Wim Huiskamp
Updated for more display types. Fixed memoryaddress confusion in address() method. Added new getAddress() method. Added support for UDCs, Backlight control and other features such as control through I2C and SPI port expanders and controllers with native I2C and SPI interfaces. Refactored to fix issue with pins that are default declared as NC.
Dependents: GPSDevice TestTextLCD SD to Flash Data Transfer DrumMachine ... more
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TextLCD
by 
Simon Ford
Example
Hello World! for the TextLCD
#include "mbed.h"
#include "TextLCD.h"
// Host PC Communication channels
Serial pc(USBTX, USBRX); // tx, rx
// I2C Communication
I2C i2c_lcd(p28,p27); // SDA, SCL
// 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, BL=NC, E2=NC, LCDTCtrl=HD44780
//TextLCD_SPI lcd(&spi_lcd, p8, TextLCD::LCD40x4); // SPI bus, 74595 expander, 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_3V3
//TextLCD_I2C_N lcd(&i2c_lcd, ST7032_SA, TextLCD::LCD16x2, NC, TextLCD::ST7032_3V3); // I2C bus, Slaveaddress, LCD Type, BL=NC, LCDTCtrl=ST7032_3V3
int main() {
pc.printf("LCD Test. Columns=%d, Rows=%d\n\r", lcd.columns(), lcd.rows());
for (int row=0; row<lcd.rows(); row++) {
int col=0;
pc.printf("MemAddr(Col=%d, Row=%d)=0x%02X\n\r", col, row, lcd.getAddress(col, row));
// lcd.putc('-');
lcd.putc('0' + row);
for (col=1; col<lcd.columns()-1; col++) {
lcd.putc('*');
}
pc.printf("MemAddr(Col=%d, Row=%d)=0x%02X\n\r", col, row, lcd.getAddress(col, row));
lcd.putc('+');
}
// Show cursor as blinking character
lcd.setCursor(TextLCD::CurOff_BlkOn);
// Set and show user defined characters. A maximum of 8 UDCs are supported by the HD44780.
// They are defined by a 5x7 bitpattern.
lcd.setUDC(0, (char *) udc_0); // Show |>
lcd.putc(0);
lcd.setUDC(1, (char *) udc_1); // Show <|
lcd.putc(1);
}
Handbook page
More info is here
Diff: TextLCD.cpp
- Revision:
- 30:033048611c01
- Parent:
- 29:a3663151aa65
- Child:
- 31:ef31cd8a00d1
--- a/TextLCD.cpp Tue Jun 17 17:41:47 2014 +0000
+++ b/TextLCD.cpp Sat Jun 28 14:27:32 2014 +0000
@@ -10,7 +10,7 @@
* 2014, v08: WH, Refactored in Base and Derived Classes to deal with mbed lib change regarding 'NC' defined pins
* 2014, v09: WH/EO, Added Class for Native SPI controllers such as ST7032
* 2014, v10: WH, Added Class for Native I2C controllers such as ST7032i, Added support for MCP23008 I2C portexpander, Added support for Adafruit module
- * 2014, v11: WH, Added support for native I2C controllers such as PCF21XX, improved the _initCtrl() method to deal with differences between all supported controllers
+ * 2014, v11: WH, Added support for native I2C controllers such as PCF21XX, Improved the _initCtrl() method to deal with differences between all supported controllers
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
@@ -34,17 +34,81 @@
#include "TextLCD.h"
#include "mbed.h"
-
-DigitalOut led1(LED1);
-DigitalOut led2(LED2);
+//For Testing only
+//DigitalOut led1(LED1);
+//DigitalOut led2(LED2);
+// led2=!led2;
+/** Some sample User Defined Chars 5x7 dots */
+const char udc_ae[] = {0x00, 0x00, 0x1B, 0x05, 0x1F, 0x14, 0x1F, 0x00}; //æ
+const char udc_0e[] = {0x00, 0x00, 0x0E, 0x13, 0x15, 0x19, 0x0E, 0x00}; //ø
+const char udc_ao[] = {0x0E, 0x0A, 0x0E, 0x01, 0x0F, 0x11, 0x0F, 0x00}; //å
+const char udc_AE[] = {0x0F, 0x14, 0x14, 0x1F, 0x14, 0x14, 0x17, 0x00}; //Æ
+const char udc_0E[] = {0x0E, 0x13, 0x15, 0x15, 0x15, 0x19, 0x0E, 0x00}; //Ø
+const char udc_Ao[] = {0x0E, 0x0A, 0x0E, 0x11, 0x1F, 0x11, 0x11, 0x00}; //Å
+const char udc_PO[] = {0x04, 0x0A, 0x0A, 0x1F, 0x1B, 0x1B, 0x1F, 0x00}; //Padlock Open
+const char udc_PC[] = {0x1C, 0x10, 0x08, 0x1F, 0x1B, 0x1B, 0x1F, 0x00}; //Padlock Closed
+
+const char udc_0[] = {0x18, 0x14, 0x12, 0x11, 0x12, 0x14, 0x18, 0x00}; // |>
