interrupt |
bogdanm | 20:4263a77256ae | 74 | __WFI(); |
bogdanm | 20:4263a77256ae | 75 | } |