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17A
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TextLCD
by 
Wim Huiskamp
Revision 27:22d5086f6ba6, committed 2014-06-13
- Comitter:
- wim
- Date:
- Fri Jun 13 19:02:26 2014 +0000
- Parent:
- 26:bd897a001012
- Child:
- 28:30fa94f7341c
- Commit message:
- First test of native SPI
Changed in this revision
| TextLCD.cpp | Show annotated file Show diff for this revision Revisions of this file |
| TextLCD.h | Show annotated file Show diff for this revision Revisions of this file |
--- a/TextLCD.cpp Fri May 30 15:05:13 2014 +0000
+++ b/TextLCD.cpp Fri Jun 13 19:02:26 2014 +0000
@@ -49,28 +49,25 @@
// Select and configure second LCD controller when needed
if(_type==LCD40x4) {
- _ctrl_idx=_LCDCtrl_1; // Select 2nd controller
+ _ctrl_idx=_LCDCtrl_1; // Select 2nd controller
- _initCtrl(); // Init 2nd controller
+ _initCtrl(); // Init 2nd controller
// Secondary LCD controller Clearscreen
- _writeCommand(0x01); // cls, and set cursor to 0
+ _writeCommand(0x01); // cls, and set cursor to 0
wait_ms(10); // The CLS command takes 1.64 ms.
- // Since we are not using the Busy flag, Lets be safe and take 10 ms
-
+ // Since we are not using the Busy flag, Lets be safe and take 10 ms
}
// Select and configure primary LCD controller
- _ctrl_idx=_LCDCtrl_0; // Select primary controller
+ _ctrl_idx=_LCDCtrl_0; // Select primary controller
_initCtrl(); // Init primary controller
// Primary LCD controller Clearscreen
- _writeCommand(0x01); // cls, and set cursor to 0
-
+ _writeCommand(0x01); // cls, and set cursor to 0
wait_ms(10); // The CLS command takes 1.64 ms.
- // Since we are not using the Busy flag, Lets be safe and take 10 ms
-
+ // Since we are not using the Busy flag, Lets be safe and take 10 ms
}
/** Init the LCD controller
@@ -92,54 +89,68 @@
wait_us(40); // most instructions take 40us
// Display is now in 4-bit mode
+ // Note: 4 bit mode is ignored for native SPI and I2C devices
// Device specific initialisations for DC/DC converter to generate VLCD or VLED
switch (_ctrl) {
case ST7036:
// ST7036 controller: Initialise Voltage booster for VLCD. VDD=5V
// Note: supports 1,2 or 3 lines
- _writeByte( 0x29 ); // 4-bit Databus, 2 Lines, Select Instruction table 1
+ _writeByte( 0x29 ); // 4-bit Databus, 2 Lines, Select Instruction Set = 1
wait_ms(30); // > 26,3ms
_writeByte( 0x14 ); // Bias: 1/5, 2-Lines LCD
wait_ms(30); // > 26,3ms
_writeByte( 0x55 ); // Icon off, Booster on, Set Contrast C5, C4
wait_ms(30); // > 26,3ms
- _writeByte( 0x6d ); // Voltagefollower On, Ampl ratio Rab2, Rab1, Rab0
+ _writeByte( 0x6D ); // Voltagefollower On, Ampl ratio Rab2, Rab1, Rab0
wait_ms(200); // > 200ms!
