WEEK 9 & 10


OBJECTIVE 

1. To build program to communicate output of the calculation to notebook for analysis and display the output

PROCEDURE

• There are three part of data to be sent through serial port. first as below

/*Procedure to send the following data out the serial communicaitons port */

/* BPM - Heart Rate in Beats per Minute */

/*Procedure to send the following data out the serial communications port */

/*(IRDiff) - IR Difference between the IRFilt and the IR_DC signals */

/*(5*dIRFilt) - Output of the High Pass Filter (Differentiator)*/

/*(5*Peak) - Output from the Peak Follower Algorithm*/

void PrintIRDat(void)

                {

//            sprintf(message,"%d  %d  %d\r\n",(int)IRDiff,(int)(5.*dIRFilt),(int)(5.*Peak));

                itoa((int)IRDiff,buf,10);

                strcpy(message,buf);

                strcat(message,"  ");

                itoa((int)(5.*dIRFilt),buf,10);

                strcat(message,buf);

                strcat(message,"  ");

                itoa((int)(5.*Peak),buf,10);

                strcat(message,buf);

                strcat(message,"\r\n");

                SendString(message);

                }

• Second part is to send buffered data

/* send the following data out the serial communicaiton port                     */

/*(RDat) - Buffered RFilt                                                                      */

/*(R_DCDat) - Buffered DC signal from the RED Source                            */

/*(IRDat) - Buffered IRFilt                                                                   */

/*(IR_DCDat) - Buffered DC signal from the IR Source                             */

void PrintDat(void)

                {

//            sprintf(message,"%u  %u  %u  %u\r\n",RDat,R_DCDat,IRDat,IR_DCDat);

                itoa(RDat,buf,10);

                strcpy(message,buf);

                strcat(message,"  ");

                itoa(R_DCDat,buf,10);

                strcat(message,buf);

                strcat(message,"  ");

                itoa(IRDat,buf,10);

                strcat(message,buf);

                strcat(message,"  ");

                itoa(IR_DCDat,buf,10);

                strcat(message,buf);

                strcat(message,"\r\n");                               

                SendString(message);

                }

• The last part is to send SpO2 wave data

/* SPO2ave - Oxygen Saturation in percent */

void PrintResults(void)

                {

                itoa(BPM,buf,10);

                strcpy(message,buf);

                strcat(message,"  ");

                itoa(SPO2ave,buf,10);

                strcat(message,buf);

                strcat(message,"\r\n");                               

                SendString(message);

                }

CONCLUSION

• The communication to serial port is important to analyze the output and calibrate to make sure the output reading can produce stable and repeatable result.