//! Set the baud rate.
void setbaud(unsigned char rate){
- //http://mspgcc.sourceforge.net/baudrate.html
+ //Table 15-4, page 481 of 2xx Family Guide
switch(rate){
case 1://9600 baud
-
+ UCA0BR1 = 0x06;
+ UCA0BR0 = 0x82;
break;
case 2://19200 baud
-
+ UCA0BR1 = 0x03;
+ UCA0BR0 = 0x41;
break;
case 3://38400 baud
-
+ UCA0BR1 = 0xa0;
+ UCA0BR0 = 0x01;
break;
case 4://57600 baud
-
+ UCA0BR1 = 0x1d;
+ UCA0BR0 = 0x01;
break;
default:
case 5://115200 baud
-
+ UCA0BR0 = 0x8a;
+ UCA0BR1 = 0x00;
break;
}
}
break;
case 2://19200 baud
-
break;
case 3://38400 baud
}
}
-
-
-//19200
-#define BAUD0EN 0x1b
-#define BAUD1EN 0x00
-
+#define BAUD0EN 0x41
+#define BAUD1EN 0x03
void msp430_init_uart(){
UCA0CTL0 = 0x00;
//UCA0CTL0 |= UCMSB ;
UCA0CTL1 |= UCSSEL_2; // SMCLK
- UCA0BR0 = BAUD0EN; // 115200
- UCA0BR1 = BAUD1EN;
+
+ //UCA0BR0 = BAUD0EN; // 115200
+ //UCA0BR1 = BAUD1EN;
+ setbaud(5);//default baud, 115200
+
UCA0MCTL = 0; // Modulation UCBRSx = 5
UCA0CTL1 &= ~UCSWRST; // **Initialize USCI state machine**
}
-//external resistor
-#define DCOR 1
+//! Initialize the MSP430 clock.
void msp430_init_dco() {
- BCSCTL1 = CALBC1_16MHZ;
- DCOCTL = CALDCO_16MHZ;
+ //LED lights when init_dco begins,
+ //then dims when successful.
+ PLEDOUT|=PLEDPIN;
+
+ if(CALBC1_16MHZ!=0xFF && CALDCO_16MHZ!=0xFF){
+ //Info is intact, use it.
+ BCSCTL1 = CALBC1_16MHZ;
+ DCOCTL = CALDCO_16MHZ;
+ }else{
+ //Info is missing, guess at a good value.
+ switch(*((int*)0xff0)){
+ default:
+ case 0x6ff2: //f26f, the MSP430F2618
+ BCSCTL1 = 0x8f; //CALBC1_16MHZ at 0x10f9
+ DCOCTL = 0x7f; //CALDCO_16MHZ at 0x10f8
+ break;
+ }
+ }
+
+ //Hopefully by here the clock is meaningful.
+ PLEDOUT&=~PLEDPIN;
return;
}