[参考译文] CC1352R：GPIO 读取不返回输出引脚的值

您好、Thies、

我刚刚尝试过、它确实使用 GPIO_read 返回正确的状态。 下面是一个基于 timerled 项目的示例、其中 GpioState 是引脚的状态：

/*
 * Copyright (c) 2016-2020, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * *  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;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 *  ======== timerled.c ========
 */

#include <stddef.h>

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

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

volatile uint_fast8_t GpioState = 0;

/* Callback used for toggling the LED. */
void timerCallback(Timer_Handle myHandle, int_fast16_t status);

/*
 *  ======== mainThread ========
 */
void *mainThread(void *arg0)
{
    Timer_Handle timer0;
    Timer_Params params;

    /* Call driver init functions */
    GPIO_init();
    Timer_init();

    /* Configure the LED pin */
    GPIO_setConfig(CONFIG_GPIO_LED_0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);

    /* Turn off user LED */
    GPIO_write(CONFIG_GPIO_LED_0, CONFIG_GPIO_LED_OFF);

    /*
     * Setting up the timer in continuous callback mode that calls the callback
     * function every 1,000,000 microseconds, or 1 second.
     */
    Timer_Params_init(&params);
    params.period        = 1000000;
    params.periodUnits   = Timer_PERIOD_US;
    params.timerMode     = Timer_CONTINUOUS_CALLBACK;
    params.timerCallback = timerCallback;

    timer0 = Timer_open(CONFIG_TIMER_0, &params);

    if (timer0 == NULL)
    {
        /* Failed to initialized timer */
        while (1) {}
    }

    if (Timer_start(timer0) == Timer_STATUS_ERROR)
    {
        /* Failed to start timer */
        while (1) {}
    }

    return (NULL);
}

/*
 * This callback is called every 1,000,000 microseconds, or 1 second. Because
 * the LED is toggled each time this function is called, the LED will blink at
 * a rate of once every 2 seconds.
 */
void timerCallback(Timer_Handle myHandle, int_fast16_t status)
{
    GPIO_toggle(CONFIG_GPIO_LED_0);
    GpioState = GPIO_read(CONFIG_GPIO_LED_0);
}

此致、

Arthur

Arthur、您好！

感谢您的快速回复。

这仍然不起作用、GipioState 不会改变、我已经添加了一个计数器来显示 LED 的切换次数

/*
 * Copyright (c) 2016-2020, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * *  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;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 *  ======== timerled.c ========
 */

#include <stddef.h>

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

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

volatile uint_fast8_t GpioState = 0;
volatile uint8_t counter = 0;

/* Callback used for toggling the LED. */
void timerCallback(Timer_Handle myHandle, int_fast16_t status);

/*
 *  ======== mainThread ========
 */
void *mainThread(void *arg0)
{
    Timer_Handle timer0;
    Timer_Params params;

    /* Call driver init functions */
    GPIO_init();
    Timer_init();

    /* Configure the LED pin */
    GPIO_setConfig(CONFIG_GPIO_LED_0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);

    /* Turn off user LED */
    GPIO_write(CONFIG_GPIO_LED_0, CONFIG_GPIO_LED_OFF);

    /*
     * Setting up the timer in continuous callback mode that calls the callback
     * function every 1,000,000 microseconds, or 1 second.
     */
    Timer_Params_init(&params);
    params.period        = 1000000;
    params.periodUnits   = Timer_PERIOD_US;
    params.timerMode     = Timer_CONTINUOUS_CALLBACK;
    params.timerCallback = timerCallback;

    timer0 = Timer_open(CONFIG_TIMER_0, &params);

    if (timer0 == NULL)
    {
        /* Failed to initialized timer */
        while (1) {}
    }

    if (Timer_start(timer0) == Timer_STATUS_ERROR)
    {
        /* Failed to start timer */
        while (1) {}
    }

    return (NULL);
}

/*
 * This callback is called every 1,000,000 microseconds, or 1 second. Because
 * the LED is toggled each time this function is called, the LED will blink at
 * a rate of once every 2 seconds.
 */
void timerCallback(Timer_Handle myHandle, int_fast16_t status)
{
    GPIO_toggle(CONFIG_GPIO_LED_0);
    GpioState = GPIO_read(CONFIG_GPIO_LED_0);
    counter++;
}

但当我进入 GPIO_Read 函数时、可以看到它正在从 GPIO DIN 寄存器读取、但该寄存器在写入或切换后不会更新

顺便说一下、我正在使用 SDK6.3

您可以尝试绘制 GpioState 变量吗？

我看到状态发生变化、您能否确认您也这么做(或不做)？

我将使用6.40、但据我所知、GPIO 没有发生任何变化。

此致、

Arthur

所以我绘制了它、但它仍然保持为零

明白了、您能否将经过时间延迟的完整 CCS 项目发送给我？

顺便说一下、您是使用自定义板还是 Launchpad？

我正在使用一个带有 DIO 15上 LED 的定制电路板

我仍然看到 GpioState 变量被切换。

但是、当按下 BTN1 (CC1352R Launchpad 上的 DIO15)时、它会停止切换并保持低电平状态。

DIO15如何连接到电路板上？ 我还建议在 SysConfig 中创建一个定制板、使其不会干扰现有的按钮定义。

此致、

Arthur