GPIO Configuration Issue Zephyr RTOS+PlatformIO+STM32

Asked Apr 29 '22 at 14:27

Active Apr 29 '22 at 14:27

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This is probably a dumb question but I need some help : I'm trying to simply blink an LED on my STM32L073 board. The LED is connected to the PB6 pin here's my code :

#include <zephyr.h>
#include <device.h>
#include <devicetree.h>
#include <drivers/gpio.h>

void main(void)
{
    const struct device *dev;
    dev = device_get_binding("GPIOB");
    gpio_pin_configure(dev,6,GPIO_OUTPUT);
    while(1){
        gpio_pin_set(dev,6,1);
        k_msleep(1000);
        gpio_pin_set(dev,6,0);
        k_msleep(1000);
    }
}

I'm using platformio with Zephyr RTOS framework In prj.conf I do have : CONFIG_GPIO=y In zephyr.dts, for gpiob the label is well GPIOB so I don't understand what is wrong here, so if anyone can help me it would be great :)

asked Apr 29 '22 at 14:27

LaVoute974

Does it compile without any errors? Does the GPIOB label exist in your zephyr.dts (see build folder) file? – El tornillo May 01 '22 at 11:31
maybe you could try the blinky example from zephyr basic samples? And modify to "blink" your custom led? – floppy12 May 01 '22 at 21:54
Yes it compile without errors and GPIOB does exist in zephyr.dts I also tried to modify the blinky example but it doesn't work either – LaVoute974 May 02 '22 at 07:11
Sorry to ask this, but did you flash after compile? – El tornillo May 02 '22 at 09:40
Ahah, good question, yep I compile and then flash ! – LaVoute974 May 02 '22 at 11:54
Did you see that the default peripheral mapping for the UART is PB6/PB7? Maybe there is a conflict. – El tornillo May 02 '22 at 12:11
Yes, but with a simple Arduino Code I'm able to blink the led so I don't think it's an issue that PB6 is also for the Uart – LaVoute974 May 02 '22 at 12:48
You say you use platformio. I don't know it. What other default symbols than CONFIG_GPIO are enabled? – El tornillo May 02 '22 at 13:13
Only CONFIG_GPIO=y, nothing else – LaVoute974 May 02 '22 at 13:33
The LD2 (green) on your board is situated at PA5. The LED on PB6 you are speaking about, is it on some kind of arduino extension board? – El tornillo May 02 '22 at 13:35
Besides. This would be a part of the other symbols, which I guess should be enabled: CONFIG_SOC_SERIES_STM32L0X=y CONFIG_SOC_STM32L073XX=y CONFIG_PINCTRL=y – El tornillo May 02 '22 at 13:38
Nope, I just add a led to PB6, it's a custom board with an stm32l073 on it – LaVoute974 May 02 '22 at 13:38
I tried to add what you give, it still doesn't work and CONFIG_PINCTRL=y return an error – LaVoute974 May 02 '22 at 13:42
How did you connect the LED to the output? – El tornillo May 02 '22 at 13:43
with a transistor, but it's working because with a digitalWrite(PB6,HIGH) in ArduinoIDE it's working perfectly – LaVoute974 May 02 '22 at 13:44
When you use Zephyr, is the default setting for the output push-pull? – El tornillo May 02 '22 at 13:46
where can I see that ? – LaVoute974 May 02 '22 at 13:48
Changing "GPIO_OUTPUT" to "GPIO_MODE_OUTPUT_PP" doesn't change anything – LaVoute974 May 02 '22 at 13:52

GPIO Configuration Issue Zephyr RTOS+PlatformIO+STM32

0 Answers0