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Original question:

Compiler/MSP430F6736A: MSP430F6736A

Compiler/MSP430F6736A: MSP430F6736A

satish sharma13
Intellectual 470 points

Part Number: MSP430F6736A

Tool/software: TI C/C++ Compiler

SIR,

I want to map my P2.6 AND P2.7 AS uart ,

related code is attatched below ,

PMAPKEYID = 0x2D52;

PMAPCTL |= PMAPRECFG;

P2MAP7 = PM_UCA0RXD;
 P2MAP6 = PM_UCA0TXD;

PMAPKEYID=0;

my port mapping code is not working 

i didn't get my interrupt of uart 

  • 0
    Guru 34973 points

    Post all code. I guess that selection bit is missing. My working UART / I2C mapping...

    		#if defined(I2C1) || defined(I2C2) || defined(UART1) || defined(UART2)
		mov.w #02D52h, &PMAPPWD				; Enable Write-access to modify port mapping
		mov.w #PMAPRECFG, &PMAPCTL			; Allow reconfiguration during runtime
		#endif

		#ifdef I2C1 
		mov.b #PM_UCB0SCL, &P4MAP4
		mov.b #PM_UCB0SDA, &P4MAP5
		#endif
		
		#ifdef I2C2
		mov.b #PM_UCB1SCL, &P4MAP6
		mov.b #PM_UCB1SDA, &P4MAP7
		#endif

		#ifdef UART1
		mov.b #PM_UCA0RXD, &P4MAP4
		mov.b #PM_UCA0TXD, &P4MAP5
		#endif

		#ifdef UART2 
		mov.b #PM_UCA1RXD, &P4MAP6
		mov.b #PM_UCA1TXD, &P4MAP7
		#endif

		#if defined(I2C1) || defined(I2C2) || defined(UART1) || defined(UART2)
		mov.w #0, &PMAPPWD				; Disable Write-Access to modify port mapping
		#endif

		#if defined(I2C1) || defined(I2C2) || defined(UART1) || defined(UART2) 
		mov.b #0F0h, &P4SEL
		#else
		mov.b #000h, &P4SEL
		#endif

  • 0 in reply to zrno soli
    Intellectual 470 points
    Sir,
    this is my whole code for mapping which i am using ,

    PMAPKEYID = 0x2D52;

    PMAPCTL |= PMAPRECFG;

    P2MAP7 = PM_UCA0RXD;
    P2MAP6 = PM_UCA0TXD;

    PMAPKEYID=0;


    P2SEL |= (BIT6+BIT7);
    P2DIR &=~ BIT7;
    P2DIR |= BIT6;
  • 0 in reply to satish sharma13
    TI__Guru 56685 points
    Hello Satish,

    In general, it looks like your PMAP setup looks correct, although since this is UART, the PxDIR bits are a don't care. I would say this may be more on the UART setup side of things. I would recommend looking at the following app note for help in debugging the UART.

    http://www.ti.com/lit/slaa734

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