Fix video console newline and carriage return handling
Lines of the lenght CONSOLE_COLS or greater than CONSOLE_COLS
are not displayed correctly. This is an attempt to fix
this issue. Also add carriage return handling.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Rodolfo Giometti <giometti@linux.it>
diff --git a/drivers/video/cfb_console.c b/drivers/video/cfb_console.c
index 82cc0c7..6262d02 100644
--- a/drivers/video/cfb_console.c
+++ b/drivers/video/cfb_console.c
@@ -647,7 +647,14 @@
static void console_newline (void)
{
- CURSOR_OFF console_row++;
+ /* Check if last character in the line was just drawn. If so, cursor was
+ overwriten and need not to be cleared. Cursor clearing without this
+ check causes overwriting the 1st character of the line if line lenght
+ is >= CONSOLE_COLS
+ */
+ if (console_col < CONSOLE_COLS)
+ CURSOR_OFF
+ console_row++;
console_col = 0;
/* Check if we need to scroll the terminal */
@@ -660,16 +667,26 @@
}
}
+static void console_cr (void)
+{
+ CURSOR_OFF console_col = 0;
+}
+
/*****************************************************************************/
void video_putc (const char c)
{
+ static int nl = 1;
+
switch (c) {
- case 13: /* ignore */
+ case 13: /* back to first column */
+ console_cr ();
break;
case '\n': /* next line */
- console_newline ();
+ if (console_col || (!console_col && nl))
+ console_newline ();
+ nl = 1;
break;
case 9: /* tab 8 */
@@ -691,8 +708,10 @@
console_col++;
/* check for newline */
- if (console_col >= CONSOLE_COLS)
+ if (console_col >= CONSOLE_COLS) {
console_newline ();
+ nl = 0;
+ }
}
CURSOR_SET}