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-rw-r--r--drv_HD44780.c85
1 files changed, 57 insertions, 28 deletions
diff --git a/drv_HD44780.c b/drv_HD44780.c
index 50ab383..fff9f5a 100644
--- a/drv_HD44780.c
+++ b/drv_HD44780.c
@@ -1,4 +1,4 @@
-/* $Id: drv_HD44780.c,v 1.36 2004/09/18 10:57:29 reinelt Exp $
+/* $Id: drv_HD44780.c,v 1.37 2004/09/18 15:58:57 reinelt Exp $
*
* new style driver for HD44780-based displays
*
@@ -29,6 +29,9 @@
*
*
* $Log: drv_HD44780.c,v $
+ * Revision 1.37 2004/09/18 15:58:57 reinelt
+ * even more HD44780 cleanups, hardwiring for LCM-162
+ *
* Revision 1.36 2004/09/18 10:57:29 reinelt
* more parport/i2c cleanups
*
@@ -280,20 +283,21 @@ typedef struct {
#define CAP_PARPORT (1<<0)
#define CAP_I2C (1<<1)
-#define CAP_BRIGHTNESS (1<<2)
-#define CAP_BUSY4BIT (1<<3)
-#define CAP_HD66712 (1<<4)
-#define CAP_LCM162 (1<<5)
+#define CAP_GPO (1<<2)
+#define CAP_BRIGHTNESS (1<<3)
+#define CAP_BUSY4BIT (1<<4)
+#define CAP_HD66712 (1<<5)
+#define CAP_LCM162 (1<<6)
#define BUS_PP CAP_PARPORT
#define BUS_I2C CAP_I2C
static MODEL Models[] = {
- { 0x01, "generic", CAP_PARPORT|CAP_I2C },
- { 0x02, "Noritake", CAP_PARPORT|CAP_I2C|CAP_BRIGHTNESS },
+ { 0x01, "generic", CAP_PARPORT|CAP_I2C|CAP_GPO },
+ { 0x02, "Noritake", CAP_PARPORT|CAP_I2C|CAP_GPO|CAP_BRIGHTNESS },
{ 0x03, "Soekris", CAP_PARPORT|CAP_BUSY4BIT },
- { 0x04, "HD66712", CAP_PARPORT|CAP_I2C|CAP_HD66712 },
+ { 0x04, "HD66712", CAP_PARPORT|CAP_I2C|CAP_GPO|CAP_HD66712 },
{ 0x05, "LCM-162", CAP_PARPORT|CAP_LCM162 },
{ 0xff, "Unknown", 0 }
};
@@ -567,6 +571,12 @@ static int drv_HD_PP_load (const char *section)
error ("%s: bad %s.Bits '%d' from %s, should be '4' or '8'", Name, section, Bits, cfg_source());
return -1;
}
+
+ /* LCM-162 only supports 8-bit-mode */
+ if (Capabilities & CAP_LCM162 && Bits != 8) {
+ error ("%s: Model '%s' does not support %d bit mode!", Name, Models[Model].name, Bits);
+ Bits = 8;
+ }
info ("%s: using %d bit mode", Name, Bits);
if (drv_generic_parport_open(section, Name) != 0) {
@@ -574,18 +584,27 @@ static int drv_HD_PP_load (const char *section)
return -1;
}
- if (Bits==8) {
- if ((SIGNAL_RS = drv_generic_parport_wire_ctrl ("RS", "AUTOFD"))==0xff) return -1;
- if ((SIGNAL_RW = drv_generic_parport_wire_ctrl ("RW", "GND" ))==0xff) return -1;
- if ((SIGNAL_ENABLE = drv_generic_parport_wire_ctrl ("ENABLE", "STROBE"))==0xff) return -1;
- if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_ctrl ("ENABLE2", "GND" ))==0xff) return -1;
- if ((SIGNAL_GPO = drv_generic_parport_wire_ctrl ("GPO", "GND" ))==0xff) return -1;
+ /* the LCM-162 is hardwired */
+ if (Capabilities & CAP_LCM162) {
+ if ((SIGNAL_RS = drv_generic_parport_hardwire_ctrl ("RS", "SELECT"))==0xff) return -1;
+ if ((SIGNAL_RW = drv_generic_parport_hardwire_ctrl ("RW", "INIT" ))==0xff) return -1;
+ if ((SIGNAL_ENABLE = drv_generic_parport_hardwire_ctrl ("ENABLE", "AUTOFD"))==0xff) return -1;
+ if ((SIGNAL_ENABLE2 = drv_generic_parport_hardwire_ctrl ("ENABLE2", "GND" ))==0xff) return -1;
+ if ((SIGNAL_GPO = drv_generic_parport_hardwire_ctrl ("GPO", "GND" ))==0xff) return -1;
} else {
- if ((SIGNAL_RS = drv_generic_parport_wire_data ("RS", "DB4"))==0xff) return -1;
- if ((SIGNAL_RW = drv_generic_parport_wire_data ("RW", "DB5"))==0xff) return -1;
- if ((SIGNAL_ENABLE = drv_generic_parport_wire_data ("ENABLE", "DB6"))==0xff) return -1;
- if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_data ("ENABLE2", "GND"))==0xff) return -1;
- if ((SIGNAL_GPO = drv_generic_parport_wire_data ("GPO", "GND"))==0xff) return -1;
+ if (Bits==8) {
+ if ((SIGNAL_RS = drv_generic_parport_wire_ctrl ("RS", "AUTOFD"))==0xff) return -1;
+ if ((SIGNAL_RW = drv_generic_parport_wire_ctrl ("RW", "GND" ))==0xff) return -1;
+ if ((SIGNAL_ENABLE = drv_generic_parport_wire_ctrl ("ENABLE", "STROBE"))==0xff) return -1;
+ if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_ctrl ("ENABLE2", "GND" ))==0xff) return -1;
