File content as of revision 2:34a647292050:

#include "mbed.h"
#include "GT511C3.h"

Serial debug(USBTX,USBRX);

DigitalOut myled(LED1);
GT511C3 finger(p28,p27);

int Enroll(void)
{
    int EnrollID = 10;
    unsigned long Parameter = 0;
    unsigned short Response = 0;
    int sts = 0;

    debug.printf("CMD_EnrollStart\n");
    Parameter = EnrollID;
    sts = finger.SendRecv(GT511C3::CMD_EnrollStart,&Parameter,&Response);
    debug.printf("sts = %d,Response=0x%04x Parameter=0x%08lx\n",sts,Response,Parameter);
    if(sts != 0)
        return sts;
    if(Response != GT511C3::CMD_Ack)
        return -100;
    //
    return sts;
}

int main() {
    unsigned long Parameter;
    unsigned short Response;
    int sts = 0;
    int count = 0;
    int ispress;

    debug.format(8,Serial::None,1);
    debug.baud(115200);

    debug.printf("Init\n");
    finger.Init();
    debug.printf("Open\n");
    Parameter = 0;
    sts = finger.SendRecv(GT511C3::CMD_Open,&Parameter,&Response);
    debug.printf("sts = %d,Response=0x%04x\n",sts,Response);

        Parameter = 1;
        sts = finger.SendRecv(GT511C3::CMD_CmosLed,&Parameter,&Response);
        debug.printf("sts = %d,Response=0x%04x\n",sts,Response);
    while(1) {
        ispress = 0;
        Parameter = 0;
        sts = finger.SendRecv(GT511C3::CMD_IsPressFinger,&Parameter,&Response);
        debug.printf("sts = %d,Response=0x%04x Parameter=0x%08lx\n",sts,Response,Parameter);
        if(sts == 0){
            if((Response == GT511C3::CMD_Ack) && (Parameter == 0)){
                ispress = 1;
            }
        }
#if 0
        myled = 1;
        wait(0.5);
        myled = 0;
        wait(0.5);
#endif
        count++;
    }
}