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Fix several problems with data escape handling in hd44780-serial:

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1. A bogus address calculation was done (spotted by G. Smith).
2. The displayID was added to the data escape character even if the connection
type does not support multiple displays (spotted by G. Smith).
3. When calculation if data escape is necessary, the character 0xff could not
be escaped. Changed an updates all connection types (M. Dolze).
This commit is contained in:
mmdolze
2014-02-10 06:48:44 +00:00
parent dca261e98a
commit a8d9504a3c
3 changed files with 7 additions and 5 deletions
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server/drivers/hd44780-serial.c
+3 -2
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@@ -280,9 +280,10 @@ serial_HD44780_senddata(PrivateData *p, unsigned char displayID, unsigned char f
/* Do we need a DATA indicator byte? */
if ((SERIAL_IF.data_escape != '\0') &&
(((ch >= SERIAL_IF.data_escape_min) &&
(ch < SERIAL_IF.data_escape_max)) ||
(ch <= SERIAL_IF.data_escape_max)) ||
(SERIAL_IF.multiple_displays && displayID != lastdisplayID))) {
write(p->fd, &SERIAL_IF.data_escape + displayID, 1);
unsigned char esc_ch = SERIAL_IF.data_escape + (SERIAL_IF.multiple_displays) ? displayID : 0;
write(p->fd, &esc_ch, 1);
}
write(p->fd, &ch, 1);
}