Help! Heart rate board (MSP430fg439) can not be powered on!!

Re: Help! Heart rate board (MSP430fg439) can not be powered

Im trying to preset a value(int) in the program. Then later i can replace the value by heart rate reading. I chose P2.4 to be the output pin.

The board is workable and it is fine with original programming. After modifying the progrmming, I compiled and maked the files. It was successful. No error and no warning.

Then i connected the board to the power supply (3 volts). But It was not powered on.



Here is how i modified (I only show the added parts):

void main(void)

{


IE1 |= UTXIE0; // Enable USART0 TX interrupt

P2DIR |= 0x10; // P2.4 output direction


}

void Init(void)

{


// Initialize and enable UART (I dont touch this part)

P2SEL|=BIT4; // P2.4 = TXD

UCTL0 |= SWRST; // UART SWRST = 1

ME1 |= UTXE0; // Enable UART0 TXD

UCTL0 |= CHAR; // 8-bit char, SWRST=1

UTCTL0 |= SSEL1; // UCLK = SMCLK

UBR00 = 18; // 115200 from 2.097152MHz

UBR10 = 0;

UMCTL0 = 0x2c; // Modulation = 0.2044

UCTL0 &= ~SWRST; // UART SWRST = 0, enable UART



}

#pragma vector=usart0rx_vector

_interrupt void usart0_tx(void)

{

while (!(IFG1 & UTXIFG0)); // USART0 TX buffer ready?

TXBUF0 = 15;

}

Added after 1 minutes:

Anyone can help??? TKs a lot!!!!