My code doesn't seem to be working. Using MSP430F169 trying to get a 1 one I Press 'd' after switching from I2C Back to RS232
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
InitUSART0(); // Initialize Serial UART Port 0
_EINT(); // Enable interrupts
}
// UART0 RX ISR
#pragma vector=USART0RX_VECTOR
__interrupt void usart0_rx (void)
{
int flg_a = 0;
if (RXBUF0 == 'd') // 'u' received?
{
InitI2C();
flg_a = 1;
DeInitI2c();
InitUSART0();
UART_transmit ('1');
}
if (flg_a == 0)
{
UART_transmit (RXBUF0);
}
}
void DeInitI2c(void)
{
U0CTL &= ~(I2C + SYNC); ///// 1) Clear I2C, SYNC, and I2CEN (CLR.B &U0CTL)
U0CTL &= ~I2CEN;
UCTL0 |= SWRST; ///////2) Set SWRST (MOV.B #SWRST,&U0CTL)
}
void InitI2C(void)
{
P3SEL |= 0x0A; // P3.1,P3.3
UCTL0 |= SWRST;
U0CTL |= (I2C + SYNC); // Switch USART0 to I2C mode
U0CTL &= ~I2CEN; // Recommended init procedure - Disable I2C
U0CTL |= I2CEN; // Enable I2C, 7 bit addr,
}
void InitUSART0(void)
{
P3SEL |= 0x30; // P3.4,3.5 = USART0 TXD/RXD
UCTL0 |= SWRST;
ME1 |= UTXE0 + URXE0; // Enabled USART0 TXD/RXD
UCTL0 |= CHAR; // 8-bit character, SWRST=1
UTCTL0 |= SSEL0; // UCLK = ACLK
UBR00 = 0x03; // 9600 from 1Mhz
UBR10 = 0x00; //
UMCTL0 = 0x4A; // Modulation
UCTL0 &= ~SWRST; // Initialize USART state machine
IE1 |= URXIE0 + UTXIE0; // Enable USART0 RX/TX interrupt
IFG1 &= ~UTXIFG0;
}
void UART_transmit (unsigned char Transmit_Data) //UART1 Transmit Subroutine
{
TXBUF0 = Transmit_Data; //send data
}
