diff options
Diffstat (limited to '')
| -rw-r--r-- | HD44780.c | 24 |
1 files changed, 14 insertions, 10 deletions
@@ -1,4 +1,4 @@ -/* $Id: HD44780.c,v 1.19 2001/03/15 15:49:22 ltoetsch Exp $ +/* $Id: HD44780.c,v 1.20 2001/09/09 12:26:03 reinelt Exp $ * * driver for display modules based on the HD44780 chip * @@ -20,6 +20,9 @@ * * * $Log: HD44780.c,v $ + * Revision 1.20 2001/09/09 12:26:03 reinelt + * GPO bug: INIT is _not_ inverted + * * Revision 1.19 2001/03/15 15:49:22 ltoetsch * fixed compile HD44780.c, cosmetics * @@ -199,15 +202,15 @@ static SEGMENT Segment[128] = {{ len1:0, len2:0, type:255, used:0, ascii:32 { len1:255, len2:255, type:255, used:0, ascii:255 }}; #ifdef WITH_PPDEV -static void HD_toggle (int bit) +static void HD_toggle (int bit, int inv) { struct ppdev_frob_struct frob; frob.mask=bit; - frob.val=0; // rise (inverted!) + frob.val=inv?0:bit; // rise ioctl (PPfd, PPFCONTROL, &frob); udelay(1); - frob.val=bit; // lower (inverted!) + frob.val=inv?bit:0; // lower ioctl (PPfd, PPFCONTROL, &frob); } #endif @@ -228,7 +231,7 @@ static void HD_command (unsigned char cmd, int delay) ioctl(PPfd, PPWDATA, &cmd); // send command - HD_toggle(PARPORT_CONTROL_STROBE); + HD_toggle(PARPORT_CONTROL_STROBE, 1); // wait udelay(delay); @@ -266,7 +269,7 @@ static void HD_write (char *string, int len, int delay) udelay(1); // send command - HD_toggle(PARPORT_CONTROL_STROBE); + HD_toggle(PARPORT_CONTROL_STROBE, 1); // wait udelay(delay); @@ -293,14 +296,15 @@ static void HD_setGPO (int bits) #ifdef WITH_PPDEV - if (PPdev) { + if (PPdev) { + // put data on DB1..DB8 ioctl(PPfd, PPWDATA, &bits); - - // toggle INIT - HD_toggle(PARPORT_CONTROL_INIT); + // toggle INIT + HD_toggle(PARPORT_CONTROL_INIT, 0); + } else #endif |