X-Git-Url: http://git.rot13.org/?p=goodfet;a=blobdiff_plain;f=firmware%2Flib%2Fmsp430x2618.c;h=b25225d11e60ca3b1f11db250f0fc76588f318cd;hp=02ee1c010588a3eb8930816d4e06e0416518aa75;hb=9fff819ee3088834ef10c050bcdc0bc5f93dcd2a;hpb=d817685970c7d0601be3434bed24f835dccbe234

diff --git a/firmware/lib/msp430x2618.c b/firmware/lib/msp430x2618.c
index 02ee1c0..b25225d 100644
--- a/firmware/lib/msp430x2618.c
+++ b/firmware/lib/msp430x2618.c
@@ -25,40 +25,52 @@ unsigned char serial_rx(){
 //! 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;
   }
 }
@@ -72,7 +84,6 @@ void setbaud1(unsigned char rate){
     
     break;
   case 2://19200 baud
-    
     break;
   case 3://38400 baud
     
@@ -87,37 +98,58 @@ void setbaud1(unsigned char rate){
   }
 }
 
-
-//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
+
+  // 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;         
+
+}
+
+//! Initialize the MSP430 clock.
 void msp430_init_dco() {
-  BCSCTL1 = CALBC1_16MHZ;
-  DCOCTL = CALDCO_16MHZ;
+  //LED lights when init_dco begins,
+  //then dims when successful.
+  PLEDOUT|=PLEDPIN;
+  
+  if(CALBC1_16MHZ!=0xFF && CALDCO_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
+      BCSCTL1 = 0x8f;   //CALBC1_16MHZ at 0x10f9
+      DCOCTL = 0x7f;    //CALDCO_16MHZ at 0x10f8
+      break;
+    }
+  }
   
+  //Hopefully by here the clock is meaningful.
+  PLEDOUT&=~PLEDPIN;
   return;
 }