Update to add support for MSP430-GCC 4.6 which moved things around;

[goodfet] / firmware / lib / msp430f2618.c

diff --git a/firmware/lib/msp430f2618.c b/firmware/lib/msp430f2618.c
new file mode 100644 (file)
index 0000000..408e3ee
--- /dev/null
+++ b/firmware/lib/msp430f2618.c
@@ -0,0 +1,169 @@
+//! MSP430F2618 clock and I/O definitions
+
+// Included by other 2xx ports, such as the 2274.
+
+#include "platform.h"
+
+#include "dco_calib.h"
+#ifdef __MSPGCC__
+#include <msp430.h>
+#else
+#include <signal.h>
+#include <io.h>
+#include <iomacros.h>
+#endif
+
+
+//! Receive a byte.
+unsigned char serial0_rx(){
+  char c;
+
+  while(!(IFG2&UCA0RXIFG));//wait for a byte
+  c = UCA0RXBUF;
+  IFG2&=~UCA0RXIFG;
+
+  //UCA0CTL1 &= ~UCA0RXSE;
+  return c;
+}
+
+//! Receive a byte.
+unsigned char serial1_rx(){
+  //TODO
+  return 00;
+}
+
+//! Transmit a byte.
+void serial0_tx(unsigned char x){
+  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 setbaud0(unsigned char rate){
+
+  //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){
+
+}
+
+#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;
+  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;
+}
+
+
+//! 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() {
+  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
+
+
+  #ifdef STATICDCO
+  BCSCTL1 = (STATICDCO>>8);
+  DCOCTL  = (STATICDCO&0xFF);
+  #else
+  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;
+  }
+  #endif
+
+  //Minor delay.
+  while(i--);
+
+
+
+  return;
+}
+