//! 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"
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
+ //UCA0CTL0 |= UCMSB ;
- //UCA0BR0 = BAUD0EN; // 115200
+ 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**
-
+ 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;
}
+/* 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
+*/
+
+//! Initialize the MSP430 clock.
void msp430_init_dco() {
- //This REQUIRES that info flash be unmolested.
- //TODO check for that.
+ 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;
+ }
+ }
- BCSCTL1 = CALBC1_16MHZ;
- DCOCTL = CALDCO_16MHZ;
return;
}