i.MX RT Crossover MCUsのトピックRe: GPIO_PinInit

GPIO_PinInit

davidzhu — Fri, 22 Oct 2021 04:33:58 GMT

In SDK_2.10_RT1060, lwip_tcpecho_bm.c, I can see below 4 GPIO_PinInits at line 137

GPIO_PinInit(GPIO1, 9, &gpio_config);
GPIO_PinInit(GPIO1, 10, &gpio_config);
/* pull up the ENET_INT before RESET. */
GPIO_WritePinOutput(GPIO1, 10, 1);
GPIO_WritePinOutput(GPIO1, 9, 0);
delay();
GPIO_WritePinOutput(GPIO1, 9, 1);

Could somebody let me know the meaning?

Thank you very much.

Re: GPIO_PinInit

kerryzhou — Fri, 22 Oct 2021 08:24:14 GMT

Hi @davidzhu ,

Please check the MIMXRT1060-EVK schematic:

So, the code function is also in the comment:

/* pull up the ENET_INT before RESET. */
GPIO_WritePinOutput(GPIO1, 10, 1);
GPIO_WritePinOutput(GPIO1, 9, 0);
delay();
GPIO_WritePinOutput(GPIO1, 9, 1);

It is used to configure the external PHY.

Wish it helps you!

Best Regards,

Kerry