How can I set the trigger of the adxl362 to a specific value?

Question

Hi, I am working with the adxl362 sensor on the Thingy91 and I want to set the trigger of the sensor to a specific value. 
 In the datasheet ( https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL362.pdf ), it says that the threshold should be adjustable. In the Zephyr Documentation ( https://docs.zephyrproject.org/latest/reference/peripherals/sensor.html ), I found that there is a SENSOR_TRIG_THRESHOLD and that it can be configurated with SENSOR_ATTR_LOWER_THRESH and SENSOR_ATTR_UPPER_THRESH , but I have no idea how to use them in the code. Does someone could give me an example code line on how to set the trigger? 
 Thanks for your help!

Bergmann · Accepted Answer

I solved it by my own with the help of the timing diagram: 
 
 I have a working code for the read area of the diagram and I need a code that works for the write area of the diagram. I need to expand the buffer and send 3 bytes instead of 2. The working code is: 
 void spi_write_reg(void)
{
 u8_t cmd = 0x0A;
 u8_t reg_addr = 0x20; // register, that you want to write
 u8_t value = 0x46; // value, that you want to set
 void *data = &value;
 int length = 1;
	u8_t access[3] = { cmd, reg_addr, value };

 gpio_pin_write(cs_gpio, cd_pin, 0);

	const struct spi_buf buf[2] = {
 {
 .buf = access,
 .len = 3
 },
 {
 .buf = data,
 .len = length
 }
	};
	struct spi_buf_set tx = {
 .buffers = buf,
	};


	const struct spi_buf_set rx = {
 .buffers = buf,
 .count = 2
	};

	tx.count = 1;

	int spi_result = spi_transceive(spi_dev, &spi_cfg, &tx, &rx);

 // printk("SPI result: %d
",spi_result);
 printk("Value: 0x%02X
", value);

 gpio_pin_write(cs_gpio, cd_pin, 1);

}

How can I set the trigger of the adxl362 to a specific value?

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