How to make a simple LED blink program

[akshaey]

Hello Everyone

I am really new to everything here, i just got nRF 52832 board,

Can anyone please tell me the step-by- step method on how to make a program in keil uVision.

Any help will be greatly appreciated.

thanks in advance

[Sigurd]

Hi,

There is a blinky example in the SDK. Its located in the folder:

<SDK_InstallFolder>\examples\peripheral\blinky

You can download the SDK 12.2 here.

[Sigurd]

Use the Keil project in the folder

<SDK_InstallFolder>\examples\peripheral\blinky\pca10040\blank\arm5_no_packs

[akshaey]

thanks for your reply,

i used the blinky program and i saw that it uses built in library functions but what if i want to create a program from scratch or the beginning without using any built in function, by coding in C to just set and reset a pin on nrf52832 after a delay?

thanks

[Sigurd]

In that case I would recommend starting with the template project:

SDK_Folder\examples\peripheral\template_project\pca10040\blank\arm5_no_packs

You can find example on how to use the GPIO peripheral directly here. Pin 17 is the LED1 on the Development kit(DK).

[akshaey]

i have been able to blink led with the following code, but how to use this code to generate a PWM on any other GPIO pins than the 4 LED pins given. which command to be used for setting a pin low or high?

include <stdbool.h>

include <stdint.h>

include "nrf_delay.h"

include "bsp.h" /for gpio and led declrtn/

include "nrf.h"

include "system_nrf52.h"

define ENABLE_SWD 1

static const uint8_t leds_list[LEDS_NUMBER] = { 9, 7, LED_1, LED_4 };

int main(void) { /* Configure LED-pins as outputs. */ LEDS_CONFIGURE(LEDS_MASK); int i=0;

while(true) { while(i<500)

{

                         // Start LED here

nrf_gpio_pin_clear(LED_3);

nrf_delay_ms(1000);

nrf_gpio_pin_set(LED_3);

nrf_delay_ms(1000);

                        i++;

                    }

} }