return c;
}
+
+//! Receive a byte.
+unsigned char serial1_rx(){
+ char c;
+
+ while(!(IFG2&URXIFG1));//wait for a byte
+ c = RXBUF1;
+ IFG2&=~URXIFG1;
+ U1TCTL &= ~URXSE;
+
+ return c;
+}
+
+
//! Transmit a byte.
void serial_tx(unsigned char x){
while ((IFG1 & UTXIFG0) == 0); //loop until buffer is free
TXBUF0 = x;
}
+//! Transmit a byte on the second UART.
+void serial1_tx(unsigned char x){
+ while ((IFG2 & UTXIFG1) == 0); //loop until buffer is free
+ TXBUF1 = x;
+}
-void msp430_init_uart(){
+//! Set the baud rate.
+void setbaud(unsigned char rate){
- /* RS232 */
+ //http://mspgcc.sourceforge.net/baudrate.html
+ switch(rate){
+ case 1://9600 baud
+ UBR00=0x7F; UBR10=0x01; UMCTL0=0x5B; /* uart0 3683400Hz 9599bps */
+ break;
+ case 2://19200 baud
+ UBR00=0xBF; UBR10=0x00; UMCTL0=0xF7; /* uart0 3683400Hz 19194bps */
+ break;
+ case 3://38400 baud
+ UBR00=0x5F; UBR10=0x00; UMCTL0=0xBF; /* uart0 3683400Hz 38408bps */
+ break;
+ case 4://57600 baud
+ UBR00=0x40; UBR10=0x00; UMCTL0=0x00; /* uart0 3683400Hz 57553bps */
+ break;
+ default:
+ case 5://115200 baud
+ UBR00=0x20; UBR10=0x00; UMCTL0=0x00; /* uart0 3683400Hz 115106bps */
+ 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
+ UBR01=0x7F; UBR11=0x01; UMCTL1=0x5B; /* uart0 3683400Hz 9599bps */
+ break;
+ case 2://19200 baud
+ UBR01=0xBF; UBR11=0x00; UMCTL1=0xF7; /* uart0 3683400Hz 19194bps */
+ break;
+ case 3://38400 baud
+ UBR01=0x5F; UBR11=0x00; UMCTL1=0xBF; /* uart0 3683400Hz 38408bps */
+ break;
+ case 4://57600 baud
+ UBR01=0x40; UBR11=0x00; UMCTL1=0x00; /* uart0 3683400Hz 57553bps */
+ break;
+ default:
+ case 5://115200 baud
+ UBR01=0x20; UBR11=0x00; UMCTL1=0x00; /* uart0 3683400Hz 115106bps */
+ break;
+ }
+}
+
+
+void msp430_init_uart(){
P3SEL |= BIT4|BIT5; // P3.4,5 = USART0 TXD/RXD
P3DIR |= BIT4;
-
UCTL0 = SWRST | CHAR; /* 8-bit character, UART mode */
-
-
UTCTL0 = SSEL1; /* UCLK = MCLK */
-
- //http://mspgcc.sourceforge.net/baudrate.html
- //9600 baud
- UBR00=0x00; UBR10=0x01; UMCTL0=0x00;
+ setbaud(0);
+
+ //Necessary for bit-banging, switch to hardware for performance.
ME1 &= ~USPIE0; /* USART1 SPI module disable */
ME1 |= (UTXE0 | URXE0); /* Enable USART1 TXD/RXD */
/* XXX Clear pending interrupts before enable!!! */
U0TCTL |= URXSE;
-
+
+
//IE1 |= URXIE1; /* Enable USART1 RX interrupt */
}
void msp430_init_dco() {
/* This code taken from the FU Berlin sources and reformatted. */
-#define MSP430_CPU_SPEED 2457600UL
+ //
+
+//Works well.
+//#define MSP430_CPU_SPEED 2457600UL
+
+//Too fast for internal resistor.
+//#define MSP430_CPU_SPEED 4915200UL
+
+//Max speed.
+//#deefine MSP430_CPU_SPEED 4500000UL
+
+//baud rate speed
+#define MSP430_CPU_SPEED 3683400UL
#define DELTA ((MSP430_CPU_SPEED) / (32768 / 8))
unsigned int compare, oldcapture = 0;
unsigned int i;
WDTCTL = WDTPW + WDTHOLD; //stop WDT
+
+
+ DCOCTL=0xF0;
+ //a4
+ //1100
- BCSCTL1 = 0xa4; /* ACLK is devided by 4. RSEL=6 no division for MCLK
- and SSMCLK. XT2 is off. */
-
+ /* ACLK is devided by 4. RSEL=6 no division for MCLK
+ and SSMCLK. XT2 is off. */
+ //BCSCTL1 = 0xa8;
+
BCSCTL2 = 0x00; /* Init FLL to desired frequency using the 32762Hz
crystal DCO frquenzy = 2,4576 MHz */
-
+
+ P1OUT|=1;
+
BCSCTL1 |= DIVA1 + DIVA0; /* ACLK = LFXT1CLK/8 */
for(i = 0xffff; i > 0; i--) { /* Delay for XTAL to settle */
asm("nop");
/* -> Select next higher RSEL */
}
}
-
+
CCTL2 = 0; /* Stop CCR2 function */
TACTL = 0; /* Stop Timer_A */
BCSCTL1 &= ~(DIVA1 + DIVA0); /* remove /8 divisor from ACLK again */
+
+ P1OUT=0;
}