Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_K66F/drivers/fsl_ewm.c@144:ef7eb2e8f9f7, 2016-09-02 (annotated)

Committer:
<>
Date:
Fri Sep 02 15:07:44 2016 +0100
Revision:
144:ef7eb2e8f9f7
This updates the lib to the mbed lib v125

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /*
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2015, Freescale Semiconductor, Inc.
<> 144:ef7eb2e8f9f7 3 * All rights reserved.
<> 144:ef7eb2e8f9f7 4 *
<> 144:ef7eb2e8f9f7 5 * Redistribution and use in source and binary forms, with or without modification,
<> 144:ef7eb2e8f9f7 6 * are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * o Redistributions of source code must retain the above copyright notice, this list
<> 144:ef7eb2e8f9f7 9 * of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 10 *
<> 144:ef7eb2e8f9f7 11 * o Redistributions in binary form must reproduce the above copyright notice, this
<> 144:ef7eb2e8f9f7 12 * list of conditions and the following disclaimer in the documentation and/or
<> 144:ef7eb2e8f9f7 13 * other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 14 *
<> 144:ef7eb2e8f9f7 15 * o Neither the name of Freescale Semiconductor, Inc. nor the names of its
<> 144:ef7eb2e8f9f7 16 * contributors may be used to endorse or promote products derived from this
<> 144:ef7eb2e8f9f7 17 * software without specific prior written permission.
<> 144:ef7eb2e8f9f7 18 *
<> 144:ef7eb2e8f9f7 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
<> 144:ef7eb2e8f9f7 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
<> 144:ef7eb2e8f9f7 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
<> 144:ef7eb2e8f9f7 23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
<> 144:ef7eb2e8f9f7 24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
<> 144:ef7eb2e8f9f7 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
<> 144:ef7eb2e8f9f7 26 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
<> 144:ef7eb2e8f9f7 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
<> 144:ef7eb2e8f9f7 28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 29 */
<> 144:ef7eb2e8f9f7 30
<> 144:ef7eb2e8f9f7 31 #include "fsl_ewm.h"
<> 144:ef7eb2e8f9f7 32
<> 144:ef7eb2e8f9f7 33 /*******************************************************************************
<> 144:ef7eb2e8f9f7 34 * Code
<> 144:ef7eb2e8f9f7 35 ******************************************************************************/
<> 144:ef7eb2e8f9f7 36
<> 144:ef7eb2e8f9f7 37 void EWM_Init(EWM_Type *base, const ewm_config_t *config)
<> 144:ef7eb2e8f9f7 38 {
<> 144:ef7eb2e8f9f7 39 assert(config);
<> 144:ef7eb2e8f9f7 40
<> 144:ef7eb2e8f9f7 41 uint32_t value = 0U;
<> 144:ef7eb2e8f9f7 42
<> 144:ef7eb2e8f9f7 43 CLOCK_EnableClock(kCLOCK_Ewm0);
<> 144:ef7eb2e8f9f7 44 value = EWM_CTRL_EWMEN(config->enableEwm) | EWM_CTRL_ASSIN(config->setInputAssertLogic) |
<> 144:ef7eb2e8f9f7 45 EWM_CTRL_INEN(config->enableEwmInput) | EWM_CTRL_INTEN(config->enableInterrupt);
<> 144:ef7eb2e8f9f7 46 #if defined(FSL_FEATURE_EWM_HAS_PRESCALER) && FSL_FEATURE_EWM_HAS_PRESCALER
<> 144:ef7eb2e8f9f7 47 base->CLKPRESCALER = config->prescaler;
<> 144:ef7eb2e8f9f7 48 #endif /* FSL_FEATURE_EWM_HAS_PRESCALER */
<> 144:ef7eb2e8f9f7 49
<> 144:ef7eb2e8f9f7 50 #if defined(FSL_FEATURE_EWM_HAS_CLOCK_SELECT) && FSL_FEATURE_EWM_HAS_CLOCK_SELECT
<> 144:ef7eb2e8f9f7 51 base->CLKCTRL = config->clockSource;
<> 144:ef7eb2e8f9f7 52 #endif /* FSL_FEATURE_EWM_HAS_CLOCK_SELECT*/
<> 144:ef7eb2e8f9f7 53
<> 144:ef7eb2e8f9f7 54 base->CMPL = config->compareLowValue;
<> 144:ef7eb2e8f9f7 55 base->CMPH = config->compareHighValue;
<> 144:ef7eb2e8f9f7 56 base->CTRL = value;
<> 144:ef7eb2e8f9f7 57 }
<> 144:ef7eb2e8f9f7 58
<> 144:ef7eb2e8f9f7 59 void EWM_Deinit(EWM_Type *base)
<> 144:ef7eb2e8f9f7 60 {
<> 144:ef7eb2e8f9f7 61 EWM_DisableInterrupts(base, kEWM_InterruptEnable);
<> 144:ef7eb2e8f9f7 62 CLOCK_DisableClock(kCLOCK_Ewm0);
<> 144:ef7eb2e8f9f7 63 }
<> 144:ef7eb2e8f9f7 64
<> 144:ef7eb2e8f9f7 65 void EWM_GetDefaultConfig(ewm_config_t *config)
<> 144:ef7eb2e8f9f7 66 {
<> 144:ef7eb2e8f9f7 67 assert(config);
<> 144:ef7eb2e8f9f7 68
<> 144:ef7eb2e8f9f7 69 config->enableEwm = true;
<> 144:ef7eb2e8f9f7 70 config->enableEwmInput = false;
<> 144:ef7eb2e8f9f7 71 config->setInputAssertLogic = false;
<> 144:ef7eb2e8f9f7 72 config->enableInterrupt = false;
<> 144:ef7eb2e8f9f7 73 #if defined(FSL_FEATURE_EWM_HAS_CLOCK_SELECT) && FSL_FEATURE_EWM_HAS_CLOCK_SELECT
<> 144:ef7eb2e8f9f7 74 config->clockSource = kEWM_LpoClockSource0;
<> 144:ef7eb2e8f9f7 75 #endif /* FSL_FEATURE_EWM_HAS_CLOCK_SELECT*/
<> 144:ef7eb2e8f9f7 76 #if defined(FSL_FEATURE_EWM_HAS_PRESCALER) && FSL_FEATURE_EWM_HAS_PRESCALER
<> 144:ef7eb2e8f9f7 77 config->prescaler = 0U;
<> 144:ef7eb2e8f9f7 78 #endif /* FSL_FEATURE_EWM_HAS_PRESCALER */
<> 144:ef7eb2e8f9f7 79 config->compareLowValue = 0U;
<> 144:ef7eb2e8f9f7 80 config->compareHighValue = 0xFEU;
<> 144:ef7eb2e8f9f7 81 }
<> 144:ef7eb2e8f9f7 82
<> 144:ef7eb2e8f9f7 83 void EWM_Refresh(EWM_Type *base)
<> 144:ef7eb2e8f9f7 84 {
<> 144:ef7eb2e8f9f7 85 uint32_t primaskValue = 0U;
<> 144:ef7eb2e8f9f7 86
<> 144:ef7eb2e8f9f7 87 /* Disable the global interrupt to protect refresh sequence */
<> 144:ef7eb2e8f9f7 88 primaskValue = DisableGlobalIRQ();
<> 144:ef7eb2e8f9f7 89 base->SERV = (uint8_t)0xB4U;
<> 144:ef7eb2e8f9f7 90 base->SERV = (uint8_t)0x2CU;
<> 144:ef7eb2e8f9f7 91 EnableGlobalIRQ(primaskValue);
<> 144:ef7eb2e8f9f7 92 }