BH1790GLC-EVK-001

BH1790GLC-EVK-001 Software document Feb/07/2017 Sensor Application G © 2017 ROHM Co.,Ltd. Optical Sensor for Heart Rate Monitor (BH1790GLC) ■ Sketch file(BH1790GLC.ino) • setup function • • • • • loop 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 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 © 2017 ROHM Co.,Ltd. P. 1 Optical Sensor for Heart Rate Monitor (BH1790GLC) ■ Library files (BH1790GLC.h, BH1790GLC.cpp) • constructor • • init function 1. 2. 3. 4. • Execute get_rawval function Create Optical Sensor Data with LED ON/OFF write function • • Get the 4bytes raw value from register address 0x54 get_val function • • • Read and check PART_ID, PID and MANUFACTURER_ID register value Write to MEAS_CONTROL1 register (RDY=1, LED_LIGHTING_FREQ=128Hz, RCYCLE=32Hz) Write to MEAS_CONTROL2 register (LED_EN[1:0] = 00, LED_ON_TIME=0.3ms, LED_CURRENT=10mA) Write to MEAS_START register (MEAS_ST=1) get_rawval function • • do nothing General write function for BH1790GLC read function • General read function for BH1790GLC © 2017 ROHM Co.,Ltd. P. 2 © 2017 ROHM Co.,Ltd. Notice Notes 1) The information contained herein is subject to change without notice. 2) Before you use our Products, please contact our sales representative and verify the latest specifications : 3) Although ROHM is continuously working to improve product reliability and quality, semiconductors can break down and malfunction due to various factors. Therefore, in order to prevent personal injury or fire arising from failure, please take safety measures such as complying with the derating characteristics, implementing redundant and fire prevention designs, and utilizing backups and fail-safe procedures. ROHM shall have no responsibility for any damages arising out of the use of our Poducts beyond the rating specified by ROHM. 4) Examples of application circuits, circuit constants and any other information contained herein are provided only to illustrate the standard usage and operations of the Products. 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ROHM shall have no responsibility whatsoever for any dispute arising out of the use of such technical information. 6) The Products are intended for use in general electronic equipment (i.e. AV/OA devices, communication, consumer systems, gaming/entertainment sets) as well as the applications indicated in this document. 7) The Products specified in this document are not designed to be radiation tolerant. 8) For use of our Products in applications requiring a high degree of reliability (as exemplified below), please contact and consult with a ROHM representative : transportation equipment (i.e. cars, ships, trains), primary communication equipment, traffic lights, fire/crime prevention, safety equipment, medical systems, servers, solar cells, and power transmission systems. 9) Do not use our Products in applications requiring extremely high reliability, such as aerospace equipment, nuclear power control systems, and submarine repeaters. 10) ROHM shall have no responsibility for any damages or injury arising from non-compliance with the recommended usage conditions and specifications contained herein. 11) ROHM has used reasonable care to ensur the accuracy of the information contained in this document. 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