File content as of revision 0:7ee4334a99fc:

#include "mbed.h"
#include "FastPWM.h"
// https://developer.mbed.org/forum/electronics/topic/15346/
//------------------------------------
//Emission pgrm for the patient transmetting device. It uses the source code 
//originally made for Arduino. It has been first designed by S.Sahuguede
//------------------------------------
 /* 17.10.2018 sketch modified by Kostiantyn Vasko together with Borys Shtanhei
 * Transmitting by IR LED with 38kHz Freq FOR STM32
 * Important pins:
 * D1 - Tx
 * D0 - Rx
 * D10 - PWM
 * A0 - Analog input for ECG
 */
//Serial Com defined for Tx=D8 and Rx=D2 at 4800 bauds
Serial Serial2(D8,D2,38400); 

//Initializing of clock Output
FastPWM mypwm(D10,1);

//init variables 
int cptmesure = 0;
unsigned int analogin;

//VALUE TO MODIFY BY PATIENT
unsigned int patient=2;

//creation of variables for transmission control
int verif;

AnalogIn X(A0);

int main() {
    //pwm_io(16, 0.5); //26.041 us with a duty cycle of 50% ==> Here I get 38kHz as Output with 16µs...
    
    //Bytes variables which gonna be sent
    unsigned int  trame1,trame2,trame3,trame8, trame9;
    
    //Clock settings for 38kHz
    //mypwm.period_us(26);//26
   // mypwm.pulsewidth_us(13);//13
    
    //Serial Com data sent
    uint8_t TrameTab[6];    
    
    //Clock settings for 455kHz
    mypwm.period_us(2.1978);
    mypwm.pulsewidth_us(1.0989);//Duty-Cycle 50% here
    while(1) 
    {
        analogin = (int16_t) (65535 * X.read());// Read ECG signal and transforming into digit.
          
        trame2=(analogin & 0xFF00) >> 8;//mask 1111 1111 0000 0000 (ECG signal 16 bit)
        trame3=(analogin & 0xFF);//mask 0000 0000 1111 1111 
          
        //increment of measurement: avoids the redundancy of the display on the server
        cptmesure++;
        if(cptmesure==8)
        {
            cptmesure=0;
        }
          
        verif =  (trame2 << 3) + cptmesure ; 
        
        //first frame: patient + verif (2 bits high)
        trame1= (patient << 4) + ((verif & 0x700)>>7);//mask 111 0000 0000
        
        trame8= (verif & 0xFF);//mask 1111 1111
        
        //fifth frame: patient + increment measurement
        trame9= (patient << 4) + (cptmesure << 1);
        
        //We fill the table which gonna be sent
        TrameTab[0] = 255;  
        TrameTab[1] = trame1;
            
        TrameTab[2] = trame2;   
        TrameTab[3] = trame3;
            
        TrameTab[4] = trame8;
        TrameTab[5] = trame9;
        
        //We sent the table through the serial port
        Serial2.write(TrameTab,6,0,0);
        //Serial.write pour envoyer l'information sous 8 bits. Serial.print envoi un nombre chiffre par chiffre à utiliser pour avoir un affichage sur le moniteur.
        
        wait(0.0025);
    }
}