_writeByte( 0x78 ); // Set Contrast C3, C2, C1, C0
wait_ms(30); // > 26,3ms
- _writeByte( 0x28 ); // Return to Instruction table 0
+ _writeByte( 0x28 ); // Return to Instruction Set = 0
wait_ms(50);
break;
case ST7032_3V3:
// ST7032 controller: Initialise Voltage booster for VLCD. VDD=3V3
-
- _writeByte( 0x1c ); //Internal OSC frequency adjustment 183HZ, bias will be 1/4
+
+// _writeByte( 0x39 ); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Select Instruction Set = 1
+ _writeByte( 0x29 ); //FUNCTION SET 4 bit, N=1 2-line display mode, 5*7dot, Select Instruction Set = 1
+ //Note: 4 bit mode is ignored for native SPI and I2C devices
+ wait_us(30);
+ _writeByte( 0x1C ); //Internal OSC frequency adjustment 183HZ, bias will be 1/4
wait_us(30);
_writeByte( 0x73 ); //Contrast control low byte
wait_us(30);
_writeByte( 0x57 ); //booster circuit is turned on. /ICON display off. /Contrast control high byte
wait_us(30);
- _writeByte( 0x6c ); //Follower control
+ _writeByte( 0x6C ); //Follower control
wait_us(50);
- _writeByte( 0x0c ); //DISPLAY ON, not needed
+// _writeByte( 0x0C ); //DISPLAY ON, not needed
+// _writeByte( 0x38 ); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Return to Instruction Set = 0
+ _writeByte( 0x28 ); //FUNCTION SET 4 bit, N=1 2-line display mode, 5*7dot, Return to Instruction Set = 0
+ //Note: 4 bit mode is ignored for native SPI and I2C devices
wait_us(30);
break;
//Check and fix booster disable
case ST7032_5V:
// ST7032 controller: Disable Voltage booster for VLCD. VDD=5V
-
- _writeByte( 0x1c ); //Internal OSC frequency adjustment 183HZ, bias will be 1/4
+// _writeByte( 0x39 ); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Instruction Set = 1
+ _writeByte( 0x29 ); //FUNCTION SET 4 bit, N=1 2-line display mode, 5*7dot, Select Instruction Set = 1
+ //Note: 4 bit mode is ignored for native SPI and I2C devices
+ wait_us(30);
+ _writeByte( 0x1C ); //Internal OSC frequency adjustment 183HZ, bias will be 1/4
wait_us(30);
_writeByte( 0x73 ); //Contrast control low byte
wait_us(30);
_writeByte( 0x57 ); //booster circuit is turned on. /ICON display off. /Contrast control high byte
wait_us(30);
- _writeByte( 0x6c ); //Follower control
+ _writeByte( 0x6C ); //Follower control
wait_us(50);
- _writeByte( 0x0c ); //DISPLAY ON --> remove, done later?
+// _writeByte( 0x0C ); //DISPLAY ON --> remove, done later?
+// _writeByte( 0x38 ); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Instruction Set = 0
+ _writeByte( 0x28 ); //FUNCTION SET 4 bit, N=1 2-line display mode, 5*7dot, Return to Instruction Set = 0
+ //Note: 4 bit mode is ignored for native SPI and I2C devices
wait_us(30);
break;
@@ -208,7 +219,8 @@
// All other LCD types are initialised as 2 Line displays (including LCD40x4)
default:
_writeCommand(0x28); // Function set 001 DL N F - -
- // DL=0 (4 bits bus)
+ // DL=0 (4 bits bus)
+ // Note: 4 bit mode is ignored for native SPI and I2C devices
// N=1 (2 lines)
// F=0 (5x7 dots font, only option for 2 line display)
// - (Don't care)
@@ -240,8 +252,7 @@
_setCursorAndDisplayMode(_currentMode, CurOff_BlkOff);
// Second LCD controller Clearscreen
- _writeCommand(0x01); // cls, and set cursor to 0
-
+ _writeCommand(0x01); // cls, and set cursor to 0
wait_ms(10); // The CLS command takes 1.64 ms.
// Since we are not using the Busy flag, Lets be safe and take 10 ms
@@ -250,8 +261,7 @@
}
// Primary LCD controller Clearscreen
- _writeCommand(0x01); // cls, and set cursor to 0
-
+ _writeCommand(0x01); // cls, and set cursor to 0
wait_ms(10); // The CLS command takes 1.64 ms.
