from bbb port

device/tty/ttyhandle_out.c

@@ -40,8 +40,9 @@ void	ttyhandle_out(
 	/* Initialize uspace to the available space in the Tx FIFO */
 
 	//uspace = UART_FIFO_SIZE - csrptr->txfifo_lvl;
-	uspace = UART_FIFO_SIZE;
 
+	/* avr specific: just one byte of fifo so far */
+	uspace = UART_FIFO_SIZE;
 	
 	/* While onboard FIFO is not full and the echo queue is	*/
 	/*   nonempty, xmit chars from the echo queue		*/

include/spi.h

@@ -1,5 +1,8 @@
 /* spi.h - SPI definitions */
 
+/* avr : this port does not use spi yet */
+/* values below for another platform-arch */
+
 struct	spi_csreg {
 	volatile uint32 cr1;		
 	volatile uint32 cr2;		

include/stdio.h

@@ -1,5 +1,7 @@
 /* stdio.h - definintions and constants for standard I/O functions */
 
+/* avr specific values. Original saved under orig/ folder */
+
 
 /* Prototypes for formatted input functions */
 
@@ -19,9 +21,7 @@ extern	int32	fscanf(int32, char *, int32);
 
 /* Prototypes for formatted output functions */
 
-// RAFA extern	int32	fprintf(int, char *, ...);
 extern	int	fprintf(int, char *, ...);
-// RAFA extern	int32	printf(const char *, ...);
 extern	int	printf(const char *, ...);
 extern	int32	sprintf(char *, char *, ...);
 
@@ -32,7 +32,5 @@ extern	int32	fgetc(int);
 extern	char	*fgets(char *, int32, int32);
 extern	int32	fputc(int32, int32);
 extern	int32	fputs(char *, int32);
-// RAFA extern	int32	putchar(int32 c);
 extern	int	putchar(int c);
-// RAFA extern	int32	getchar(void);
 extern	int	getchar(void);

include/tty.h

@@ -1,9 +1,9 @@
 /* tty.h */
 
-// RAFA #define	TY_OBMINSP	20		/* Min space in buffer before	*/
+/* avr specific values. Original saved under orig/ folder */
+
 #define	TY_OBMINSP	1		/* Min space in buffer before	*/
 					/*   processes awakened to write*/
-// RAFA #define	TY_EBUFLEN	20		/* Size of echo queue		*/
 #define	TY_EBUFLEN	1		/* Size of echo queue		*/
 
 /* Size constants */
@@ -12,11 +12,9 @@
 #define	Ntty		1		/* Number of serial tty lines	*/
 #endif
 #ifndef	TY_IBUFLEN
-// RAFA #define	TY_IBUFLEN	128		/* Num. chars in input queue	*/
 #define	TY_IBUFLEN	32		/* Num. chars in input queue	*/
 #endif
 #ifndef	TY_OBUFLEN
-// RAFA #define	TY_OBUFLEN	64		/* Num.	chars in output	queue	*/
 #define	TY_OBUFLEN	8		/* Num.	chars in output	queue	*/
 #endif
 

include/uart.h

@@ -1,45 +1,9 @@
-/* Xinu for STM32
- *
- * Original license applies
- * Modifications for STM32 by Robin Krens
- * Please see LICENSE and AUTHORS 
- * 
- * $LOG$
- * 2019/11/11 - ROBIN KRENS
- * Initial version 
- * 
- * $DESCRIPTION$
- *
- * */
+/* avr specific */
 
-/* Control register */
-#define UART_EN		13 
-#define UART_INTR_RX	5
-#define UART_INTR_TCIE	6
-#define UART_INTR_TX	7
-#define UART_TX_EN 	3
-#define UART_RX_EN 	2
-
-#define PARITY		12
-
-/* Status register */
-#define UART_RXNE	0x20
-#define UART_TC		0x40
-#define UART_TC_TXE	0xC0
-
-#define UART_TEST	6
+/* Not useful so far */
 
 #define UART_FIFO_SIZE	1
-#define UARTBUF 256
-#define ECHO 1
-
-struct uart_csreg {
-	volatile uint32 sr;
-	volatile uint32 dr;
-	volatile uint32 brr;
-	volatile uint32 cr1;
-	volatile uint32 cr2;
-	volatile uint32 cr3;
-	volatile uint32 gtr;
+struct uart_csreg {	/* avr does not use this so far */
+	char c;
 };