X-Git-Url: http://git.rot13.org/?p=goodfet;a=blobdiff_plain;f=firmware%2Flib%2Fmsp430x2618.c;h=6d49366d3443aa290951d38186bab575f349d3a5;hp=b25225d11e60ca3b1f11db250f0fc76588f318cd;hb=23875462d82ae4a5b55c4e966e23d5196657378c;hpb=7f43ff80b47ffc85c8078d962011024979ee6e20

diff --git a/firmware/lib/msp430x2618.c b/firmware/lib/msp430x2618.c
index b25225d..6d49366 100644
--- a/firmware/lib/msp430x2618.c
+++ b/firmware/lib/msp430x2618.c
@@ -1,7 +1,6 @@
 //! 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"
 
@@ -103,37 +102,46 @@ void setbaud1(unsigned char rate){
 
 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() {
-  //LED lights when init_dco begins,
-  //then dims when successful.
-  PLEDOUT|=PLEDPIN;
-  
-  if(CALBC1_16MHZ!=0xFF && CALDCO_16MHZ!=0xFF){
+    P8SEL = 0; // disable XT2 on P8.7/8
+  if(CALBC1_16MHZ!=0xFF){
     //Info is intact, use it.
     BCSCTL1 = CALBC1_16MHZ;
     DCOCTL = CALDCO_16MHZ;
@@ -142,14 +150,19 @@ void msp430_init_dco() {
     switch(*((int*)0xff0)){
     default:
     case 0x6ff2:        //f26f, the MSP430F2618
-      BCSCTL1 = 0x8f;   //CALBC1_16MHZ at 0x10f9
-      DCOCTL = 0x7f;    //CALDCO_16MHZ at 0x10f8
+      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;
     }
   }
   
-  //Hopefully by here the clock is meaningful.
-  PLEDOUT&=~PLEDPIN;
   return;
 }