// Since we are not using the Busy flag, Lets be safe and take 10 ms
@@ -893,17 +903,17 @@
#if (MCP23008==1)
// MCP23008 portexpander Init
- _write_register(IODIR, 0x00); // All outputs
- _write_register(IPOL, 0x00); // No reverse polarity
- _write_register(GPINTEN, 0x00); // No interrupt
- _write_register(DEFVAL, 0x00); // Default value to compare against for interrupts
- _write_register(INTCON, 0x00); // No interrupt on changes
- _write_register(IOCON, 0x00); // Interrupt polarity
- _write_register(GPPU, 0x00); // No Pullup
- _write_register(INTF, 0x00); //
- _write_register(INTCAP, 0x00); //
- _write_register(GPIO, 0x00); // Output/Input pins
- _write_register(OLAT, 0x00); // Output Latch
+ _write_register(IODIR, 0x00); // All outputs
+ _write_register(IPOL, 0x00); // No reverse polarity
+ _write_register(GPINTEN, 0x00); // No interrupt
+ _write_register(DEFVAL, 0x00); // Default value to compare against for interrupts
+ _write_register(INTCON, 0x00); // No interrupt on changes
+ _write_register(IOCON, 0x00); // Interrupt polarity
+ _write_register(GPPU, 0x00); // No Pullup
+ _write_register(INTF, 0x00); //
+ _write_register(INTCAP, 0x00); //
+ _write_register(GPIO, 0x00); // Output/Input pins
+ _write_register(OLAT, 0x00); // Output Latch
// Init the portexpander bus
_lcd_bus = D_LCD_BUS_DEF;
@@ -1264,8 +1274,6 @@
_bl = NULL; //Construct dummy pin
}
- _writeByte( 0x39 ); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot IS=1
- wait_us(30);
_init();
}
--- a/TextLCD.h Fri May 30 15:05:13 2014 +0000
+++ b/TextLCD.h Fri Jun 13 19:02:26 2014 +0000
@@ -38,8 +38,8 @@
/** A TextLCD interface for driving 4-bit HD44780-based LCDs
*
* Currently supports 8x1, 8x2, 12x4, 16x1, 16x2, 16x4, 20x2, 20x4, 24x2, 24x4, 40x2 and 40x4 panels
- * Interface options include direct mbed pins, I2C portexpander (PCF8474, PCF8574A, MCP23008) or SPI bus shiftregister (74595)
- * Supports some controllers that provide internal DC/DC converters for VLCD or VLED.
+ * Interface options include direct mbed pins, I2C portexpander (PCF8474/PCF8574A or MCP23008) or SPI bus shiftregister (74595).
+ * Supports some controllers with native I2C or SP interface. Supports some controllers that provide internal DC/DC converters for VLCD or VLED.
*
* @code
* #include "mbed.h"
@@ -55,7 +55,7 @@
* //TextLCD_SPI lcd(&spi_lcd, p8, TextLCD::LCD40x4); // SPI bus, CS pin, LCD Type
* TextLCD_I2C lcd(&i2c_lcd, 0x42, TextLCD::LCD20x4); // I2C bus, PCF8574 Slaveaddress, LCD Type
* //TextLCD_I2C lcd(&i2c_lcd, 0x42, TextLCD::LCD16x2, TextLCD::WS0010); // I2C bus, PCF8574 Slaveaddress, LCD Type, Device Type
- * //TextLCD_SPI_N lcd(&spi_lcd, p8, p9); // SPI bus, CS pin, RS pin, LCDType=LCD16x2, BL=NC, LCDTCtrl=ST7032
+ * //TextLCD_SPI_N lcd(&spi_lcd, p8, p9); // SPI bus, CS pin, RS pin, LCDType=LCD16x2, BL=NC, LCDTCtrl=ST7032_3V3
*
* int main() {
* lcd.printf("Hello World!\n");
@@ -68,8 +68,8 @@
//LCD and serial portexpanders should be wired accordingly
//
//Select Hardware module (one option only)
-#define DEFAULT 1
-#define ADAFRUIT 0
+#define DEFAULT 0
+#define ADAFRUIT 1
#define DFROBOT 0
@@ -251,7 +251,7 @@
/** A TextLCD interface for driving 4-bit HD44780-based LCDs
*
* @brief Currently supports 8x1, 8x2, 12x2, 12x4, 16x1, 16x2, 16x4, 20x2, 20x4, 24x2, 24x4, 40x2 and 40x4 panels
- * Interface options include direct mbed pins, I2C portexpander (PCF8474, PCF8574A) or SPI bus shiftregister (74595) and some native I2C or SPI devices
+ * Interface options include direct mbed pins, I2C portexpander (PCF8474/PCF8574A or MCP23008) or SPI bus shiftregister (74595) and some native I2C or SPI devices
*
*/
class TextLCD_Base : public Stream {