i.MX8QM SC_GPIO_02 (LED) toggle

rkohli2000 — Fri, 11 Sep 2020 22:21:15 GMT

Hi,

I tried to toggle an LED from imx8QM MEK SCU FW (board.c function board_init()) using SCU_LED on SC_GPIO_02.

Can someone suggest what's the issue here ?

In board_init(), I call a test function (DEBUG_Toggle_GPIO) from the BOOT_PHASE_FINAL_INIT case. The DEBUG function gets called but no LED toggles :

void DEBUG_Toggle_GPIO(uint32_t secs)
{
pad_force_mux(SC_P_SCU_GPIO0_02, 0,SC_PAD_CONFIG_NORMAL, SC_PAD_ISO_OFF);

rgpio_pin_config_t config;
config.pinDirection = kRGPIO_DigitalOutput;

/* SCU_LED on SC_GPIO_02 */
config.outputLogic = 1U;
for (uint32_t i = 0; i<secs; i++)
{
FGPIO_PinInit(FGPIOA, 2U, &config);
SYSTICK_CycleDelay(SC_SYSTICK_NSEC_TO_TICKS(30U) + 1U);
if (i%2 == 0)
{
FGPIO_PinWrite(FGPIOA, 1U, 1U);

}
else
{
FGPIO_PinWrite(FGPIOA, 1U, 0U);
}
SystemTimeDelay(1000000U);
}
}

Thanks

Re: i.MX8QM SC_GPIO_02 (LED) toggle

rkohli2000 — Sun, 13 Sep 2020 05:59:58 GMT

So, I found my typo in FGPIO_PinInit()....I needed to correct the Pin (1U):

FGPIO_PinInit(FGPIOA, 2U 1U, &config);

Now, I can see the LED toggle properly in my test, that's great.

Please ignore this question.

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i.MX8QM SC_GPIO_02 (LED) toggle

Re: i.MX8QM SC_GPIO_02 (LED) toggle