//! 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"
+#include "dco_calib.h"
+
#include <signal.h>
#include <io.h>
#include <iomacros.h>
-
//! Receive a byte.
-unsigned char serial_rx(){
+unsigned char serial0_rx(){
char c;
while(!(IFG2&UCA0RXIFG));//wait for a byte
}
//! Transmit a byte.
-void serial_tx(unsigned char x){
+void serial0_tx(unsigned char x){
while ((IFG2 & UCA0TXIFG) == 0); //loop until buffer is free
UCA0TXBUF = x; /* send the character */
while(!(IFG2 & UCA0TXIFG));
}
//! Set the baud rate.
-void setbaud(unsigned char rate){
+void setbaud0(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;
}
}
//! Set the baud rate of the second uart.
void setbaud1(unsigned char rate){
- //http://mspgcc.sourceforge.net/baudrate.html
- switch(rate){
- case 1://9600 baud
-
- break;
- case 2://19200 baud
-
- break;
- case 3://38400 baud
-
- break;
- case 4://57600 baud
-
- break;
- default:
- case 5://115200 baud
-
- break;
- }
}
-
-
-//19200
-#define BAUD0EN 0x1b
-#define BAUD1EN 0x00
-
+#define BAUD0EN 0x41
+#define BAUD1EN 0x03
void msp430_init_uart(){
-
- // Serial on P3.4, P3.5
+
+ // Serial on P3.4, P3.5
P3SEL |= BIT4 + BIT5;
P3DIR |= BIT4;
-
- //UCA0CTL1 |= UCSWRST; /* disable UART */
-
+
+ //UCA0CTL1 |= UCSWRST; /* disable UART */
+
UCA0CTL0 = 0x00;
- //UCA0CTL0 |= UCMSB ;
- UCA0CTL1 |= UCSSEL_2; // SMCLK
- UCA0BR0 = BAUD0EN; // 115200
- UCA0BR1 = BAUD1EN;
- UCA0MCTL = 0; // Modulation UCBRSx = 5
- UCA0CTL1 &= ~UCSWRST; // **Initialize USCI state machine**
-
+ //UCA0CTL0 |= UCMSB ;
+
+ UCA0CTL1 |= UCSSEL_2; // SMCLK
+
+ //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;
+}
- //Leave this commented!
- //Interrupt is handled by target code, not by bootloader.
- //IE2 |= UCA0RXIE;
+//! Initialization is correct.
+void msp430_init_dco_done(){
+ char *choice=(char *) 0x200; //First word of RAM.
+ choice[0]--;
}
-//external resistor
-#define DCOR 1
+//! Initialize the MSP430 clock.
void msp430_init_dco() {
- BCSCTL1 = CALBC1_16MHZ;
- DCOCTL = CALDCO_16MHZ;
+ int i=1000;
+ char *choice=(char *) 0x200; //First word of RAM.
+
+ #ifdef __MSP430_HAS_PORT8__
+ P8SEL = 0; // disable XT2 on P8.7/8
+ #endif
+
+ //Set P2.6 mode for MSP430F2274
+ #ifndef __MSP430_HAS_PORT5__
+ P2SEL = 0; //disable XIN on 2274
+ #endif
+
+
+ if(CALBC1_16MHZ!=0xFF){
+ //Info is intact, use it.
+ BCSCTL1 = CALBC1_16MHZ;
+ DCOCTL = CALDCO_16MHZ;
+ }else{
+ /*
+ Info is missing, guess at a good value.
+
+ A list of correct calibrations in included as dco_calib.c,
+ generated by script.
+ */
+ DCOCTL = 0x00; //clear DCO
+
+ BCSCTL1 = dco_calibrations[2*choice[0]+1];
+ DCOCTL = dco_calibrations[2*choice[0]];
+ choice[0]++;
+ choice[0]%=dco_calibrations_count;
+ }
+
+ //Minor delay.
+ while(i--);
+
+
+
return;
}