Posted on May 02, 2017 at 21:49
I have made a board on which I plug the Nucleo-F767ZI microcontroller board. There is one GPIO pin that I cannot get to function as a digital output: PG2.
This is my code in mbed-os:
static
DigitalOut
myPin_A
(
PG_2
);
static
DigitalOut
myPin_B
(
PG_3
);
...
static
void
someFunction
()
{
myPin_A
.
write
(1);
// <- This one doesn't work :(
myPin_B
.
write
(1);
// <- But this one works!
}
I thought: 'Perhaps this problem has to do with mbed-os'. So I have tried the ST HAL:
static
void
someFunction
()
{
GPIO_InitTypeDef
GPIO_InitStruct
;
GPIO_InitStruct
.Pin =
GPIO_PIN_2
;
GPIO_InitStruct
.Mode =
GPIO_MODE_OUTPUT_PP
;
GPIO_InitStruct
.Pull =
GPIO_NOPULL
;
GPIO_InitStruct
.Speed =
GPIO_SPEED_FREQ_LOW
;
HAL_GPIO_Init
(
GPIOG
, &
GPIO_InitStruct
);
GPIO_InitStruct
.Pin =
GPIO_PIN_3
;
GPIO_InitStruct
.Mode =
GPIO_MODE_OUTPUT_PP
;
GPIO_InitStruct
.Pull =
GPIO_NOPULL
;
GPIO_InitStruct
.Speed =
GPIO_SPEED_FREQ_LOW
;
HAL_GPIO_Init
(
GPIOG
, &
GPIO_InitStruct
);
HAL_GPIO_WritePin
(
GPIOG
,
GPIO_PIN_2
,
GPIO_PIN_SET
);
// <- This one doesn't work :(
HAL_GPIO_WritePin
(
GPIOG
,
GPIO_PIN_3
,
GPIO_PIN_SET
);
// <- But this one works!
}
As you can see, I get exactly the same result. I've tried another Nucleo-F767ZI board standalone - I don't plug it into my custom board to reassure myself that the PG2 pin isn't affected by anything outside the Nucleo - but still got the same result.
I have posted my question also on StackOverflow:
https://electronics.stackexchange.com/questions/303038/pg2-gpio-output-on-nucleo-f767zi-doesnt-function
EDIT
I have generated a new project from scratch with CubeMX. As you know, CubeMX does not support mbed-os, but freeRTOS instead. When using freeRTOS, the pin
PG_2
works, using the code given above.
Why don't I get it working when mbed-os is running? This is so strange :(
#stm32f767zi-nucleo #stm32f767zi-nucleo-board #mbed #stm32f767
