Lpc2000

I am having some problems getting the interrupt to fire on the
LPC2138 board. I know it is just me missing something, but I don't
know what I'm missing.

I am using the emulator in the Keil IDE. What I want is when I type
in the serial area that it fires my interrupt. I don't believe it is
a limitation of the emulator and I suspect it is my code.

CODE SNIPPETTS
*******************************
In Startup.s
*******************************
// Pre-defined interrupt handlers that may be directly
// overwritten by C interrupt functions
EXTERN CODE32 (Undef_Handler?A)
EXTERN CODE32 (SWI_Handler?A)
EXTERN CODE32 (PAbt_Handler?A)
EXTERN CODE32 (DAbt_Handler?A)
EXTERN CODE32 (IRQ_Handler?A)
EXTERN CODE32 (FIQ_Handler?A)

// Exception Vectors
// Mapped to Address 0.
// Absolute addressing mode must be used.

Vectors: LDR PC,Reset_Addr
LDR PC,Undef_Addr
LDR PC,SWI_Addr
LDR PC,PAbt_Addr
LDR PC,DAbt_Addr
NOP /* Reserved Vector */
; LDR PC,IRQ_Addr
LDR PC,[PC, #-0x0FF0] /* Vector from
VicVectAddr */
;LDR PC,

Reset_Addr: DD Reset_Handler
Undef_Addr: DD Undef_Handler?A
SWI_Addr: DD SWI_Handler?A
PAbt_Addr: DD PAbt_Handler?A
DAbt_Addr: DD DAbt_Handler?A
DD 0 /* Reserved Address */
IRQ_Addr: DD IRQ_Handler?A
FIQ_Addr: DD

********************************
In main.c:
********************************
/* initialize the serial interface */
PINSEL0 = 0x00050000; /* Enable RxD1 and TxD1 */
U1LCR = 0x83; /* 8 bits, no Parity, 1 Stop bit */
U1DLL = 97; /* 9600 Baud Rate @ 15MHz VPB Clock */
U1LCR = 0x03; /* DLAB = 0 */

VICIntSelect = 0x00000000; // SPI0, I2C UART1, and UART0 are
                           // bit 10, 9, 7 and bit 6 = 0
VICIntEnable = 0x00000080; // UART1 is enabled

VICDefVectAddr = (unsigned)IRQ_Handler; // Default / Non vectored 
interrupt handler.
VICVectAddr0 = (unsigned)uart1;         // UART1,
VICVectCntl1 = 0x00000027;              // UART1,

while(1);
}


void uart1() __irq {
switch ( U1IIR ) {
case 0x0006:
       // case 0110 interrupt - Recieve Line Status interrupt
       // check U1LSR for status
       // OE if 0x0020 Overrun Error - hold off on writing
       // PE if 0x0040 Parity Error
       // FE if 0x0080 Framing Error
       // BI if 0x0100 Break Interrupt

break;
case 0x0004:
       // case 0100 interrupt - Receive Data Available interrupt
       // Data is available, go read it.
case 0x00C0:
       // case 1100 interrupt - Character Timeout Indicator interrupt
       // This happens when bytes are left in the FIFO but there are
       // not enough bytes to trigger an RDA. This means the bytes 
have
       // sat there long enough to time out and tell you to read 
them.

case 0x0020:
       // case 0010 interrupt - Transmit Hold Register Empty 
Interrupt.
       // This occurs when the transmit FIFO haddata in it and is 
now empty.
break;
case 0x0000:
       // case 0000 interrupt - Modem Interrupt
       // This occurs when a modem breaks in.
break;
default:
break;
}
}

Thanks in advance.

Mike H.