Mouse code for the MacroRat
mbed-dev/targets/TARGET_NXP/TARGET_LPC176X/sleep.c@18:6a4db94011d3, 2017-05-14 (annotated)
- Committer:
- sahilmgandhi
- Date:
- Sun May 14 23:18:57 2017 +0000
- Revision:
- 18:6a4db94011d3
Publishing again
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
sahilmgandhi | 18:6a4db94011d3 | 1 | /* mbed Microcontroller Library |
sahilmgandhi | 18:6a4db94011d3 | 2 | * Copyright (c) 2006-2013 ARM Limited |
sahilmgandhi | 18:6a4db94011d3 | 3 | * |
sahilmgandhi | 18:6a4db94011d3 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
sahilmgandhi | 18:6a4db94011d3 | 5 | * you may not use this file except in compliance with the License. |
sahilmgandhi | 18:6a4db94011d3 | 6 | * You may obtain a copy of the License at |
sahilmgandhi | 18:6a4db94011d3 | 7 | * |
sahilmgandhi | 18:6a4db94011d3 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
sahilmgandhi | 18:6a4db94011d3 | 9 | * |
sahilmgandhi | 18:6a4db94011d3 | 10 | * Unless required by applicable law or agreed to in writing, software |
sahilmgandhi | 18:6a4db94011d3 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
sahilmgandhi | 18:6a4db94011d3 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
sahilmgandhi | 18:6a4db94011d3 | 13 | * See the License for the specific language governing permissions and |
sahilmgandhi | 18:6a4db94011d3 | 14 | * limitations under the License. |
sahilmgandhi | 18:6a4db94011d3 | 15 | */ |
sahilmgandhi | 18:6a4db94011d3 | 16 | #include "sleep_api.h" |
sahilmgandhi | 18:6a4db94011d3 | 17 | #include "cmsis.h" |
sahilmgandhi | 18:6a4db94011d3 | 18 | #include "mbed_interface.h" |
sahilmgandhi | 18:6a4db94011d3 | 19 | |
sahilmgandhi | 18:6a4db94011d3 | 20 | void hal_sleep(void) { |
sahilmgandhi | 18:6a4db94011d3 | 21 | |
sahilmgandhi | 18:6a4db94011d3 | 22 | #if (DEVICE_SEMIHOST == 1) |
sahilmgandhi | 18:6a4db94011d3 | 23 | // ensure debug is disconnected |
sahilmgandhi | 18:6a4db94011d3 | 24 | mbed_interface_disconnect(); |
sahilmgandhi | 18:6a4db94011d3 | 25 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 26 | |
sahilmgandhi | 18:6a4db94011d3 | 27 | // PCON[PD] set to sleep |
sahilmgandhi | 18:6a4db94011d3 | 28 | LPC_SC->PCON = 0x0; |
sahilmgandhi | 18:6a4db94011d3 | 29 | |
sahilmgandhi | 18:6a4db94011d3 | 30 | // SRC[SLEEPDEEP] set to 0 = sleep |
sahilmgandhi | 18:6a4db94011d3 | 31 | SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 32 | |
sahilmgandhi | 18:6a4db94011d3 | 33 | // wait for interrupt |
sahilmgandhi | 18:6a4db94011d3 | 34 | __WFI(); |
sahilmgandhi | 18:6a4db94011d3 | 35 | } |
sahilmgandhi | 18:6a4db94011d3 | 36 | |
sahilmgandhi | 18:6a4db94011d3 | 37 | /* |
sahilmgandhi | 18:6a4db94011d3 | 38 | * The mbed lpc1768 does not support the deepsleep mode |
sahilmgandhi | 18:6a4db94011d3 | 39 | * as a debugger is connected to it (the mbed interface). |
sahilmgandhi | 18:6a4db94011d3 | 40 | * |
sahilmgandhi | 18:6a4db94011d3 | 41 | * As mentionned in an application note from NXP: |
sahilmgandhi | 18:6a4db94011d3 | 42 | * |
sahilmgandhi | 18:6a4db94011d3 | 43 | * http://www.po-star.com/public/uploads/20120319123122_141.pdf |
sahilmgandhi | 18:6a4db94011d3 | 44 | * |
sahilmgandhi | 18:6a4db94011d3 | 45 | * {{{ |
sahilmgandhi | 18:6a4db94011d3 | 46 | * The user should be aware of certain limitations during debugging. |
sahilmgandhi | 18:6a4db94011d3 | 47 | * The most important is that, due to limitations of the Cortex-M3 |
sahilmgandhi | 18:6a4db94011d3 | 48 | * integration, the LPC17xx cannot wake up in the usual manner from |
sahilmgandhi | 18:6a4db94011d3 | 49 | * Deep Sleep and Power-down modes. It is recommended not to use these |
sahilmgandhi | 18:6a4db94011d3 | 50 | * modes during debug. Once an application is downloaded via JTAG/SWD |
sahilmgandhi | 18:6a4db94011d3 | 51 | * interface, the USB to SWD/JTAG debug adapter (Keil ULINK2 for example) |
sahilmgandhi | 18:6a4db94011d3 | 52 | * should be removed from the target board, and thereafter, power cycle |
sahilmgandhi | 18:6a4db94011d3 | 53 | * the LPC17xx to allow wake-up from deep sleep and power-down modes |
sahilmgandhi | 18:6a4db94011d3 | 54 | * }}} |
sahilmgandhi | 18:6a4db94011d3 | 55 | * |
sahilmgandhi | 18:6a4db94011d3 | 56 | * As the interface firmware does not reset the target when a |
sahilmgandhi | 18:6a4db94011d3 | 57 | * mbed_interface_disconnect() semihosting call is made, the |
sahilmgandhi | 18:6a4db94011d3 | 58 | * core cannot wake-up from deepsleep. |
sahilmgandhi | 18:6a4db94011d3 | 59 | * |
sahilmgandhi | 18:6a4db94011d3 | 60 | * We treat a deepsleep() as a normal sleep(). |
sahilmgandhi | 18:6a4db94011d3 | 61 | */ |
sahilmgandhi | 18:6a4db94011d3 | 62 | |
sahilmgandhi | 18:6a4db94011d3 | 63 | void hal_deepsleep(void) { |
sahilmgandhi | 18:6a4db94011d3 | 64 | |
sahilmgandhi | 18:6a4db94011d3 | 65 | #if (DEVICE_SEMIHOST == 1) |
sahilmgandhi | 18:6a4db94011d3 | 66 | // ensure debug is disconnected |
sahilmgandhi | 18:6a4db94011d3 | 67 | mbed_interface_disconnect(); |
sahilmgandhi | 18:6a4db94011d3 | 68 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 69 | |
sahilmgandhi | 18:6a4db94011d3 | 70 | // PCON[PD] set to deepsleep |
sahilmgandhi | 18:6a4db94011d3 | 71 | hal_sleep(); |
sahilmgandhi | 18:6a4db94011d3 | 72 | } |