LAUNCHXL-CC1310: CC1310 定时器参考代码

/*
 * Copyright (c) 2015-2019, Texas Instruments Incorporated
 * All rights reserved.
 *
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 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
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 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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 */

/*
 *  ======== pwmled2.c ========
 */
/* For usleep() */
#include <unistd.h>
#include <stddef.h>

/* Driver Header files */
#include <ti/drivers/PWM.h>

/* Example/Board Header files */
#include "Board.h"

/*
 *  ======== mainThread ========
 *  Task periodically increments the PWM duty for the on board LED.
 */
void *mainThread(void *arg0)
{
    /* Period and duty in microseconds */
    uint16_t   pwmPeriod = 3000;
    uint16_t   duty = 0;
    uint16_t   dutyInc = 100;

    /* Sleep time in microseconds */
    uint32_t   time = 50000;
    PWM_Handle pwm1 = NULL;
    PWM_Handle pwm2 = NULL;
    PWM_Params params;

    /* Call driver init functions. */
    PWM_init();

    PWM_Params_init(&params);
    params.dutyUnits = PWM_DUTY_US;
    params.dutyValue = 0;
    params.periodUnits = PWM_PERIOD_US;
    params.periodValue = pwmPeriod;
    pwm1 = PWM_open(Board_PWM0, &params);
    if (pwm1 == NULL) {
        /* Board_PWM0 did not open */
        while (1);
    }

    PWM_start(pwm1);

    pwm2 = PWM_open(Board_PWM1, &params);
    if (pwm2 == NULL) {
        /* Board_PWM0 did not open */
        while (1);
    }

    PWM_start(pwm2);

    /* Loop forever incrementing the PWM duty */
    while (1) {
        PWM_setDuty(pwm1, duty);

        PWM_setDuty(pwm2, duty);

        duty = (duty + dutyInc);

        if (duty == pwmPeriod || (!duty)) {
            dutyInc = - dutyInc;
        }

        usleep(time);
    }
}

#include <unistd.h>
#include <stdint.h>
#include <stddef.h>

/* Driver Header files */
#include <ti/drivers/GPIO.h>
#include <ti/drivers/Power.h>
#include <ti/drivers/power/PowerCC26XX.h>
#include <ti/drivers/timer/GPTimerCC26XX.h>

#include <ti/sysbios/BIOS.h>
#include <ti/sysbios/knl/Task.h>

#include <xdc/runtime/Types.h>

/* Board Header file */
#include "Board.h"

GPTimerCC26XX_Handle hTimer0A;

void timerCallback0A(GPTimerCC26XX_Handle handle, GPTimerCC26XX_IntMask interruptMask)
{
    GPIO_toggle(Board_GPIO_LED0);
}

/*
 *  ======== mainThread ========
 */
void *mainThread(void *arg0)
{
    GPIO_init();

    GPIO_setConfig(Board_GPIO_LED0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);

    GPTimerCC26XX_Params params0A;
    GPTimerCC26XX_Params_init(&params0A);
    params0A.width          = GPT_CONFIG_16BIT;
    params0A.mode           = GPT_MODE_PERIODIC;
    params0A.direction      = GPTimerCC26XX_DIRECTION_UP;
    params0A.debugStallMode = GPTimerCC26XX_DEBUG_STALL_OFF;
    hTimer0A = GPTimerCC26XX_open(CC1310_LAUNCHXL_GPTIMER0A, &params0A);

    if(hTimer0A == NULL)
    {
        while(1);
    }

    Power_setDependency(PowerCC26XX_XOSC_HF);

    Types_FreqHz  freq;
    BIOS_getCpuFreq(&freq);
    GPTimerCC26XX_Value loadVal = (freq.lo / 1000)*348 - 1;
    GPTimerCC26XX_setLoadValue(hTimer0A, loadVal);
    GPTimerCC26XX_registerInterrupt(hTimer0A, timerCallback0A, GPT_INT_TIMEOUT);

    GPTimerCC26XX_start(hTimer0A);

    while(1)
    {
        Task_sleep(BIOS_WAIT_FOREVER);
    }
}