programing the Max30105 with nrf52840

[nikola]

I am in the process of programming the MAX30105 sensor with the NRF52840 board to obtain the oxygen concentration values
I tried to use the library that already exists in the arduino which contains the .h and .c files of this sensor by using this link :

https://github.com/sparkfun/MAX30105_Particle_Sensor_Breakout/tree/master/Libraries/Arduino/src

I'm trying to translate the code into C language so that it can be used in Segger embeded studio 

I had no idea how to transform these lines of code :

_i2cPort = &wirePort; //Grab which port the user wants us to use

_i2cPort->begin();
 _i2cPort.setClock(i2cSpeed);

//Get ready to read a burst of data from the FIFO register
_i2cPort->beginTransmission(MAX30105_ADDRESS);
 _i2cPort->write(MAX30105_FIFODATA);
_i2cPort->endTransmission();

 temp[2] = _i2cPort.read();

Can you help me ?

[Simon]

I would recommend you to ask about this in some C/C++ specific forums.

By the way, if you browse DevZone, you will find already written drivers for the nRF5 SDK and MAX30105:

• https://devzone.nordicsemi.com/f/nordic-q-a/42526/trying-to-start-developing-driver-for-max30105
• https://devzone.nordicsemi.com/f/nordic-q-a/43624/arduino-twi-to-nrf52-twi-conversion
• https://devzone.nordicsemi.com/f/nordic-q-a/49882/how-to-interface-external-twi-sensor-max30105-with-nordic-thingy-52-application-source

If you're using NCS, you can use the sample <ncs location>\zephyr\samples\sensor\max30101. I'm not sure how different max30101 is from the max30105, but you might have to modfiy it a little. In addition you need to add an overlay file for the nrf52840dk.

Best regards,

Simon