Joachim Andersen
1
Diff: TextLCD.h
- Revision:
- 20:e0da005a777f
- Parent:
- 19:c747b9e2e7b8
- Child:
- 21:9eb628d9e164
diff -r c747b9e2e7b8 -r e0da005a777f TextLCD.h
--- a/TextLCD.h Fri Apr 19 19:36:37 2013 +0000
+++ b/TextLCD.h Mon May 13 19:29:13 2013 +0000
@@ -6,6 +6,7 @@
* 2013, v04: WH, Added support for Display On/Off, improved 4bit bootprocess
* 2013, v05: WH, Added support for 8x2B, added some UDCs
* 2013, v06: WH, Added support for devices that use internal DC/DC converters
+ * 2013, v07: WH, Added support for backlight and include portdefinitions for LCD2004 Module from DFROBOT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
@@ -48,7 +49,7 @@
* // SPI Communication
* SPI spi_lcd(p5, NC, p7); // MOSI, MISO, SCLK
*
- * TextLCD lcd(p15, p16, p17, p18, p19, p20); // RS, E, D4-D7, LCDType=LCD16x2
+ * TextLCD lcd(p15, p16, p17, p18, p19, p20); // RS, E, D4-D7, LCDType=LCD16x2, BL=NC, E2=NC, LCDTCtrl=HD44780
* //TextLCD lcd(&spi_lcd, p8, TextLCD::LCD40x4); // SPI bus, CS pin, LCD Type
* //TextLCD lcd(&i2c_lcd, 0x42, TextLCD::LCD20x4); // I2C bus, PCF8574 Slaveaddress, LCD Type
* //TextLCD lcd(&i2c_lcd, 0x42, TextLCD::LCD16x2, TextLCD::WS0010); // I2C bus, PCF8574 Slaveaddress, LCD Type, Device Type
@@ -59,13 +60,14 @@
* @endcode
*/
-
//Pin Defines for I2C PCF8574 and SPI 74595 Bus interfaces
//LCD and serial portexpanders should be wired accordingly
+//
+#if (1)
+//Definitions for hardware used by WH
//Note: LCD RW pin must be connected to GND
// E2 is used for LCD40x4 (second controller)
// BL may be used for future expansion to control backlight
-//
#define D_LCD_PIN_D4 0
#define D_LCD_PIN_D5 1
#define D_LCD_PIN_D6 2
@@ -75,8 +77,26 @@
#define D_LCD_PIN_E2 6
#define D_LCD_PIN_BL 7
-#define D_LCD_BUS_MSK 0x0F
-#define D_LCD_BUS_DEF 0x00
+#define D_LCD_PIN_RW D_LCD_PIN_E2
+
+#else
+
+//Definitions for LCD2004 Module from DFROBOT, See http://arduino-info.wikispaces.com/LCD-Blue-I2C
+//This hardware is different from earlier/different Arduino I2C LCD displays
+//Note: LCD RW pin must be kept LOW
+// E2 is not available on default Arduino hardware and does not support LCD40x4 (second controller)
+// BL is used to control backlight
+#define D_LCD_PIN_RS 0
+#define D_LCD_PIN_RW 1
+#define D_LCD_PIN_E 2
+#define D_LCD_PIN_BL 3
+#define D_LCD_PIN_D4 4
+#define D_LCD_PIN_D5 5
+#define D_LCD_PIN_D6 6
+#define D_LCD_PIN_D7 7
+
+#define D_LCD_PIN_E2 D_LCD_PIN_RW
+#endif
//Bitpattern Defines for I2C PCF8574 and SPI 74595 Bus
//
@@ -88,6 +108,11 @@
#define D_LCD_E (1<<D_LCD_PIN_E)
#define D_LCD_E2 (1<<D_LCD_PIN_E2)
#define D_LCD_BL (1<<D_LCD_PIN_BL)
+//#define D_LCD_RW (1<<D_LCD_PIN_RW)
+
+
+#define D_LCD_BUS_MSK (D_LCD_D4 | D_LCD_D5 | D_LCD_D6 | D_LCD_D7)
+#define D_LCD_BUS_DEF 0x00
/** Some sample User Defined Chars 5x7 dots */
@@ -164,7 +189,7 @@
enum LCDCtrl {
HD44780, /**< HD44780 (default) */
WS0010, /**< WS0010 OLED Controller */
- ST7063 /**< ST7063 */
+ ST7036 /**< ST7036 */
};
@@ -183,6 +208,11 @@
DispOn = 0x04 /**< Display On */
};
+ /** LCD Backlight control */
+ enum LCDBacklight {
+ LightOff, /**< Backlight Off */
+ LightOn /**< Backlight On */
+ };
/** Create a TextLCD interface for using regular mbed pins
*
@@ -190,10 +220,11 @@
* @param e Enable line (clock)
* @param d4-d7 Data lines for using as a 4-bit interface
* @param type Sets the panel size/addressing mode (default = LCD16x2)
+ * @param bl Backlight control line (optional, default = NC)
* @param e2 Enable2 line (clock for second controller, LCD40x4 only)
* @param ctrl LCD controller (default = HD44780)
*/
- TextLCD(PinName rs, PinName e, PinName d4, PinName d5, PinName d6, PinName d7, LCDType type = LCD16x2, PinName e2 = NC, LCDCtrl ctrl = HD44780);
+ TextLCD(PinName rs, PinName e, PinName d4, PinName d5, PinName d6, PinName d7, LCDType type = LCD16x2, PinName bl = NC, PinName e2 = NC, LCDCtrl ctrl = HD44780);
/** Create a TextLCD interface using an I2C PC8574 portexpander
*
@@ -283,6 +314,12 @@
*/
void setMode(TextLCD::LCDMode displayMode);
+ /** Set the Backlight mode
+ *
+ * @param backlightMode The Backlight mode (LightOff, LightOn)
+ */
+ void setBacklight(TextLCD::LCDBacklight backlightMode);
+
/** Set User Defined Characters
*
@@ -291,6 +328,7 @@
*/
void setUDC(unsigned char c, char *udc_data);
+
protected:
/* LCD Bus control */
enum _LCDBus {
@@ -326,6 +364,7 @@
//Low level writes to LCD Bus (serial or parallel)
void _setEnable(bool value);
void _setRS(bool value);
+ void _setBL(bool value);
void _setData(int value);
void _setCS(bool value);
@@ -334,7 +373,7 @@
// Regular mbed pins bus
- DigitalOut _rs, _e, _e2;
+ DigitalOut _rs, _e, _bl, _e2;
BusOut _d;
// I2C bus