MIMXRT1020-EVK Arduino connector UART setting

[CarlLee]

I have the MIMXRT1020-EVK board for testing.

There is UART function pins in the Arduino connector. How to set the UART pins function?

I try to modify the sample code from evkmimxrt1020_lpuart_interrupt.

#define DEMO_LPUART LPUART1
#define DEMO_LPUART_IRQn LPUART1_IRQn
#define DEMO_LPUART_IRQHandler LPUART1_IRQHandler

I change the "LPUART1" to "LPUART2" but the uart in the Arduino connector is not function.

Please advise,

Thanks

Carl

[CarlLee]

Dear Jeremy Zhou,

Thanks for your answer.

It is solved by further setting the pins as follows.

//set lpUART2 io pins
IOMUXC_SetPinMux(IOMUXC_GPIO_AD_B1_08_LPUART2_TX, 0U);
IOMUXC_SetPinMux(IOMUXC_GPIO_AD_B1_09_LPUART2_RX, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_B1_08_LPUART2_TX, 0x10B0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_B1_09_LPUART2_RX, 0x10B0U);

[jeremyzhou · Accepted solution]

Hi @CarlLee ,
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
Besides the above configuration, it also needs to initialize the UART pins.
Have a great day,
TIC

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