Error when Loading program

[JimP]

I am very new to ARM controllers.  All of my experience is with Atmel family, which I've been using for years.

I just got the nRF52 Development board and have loaded several of the example programs.  All works fine.

I wanted to set one pin (pin 5) as output just to see how it works.  I used the blinky example modified as

follows:

int main(void)
{
    /* Configure board. */
    bsp_board_init(BSP_INIT_LEDS);
 
  nrf_gpio_cfg_output(0x5);

    /* Toggle LEDs. */
    while (true)
    {
        for (int i = 0; i < LEDS_NUMBER; i++)
        {
            bsp_board_led_invert(i);
      nrf_gpio_pin_set(0x5);
            nrf_delay_ms(500);
      nrf_gpio_pin_clear(0x5);
        }
    }

}

The program builds but when I try to load I get an error that has something to do with trying to read @ 0x20000004

FLAGS AHB_AP.  It also says Internal DDL error.  I erased the prior program using nRFgo and tried to load with the same result.

What am I doing wrong?

Thank you for your help.

[JimP]

The error is "Firmware of the connected J-Link does not support the following memory access read@ 0x20000004

Flags: via AHB_AP."

[JimP]

I found a link to the solution on your site.  I did a google search and it took me to an exchange where someone had the same problem.  The engineer put in a link to the latest Segger J-Link software, which I loaded.  This solved the problem.

Thanks

[Joakim Jakobsen]

I'm glad you were able to solve your issues.

Thanks for sharing the solution.

Cheers.