Re: MSP430F5528 - Clock and UART

or get new hands ^^

On Tue, Feb 17, 2015 at 3:02 PM, Onestone [email protected] [msp430] <
[email protected]> wrote:

>
>
> Well typing can be difficult when you only have limited use of your hands.
> I'll try to do better next time.
>
> Al
>
>
>
> On 18/02/2015 8:46 AM, Martin Bruner [email protected] [msp430]
> wrote:
>
>
>
>  I believe you were looking for “frightening” not “fightening".
>
>  From: "msp430@yahoogroups. com" <[email protected]> <
> [email protected]>
> Reply-To: "msp430@yahoogroups. com" <[email protected]> <
> [email protected]>
> Date: Tuesday, February 17, 2015 at 3:07 PM
> To: "msp430@yahoogroups. com" <[email protected]> <
> [email protected]>
> Subject: Re: [msp430] MSP430F5528 - Clock and UART
>
>
>
> Why oh why are you bit banging this when the MSP430 has an extremely
> simple UART in hardware. Are interrupts that fightening?
>
> Al
>
>  On 18/02/2015 2:21 AM, [email protected] [msp430] wrote:
>
>
>
>
>  Hello, I'm trying to communicate with my RF module through UART
> interface. However, I get many errors even with low load. I suspect that
> I have an issue with the way that I configure the clock or the UART.
>
>
>  Basically, for the UART functionality I use
> http://glitovsky.com/blog/?p=300
>
> (I configured the connection as 8N1 at 115200).
>
>
>  The clock configuration below is used with MCLK = 25 MHz ( when I use it
> with MCLK=16 MHz I cannot communicate with the UART module at all ) .
>
>
>   P5SEL |= 0x0C;
>
>   /* Select REF0 for FLL reference. */
>
>  UCSCTL3 &= ~SELREF_7;
>
>  UCSCTL3 |= SELREF_2;
>
>
>   /* Set ACLK to use REF0CLK.
>
>    * Set SMCLK to use the DCO.
>
>   */
>
>   UCSCTL4 &= ~SELA_7 & ~SELS_7 & ~SELM_7;
>
>   UCSCTL4 |= SELA_2 | SELS_4 | SELM_4;
>     /* Initialize FLL. */
>    Init_FLL_Settle(mclk/1000L, mclk/32768);
>
>     XT2_Start(XT2DRIVE_0);
>
>     UCSCTL4 &= ~SELA_7;
>      UCSCTL4 |= SELA_2;
>    UCSCTL8 |= SMCLKREQEN | MCLKREQEN | ACLKREQEN;
>    /* Enable interrupt for TBCCR0. */
>     TBCCTL0 = CCIE;
>
>   /* Number of ticks per millisecond. */
>     clock.aclk = 32768;
>     clock.ticks_per_interrupt = clock.aclk / 1000;
>     TBCCR0 = clock.ticks_per_interrupt;
>
>      /* Use ACLK, set timer to up-count mode, and start timer at zero. */
>     TBCTL = TBSSEL_1 | MC_2 | TBCLR;
>
>     /* Enable interrupts. */
>     __bis_SR_register(GIE);
>
>
>  Thanks,
> Mike
>
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>  
>



-- 
Thomas J. Grajewski