Nevermind, it works...I should smack my head against the wall for a few
minutes.
helio
On Fri, 27 Jun 2003 14:02:50 -0400, helick wrote:
> Harry,
>
> I followed your suggestion and this is what came out:
>
> ------
> BCSCTL1 |= 0x04; //enable xtl2
> _BIC_SR(OSCOFF);
> do
> {
> for(i = 255; i > 0; i--)
> {
> IFG1 &= ~OFIFG;
> }
> }
> while ((OFIFG & IFG1) != 0);
> BCSCTL2 = 0x88;
> -------
>
> Now it will get out of the loop and apparently try to do something.
> The baud rate is set to 9600bps, but the scope shows signals coming out
> very slowly from P3.4, nothing close to 9600bps. I played around changing
> the baud in the program and it only changes slightly.
>
> From what I could see, it takes a while to get to the next interrupt. If
> I just "continue" with no breakpoints in gdb/insight, it just sits there;
> but if I insert a breakpoint in the middle of the loop (in main()), each
> iteration takes a while.
> Is that related to running it from the debugger?
>
> Running it from the power supply shows nothing on P3.4
>
> Please let me know.
>
> -helio
>
> P.S. The UART0 config is the same as the original message.
>
>
> On Fri, 27 Jun 2003 13:11:28 +1000, Harry Lemmens wrote:
>
>> Try putting the for(i... ) Loop around the crystal osc "do" loop and test.
>> The osc starts up, but stops as it is bouncing by the time you try to switch
>> to it, it has failed. This subject has been covered in just the last week,
>> so look back over the archive ...
>>
>> Cheers
>> Harry
>>
>> Home Phone(03) 9504 1957
>> Mobile 0419 154 602
>>
>> [email protected]
>>
>>
>>
>>
>> -----Original Message-----
>> From: [email protected]
>> [mailto:[email protected]]on Behalf Of helick
>> Sent: Friday, June 27, 2003 12:34 PM
>> To: [email protected]
>> Subject: [Mspgcc-users] more on clock source and UART
>>
>> Hello again,
>>
>> I am still having trouble with the serial communication portion of my
>> code.
>> From reading previous posts I composed the code bellow, which seems to be
>> correct, but the msp430f149 seems to have some peculiarities, so I am not
>> completely sure.
>>
>> The code will hang on the clock initialization on both insight/gdb and
>> just running the thing on it's own power...I am pretty much out of ideas.
>>
>> Please point out anything that might be wrong with this thing.
>>
>> Thank you in advance.
>>
>> helio
>>
>> --------
>>
>> void setup (void)
>> {
>> unsigned int i;
>>
>> //port/pin setup for the specialCOMM
>> P3DIR |= BIT4;
>> P3SEL |= BIT4; // Select pins to alternate function
>>
>> //clock setup
>> BCSCTL1 |= 0x04; //enable xtl2
>> _BIC_SR(OSCOFF);
>> do
>> {
>> IFG1 &= ~OFIFG;
>> for(i = 255; i > 0; i--) __asm__ __volatile__("; loop");
>> }
>> while ((OFIFG & IFG1) != 0);
>> BCSCTL2 = 0x88;
>>
>> //INITIALIZE serial port 0
>> UCTL0 = CHAR | SWRST; // 8 bit chars - leave in reset mode
>> UTCTL0 = 0x20; // uclk = smclk
>> UBR10 = 0x01; // 3.6864MHz/9600bps = 384 = 0x180
>> UBR00 = 0x80;
>> UMCTL0 = 0x00;
>> ME1 |= UTXE0; // Enable Tx0
>> UCTL0 = CHAR; // 8 bit chars - take out of reset
>>
>> IE1 |= UTXIE0; //enable Tx0 interrupt
>>
>> eint();
>> }
>>
>>
>>
>>
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