Geremia G / mbed-src

- fix F411 F334 systeminit when HSI used - portinout always read IDR regardless of port direction

Fork of mbed-src by mbed official

targets/hal/TARGET_NXP/TARGET_LPC176X/sleep.c@332:e299ae530e63, 2014-09-27 (annotated)

Committer:
Geremia
Date:
Sat Sep 27 11:16:28 2014 +0000
Revision:
332:e299ae530e63
Parent:
79:6fdc4ea80ae0 
- fix F411 F334 systeminit when HSI used; - STMs PortInOut port.read() always read input data register (real external pin state) even if direction is output (same as other platforms)

Who changed what in which revision?

UserRevisionLine numberNew 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) {
mbed_official 79:6fdc4ea80ae0 21
mbed_official 79:6fdc4ea80ae0 22 #if (DEVICE_SEMIHOST == 1)
emilmont 10:3bc89ef62ce7 23 // ensure debug is disconnected
emilmont 10:3bc89ef62ce7 24 mbed_interface_disconnect();
mbed_official 79:6fdc4ea80ae0 25 #endif
mbed_official 79:6fdc4ea80ae0 26
emilmont 10:3bc89ef62ce7 27 // PCON[PD] set to sleep
emilmont 10:3bc89ef62ce7 28 LPC_SC->PCON = 0x0;
emilmont 10:3bc89ef62ce7 29
emilmont 10:3bc89ef62ce7 30 // SRC[SLEEPDEEP] set to 0 = sleep
emilmont 10:3bc89ef62ce7 31 SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
emilmont 10:3bc89ef62ce7 32
emilmont 10:3bc89ef62ce7 33 // wait for interrupt
emilmont 10:3bc89ef62ce7 34 __WFI();
emilmont 10:3bc89ef62ce7 35 }
emilmont 10:3bc89ef62ce7 36
emilmont 10:3bc89ef62ce7 37 /*
emilmont 10:3bc89ef62ce7 38 * The mbed lpc1768 does not support the deepsleep mode
emilmont 10:3bc89ef62ce7 39 * as a debugger is connected to it (the mbed interface).
emilmont 10:3bc89ef62ce7 40 *
emilmont 10:3bc89ef62ce7 41 * As mentionned in an application note from NXP:
emilmont 10:3bc89ef62ce7 42 *
emilmont 10:3bc89ef62ce7 43 * http://www.po-star.com/public/uploads/20120319123122_141.pdf
emilmont 10:3bc89ef62ce7 44 *
emilmont 10:3bc89ef62ce7 45 * {{{
emilmont 10:3bc89ef62ce7 46 * The user should be aware of certain limitations during debugging.
emilmont 10:3bc89ef62ce7 47 * The most important is that, due to limitations of the Cortex-M3
emilmont 10:3bc89ef62ce7 48 * integration, the LPC17xx cannot wake up in the usual manner from
emilmont 10:3bc89ef62ce7 49 * Deep Sleep and Power-down modes. It is recommended not to use these
emilmont 10:3bc89ef62ce7 50 * modes during debug. Once an application is downloaded via JTAG/SWD
emilmont 10:3bc89ef62ce7 51 * interface, the USB to SWD/JTAG debug adapter (Keil ULINK2 for example)
emilmont 10:3bc89ef62ce7 52 * should be removed from the target board, and thereafter, power cycle
emilmont 10:3bc89ef62ce7 53 * the LPC17xx to allow wake-up from deep sleep and power-down modes
emilmont 10:3bc89ef62ce7 54 * }}}
emilmont 10:3bc89ef62ce7 55 *
emilmont 10:3bc89ef62ce7 56 * As the interface firmware does not reset the target when a
emilmont 10:3bc89ef62ce7 57 * mbed_interface_disconnect() semihosting call is made, the
emilmont 10:3bc89ef62ce7 58 * core cannot wake-up from deepsleep.
emilmont 10:3bc89ef62ce7 59 *
emilmont 10:3bc89ef62ce7 60 * We treat a deepsleep() as a normal sleep().
emilmont 10:3bc89ef62ce7 61 */
emilmont 10:3bc89ef62ce7 62
emilmont 10:3bc89ef62ce7 63 void deepsleep(void) {
mbed_official 79:6fdc4ea80ae0 64
mbed_official 79:6fdc4ea80ae0 65 #if (DEVICE_SEMIHOST == 1)
emilmont 10:3bc89ef62ce7 66 // ensure debug is disconnected
emilmont 10:3bc89ef62ce7 67 mbed_interface_disconnect();
mbed_official 79:6fdc4ea80ae0 68 #endif
emilmont 10:3bc89ef62ce7 69
emilmont 10:3bc89ef62ce7 70 // PCON[PD] set to deepsleep
emilmont 10:3bc89ef62ce7 71 sleep();
emilmont 10:3bc89ef62ce7 72 }