File content as of revision 0:23e85e8989fc:

#include "mbed.h"
#include "ID12RFID.h"

ID12RFID rfid(p27); // uart rx
Serial pc(USBTX,USBRX);

DigitalOut interrupt(p23);
DigitalOut MSB(p21);
DigitalOut LSB(p22);
DigitalOut led1(LED1);
DigitalOut led2(LED2);
DigitalOut led3(LED3);

float speedModifiers[] = {
    1.0, 0.7, 0.5, 0.3
};

int speedTags[] = {
    5452129,
    5449063,
    36902518
};

volatile int tag = 0;
volatile bool tagRead = false;

int intCorrection;

void readCard();
void checkTag();

void readCard() {
    // First, disable interrupts to allow critical sections to run through
    NVIC_DisableIRQ(UART2_IRQn);
    //led3 = !led3;
    if(rfid.readable()) {
        tag = rfid.read();
        tagRead = true;
        bool match = false;
        int length = (sizeof(speedTags)/sizeof(speedTags[0]) < sizeof(speedModifiers)/sizeof(speedModifiers[0])) ? (sizeof(speedTags)/sizeof(speedTags[0])) : (sizeof(speedModifiers)/(sizeof(speedModifiers[0])));
        for (int i=0; i<length; i++) {
            if (speedTags[i] == tag) {
                printf("RFID Tag number : %d\nSpeed now at %d\n", tag, ((int)(speedModifiers[i]*100)));
                match = true;
                intCorrection++;
            }
        }
    
        // For some reason, this function is entered twice each time an RFID tag is read.
        // This bit here is to detect that case and just ignore it, while still catching
        // other cases and displaying a warning
        if (!match and intCorrection == 0) {
            printf("[ WARNING ] Tag number %d not recognized\n", tag);
        }
        else if (!match == 1) {
            intCorrection = 0;
        }
    }
    
    NVIC_EnableIRQ(UART2_IRQn);
}

void checkTag() {
}

int main() {
    interrupt=0;
    rfid.setInterrupt(&readCard);
    printf("Entering main loop\n");
    while(1) {
        if (tagRead) {
            checkTag(); 
        if(tag==5452129 || tag==5449063) LSB=1;
        else LSB=0;
        if(tag==5449063 || tag==36902518) MSB=1;
        else MSB=0;
        interrupt=1;
        led1=MSB;
        led2=LSB;
        led3=interrupt;
        wait(.5);
        interrupt=0;  
        led3=interrupt;      
        tagRead = false;}
        //led1 = 1; wait(0.5);
        //led1 = 0; wait(0.5);
        wait(.1);
    }
}