iMXRT1010 enabling GPIO2 causes hard fault

[youngSheldon]

Hi community,

I have an application based on EVK of iMXRT1010 and I need many IOs. As a consequence I decided to use PIN62, which is unused on the board, being connected only to TP33. It belongs to GPIO2 and I use the CConfigTools->Pins for it. I succesfully configured several pins from GPIO1, but as soon as I enable the PIN62, I run into a hard faulu as seen in pics below. Any ideas are much appreciated.

It crashes at the last line (generated code in pin.mux) but works fine if GPIO2 related code is removed:

IOMUXC_SetPinMux(IOMUXC_GPIO_SD_12_GPIO2_IO12, 0U);

IOMUXC_GPR->GPR26 = ((IOMUXC_GPR->GPR26 &

(~(BOARD_INITPINS_IOMUXC_GPR_GPR26_GPIO_SEL_MASK)))

| IOMUXC_GPR_GPR26_GPIO_SEL(0x00U)

);

IOMUXC_SetPinConfig(IOMUXC_GPIO_11_GPIOMUX_IO11, 0x10A0U);

[Pablo_Ramos · Accepted solution]

Hi @youngSheldon,

FlexSPI_DQS needs to be floating for QSPI Flash RW @133MHz (default), in this case PIN62 is DQS Reserved.

If you link the application to RAM, you should be able to configure PIN62.

Best Regards,
Pablo

[youngSheldon]

Thanks for the reply Pablo.

I was expecting the PIN Mux Settings to take ofer and DQS to be ignored and left floating inside the chip. I was so wrong...