added boostc files

boostc/usart.c

@@ -0,0 +1,116 @@
+#include <system.h>
+#include "usart.h"
+#include "util.h"
+
+void usart_init_core(void){
+	// pins
+	trisc.7 = 1;
+	trisc.6 = 0;
+	
+	// baud rate
+	txsta.BRGH = BAUD_BRGH;
+	baudcon.BRG16 = BAUD_BRG16;
+	baudcon.WUE   = 0;
+
+	txsta.SYNC = 0;
+	rcsta.SPEN = 1;
+	
+	// transmitter
+	txsta.TXEN = 1;
+	pie1.TXIE = 0;
+	txsta.TX9 = 0;
+	
+	// reception
+	pie1.RCIE = 0;
+	rcsta.RX9 = 0;
+	rcsta.CREN = 1;
+}
+
+void usart_init(void){
+	// baud rate
+	spbrgh = (BAUD_RATE >> 8) & 0xff;
+	spbrg  = BAUD_RATE & 0xff;
+	
+	usart_init_core();
+}
+
+/*
+The Auto-Baud Rate Detection must receive a 
+byte with the value 55h (ASCII U)
+*/
+void usart_init_auto(void){
+	spbrg  = 0;
+	spbrgh = 0;
+	
+	//baudcon.WUE = 1;
+	baudcon.ABDEN = 1;
+	
+	usart_init_core();
+	
+	while(baudcon.ABDEN == 1){
+		usart_getc();
+	}
+}
+
+void usart_putc(unsigned char data){
+	while(!pir1.TXIF){
+		delay_ms(1);
+	}
+	txreg = data;
+	
+	#ifdef TX_LED
+		TX_LED = 1;
+		delay_us(1);
+		TX_LED = 0;
+	#endif
+}
+
+unsigned char usart_getc(void){
+	while(!pir1.RCIF){
+		delay_ms(1);
+	}
+	#ifdef RX_LED
+		RX_LED = 1;
+		delay_us(1);
+		RX_LED = 0;
+	#endif
+	
+	if (rcsta.OERR){
+		rcsta.CREN = 0;
+		rcsta.CREN = 1;
+	}
+	return rcreg;
+}
+
+void usart_gets(unsigned char *destination){
+	while ((*destination++ = usart_getc()) != 0x0d); // wait until tx register is empty
+		*--destination = 0;
+}
+
+void usart_puts(unsigned char *source){
+	while (*source != 0) // wait until tx register is empty
+		usart_putc(*source++);
+}
+
+void usart_putsln(unsigned char *source){
+	usart_puts(source);
+	usart_put_newline();
+}
+
+void usart_put_newline(){
+	usart_putc(0x0d);
+	usart_putc(0x0a);
+}
+
+void usart_waitfor(unsigned char c){
+	while(usart_getc() != c){}
+}
+
+void usart_put_baoud(){
+	usart_puts("Baud rate: 0x");
+    usart_putc(bin2Hex( (spbrgh>>0x4) & 0x0f ));
+    usart_putc(bin2Hex( spbrgh & 0x0f ));
+	usart_putc(bin2Hex( (spbrg>>0x4) & 0x0f ));
+	usart_putc(bin2Hex( spbrg & 0x0f ));
+	usart_put_newline();
+}