© 2017 ROHM Co.,Ltd.
BH1790GLC-EVK-001
Software document
Feb/07/2017
Sensor Application G
P. 1
© 2017 ROHM Co.,Ltd.
Optical Sensor for Heart Rate Monitor (BH1790GLC)
■ Sketch file(BH1790GLC.ino)
•setup function
•Setup serial function(115200bps) to output log data on Serial Monitor
•Initialize I2C(Wire.begin function) and setup I2C clock(400kHz)
•Initialize BH1790GLC
•Setup 32Hz timer and start
•loop function
•Check the flag about 32Hz period
•Get the values Optical Sensor Data with LED ON/OFF and display them
•timer_isr function
•Function to execute @ 32Hz interval
P. 2
© 2017 ROHM Co.,Ltd.
Optical Sensor for Heart Rate Monitor (BH1790GLC)
■ Library files (BH1790GLC.h, BH1790GLC.cpp)
•constructor
•do nothing
•init function
1. Read and check PART_ID, PID and MANUFACTURER_ID register value
2. Write to MEAS_CONTROL1 register (RDY=1, LED_LIGHTING_FREQ=128Hz,
RCYCLE=32Hz)
3. Write to MEAS_CONTROL2 register
(LED_EN[1:0] = 00, LED_ON_TIME=0.3ms, LED_CURRENT=10mA)
4. Write to MEAS_START register (MEAS_ST=1)
•get_rawval function
•Get the 4bytes raw value from register address 0x54
•get_val function
•Execute get_rawval function
•Create Optical Sensor Data with LED ON/OFF
•write function
•General write function for BH1790GLC
•read function
•General read function for BH1790GLC
© 2017 ROHM Co.,Ltd.
R1102
A
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