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.
UART interrupt question
Started by ●September 18, 2005
Reply by ●September 18, 20052005-09-18
I noticed when I posted this that I had
VICVectCntl1 = 0x00000027; // UART1,
But what is actually in my code is
VICVectCntl0 = 0x00000027; // UART1,
Which is right. I did get EINT1 working fine, but still noting on
the uart.
Thanks for the help
Mike Haines --- In lpc2000@lpc2..., "mhaines4102" <mhaines4102@y...>
wrote:
> 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.
VICVectCntl1 = 0x00000027; // UART1,
But what is actually in my code is
VICVectCntl0 = 0x00000027; // UART1,
Which is right. I did get EINT1 working fine, but still noting on
the uart.
Thanks for the help
Mike Haines --- In lpc2000@lpc2..., "mhaines4102" <mhaines4102@y...>
wrote:
> 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.
Reply by ●September 20, 20052005-09-20
OKay, I got it. I was not setting the U1IER. Even though you enable
uarts to interrupt ( VICIntEnable = ) unless the U0IER and U1IER are
set, uarts 0 and 1 do not know what to interrupt on. I should read
more closely.
Thanks,
Mike Haines --- In lpc2000@lpc2..., "mhaines4102" <mhaines4102@y...>
wrote:
> I noticed when I posted this that I had
> VICVectCntl1 = 0x00000027; // UART1,
> But what is actually in my code is
> VICVectCntl0 = 0x00000027; // UART1,
>
> Which is right. I did get EINT1 working fine, but still noting on
> the uart.
>
> Thanks for the help
>
> Mike Haines > --- In lpc2000@lpc2..., "mhaines4102" <mhaines4102@y...>
> wrote:
> > 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.
uarts to interrupt ( VICIntEnable = ) unless the U0IER and U1IER are
set, uarts 0 and 1 do not know what to interrupt on. I should read
more closely.
Thanks,
Mike Haines --- In lpc2000@lpc2..., "mhaines4102" <mhaines4102@y...>
wrote:
> I noticed when I posted this that I had
> VICVectCntl1 = 0x00000027; // UART1,
> But what is actually in my code is
> VICVectCntl0 = 0x00000027; // UART1,
>
> Which is right. I did get EINT1 working fine, but still noting on
> the uart.
>
> Thanks for the help
>
> Mike Haines > --- In lpc2000@lpc2..., "mhaines4102" <mhaines4102@y...>
> wrote:
> > 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.
