Disable GPIO_AS_PINRESET on NCS SDK

[Nhuan]

Hello everyone,

I'm working on an nrf52832 custom board and trying to initialize the SPI module(I configured pin 21 as SCK)

I known pin 21 is a PIN_RESET, so I set CONFIG_GPIO_AS_PINRESET=n, but it did not affect and my application not working.

What's I'm missing?

[Håkon Alseth]

Hi,

 

When you run a firmware that is configured with CONFIG_GPIO_AS_PINRESET=y, it will write to UICR. In order to erase UICR, you have to explicitly do so, or run a erase all (nrfjprog -e -f nrf52).

Could you ensure that you have erased UICR first, then flash the new firmware?

 

Kind regards,

Håkon

[Nhuan]

Hi,

It still not working. 

Here are my SPI configurations and the custom board device tree:

# LIS3DH Config
CONFIG_SPI=y
CONFIG_SPI_1=y
CONFIG_SENSOR=y
CONFIG_LIS2DH=y

# GPIO config
CONFIG_GPIO=y
CONFIG_GPIO_AS_PINRESET=n

&spi1 {
	compatible = "nordic,nrf-spi";
	/* Cannot be used together with i2c0. */
	status = "okay";
	sck-pin = <21>;
	mosi-pin = <20>;
	miso-pin = <19>;
	cs-gpios = <&gpio0 18 GPIO_ACTIVE_LOW>;

	lis2dh12: lis2dh12@0 {
		compatible = "st,lis2dh", "st,lis2dh12";
		reg = <0>;
		spi-max-frequency = <10000000>;
		irq-gpios =  <&gpio0 17 GPIO_ACTIVE_HIGH>;
		label = "LIS2DH12-ACCEL";
	};
};

const struct device *sensor = device_get_binding(DT_LABEL(DT_INST(0, st_lis2dh)));

if (sensor == NULL) {
    LOG_INF("Could not get %s device\n", DT_LABEL(DT_INST(0, st_lis2dh)));
    return;
}

P/s: When I set CONFIG_SPI=n, my application ran, but I couldn't bind the sensor module and received Error log: Could not get LIS2DH12-ACCEL device.

I set CONFIG_SPI=y again, the application didn't run anything.

[Håkon Alseth]

Hi,

 

Nhuan said:

When I set CONFIG_SPI=n, my application ran, but I couldn't bind the sensor module and received Error log: Could not get LIS2DH12-ACCEL device.

This makes sense, as you're using SPI as the transport layer towards your sensor.

 

Nhuan said:

I set CONFIG_SPI=y again, the application didn't run anything.

What do you mean by not running anything? Is there a fault or similar occurring? Or no bus activity?

Have you scoped the SPI lines? not just P0.21, but the others as well.

 

Kind regards,

Håkon

[Nhuan]

Hi, 

I have some information log when my application starts running, and my BLE device will advertise.

But, when I set CONFIG_SPI=y, I can't get any logs, and my device didn't advertise also.

It seems like the program stuck somewhere

[Håkon Alseth]

Hi,

 

If there's no output, have you tried entering debug mode to see where its stuck?

 

Kind regards,

Håkon