GPIO troubles

[Saram]

sad

[Jørgen Holmefjord]

How have you connected the LED? Did you connect the LED to GPIO P1.02 (pin # 39 on the module)? Note that the pin numbers used in the application is referring to the GPIO number (PORT_NUMBER*32 + PIN_NUMBER).

[Jørgen Holmefjord]

Which SDK version are you using? Have you tried both setting and clearing the GPIO? Have you tried setting the GPIO manually without the GPIO HAL functions?

NRF_P1->PIN_CNF[2] = (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos) |
                     (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
                     (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos) |
                     (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
                     (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos);
                              
NRF_P1->OUTSET = (1UL << 2);  // Set GPIO P1.02 high

NRF_P1->OUTCLR = (1UL << 2);  // Set GPIO P1.02 low

[Saram]

I just tried, incl. on zero port on several pins.
Unfortunately, the result is zero. Maybe you need some PPI settings or disable standard UART or something else.
During the tests - additionally did not include anything. If you enable SPI 0 and output MOSI or SCK on the same P 1.02 - everything works, I see the signal visually (on the LED) and on the oscilloscope - the signal is clear.

[Jørgen Holmefjord]

I tested both codes on a nRF52840 DK. Both work as expected. Please make sure the pins are not configured for anything else when using as GPIO (SPI, etc.). Do you see any pin change on your scope? 

[Saram]

#define BASE 0x50000000

ptr = (int*) (BASE + 0x714);
*ptr= 0x00000001;
while (1)
{
ptr = (int*)(BASE + 0x508);
*ptr=0x20;
nrf_delay_ms(1000);
ptr = (int*)(BASE + 0x50C);
*ptr=0x20;
}

This code works as expected (for port 0 pin 5). But if I try to register BASE as 0x50000300 and change the pin of the first port accordingly (Listing 2), nothing happens.

#define BASE 0x50000300
ptr = (int*) (BASE + 0x708);
*ptr= 0x00000001;
while (1)
{
	ptr = (int*)(BASE + 0x508);
	*ptr=0x4;
	nrf_delay_ms(1000);
	ptr = (int*)(BASE + 0x50C);
	*ptr=0x4;
}

[Saram]

Mystic. I rerun Listing 2 from a colleague - everything works

[Jørgen Holmefjord]

Could there be something wrong with your module, or did you test it on the same module?