how to configure two gpio pin in High drivemode 5mA

RE: how to configure two gpio pin in High drivemode 5mA

Ole Bauck — Thu, 22 Dec 2016 09:25:07 GMT

You can make your own function for configuring a gpio as output in high drive:

__STATIC_INLINE void nrf_gpio_cfg_output_high_drive(uint32_t pin_number)
{
    nrf_gpio_cfg(
        pin_number,
        NRF_GPIO_PIN_DIR_OUTPUT,
        NRF_GPIO_PIN_INPUT_DISCONNECT,
        NRF_GPIO_PIN_NOPULL,
        NRF_GPIO_PIN_H0H1,
        NRF_GPIO_PIN_NOSENSE);
}

RE: how to configure two gpio pin in High drivemode 5mA

Mikkael — Wed, 21 Dec 2016 21:54:14 GMT

Hi, I'm going to use VisualStudio with VisualGDB for programming my nRf51 project. I have two 2mA low-current LEDs I'd like to set high in high-drive mode.

There's a simple sample code for blinking an LED:

#include <stdbool.h>
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif
	
#include "nrf_delay.h"
#include "nrf_gpio.h"
	
#ifdef __cplusplus
}
#endif


int main(void)
{
	nrf_gpio_cfg_output(13);

	for (;;)
	{
		nrf_gpio_pin_set(13);
		nrf_delay_ms(500);
		nrf_gpio_pin_clear(13);
		nrf_delay_ms(500);
	}
}

Now I would like to use this sample use pins 12 & 13 in high-drive mode. Is there any example available for this? On those pins I've connected low-current LEDs.

RE: how to configure two gpio pin in High drivemode 5mA

Ole Bauck — Mon, 07 Dec 2015 17:01:04 GMT

Yes, you need to measure in series with the buzzer.

RE: how to configure two gpio pin in High drivemode 5mA

MARTIN FR — Mon, 07 Dec 2015 16:04:10 GMT

i tested the voltage in the development kit but if i need to measure the current then i ned to break the circuit inorder to measure current right? if theres is nay other possibility to measure the current of that pin please let me know

RE: how to configure two gpio pin in High drivemode 5mA

Ole Bauck — Mon, 07 Dec 2015 16:00:49 GMT

Can you measure how high the current draw is?

RE: how to configure two gpio pin in High drivemode 5mA

MARTIN FR — Mon, 07 Dec 2015 15:15:33 GMT

thank you for your kind response i ahve configured like this in my code but am not the geeting the beep sound louder enough i tried to check by connecting separately the buzzer to pin 6 and pin7 only the pin 6 is malking the buzer sound and pin 7 does not making anything when i check the voltages of the both pins it is showing 2.9v i dont understand what is this issue can you please verify my code and le t me know if there is anything wrong or suggest me some ideas it could be helpful for me to make the buzzer beep louder

RE: how to configure two gpio pin in High drivemode 5mA

Ole Bauck — Mon, 07 Dec 2015 14:57:46 GMT

S0S1 means standard drive in sink ('0') and standard drive in source ('1'). To source and sink in high drive you can use H0H1:

NRF_GPIO->PIN_CNF[6] |= (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos);
NRF_GPIO->PIN_CNF[7] |= (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos);

See the Reference Manual for more information (chapter 14 - GPIO).