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CCS/msp430f6435: msp430f6435 clock configuration for URAT

Suraj Jagtap
Intellectual 305 points
Part Number: MSP430F6435

Tool/software: Code Composer Studio

Hi I am trying to use UART on msp430f6435 but I am not getting proper clock configuration.

I have used ti resource UART reference code but it is not working the way it is assumed to be.

Ti resource website

"dev.ti.com/.../

  • 0
    Intellectual 305 points

    Part Number: msp430f6435

    Tool/software: Code Composer Studio

    MSP430f6435 uart configuration

    P2.4 ==>Tx

    P2.5==>Rx

    7 6 5 4 3 2 1 0  (Port 2 bits)

    0 0 1 1 0 0 0 0  ==>0x30

    P2SEL |= 0x30;                            // Assign P2.4 to UCA0TXD and...

    P2DIR |= 0x30;                            // P2.5 to UCA0RXD

    is it the correct way to assign port2 as uart  for Tx & Rx ???

  • 0 in reply to Suraj Jagtap
    TI__Guru 51940 points 
    void Port_Mapping(void)
{
  // Disable Interrupts before altering Port Mapping registers
  __disable_interrupt();     
  // Enable Write-access to modify port mapping registers
  PMAPPWD = 0x02D52;                        
  
  #ifdef PORT_MAP_RECFG                    
  // Allow reconfiguration during runtime
  PMAPCTL = PMAPRECFG;                     
  #endif  
  
  P2MAP4 = PM_UCA0TXD;
  P2MAP5 = PM_UCA0RXD;

  // Disable Write-Access to modify port mapping registers
  PMAPPWD = 0;                              
  #ifdef PORT_MAP_EINT
  __enable_interrupt();                     // Re-enable all interrupts
  #endif  
}

    This will set up the secondary functions port mapping.
    Call Port_Mapping() before your P2SEL line.

  • 0 in reply to Nima Eskandari
    Intellectual 305 points
    still not working :(
    Port_Mapping();
    P2SEL |= (BIT4|BIT5); // Assign P2.4 to UCA0TXD and...
    P2DIR = BIT4;

    USCI_A_UART_initParam uart ; //uart init_param struct

    USCI_A_UART_disable(USCI_A0_BASE); //disable uart

    //configure init_param struct

    uart.selectClockSource =UCSSEL__ACLK;
    uart.clockPrescalar = 0x0003;
    uart.firstModReg= 0x00;
    uart.secondModReg = 0x03;
    uart.parity = 0x00; //no parity
    uart.msborLsbFirst = 0x00; //lsbfirst
    uart.numberofStopBits = 0x00; //one stop bit
    uart.uartMode = UCMODE_0; //uart_mode
    uart.overSampling = 0x00; //low freq baudrate generation

    ret = USCI_A_UART_init(USCI_A0_BASE,&msp_uart);

    USCI_A_UART_enable(USCI_A0_BASE);

    USCI_A_UART_enableInterrupt(USCI_A0_BASE,(UCRXIE|UCTXIE));
  • 0 in reply to Suraj Jagtap
    TI__Guru 51940 points
    When you write to the USCI TX Register, do you get any signal on the pin?
  • 0 in reply to Nima Eskandari
    TI__Guru 51940 points
    were you able to solve this issue?

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