nrf52840 dongle PCA10059 GPIO Out LED

RE: nrf52840 dongle PCA10059 GPIO Out LED

shaneelliott — Sat, 18 Jan 2025 20:21:09 GMT

Not a pretty solution but this works.

void pinOn(uint32_t pin) {
    // Set pin direction as input using DIRCLR register
    NRF_GPIO->DIRCLR = (1 << pin);

    NRF_GPIO->PIN_CNF[pin] = (NRF_GPIO_PIN_DIR_INPUT << GPIO_PIN_CNF_DIR_Pos)
                               | (NRF_GPIO_PIN_INPUT_CONNECT << GPIO_PIN_CNF_INPUT_Pos)
                               | (NRF_GPIO_PIN_PULLUP << GPIO_PIN_CNF_PULL_Pos)
                               | (NRF_GPIO_PIN_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
                               | (NRF_GPIO_PIN_NOSENSE << GPIO_PIN_CNF_SENSE_Pos);
}

void clearPin(uint32_t pin) {
    // Reset PIN_CNF register to default value
    NRF_GPIO->PIN_CNF[pin] = 0;  // All bits set to 0 (default state)
    
    // Clear direction (set as input - default state)
    NRF_GPIO->DIRCLR = (1 << pin);
    
    // Clear output value
    NRF_GPIO->OUTCLR = (1 << pin);
}

RE: nrf52840 dongle PCA10059 GPIO Out LED

shaneelliott — Fri, 17 Jan 2025 14:03:31 GMT

I will try running the following

led_setup();
led_on();
nrf_delay_ms(1000); // Sleep/block for 1 second
led_off();
nrf_delay_ms(1000); // Sleep/block for 1 second
led_on();

but also just tried changing the pin map of the board LED in pca10059.h so basically its gets setup exactly the same as the onboard LED's but this did not help

RE: nrf52840 dongle PCA10059 GPIO Out LED

shaneelliott — Fri, 17 Jan 2025 14:00:35 GMT

I unfortunately don't have a debugger attached to nrf52840 dongle which problem solving pretty tricky

RE: nrf52840 dongle PCA10059 GPIO Out LED

Einar Thorsrud — Fri, 17 Jan 2025 13:58:24 GMT

I don't see any obvious issues here. Can you call your led_on() and led_off() function after led_setup() in your main function and verify with a debugger that they actually run? If so, it should work. You can also step down into them when debugging to verify that it does and that the OUT register is set as it should (note that you should do this before initializing the SoftDevice, as that complicates debugging a bit).

RE: nrf52840 dongle PCA10059 GPIO Out LED

shaneelliott — Fri, 17 Jan 2025 13:52:40 GMT

yes i have double checked the voltage output on the pin and get nothing. The led still looks good. Her is the full source code. LED is connected (0.9) in this https://drive.google.com/file/d/18iL3t57LD_V3lU2_xP-JLgGanAloNKDK/view?usp=sharing

RE: nrf52840 dongle PCA10059 GPIO Out LED

Einar Thorsrud — Fri, 17 Jan 2025 13:18:41 GMT

Hi,

I see. This looks correct. Could it be that you are missing an include or similar - do you get warnings when building? Or can you share the full code?

Also, if you have connected the LED to VDD for some time without a series resistor (if I read you correctly) you may have damaged it, so it is worth checking if it still works. Perhaps just measure the voltage on P0.02 to verify if you get it set and cleared correctly?

RE: nrf52840 dongle PCA10059 GPIO Out LED

shaneelliott — Fri, 17 Jan 2025 13:10:43 GMT

yes that was the exact code i tried.

#define LED_PIN NRF_GPIO_PIN_MAP(0,2)

void led_setup(void)
{
ret_code_t err_code;

// Configure the output pin
nrf_gpio_cfg_output(LED_PIN);
}

void led_on(void) {
nrf_gpio_pin_clear(LED_PIN);
}

void led_off(void) {
nrf_gpio_pin_set(LED_PIN);
}

I am using SDK17.1.0. I have tried on other PINs as well. Also I am using a soft device in my main code but have tried with and without a soft device present

RE: nrf52840 dongle PCA10059 GPIO Out LED

Einar Thorsrud — Fri, 17 Jan 2025 12:57:27 GMT

Hi,

Which method did you try, and which pin have you conneced the LED to? Also, which SDK are you using?

The simplest way to control a GPIO (which control the LED) is to just set it directly using nrf_gpio_pin_set() and nrf_gpio_pin_clear() with the pin number as parameter. For that you need "#include <hal/nrf_gpio.h>", and you need to first configure the pin as output using nrf_gpio_cfg_output(), with the pin number as parameter here as well.