Hi all,
I am trying to get the UART mode working. My setup is:
- MSP-TS430PM64 (with the optional 32 kHz external crystal oscillator
installed)
- MPS-FET430UIF Debug-Interface
- Code Composer Esentials 3
- a level converter for RS232
(
http://www.tildesign.nl/rs232_ttl_converter-20107101P2N))
- and a one-to-one serial cable
I am using the sample code from TI.
However, I do get stuck in the do{}while loop of clearing
OSCFault flag.
Does anyone know why this is??
Further more, commenting out the do{}while the transmission of data
also gets stuck after the first character is set in the transmit
register. (I am using hyperterminal to connect to my serial port)
#include <msp430x16x.h>
int main(void)
{
volatile unsigned int i;
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
P3SEL |= 0x30; // P3.4,5 = USART0 TXD/RXD
BCSCTL1 |= XTS; // ACLK = LFXT1 = HF XTAL
do
{
IFG1 &= ~OFIFG; // Clear OSCFault flag
for (i = 0xFF; i > 0; i--); // Time for flag to set
}
while ((IFG1 & OFIFG)); // OSCFault flag still set?
UCTL0 |= SWRST; // USART logic held in reset state
BCSCTL2 |= SELM_3; // MCLK = LFXT1(safe)
ME1 |= UTXE0; // Enabled USART0 TXD (2^7 = 128 = 0x80)
UCTL0 |= CHAR; // 8-bit character
UTCTL0 |= SSEL0; // UCLK = ACLK
UBR00 = 0x45; // 8MHz 115200
UBR10 = 0x00; // 8MHz 115200
UMCTL0 = 0x00; // 8MHz 115200 modulation
UCTL0 &= ~SWRST; // Initalize USART state machine
while(1)
{
while (!(IFG1 & UTXIFG0)); // USART0 TX buffer ready?
TXBUF0 = 0x41;
}
return 0;
}