+ if ((SIGNAL_GPO = drv_generic_parport_wire_ctrl ("GPO", "GND" ))==0xff) return -1;
+ } else {
+ if ((SIGNAL_RS = drv_generic_parport_wire_data ("RS", "DB4"))==0xff) return -1;
+ if ((SIGNAL_RW = drv_generic_parport_wire_data ("RW", "DB5"))==0xff) return -1;
+ if ((SIGNAL_ENABLE = drv_generic_parport_wire_data ("ENABLE", "DB6"))==0xff) return -1;
+ if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_data ("ENABLE2", "GND"))==0xff) return -1;
+ if ((SIGNAL_GPO = drv_generic_parport_wire_data ("GPO", "GND"))==0xff) return -1;
+ }
}
/* clear all signals */
@@ -608,7 +627,7 @@ static int drv_HD_PP_load (const char *section)
drv_HD_PP_nibble (allControllers, 0x03); udelay(T_INIT2); /* 4 Bit mode, wait 100 us */
drv_HD_PP_nibble (allControllers, 0x03); udelay(T_INIT1); /* 4 Bit mode, wait 4.1 ms */
drv_HD_PP_nibble (allControllers, 0x02); udelay(T_INIT2); /* 4 Bit mode, wait 100 us */
- drv_HD_PP_command (allControllers, 0x28, T_EXEC); /* 4 Bit mode, 1/16 duty cycle, 5x8 font */
+ drv_HD_PP_command (allControllers, 0x28, T_EXEC); /* 4 Bit mode, 1/16 duty cycle, 5x8 font */
}
/* maybe use busy-flag from now on */
@@ -617,7 +636,7 @@ static int drv_HD_PP_load (const char *section)
/* make sure we don't use the busy flag with RW wired to GND */
if (UseBusy && !SIGNAL_RW) {
- error("%s: Busyflag is to be used, but RW is wired to GND", Name);
+ error("%s: busy-flag checking is impossible with RW wired to GND!", Name);
UseBusy=0;
}
@@ -625,12 +644,17 @@ static int drv_HD_PP_load (const char *section)
/* at the moment this is inly possible with Martin Hejl's gpio driver, */
/* which allows to use 4 bits as input and 4 bits as output */
if (UseBusy && Bits==4 && !(Capabilities&CAP_BUSY4BIT)) {
- error("%s: Model '%s' does not support busy-flag checking in 4-bit-mode", Name, Models[Model].name);
+ error("%s: Model '%s' does not support busy-flag checking in 4 bit mode", Name, Models[Model].name);
UseBusy=0;
}
- info("%s: %susing busy-flag checking", Name, UseBusy?"":"not ");
+ info("%s: %susing busy-flag checking", Name, UseBusy ? "" : "not ");
+ /* The LCM-162 should really use BusyFlag checking */
+ if (!UseBusy && (Capabilities & CAP_LCM162)) {
+ error("%s: Model '%s' should definitely use busy-flag checking!", Name, Models[Model].name);
+ }
+
return 0;
}
@@ -828,6 +852,7 @@ static int drv_HD_start (const char *section, const int quiet)
if (model) free (model);
return -1;
}
+ free (model);
bus=cfg_get(section, "Bus", "parport");
if (bus==NULL && *bus=='\0') {
@@ -860,12 +885,10 @@ static int drv_HD_start (const char *section, const int quiet)
/* sanity check: Model can use bus */
if (!(Capabilities & Bus)) {
- error ("%s: Model '%s' cannot be used on the %s bus.", Name, model, bus);
- free (model);
+ error ("%s: Model '%s' cannot be used on the %s bus!", Name, Models[Model].name, bus);
free (bus);
return -1;
}
- free(model);
free(bus);
size=cfg_get(section, "Size", NULL);
@@ -884,7 +907,7 @@ static int drv_HD_start (const char *section, const int quiet)
DCOLS = cols;
if (cfg_number(section, "Controllers", 1, 1, 2, &numControllers)<0) return -1;
- info ("%s: using display with %d controllers", Name, numControllers);
+ info ("%s: using %d controller(s)", Name, numControllers);
/* current controller */
currController=1;
@@ -893,8 +916,14 @@ static int drv_HD_start (const char *section, const int quiet)
allControllers = numControllers==2 ? 3 : 1;
if (cfg_number(section, "GPOs", 0, 0, 8, &gpos)<0) return -1;
+ if (gpos > 0 && !(Capabilities & CAP_GPO)) {
+ error ("%s: Model '%s' does not support GPO's!", Name, Models[Model].name);
+ gpos = 0;
+ }
GPOS = gpos;
- info ("%s: controlling %d GPO's", Name, GPOS);
+ if (gpos > 0) {
+ info ("%s: using %d GPO's", Name, GPOS);
+ }
if (drv_HD_load(section) < 0) {
error ("%s: start display failed!", Name);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-18 18:39:24 +0000