Lpc2000

Bertrik and Guille,

Here is my new code.  Still doesn't work right.  I've even tweaked the
MULVAL and DIVVAL numbers to better match the 12Mhz at 9600 baud.  It
doesn't come out perfect with a 12Mhz clock.  P0.8 blinks like mad,
but still no data out on 9600 PROCOMM.  PROCOMM works great directly
to my 9600 baud display.  But can't get it to work thru the 2148
chip's UART1.  Am I still missing something?

Sutton - dodge55

PINSEL0 |= 0x00010000;
PCONP |= 0x00000010;
U1FDR = 0x0000009A;          // MULVAL = 9, DIVVAL = 10
U1LCR = 0x83;	             // enable Divisor Latches
U1DLM = 0;
U1DLL = 0x25;	             // 9601.71 baud
U1LCR = 0x03;                // 8 bits, 1 stop, no parity, DLAB = 0
U1FCR = 1;
U1TER = 0x80;
U1IER = 0;



void my_putchar(char c)
{
   if ((U1LSR & 0x20) != 0)	 // TX buffer empty
   {
      U1THR = c;
   }
}

void display_write(char text[])
{
   unsigned char i;

   sprintf(display_output, "%s", text);
   for (i = 0; i < strlen(display_output); i++)
   {
      my_putchar(display_output[i]);
   }
}






--- In lpc2000@yahoogroups.com, "dodge1955" <sutton@...> wrote:
>
> I'm having a problem with getting UART1 to work on my Embedded Artists
> prototype board.  I have a serial display that has only 1 serial line.
>  In other words, you can only transmit to the display.  I can't get
> P0.8 (UART1 TX) to send any data.  Here is my setup at 9600.  And,
> another question is 'Do I really need an interrupt just to transmit? 
> It seems like throwing a char out to U1THR should suffice.  It's
> probably something simple I'm missing.  Thanks.
> 
> Sutton - dodge55
> 
> 
> VICIntSelect = 0;
> VICVectAddr2 = (unsigned int) uart1_out;
> VICVectCntl2 = 0x20 | 7;  // enables the UART1 interrupt, slot 7
> U1FDR = 0x00000010;   // MULVAL = 1, DIVVAL = 0
> U1DLM = 0;
> U1DLL = 0x48;	 // 9600 baud
> U1LCR = 0x03;     // 8 bits, 1 stop, no parity, DLAB = 0
> U1FCR = 1;
> VICIntEnable |= 0x00000080;
> 
> void display_write(char text[])
> {
>    unsigned char i;
> 
>    sprintf(display_output, "%s", text);
>    for (i = 0; i < strlen(display_output); i++)
>    {
>       my_putchar(display_output[i]);
>    }
> }
> 
> void my_putchar(char c)
> {
>    U1THR = c;
> }
> 
> void uart1_out(void) __irq
> {
>    VICVectAddr = 0;
> }
>