Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_NXP/TARGET_LPC82X/sleep.c@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #include "sleep_api.h"
<> 144:ef7eb2e8f9f7 17 #include "cmsis.h"
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19
<> 144:ef7eb2e8f9f7 20 //#define DEEPSLEEP
<> 144:ef7eb2e8f9f7 21 #define POWERDOWN
<> 144:ef7eb2e8f9f7 22
<> 144:ef7eb2e8f9f7 23 void sleep(void)
<> 144:ef7eb2e8f9f7 24 {
<> 144:ef7eb2e8f9f7 25 //Normal sleep mode for PCON:
<> 144:ef7eb2e8f9f7 26 LPC_PMU->PCON &= ~0x03;
<> 144:ef7eb2e8f9f7 27
<> 144:ef7eb2e8f9f7 28 //Normal sleep mode for ARM core:
<> 144:ef7eb2e8f9f7 29 SCB->SCR = 0;
<> 144:ef7eb2e8f9f7 30
<> 144:ef7eb2e8f9f7 31 //And go to sleep
<> 144:ef7eb2e8f9f7 32 __WFI();
<> 144:ef7eb2e8f9f7 33 }
<> 144:ef7eb2e8f9f7 34
<> 144:ef7eb2e8f9f7 35 // Deepsleep/powerdown modes assume the device is configured to use its internal RC oscillator directly
<> 144:ef7eb2e8f9f7 36
<> 144:ef7eb2e8f9f7 37 void deepsleep(void)
<> 144:ef7eb2e8f9f7 38 {
<> 144:ef7eb2e8f9f7 39 //Deep sleep in PCON
<> 144:ef7eb2e8f9f7 40 LPC_PMU->PCON &= ~0x03;
<> 144:ef7eb2e8f9f7 41
<> 144:ef7eb2e8f9f7 42 #if defined(DEEPSLEEP)
<> 144:ef7eb2e8f9f7 43 LPC_PMU->PCON |= 0x01;
<> 144:ef7eb2e8f9f7 44 #elif defined(POWERDOWN)
<> 144:ef7eb2e8f9f7 45 LPC_PMU->PCON |= 0x02;
<> 144:ef7eb2e8f9f7 46 #endif
<> 144:ef7eb2e8f9f7 47
<> 144:ef7eb2e8f9f7 48 //If brownout detection and WDT are enabled, keep them enabled during sleep
<> 144:ef7eb2e8f9f7 49 LPC_SYSCON->PDSLEEPCFG = LPC_SYSCON->PDRUNCFG;
<> 144:ef7eb2e8f9f7 50
<> 144:ef7eb2e8f9f7 51 //After wakeup same stuff as currently enabled:
<> 144:ef7eb2e8f9f7 52 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
<> 144:ef7eb2e8f9f7 53
<> 144:ef7eb2e8f9f7 54 //All interrupts may wake up:
<> 144:ef7eb2e8f9f7 55 LPC_SYSCON->STARTERP0 = 0xFF;
<> 144:ef7eb2e8f9f7 56 LPC_SYSCON->STARTERP1 = 0xFFFF;
<> 144:ef7eb2e8f9f7 57
<> 144:ef7eb2e8f9f7 58 //Deep sleep for ARM core:
<> 144:ef7eb2e8f9f7 59 SCB->SCR = 1<<2;
<> 144:ef7eb2e8f9f7 60
<> 144:ef7eb2e8f9f7 61 __WFI();
<> 144:ef7eb2e8f9f7 62 }