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Added I2C port expander support to HD44780

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This commit is contained in:
Bob Clough 2013-02-25 14:22:14 +00:00
parent 06272f463d
commit 2b567d1df5
2 changed files with 22 additions and 8 deletions
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4
Marlin/Configuration.h
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@ -354,8 +354,8 @@ const bool Z_ENDSTOPS_INVERTING = true; // set to true to invert the logic of th
//The LCD is attached via an I2C port expander. //The LCD is attached via an I2C port expander.
//#define LCD_I2C //#define LCD_I2C
#ifdef LCD_I2C #ifdef LCD_I2C
// Port Expander Type - PCF8574 or MCP23008 // Port Expander Type - 0=PCF8574 or 1=MCP23008
#define LCD_I2C_TYPE PCF8574 #define LCD_I2C_TYPE 0
// I2C Address of the port expander // I2C Address of the port expander
#define LCD_I2C_ADDRESS 0x20 #define LCD_I2C_ADDRESS 0x20
#endif #endif

24
Marlin/ultralcd_implementation_hitachi_HD44780.h
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@ -7,11 +7,16 @@
**/ **/
#if LANGUAGE_CHOICE == 6 #if LANGUAGE_CHOICE == 6
#include "LiquidCrystalRus.h" #include "LiquidCrystalRus.h"
#define LCD_CLASS LiquidCrystalRus #define LCD_CLASS LiquidCrystalRus
#else #else
#include <LiquidCrystal.h> #ifdef LCD_I2C
#define LCD_CLASS LiquidCrystal #include <LiquidCrystal_I2C.h>
#define LCD_CLASS LiquidCrystal_I2C
#else
#include <LiquidCrystal.h>
#define LCD_CLASS LiquidCrystal
#endif
#endif #endif
/* Custom characters defined in the first 8 characters of the LCD */ /* Custom characters defined in the first 8 characters of the LCD */
@ -25,7 +30,12 @@
#define LCD_STR_CLOCK "\x07" #define LCD_STR_CLOCK "\x07"
#define LCD_STR_ARROW_RIGHT "\x7E" /* from the default character set */ #define LCD_STR_ARROW_RIGHT "\x7E" /* from the default character set */
LCD_CLASS lcd(LCD_PINS_RS, LCD_PINS_ENABLE, LCD_PINS_D4, LCD_PINS_D5,LCD_PINS_D6,LCD_PINS_D7); //RS,Enable,D4,D5,D6,D7 #ifdef LCD_I2C
LCD_CLASS lcd(LCD_I2C_ADDRESS, LCD_WIDTH, LCD_HEIGHT, LCD_I2C_TYPE); //address, columns, rows, type
#else
LCD_CLASS lcd(LCD_PINS_RS, LCD_PINS_ENABLE, LCD_PINS_D4, LCD_PINS_D5,LCD_PINS_D6,LCD_PINS_D7); //RS,Enable,D4,D5,D6,D7
#endif
static void lcd_implementation_init() static void lcd_implementation_init()
{ {
byte bedTemp[8] = byte bedTemp[8] =
@ -111,7 +121,11 @@ static void lcd_implementation_init()
B00000, B00000,
B00000 B00000
}; //thanks Sonny Mounicou }; //thanks Sonny Mounicou
#ifdef LCD_I2C
lcd.init();
#else
lcd.begin(LCD_WIDTH, LCD_HEIGHT); lcd.begin(LCD_WIDTH, LCD_HEIGHT);
#endif
lcd.createChar(LCD_STR_BEDTEMP[0], bedTemp); lcd.createChar(LCD_STR_BEDTEMP[0], bedTemp);
lcd.createChar(LCD_STR_DEGREE[0], degree); lcd.createChar(LCD_STR_DEGREE[0], degree);
lcd.createChar(LCD_STR_THERMOMETER[0], thermometer); lcd.createChar(LCD_STR_THERMOMETER[0], thermometer);