How to change LED's status as active low in ti_drivers_config?

Hi,

Have you tried setting the "Initial Output State" to Low in SysConfig?

Regards,

Arthur

Hello Arthur,

I tried it and LEDs are starting to work at on state. But I want them to start off state and change their state with GPIO_write function.

By the way when I want to change the state with command GPIO_write(CONFIG_GPIO_LED_RED, CONFIG_GPIO_LED_ON); the LED off.

Also I tried invert option in sysconfig but can not fit into my usage.

Regards,

Veli Can

Hi Veli,

Can you show me how the LEDs are wired on your board?

Regards,

Arthur

Hi Arthur,

It is like that. RGB_R is DIO38, RGB_B is DIO39 and RGB_G is DIO40.

Regards,

Veli Can

Hi,

I see, pins 38, 39 and 40 actually mean DIO_25, DIO_26 and DIO_27, as per table 7.1 of the CC1312R datasheet.
By the way, I think the current sink from the LEDs is too high.

The technical reference manual for that device states (table 13-2) that those pins can drive a maximum of 4mA.

If you want to try the pin initialization to high, here is a modification of the empty project.

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/*
 *  ======== empty.c ========
 */

/* For usleep() */
#include <unistd.h>
#include <stdint.h>
#include <stddef.h>

/* Driver Header files */
#include <ti/drivers/GPIO.h>
// #include <ti/drivers/I2C.h>
// #include <ti/drivers/SPI.h>
// #include <ti/drivers/Watchdog.h>

/* Driver configuration */
#include "ti_drivers_config.h"

/*
 *  ======== mainThread ========
 */
void *mainThread(void *arg0)
{
    /* 1 second delay */
    uint32_t time = 1;

    /* Call driver init functions */
    GPIO_init();
    // I2C_init();
    // SPI_init();
    // Watchdog_init();

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

    /* Turn on user LED */
    //GPIO_write(CONFIG_GPIO_LED_0, CONFIG_GPIO_LED_ON);

    while (1)
    {
        sleep(time);
        //GPIO_toggle(CONFIG_GPIO_LED_0);
    }
}

with the following SysConfig:

You will find that the pin starts on the HIGH state.

Regards,

Arthur