How to get accelerometer value of Thingy:91?

[Yusuke]

I want to tranceive data to ADXL362 through SPI and refer to this program.

https://github.com/Rallare/fw-nrfconnect-nrf/tree/nrf9160_samples/samples/nrf9160/spi

However, I can't get data.

I only modified tx_buffer value.

void spi_test_send(void)
{
	int err;
	u8_t tx_buffer[1] = {0x00}; // Modified here
	u8_t rx_buffer[1];

	const struct spi_buf tx_buf = {
		.buf = tx_buffer,
		.len = sizeof(tx_buffer)
	};
	const struct spi_buf_set tx = {
		.buffers = &tx_buf,
		.count = 1
	};

	struct spi_buf rx_buf = {
		.buf = rx_buffer,
		.len = sizeof(rx_buffer),
	};
	const struct spi_buf_set rx = {
		.buffers = &rx_buf,
		.count = 1
	};

	err = spi_transceive(accel_spi_dev, &spi_cfg, &tx, &rx);
	if (err) {
		printk("SPI error: %d\n", err);
	} else {
		/* Connect MISO to MOSI for loopback */
		printk("TX sent: 0x%02x\n", tx_buffer[0]);
		printk("RX recv: 0x%02x\n", rx_buffer[0]);
//		tx_buffer[0]++;
	}	
}

Also, I added nrf9160_pca20035_v0_3_0.overlay file.

Any tip?

[MJD093]

I am trying to do the same thing, Zephyr do have a sensor example for the ADXL362.

/path/to/ncs/zephyr/samples/sensor/adxl362

As Didrik says, this example uses the sensor.h API library. Don't ask me how to get it to work though, it straight up refused to get the device for 2 hours then randomly started working and I didn't change the example code apart from enabling SPI in the prj.conf .

[Yusuke]

May I ask one more related question?

I want to configure motion detection function of ADXL362 and let it output H level when it detects movement. This is a simple function.

How can I achieve this? 

To do so, you need to write value in a certain register through SPI. 

However, there is no writing and even reading functions in sensor.h. 

I added the above spi_test_send function to  /path/to/ncs/zephyr/samples/sensor/adxl362 program but it returns -35 error code. Any help?

[MJD093]

That's weird, have you had success flashing applications to your Thingy:91 in the past?

Try flashing this to your Thingy:91 with the nRF Connect Programmer app
It should configure your ADXL362 and print XYZ data to the terminal.

The main functionality of this sample is 30 second online (green LED flashing) when motion is detected.

It will start up in online mode and sleep after 30seconds of no activity. Shake it to wake it up. It's not very sensitive atm due to this issues I'm having with the Z axis so shake it reasonably or flip the orientation.

1325.merged.hex

I still don't know why the DevZone adds that number at the start of the file, do rename it to just merged.hex to avoid any computer issues.

[Yusuke]

Great! It works out!

What's wrong with my code.....

[MJD093]

Not sure to be honest, it should have been simple for the code sample I posted to work. All I needed was the code, a prj.conf and  a generic CMakeList.txt.

It really did look like your Thingy:91 was acting like it had been reflashed without an erase command.

[Didrik Rokhaug]

I agree with MJD093 in that it looked like a missing erase command. To rule out any issues with your code, can you try to program your code using the programmer application?

[Dheeraj]

Hi Yusuke, 

I am facing the same rebooting issue as above on nRF9160 DK (PCA10090).

Actually, I bought the new nRF9160 DK (PCA10090) and trying to connect it, but unfortunately, its getting reboot automatically (Logs similar as above).

I have tried to flash the latest Nordic's pre-compiled Image from nRF9160 DK ==> Downloads [ nrf9160dk_asset_tracker_09-10-2019_c9c833b1.hex ], but no luck. 

I have tried to compile manually with v1.1.0 branch code, no use. 

Could you please help me with this issue. 

Refer me, how you had overcome with this issue. 

This is a roadblock for me. 

Thank you. 

[Didrik Rokhaug]

Hi, Dheeraj.

I looked at the ticket you have, where Heidi is helping you.

She is waiting for a reply to her latest comment. Could you try to work with her to solve your problem?

Best regards,

Didrik

[Dheeraj]

Hi Didrik,

I hope you are doing good..!! 

Yes. She is trying to help me. But looks like this is pretty much a critical issue. 

Please suggest me, if you have some solution as it completely blocked my work. 

I hope you might have remembered, as we are NOT able to flash the nRF52840 on thingy91 (PCA20035) device using " mcumgr " (MCUBoot driver issue on Windows 10),

[   https://devzone.nordicsemi.com/f/nordic-q-a/53730/nrf-connect-v3-2-0-issue-for-nfr9160  ]

I have bought this nRF9160 DK (10090), but unfortunately, it is NOT working as expected. 

I am wondering nRF9160 DK (10090) is NOT working with pre-compiled Images provided by Nordic as well.  

Thank you.