After all that it'd be great to know what the problem was, Glenn  ;)

Bruce

> ok, got the UART working... ended up using some
example code from the TI
> website... i must have changed something in it before that stuffed up the
> initialization... but thanks for all your help on that one Hugh...

i can't really see what the problem was... i ended up creating a new
project, and writing the code again & it worked.. perhaps it was something
else apart from the code... but anyway, for future newbies trying to get the
UART going, here's the code, most of it flogged from one of the c sample
files:

void usart0_init(void)
//Clock sourceLK
//Desired baud8400
//Actual  baud8392
{
  UCTL0 = CHAR;                         // 8-bit character
  UTCTL0 = SSEL0;                       // UCLK = ACLK
  UBR00 = 0x45;                         // 8MHz 115200
  UBR10 = 0x00;                         // 8MHz 115200
  UMCTL0 = 0x2A;                        // 8MHz 115200 modulation
  ME2 |= UTXE0 + URXE0;                 // Enabled USART0 TXD/RXD
  IE2 |= 0x00;//UTXIE0;                        // Enabled USART0 RX
interrupt
  P3SEL |= 0x30;                        // P3.4,5 = USART0 TXD/RXD
  P3DIR |= 0x10;                        // P3.4 output direction
}

void Start_HFXtal(void)
{
  char i;
  
  BCSCTL1 |= XTS;                       // ACLK = LFXT1 = HF XTAL

  do 
  {
  IFG1 &= ~OFIFG;                       // Clear OSCFault flag
  for (i = 0xFF; i > 0; i--);           // Time for flag to set
  }
  while ((IFG1 & OFIFG) != 0);          // OSCFault flag still set?


  BCSCTL2 |= SELM1+SELM0;               // MCLK = LFXT1 (safe)
}

void setup_watchdog()
{
   WDTCTL = WDTPW + WDTHOLD;             // Stop WDT
}

void main(void)
{
  unsigned int i;
  
  setup_watchdog();   // Set up the watchdog timer...
  Start_HFXtal();
  usart0_init();
  _EINT();            // Enable interrupts
  
  for (;;)                             
  {
    for (i=0;i<255;i++)
    {
      putchar(i);
    }
  }
}

-----Original Message-----
From: Bruce Cannon [mailto:brucecannon@bruc...]
Sent: Thursday, 13 February 2003 4:59 p.m.
To: msp430@msp4...
Subject: RE: [msp430] UART Initialization


After all that it'd be great to know what the problem was, Glenn  ;)

Bruce

> ok, got the UART working... ended up using some
example code from the TI
> website... i must have changed something in it before that stuffed up the
> initialization... but thanks for all your help on that one Hugh...



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