Central Applications - Mbed Code repo / Mbed OS MAX30205_Demo

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   MAX30205 max32630fthr

Fork of MAX30205_Demo by Corey Harris

main.cpp

Committer:
coreyharris
Date:
2017-08-16
Revision:
1:1cab60b84d7f
Parent:
0:6e28e543a11c
Child:
2:cf07a3eb2f30

File content as of revision 1:1cab60b84d7f:

#include "mbed.h"
#include "max32630fthr.h"
#include "MAX30205.h"

MAX32630FTHR pegasus(MAX32630FTHR::VIO_3V3);

bool temp_sensor_config(MAX30205 &temp_sensor);


int main()
{
    
    Serial pc(USBTX, USBRX);
    pc.baud(115200);
        
    DigitalOut rLed(LED1, LED_OFF);
    DigitalOut gLed(LED2, LED_OFF);
    DigitalOut bLed(LED3, LED_OFF);
    
    I2C i2cBus(I2C1_SDA, I2C1_SCL);    
    
    MAX30205 * temp_sensor;
    temp_sensor = new MAX30205(i2cBus, 0x48);
    int rc = temp_sensor_config(*temp_sensor);
    
    Timer temp_sensor_sampleTimer;
    temp_sensor_sampleTimer.start();
    
    MAX30205::Configuration_u temp_cfg;
    uint16_t rawTemperatureRead, temp_conversion_flag;
    float temperature;
    
    while(1) {
        
        if( rc == 0 ) {
        
            /* Start a new temperature conversion */
            if ( temp_sensor_sampleTimer.read() > 1.0 && !temp_conversion_flag){
                
                temp_cfg.bits.one_shot = 1;
                rc = temp_sensor->writeConfiguration(temp_cfg);    
                temp_conversion_flag = 1;
                
            } 
            
            /* Read the completed temperature conversion */
            if ( temp_sensor_sampleTimer.read() > 1.05 && temp_conversion_flag ){
                
                temp_conversion_flag = 0;               
                rc = temp_sensor->readTemperature(rawTemperatureRead); 
                temperature = temp_sensor->toCelsius(rawTemperatureRead);
                temp_sensor_sampleTimer.reset(); 
                
                pc.printf("Temperature is %2.3f deg. C \r\n", temperature);
                  
            }
        
        }else{
            pc.printf("Something went wrong, check the I2C bus or power connections... \r\n");
            bLed = LED_OFF;
            gLed = LED_OFF;
            while(1){
                rLed = !rLed;
                wait(0.5);   
            }
        }
    }
}


bool temp_sensor_config(MAX30205 &temp_sensor){
     
    int rc = 0;
    
        MAX30205::Configuration_u temp_cfg;
        if(rc == 0) 
        {
            temp_cfg.all = 0;
            temp_cfg.bits.shutdown = 1;
            temp_cfg.bits.comp_int = 1;
            temp_cfg.bits.os_polarity = 0;
            temp_cfg.bits.fault_queue = 1;
            temp_cfg.bits.data_format = 0;
            temp_cfg.bits.timeout = 0;
            temp_cfg.bits.one_shot = 0;
        
            rc = temp_sensor.writeConfiguration(temp_cfg);    
        
        }
    
    return rc;
}