92 lines
3.0 KiB
C
92 lines
3.0 KiB
C
/*
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* Copyright (c) 2016, Freescale Semiconductor, Inc.
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* Copyright 2016-2017 NXP
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* All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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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_sctimer.h"
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#include "pin_mux.h"
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#include <stdbool.h>
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/*******************************************************************************
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* Definitions
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******************************************************************************/
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#define SCTIMER_CLK_FREQ CLOCK_GetFreq(kCLOCK_BusClk)
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#define DEMO_FIRST_SCTIMER_OUT kSCTIMER_Out_4
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#define DEMO_SECOND_SCTIMER_OUT kSCTIMER_Out_2
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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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/*******************************************************************************
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* Code
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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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sctimer_config_t sctimerInfo;
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sctimer_pwm_signal_param_t pwmParam;
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uint32_t event;
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uint32_t sctimerClock;
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/* Board pin, clock, debug console init */
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/* attach 12 MHz clock to USART0 (debug console) */
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CLOCK_AttachClk(BOARD_DEBUG_UART_CLK_ATTACH);
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BOARD_InitPins();
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BOARD_BootClockPLL150M(); /* Rev B device can only support max core frequency to 96Mhz.
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Rev C device can support 150Mhz,use BOARD_BootClockPLL150M() to boot core to 150Mhz.
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DEVICE_ID1 register in SYSCON shows the device version.
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More details please refer to user manual and errata. */
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BOARD_InitDebugConsole();
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sctimerClock = SCTIMER_CLK_FREQ;
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/* Print a note to terminal */
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PRINTF("\r\nSCTimer example to output 2 center-aligned PWM signals\r\n");
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PRINTF("\r\nProbe the signal using an oscilloscope");
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SCTIMER_GetDefaultConfig(&sctimerInfo);
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/* Initialize SCTimer module */
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SCTIMER_Init(SCT0, &sctimerInfo);
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/* Configure first PWM with frequency 24kHZ from first output */
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pwmParam.output = DEMO_FIRST_SCTIMER_OUT;
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pwmParam.level = kSCTIMER_HighTrue;
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pwmParam.dutyCyclePercent = 50;
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if (SCTIMER_SetupPwm(SCT0, &pwmParam, kSCTIMER_CenterAlignedPwm, 24000U, sctimerClock, &event) == kStatus_Fail)
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{
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return -1;
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}
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/* Configure second PWM with different duty cycle but same frequency as before */
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pwmParam.output = DEMO_SECOND_SCTIMER_OUT;
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pwmParam.level = kSCTIMER_LowTrue;
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pwmParam.dutyCyclePercent = 20;
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if (SCTIMER_SetupPwm(SCT0, &pwmParam, kSCTIMER_CenterAlignedPwm, 24000U, sctimerClock, &event) == kStatus_Fail)
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{
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return -1;
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}
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/* Start the timer */
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SCTIMER_StartTimer(SCT0, kSCTIMER_Counter_L);
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while (1)
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{
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}
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}
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