NUCLEO-L4R5ZI board CN12 header Pin76 = PG7, pin66 = PG8, config as GPIO output pins, but cannot toggle these two pins, SB130 and SB131 have been removed from the board.

[HYuan.1]

NUCLEO-L4R5ZI board, CN12 header: Pin76 = PG7, pin66 = PG8.

SB130 and SB131 have been removed from the board. 

config PG7, PG8 as GPIO output pins, but cannot toggle these two pins

Here is the code:

 GPIO_InitTypeDef GPIO_InitStructure = {0};

 __HAL_RCC_GPIOG_CLK_ENABLE();

 GPIO_InitStructure.Pin =  GPIO_PIN_1 | GPIO_PIN_7 | GPIO_PIN_8;

 GPIO_InitStructure.Mode =  GPIO_MODE_OUTPUT_PP;               

 GPIO_InitStructure.Pull = GPIO_NOPULL; 

 GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;  

 HAL_GPIO_Init(GPIOG, &GPIO_InitStructure);

 HAL_GPIO_WritePin(GPIOG, GPIO_PIN_1, GPIO_PIN_RESET);  // set to LOW,  OK

 HAL_GPIO_WritePin(GPIOG, GPIO_PIN_1, GPIO_PIN_SET);  // set to HIGH, OK. PG1 toggles OK.

 HAL_GPIO_WritePin(GPIOG, GPIO_PIN_7, GPIO_PIN_RESET);  // LOW.  PG7 always low

 HAL_GPIO_WritePin(GPIOG, GPIO_PIN_7, GPIO_PIN_SET);   // set to HIGH, PG7 always low (measured), cannot set to high!

 HAL_GPIO_WritePin(GPIOG, GPIO_PIN_8, GPIO_PIN_RESET);  // LOW.  PG8 always low

 HAL_GPIO_WritePin(GPIOG, GPIO_PIN_8, GPIO_PIN_SET);  // set to HIGH, PG8 always low (measured), cannot set to high!

Note: (1) PG0, and PG1 pins can set/toggle correctly.

   (2) PG7 and PG8 cannot set/toggle correctly.

Thanks.

[JTP1]

Hello.

Are jumpers SB193 and SB 195 closed ?

[HYuan.1]

Yes. SB193 and 195 are closed.

[JTP1]

OK.some ideas:

Have you connect something to CN12 pins 67 / 66, if yes, disconnect and test again.

Maybe check the connection from these CN12 pins to MCU pins or to SB130/131 to make sure youre measuring right pins/board is ok/you have located jumpers correctly.

Check also that pins are not grounded.

In code, there is no other initializations, for example LPUART1 which overrides the pin ?

[waclawek.jan · Accepted solution]

PG2 to PG15 pins are supplied not from VDD but from VDDIO2, and you have to switch the VDDIO2 domain on by setting PWR_CR2.IOSV

 

JW

[HYuan.1]

Thanks for help. This issue is solved by calling  "HAL_PWREx_EnableVddIO2();"

as JW pointed out "PG2 to PG15 pins are supplied not from VDD but from VDDIO2, and you have to switch the VDDIO2 domain on by setting PWR_CR2.IOSV"

Thank you.