SFH5721 datasheet(39/54 Pages) OSRAM

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SFH 5721

DATASHEET

39 | Version 1.1 | 2022-02-28

Sample Code

This section introduces you to a very basic dummy code for implementation of the Sensor. The write

and read register functions are hardware dependent. The following code example shows you how to

reset the sensor, do the interrupt a measurement configuration and finally how to start and get data

from the sensor.

Reset:

// Reset Sensor to default state

I2C_8_write_register(0x00, 0b10000000); // Reset in Operation selection register

Example Configuration:

// Example Configurate for interrupt settings

I2C_8_write_register(0x02, 0b00110000); // Enable High & Low IR for ALS Channel

I2C_8_write_register(0x03, 0b00100000); // Configurate IR settings

I2C_8_write_register(0x04, 0b11001100); // Define Low Threshold LSB (30% of 16bit)

I2C_8_write_register(0x05, 0b01001100); // Define Low Threshold MSB (30% of 16bit)

I2C_8_write_register(0x06, 0b11111111); // Define High Threshold LSB (75% of 16bit)

I2C_8_write_register(0x07, 0b10111111); // Define High Threshold MSB (75% of 16bit)

// Example Configuration for measurement settings

I2C_8_write_register(0x09, 0b00111001); // Set AGAIN=4 & IT=25ms in MCONFA

I2C_8_write_register(0x0A, 0b00011000); // Set Wait=100ms & DGAIN=1 in MCONFB

I2C_8_write_register(0x0B, 0b00010100); // Set LPFDEPTH=3 & enable Filter in MCONFC

Enable:

// Start Procedure by enabling required mode and channel

I2C_8_write_register(0x00, 0b00000100); // Enable Async Continuous mode & ALS Channel

Readout manually or after number of interrupts:

// Read and print out sensor data from ALS Data Register Addresses of i2c address

LSB = I2C_8_read_register(0x26, 0x10); // Read DATA3L register from sensor address

MSB = I2C_8_read_register(0x26, 0x11); // Read DATA3H register from sensor address

ALS_count = (MSB << 8) | LSB;

// Shifting together LSB & MSB for ALS channel counts

Print(ALS_count);

// Print out ALS count

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