//! MSP430F2618 clock and I/O definitions
-// Ought to be portable to other 2xx chips.
-// 2274 looks particularly appealing.
+// Included by other 2xx ports, such as the 2274.
#include "platform.h"
//! Receive a byte.
unsigned char serial1_rx(){
//TODO
+ return 00;
}
-
//! Transmit a byte.
void serial_tx(unsigned char x){
- while ((IFG2 & UCA0TXIFG) == 0); //loop unti lbuffer is free
+ while ((IFG2 & UCA0TXIFG) == 0); //loop until buffer is free
+ UCA0TXBUF = x; /* send the character */
+ while(!(IFG2 & UCA0TXIFG));
+}
+//! Transmit a byte.
+void serial_tx_old(unsigned char x){
+ while ((IFG2 & UCA0TXIFG) == 0); //loop until buffer is free
UCA0TXBUF = x; /* send the character */
while(!(IFG2 & UCA0TXIFG));
}
//! Transmit a byte on the second UART.
void serial1_tx(unsigned char x){
+
}
//! 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
}
}
-
-//host.h says 0x2B for DCO=4.9MHZ
-//Divide by four for accuracy.
-
-//19200
#define BAUD0EN 0x41
#define BAUD1EN 0x03
-
void msp430_init_uart(){
+
// Serial on P3.4, P3.5
P3SEL |= BIT4 + BIT5;
P3DIR |= BIT4;
-
+
//UCA0CTL1 |= UCSWRST; /* disable 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**
-
-}
+ //Leave this commented!
+ //Interrupt is handled by target code, not by bootloader.
+ //IE2 |= UCA0RXIE;
+}
+
+//! Initialize the MSP430 clock.
void msp430_init_dco() {
- BCSCTL1 = CALBC1_16MHZ;
- DCOCTL = CALDCO_16MHZ;
+ if(CALBC1_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
+ DCOCTL = 0x00;
+ #ifndef DCOVAL
+ #define DCOVAL 0x8f
+ #endif
+ BCSCTL1 = DCOVAL; //CALBC1_16MHZ at 0x10f9
+ /** Observed DCOCTL values:
+ 2618: 7f, 97
+ */
+ DCOCTL = 0x83; //CALDCO_16MHZ at 0x10f8
+ break;
+ }
+ }
return;
}