//! 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 <io.h>
#include <iomacros.h>
-
//! Receive a byte.
unsigned char serial_rx(){
char c;
//! 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;
}
}
//! 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;
- }
}
-
-//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;
}
+/* Info Flash Values
+CALDCO_16MHZ 0xdc CALBC1_16MHZ 0x8e 2274-000.txt
+CALDCO_16MHZ 0x74 CALBC1_16MHZ 0x8f 2618-000.txt
+CALDCO_16MHZ 0x6c CALBC1_16MHZ 0x8f 2618-001.txt
+CALDCO_16MHZ 0x97 CALBC1_16MHZ 0x8f 2618-002.txt
+CALDCO_16MHZ 0x6c CALBC1_16MHZ 0x8f 2618-003.txt
+CALDCO_16MHZ 0x95 CALBC1_16MHZ 0x8f 2618-004.txt
+CALDCO_16MHZ 0xcc CALBC1_16MHZ 0x8e 2618-005.txt
+CALDCO_16MHZ 0x87 CALBC1_16MHZ 0x8f 2618-006.txt
+CALDCO_16MHZ 0x96 CALBC1_16MHZ 0x8f 2619-001.txt
+*/
+
+//! Initialization is correct.
+void msp430_init_dco_done(){
+ char *choice=(char *) 0x200; //First word of RAM.
+ choice[0]--;
+}
+//! 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
+
+ if(CALBC1_16MHZ!=0xFF){
+ //Info is intact, use it.
+ BCSCTL1 = CALBC1_16MHZ;
+ DCOCTL = CALDCO_16MHZ;
+ }else{
+ /*
+ Info is missing, guess at a good value.
+
+ For now, the choice doesn't jump backward after a successful
+ connection. For that reason, keep this list as small as possible.
+ Future revisions will subtract one from choice[0] after a successful
+ connection, keeping choice[1] as the target.
+ */
+
+ #define CHOICES 4
+ DCOCTL = 0x00; //clear DCO
+ switch(choice[0]++%CHOICES){
+ default:
+ case 0:
+ BCSCTL1 = 0x8f; //CALBC1_16MHZ at 0x10f9
+ DCOCTL = 0x83; //CALDCO_16MHZ at 0x10f8
+ break;
+ case 1:
+ BCSCTL1 = 0x8f;
+ DCOCTL = 0x95;
+ break;
+ case 2:
+ BCSCTL1 = 0x8f;
+ DCOCTL = 0x6c;
+ break;
+ case 3:
+ BCSCTL1 = 0x8e;
+ DCOCTL = 0xdc;
+ break;
+ }
+ }
+
+ //Minor delay.
+ while(i--);
return;
}