Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/emlib/src/em_int.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 /**************************************************************************//**
<> 144:ef7eb2e8f9f7 2 * @file em_int.c
<> 144:ef7eb2e8f9f7 3 * @brief Interrupt enable/disable unit API
<> 144:ef7eb2e8f9f7 4 * @version 4.2.1
<> 144:ef7eb2e8f9f7 5 ******************************************************************************
<> 144:ef7eb2e8f9f7 6 * @section License
<> 144:ef7eb2e8f9f7 7 * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
<> 144:ef7eb2e8f9f7 8 *******************************************************************************
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Permission is granted to anyone to use this software for any purpose,
<> 144:ef7eb2e8f9f7 11 * including commercial applications, and to alter it and redistribute it
<> 144:ef7eb2e8f9f7 12 * freely, subject to the following restrictions:
<> 144:ef7eb2e8f9f7 13 *
<> 144:ef7eb2e8f9f7 14 * 1. The origin of this software must not be misrepresented; you must not
<> 144:ef7eb2e8f9f7 15 * claim that you wrote the original software.
<> 144:ef7eb2e8f9f7 16 * 2. Altered source versions must be plainly marked as such, and must not be
<> 144:ef7eb2e8f9f7 17 * misrepresented as being the original software.
<> 144:ef7eb2e8f9f7 18 * 3. This notice may not be removed or altered from any source distribution.
<> 144:ef7eb2e8f9f7 19 *
<> 144:ef7eb2e8f9f7 20 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
<> 144:ef7eb2e8f9f7 21 * obligation to support this Software. Silicon Labs is providing the
<> 144:ef7eb2e8f9f7 22 * Software "AS IS", with no express or implied warranties of any kind,
<> 144:ef7eb2e8f9f7 23 * including, but not limited to, any implied warranties of merchantability
<> 144:ef7eb2e8f9f7 24 * or fitness for any particular purpose or warranties against infringement
<> 144:ef7eb2e8f9f7 25 * of any proprietary rights of a third party.
<> 144:ef7eb2e8f9f7 26 *
<> 144:ef7eb2e8f9f7 27 * Silicon Labs will not be liable for any consequential, incidental, or
<> 144:ef7eb2e8f9f7 28 * special damages, or any other relief, or for any claim by any third party,
<> 144:ef7eb2e8f9f7 29 * arising from your use of this Software.
<> 144:ef7eb2e8f9f7 30 *
<> 144:ef7eb2e8f9f7 31 ******************************************************************************/
<> 144:ef7eb2e8f9f7 32
<> 144:ef7eb2e8f9f7 33 #include <stdint.h>
<> 144:ef7eb2e8f9f7 34 #include "em_int.h"
<> 144:ef7eb2e8f9f7 35
<> 144:ef7eb2e8f9f7 36 /***************************************************************************//**
<> 144:ef7eb2e8f9f7 37 * @addtogroup EM_Library
<> 144:ef7eb2e8f9f7 38 * @{
<> 144:ef7eb2e8f9f7 39 ******************************************************************************/
<> 144:ef7eb2e8f9f7 40
<> 144:ef7eb2e8f9f7 41 /***************************************************************************//**
<> 144:ef7eb2e8f9f7 42 * @addtogroup INT
<> 144:ef7eb2e8f9f7 43 * @brief Safe nesting of interrupt disable/enable API
<> 144:ef7eb2e8f9f7 44 * @{
<> 144:ef7eb2e8f9f7 45 * @details
<> 144:ef7eb2e8f9f7 46 * This module contains functions to safely disable and enable interrupts
<> 144:ef7eb2e8f9f7 47 * at CPU level. INT_Disable() disables interrupts globally and increments a lock
<> 144:ef7eb2e8f9f7 48 * level counter (counting semaphore). INT_Enable() decrements the lock level
<> 144:ef7eb2e8f9f7 49 * counter and enable interrupts if the counter reaches zero.
<> 144:ef7eb2e8f9f7 50 *
<> 144:ef7eb2e8f9f7 51 * These functions would normally be used to secure critical regions, and
<> 144:ef7eb2e8f9f7 52 * to make sure that a critical section that calls into another critical
<> 144:ef7eb2e8f9f7 53 * section does not unintentionally terminate the callee critical section.
<> 144:ef7eb2e8f9f7 54 *
<> 144:ef7eb2e8f9f7 55 * These functions should also be used inside interrupt handlers:
<> 144:ef7eb2e8f9f7 56 * @verbatim
<> 144:ef7eb2e8f9f7 57 * void SysTick_Handler(void)
<> 144:ef7eb2e8f9f7 58 * {
<> 144:ef7eb2e8f9f7 59 * INT_Disable();
<> 144:ef7eb2e8f9f7 60 * .
<> 144:ef7eb2e8f9f7 61 * .
<> 144:ef7eb2e8f9f7 62 * .
<> 144:ef7eb2e8f9f7 63 * INT_Enable();
<> 144:ef7eb2e8f9f7 64 * }
<> 144:ef7eb2e8f9f7 65 * @endverbatim
<> 144:ef7eb2e8f9f7 66 ******************************************************************************/
<> 144:ef7eb2e8f9f7 67
<> 144:ef7eb2e8f9f7 68 /** Interrupt lock level counter. Set to zero initially as we normally enter
<> 144:ef7eb2e8f9f7 69 * main with interrupts enabled */
<> 144:ef7eb2e8f9f7 70 uint32_t INT_LockCnt = 0;
<> 144:ef7eb2e8f9f7 71
<> 144:ef7eb2e8f9f7 72 /** @} (end addtogroup INT) */
<> 144:ef7eb2e8f9f7 73 /** @} (end addtogroup EM_Library) */