Reading from three readers at the same time

I'm trying to read from three rfid readers at the·same time. I'm able to read from one reader but when i try to read from all of them i am able to read only from one or·from none of them.
In the following pieces of code, I only mention 2 readers, but I once I get this working, I want to scale it to 3 readers.


1)In this piece of code, when i enable multiple readers , it doesn't read from none of them


static int index = 0;
··· final static int rxPin1 = CPU.pin1; // Pin for serial from reader 1
··· static Uart rxUart1 = new Uart(Uart.dirReceive, rxPin1, Uart.dontInvert,
·································· Uart.speed2400, Uart.stop1);
··· final static int rxPin2 = CPU.pin3; // Pin for serial from reader 2
··· static Uart rxUart2 = new Uart(Uart.dirReceive, rxPin2, Uart.dontInvert,
·································· Uart.speed2400, Uart.stop1);
··· static char c;
··· static PrintStream ps = new PrintStream();
· public static void main() {

· CPU.writePin(CPU.pin0,false);//Enable Reader 1
· CPU.writePin(CPU.pin2,false);//Enable Reader 2
·· while(true) { //loop forever
····· //wait for '\n'
····· while(true)· {
················· if ( rxUart1.byteAvailable())
········ {
··········· c=(char)rxUart1.receiveByte();
··········· if (c=='\n') break;
········ }
····· }
····· //read 10 bytes and display
····· index=0;
····· while (index<10) {
······· if (rxUart1.byteAvailable()) {
·········· c = (char)rxUart1.receiveByte();
········· ps.print(c);
·········· index++;
········ }
····· }
····· ps.print('\n');

···· ·}


2)In this piece of code, when i·use loops for the·multiple readers ,·I can read form the first·reader ONLY one time, and nothing get read from the others.

static int index = 0;
··· final static int rxPin1 = CPU.pin1; // Pin for serial from reader 1
··· static Uart rxUart1 = new Uart(Uart.dirReceive, rxPin1, Uart.dontInvert,
·································· Uart.speed2400, Uart.stop1);
··· final static int rxPin2 = CPU.pin3; // Pin for serial from reader 2
··· static Uart rxUart2 = new Uart(Uart.dirReceive, rxPin2, Uart.dontInvert,
·································· Uart.speed2400, Uart.stop1);
··· static char c;
··· static PrintStream ps = new PrintStream();
· public static void main() {

·· while(true) { //loop forever
····· //wait for '\n'
····· while(true)· {
········ CPU.writePin(CPU.pin0,false);//Enable Reader 1
········ if ( rxUart1.byteAvailable())
········ {
··········· c=(char)rxUart1.receiveByte();
··········· if (c=='\n') break;
········ }
····· }
····· //read 10 bytes and display
····· index=0;
····· while (index<10) {
······· if (rxUart1.byteAvailable()) {
·········· c = (char)rxUart1.receiveByte();
········· ps.print(c);
·········· index++;
········ }
····· }
····· ps.print('\n');


····· //wait for '\n'
····· while(true)· {
········ CPU.writePin(CPU.pin2,false);//Enable Reader 2
········ if ( rxUart2.byteAvailable())
········ {
··········· c=(char)rxUart2.receiveByte();
··········· if (c=='\n') break;
········ }
····· }
····· //read 10 bytes and display
····· index=0;
····· while (index<10) {
······· if (rxUart2.byteAvailable()) {
·········· c = (char)rxUart2.receiveByte();
········· ps.print(c);
·········· index++;
········ }
····· }
····· ps.print('\n');
···· } //end loop forever
·· }
·}

Please let me know how i can fix this problem. Thank you.