diff options
Diffstat (limited to '')
| -rw-r--r-- | drv_HD44780.c | 59 |
1 files changed, 39 insertions, 20 deletions
diff --git a/drv_HD44780.c b/drv_HD44780.c index 6d66903..4ad177d 100644 --- a/drv_HD44780.c +++ b/drv_HD44780.c @@ -1,4 +1,4 @@ -/* $Id: drv_HD44780.c,v 1.57 2005/12/12 09:08:08 reinelt Exp $ +/* $Id: drv_HD44780.c,v 1.58 2005/12/20 07:07:44 reinelt Exp $ * * new style driver for HD44780-based displays * @@ -32,6 +32,9 @@ * * * $Log: drv_HD44780.c,v $ + * Revision 1.58 2005/12/20 07:07:44 reinelt + * further work on GPO's, HD44780 GPO support + * * Revision 1.57 2005/12/12 09:08:08 reinelt * finally removed old udelay code path; read timing values from config * @@ -288,6 +291,7 @@ #include "widget_bar.h" #include "drv.h" #include "drv_generic_text.h" +#include "drv_generic_gpio.h" #include "drv_generic_parport.h" #ifdef WITH_I2C @@ -333,10 +337,8 @@ static unsigned char SIGNAL_GPO; /* flag for busy-waiting vs. busy flag checking */ static int UseBusy = 0; - -/* Fixme: GPO's not yet implemented */ -static int GPOS; -/* static int GPO=0; */ +/* buffer holding the GPO state */ +static unsigned char GPO = 0; typedef struct { @@ -1115,24 +1117,32 @@ static int drv_HD_brightness(int brightness) } -/* Fixme: GPO's */ -#if 0 -static void drv_HD_setGPO(const int bits) +static int drv_HD_GPO(const int num, const int val) { - if (Lcd.gpos > 0) { - - /* put data on DB1..DB8 */ - drv_generic_parport_data(bits); - - /* 74HCT573 set-up time */ - ndelay(20); - - /* send data */ - /* 74HCT573 enable pulse width = 24ns */ - drv_generic_parport_toggle(SIGNAL_GPO, 1, 230); + int v; + + if (val > 0) { + /* set bit */ + v = 1; + GPO |= 1 << num; + } else { + /* clear bit */ + v = 0; + GPO &= ~(1 << num); } + + /* put data on DB1..DB8 */ + drv_generic_parport_data(GPO); + + /* 74HCT573 set-up time */ + ndelay(20); + + /* send data */ + /* 74HCT573 enable pulse width = 24ns */ + drv_generic_parport_toggle(SIGNAL_GPO, 1, 230); + + return v; } -#endif static void drv_HD_LCM162_timer(void __attribute__ ((unused)) * notused) @@ -1400,6 +1410,7 @@ static void plugin_brightness(RESULT * result, RESULT * arg1) /* using drv_generic_text_draw(W) */ /* using drv_generic_text_icon_draw(W) */ /* using drv_generic_text_bar_draw(W) */ +/* using drv_generic_gpio_draw(W) */ /****************************************/ @@ -1436,6 +1447,7 @@ int drv_HD_init(const char *section, const int quiet) /* real worker functions */ drv_generic_text_real_write = drv_HD_write; drv_generic_text_real_defchar = drv_HD_defchar; + drv_generic_gpio_real_set = drv_HD_GPO; /* start display */ @@ -1454,6 +1466,12 @@ int drv_HD_init(const char *section, const int quiet) if ((ret = drv_generic_text_bar_init(0)) != 0) return ret; + /* initialize generic GPIO driver */ + if (GPOS > 0) { + if ((ret = drv_generic_gpio_init(section, Name)) != 0) + return ret; + } + /* add fixed chars to the bar driver */ /* most displays have a full block on ascii 255, but some have kind of */ /* an 'inverted P'. If you specify 'asc255bug 1 in the config, this */ @@ -1497,6 +1515,7 @@ int drv_HD_quit(const int quiet) info("%s: shutting down.", Name); drv_generic_text_quit(); + drv_generic_gpio_quit(); /* clear display */ drv_HD_clear(); |