115 lines
3.9 KiB
C
115 lines
3.9 KiB
C
/*
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* o Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* o Neither the name of Freescale Semiconductor, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "fsl_debug_console.h"
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#include "board.h"
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#include "fsl_pit.h"
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#include "pin_mux.h"
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#include "clock_config.h"
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/*******************************************************************************
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* Definitions
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******************************************************************************/
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#define PIT_LED_HANDLER PIT0_IRQHandler
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#define PIT_IRQ_ID PIT0_IRQn
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/* Get source clock for PIT driver */
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#define PIT_SOURCE_CLOCK CLOCK_GetFreq(kCLOCK_BusClk)
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#define LED_INIT() LED_RED_INIT(LOGIC_LED_ON)
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#define LED_TOGGLE() LED_RED_TOGGLE()
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/*******************************************************************************
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* Prototypes
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******************************************************************************/
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/*******************************************************************************
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* Variables
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******************************************************************************/
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volatile bool pitIsrFlag = false;
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/*******************************************************************************
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* Code
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******************************************************************************/
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void PIT_LED_HANDLER(void)
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{
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/* Clear interrupt flag.*/
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PIT_ClearStatusFlags(PIT, kPIT_Chnl_0, PIT_TFLG_TIF_MASK);
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pitIsrFlag = true;
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}
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/*!
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* @brief Main function
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*/
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int main(void)
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{
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/* Structure of initialize PIT */
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pit_config_t pitConfig;
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/* Initialize and enable LED */
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LED_INIT();
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/* Board pin, clock, debug console init */
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BOARD_InitPins();
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BOARD_BootClockRUN();
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BOARD_InitDebugConsole();
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/*
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* pitConfig.enableRunInDebug = false;
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*/
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PIT_GetDefaultConfig(&pitConfig);
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/* Init pit module */
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PIT_Init(PIT, &pitConfig);
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/* Set timer period for channel 0 */
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PIT_SetTimerPeriod(PIT, kPIT_Chnl_0, USEC_TO_COUNT(1000000U, PIT_SOURCE_CLOCK));
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/* Enable timer interrupts for channel 0 */
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PIT_EnableInterrupts(PIT, kPIT_Chnl_0, kPIT_TimerInterruptEnable);
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/* Enable at the NVIC */
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EnableIRQ(PIT_IRQ_ID);
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/* Start channel 0 */
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PRINTF("\r\nStarting channel No.0 ...");
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PIT_StartTimer(PIT, kPIT_Chnl_0);
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while (true)
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{
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/* Check whether occur interupt and toggle LED */
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if (true == pitIsrFlag)
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{
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PRINTF("\r\n Channel No.0 interrupt is occured !");
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LED_TOGGLE();
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pitIsrFlag = false;
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}
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}
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}
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