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support for contrast & brightness: now get_*() only, but prepare for set_*()

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This commit is contained in:
marschap
2007-10-21 19:39:24 +00:00
parent 75dbe30705
commit fe5f26e91d
3 changed files with 321 additions and 139 deletions
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server/drivers/hd44780-low.h
+63 -41
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@@ -47,6 +47,11 @@
#define IF_TYPE_USB 3
#define IF_TYPE_I2C 4
// symbolic default values
#define DEFAULT_CONTRAST 800
#define DEFAULT_BRIGHTNESS 800
#define DEFAULT_OFFBRIGHTNESS 300
// Maximum sizes of the keypad
// DO NOT CHANGE THESE 2 VALUES, unless you change the functions too
@@ -56,6 +61,7 @@
/* Constants for userdefchar_mode */
#define NUM_CCs 8 /* number of custom characters */
typedef enum {
standard, /* only char 0 is used for heartbeat */
vbar, /* vertical bars */
@@ -64,11 +70,13 @@ typedef enum {
bigchar /* big characters */
} CGmode;
typedef struct cgram_cache {
unsigned char cache[LCD_DEFAULT_CELLHEIGHT];
int clean;
} CGram;
typedef struct ConnectionMapping {
char *name;
int connectiontype;
@@ -76,8 +84,8 @@ typedef struct ConnectionMapping {
int (*init_fn)(Driver *drvthis);
} ConnectionMapping;
typedef struct driver_private_data {
typedef struct driver_private_data {
unsigned int port;
/* for serial connection type */
@@ -151,8 +159,13 @@ typedef struct driver_private_data {
int keepalivedisplay; // When >0 refresh upper left char every <keepalivedisplay> seconds to keep display alive
int output_state; // what was most recently output to the output port
int contrast; // Contrast setting (range 0 - 1000)
int brightness; // Brightness when backlight is "on" (range 0 - 1000)
int offbrightness; // Brightness when backlight is "off" (range 0 - 1000)
} PrivateData;
// Structures holding pointers to HD44780 specific functions
typedef struct hwDependentFns {
// microsec pauses
@@ -168,6 +181,15 @@ typedef struct hwDependentFns {
// state - to be or not to be on
void (*backlight)(PrivateData *p, unsigned char state);
// Set the contrast
// value - new value to be set
void (*set_contrast)(PrivateData *p, unsigned char value);
// Switch the backlight on or off
// state - backlight state to set the new value for
// value - new value to be set
void (*set_brightness)(PrivateData *p, int backlight, unsigned char value);
// Read the keypad
// Ydata - the up to 11 bits that should be put on the Y side of the matrix
// return - the up to 5 bits that are read out on the X side of the matrix
@@ -193,57 +215,57 @@ void common_init(PrivateData *p, unsigned char if_bit);
// commands for senddata
#define RS_DATA 0x00
#define RS_INSTR 0x01
#define RS_DATA 0x00
#define RS_INSTR 0x01
#define CLEAR 0x01
#define CLEAR 0x01
#define HOMECURSOR 0x02
#define HOMECURSOR 0x02
#define ENTRYMODE 0x04
#define E_MOVERIGHT 0x02
#define E_MOVELEFT 0x00
#define EDGESCROLL 0x01
#define NOSCROLL 0x00
#define ENTRYMODE 0x04
#define E_MOVERIGHT 0x02
#define E_MOVELEFT 0x00
#define EDGESCROLL 0x01
#define NOSCROLL 0x00
#define ONOFFCTRL 0x08 /* Only reachable with EXTREG clear */
#define DISPON 0x04
#define DISPOFF 0x00
#define CURSORON 0x02
#define CURSOROFF 0x00
#define CURSORBLINK 0x01
#define CURSORNOBLINK 0x00
#define ONOFFCTRL 0x08 /* Only reachable with EXTREG clear */
#define DISPON 0x04
#define DISPOFF 0x00
#define CURSORON 0x02
#define CURSOROFF 0x00
#define CURSORBLINK 0x01
#define CURSORNOBLINK 0x00
#define EXTMODESET 0x08 /* Only reachable with EXTREG set */
#define FONT6WIDE 0x04
#define INVCURSOR 0x02
#define FOURLINE 0x01
#define EXTMODESET 0x08 /* Only reachable with EXTREG set */
#define FONT6WIDE 0x04
#define INVCURSOR 0x02
#define FOURLINE 0x01
#define CURSORSHIFT 0x10 /* Only reachable with EXTREG clear */
#define SCROLLDISP 0x08
#define MOVECURSOR 0x00
#define MOVERIGHT 0x04
#define MOVELEFT 0x00
#define CURSORSHIFT 0x10 /* Only reachable with EXTREG clear */
#define SCROLLDISP 0x08
#define MOVECURSOR 0x00
#define MOVERIGHT 0x04
#define MOVELEFT 0x00
#define HSCROLLEN 0x10 /* Only reachable with EXTREG set */
#define HSCROLLEN 0x10 /* Only reachable with EXTREG set */
#define FUNCSET 0x20
#define IF_8BIT 0x10
#define IF_4BIT 0x00
#define TWOLINE 0x08
#define ONELINE 0x00
#define LARGECHAR 0x04 /* 5x11 characters */
#define SMALLCHAR 0x00 /* 5x8 characters */
#define EXTREG 0x04 /* Select ext. registers (Yes, the same bits)*/
#define SEGBLINK 0x02 /* Only reachable with EXTREG set */
#define POWERDOWN 0x01 /* Only reachable with EXTREG set */
#define FUNCSET 0x20
#define IF_8BIT 0x10
#define IF_4BIT 0x00
#define TWOLINE 0x08
#define ONELINE 0x00
#define LARGECHAR 0x04 /* 5x11 characters */
#define SMALLCHAR 0x00 /* 5x8 characters */
#define EXTREG 0x04 /* Select ext. registers (Yes, the same bits)*/
#define SEGBLINK 0x02 /* Only reachable with EXTREG set */
#define POWERDOWN 0x01 /* Only reachable with EXTREG set */
#define SETCHAR 0x40 /* Only reachable with EXTREG clear */
#define SETCHAR 0x40 /* Only reachable with EXTREG clear */
#define SETSEG 0x40 /* Only reachable with EXTREG set */
#define SETSEG 0x40 /* Only reachable with EXTREG set */
#define POSITION 0x80 /* Only reachable with EXTREG clear */
#define POSITION 0x80 /* Only reachable with EXTREG clear */
#define HSCROLLAMOUNT 0x80 /* Only reachable with EXTREG set */
#define HSCROLLAMOUNT 0x80 /* Only reachable with EXTREG set */
#endif