+const char udc_1[] = {0x03, 0x05, 0x09, 0x11, 0x09, 0x05, 0x03, 0x00}; // <|
+const char udc_2[] = {0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00}; // |
+const char udc_3[] = {0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x00}; // ||
+const char udc_4[] = {0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x00}; // |||
+const char udc_5[] = {0x00, 0x1f, 0x00, 0x1f, 0x00, 0x1f, 0x00, 0x00}; // =
+const char udc_6[] = {0x15, 0x0a, 0x15, 0x0a, 0x15, 0x0a, 0x15, 0x00}; // checkerboard
+const char udc_7[] = {0x10, 0x08, 0x04, 0x02, 0x01, 0x00, 0x10, 0x00}; // \
+
+const char udc_degr[] = {0x06, 0x09, 0x09, 0x06, 0x00, 0x00, 0x00, 0x00}; // Degree symbol
+
+const char udc_TM_T[] = {0x1F, 0x04, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00}; // Trademark T
+const char udc_TM_M[] = {0x11, 0x1B, 0x15, 0x11, 0x00, 0x00, 0x00, 0x00}; // Trademark M
+
+//const char udc_Bat_Hi[] = {0x0E, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x00}; // Battery Full
+//const char udc_Bat_Ha[] = {0x0E, 0x11, 0x13, 0x17, 0x1F, 0x1F, 0x1F, 0x00}; // Battery Half
+//const char udc_Bat_Lo[] = {0x0E, 0x11, 0x11, 0x11, 0x11, 0x11, 0x1F, 0x00}; // Battery Low
+const char udc_Bat_Hi[] = {0x0E, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x00}; // Battery Full
+const char udc_Bat_Ha[] = {0x0E, 0x11, 0x11, 0x1F, 0x1F, 0x1F, 0x1F, 0x00}; // Battery Half
+const char udc_Bat_Lo[] = {0x0E, 0x11, 0x11, 0x11, 0x11, 0x1F, 0x1F, 0x00}; // Battery Low
+const char udc_AC[] = {0x0A, 0x0A, 0x1F, 0x11, 0x0E, 0x04, 0x04, 0x00}; // AC Power
+
+//const char udc_smiley[] = {0x00, 0x0A, 0x00, 0x04, 0x11, 0x0E, 0x00, 0x00}; // Smiley
+//const char udc_droopy[] = {0x00, 0x0A, 0x00, 0x04, 0x00, 0x0E, 0x11, 0x00}; // Droopey
+//const char udc_note[] = {0x01, 0x03, 0x05, 0x09, 0x0B, 0x1B, 0x18, 0x00}; // Note
+
+//const char udc_bar_1[] = {0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00}; // Bar 1
+//const char udc_bar_2[] = {0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x00}; // Bar 11
+//const char udc_bar_3[] = {0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x00}; // Bar 111
+//const char udc_bar_4[] = {0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x00}; // Bar 1111
+//const char udc_bar_5[] = {0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x00}; // Bar 11111
+
+//const char udc_ch_1[] = {0x1f, 0x00, 0x1f, 0x00, 0x1f, 0x00, 0x1f, 0x00}; // Hor bars 4
+//const char udc_ch_2[] = {0x00, 0x1f, 0x00, 0x1f, 0x00, 0x1f, 0x00, 0x1f}; // Hor bars 4 (inverted)
+//const char udc_ch_3[] = {0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15}; // Ver bars 3
+//const char udc_ch_4[] = {0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a}; // Ver bars 3 (inverted)
+//const char udc_ch_yr[] = {0x08, 0x0f, 0x12, 0x0f, 0x0a, 0x1f, 0x02, 0x02}; // Year (kana)
+//const char udc_ch_mo[] = {0x0f, 0x09, 0x0f, 0x09, 0x0f, 0x09, 0x09, 0x13}; // Month (kana)
+//const char udc_ch_dy[] = {0x1f, 0x11, 0x11, 0x1f, 0x11, 0x11, 0x11, 0x1F}; // Day (kana)
+//const char udc_ch_mi[] = {0x0C, 0x0a, 0x11, 0x1f, 0x09, 0x09, 0x09, 0x13}; // minute (kana)
+
+
/** Create a TextLCD_Base interface
*
* @param type Sets the panel size/addressing mode (default = LCD16x2)
* @param ctrl LCD controller (default = HD44780)
*/
TextLCD_Base::TextLCD_Base(LCDType type, LCDCtrl ctrl) : _type(type), _ctrl(ctrl) {
+
+ // Extract LCDType data
+
+ // Columns encoded in b7..b0
+ _nr_cols = (_type & 0xFF);
+
+ // Rows encoded in b15..b8
+ _nr_rows = ((_type >> 8) & 0xFF);
+
+ // Addressing mode encoded in b19..b16
+ _addr_mode = _type & LCD_T_ADR_MSK;
}
@@ -55,25 +119,24 @@
// Select and configure second LCD controller when needed
if(_type==LCD40x4) {
- _ctrl_idx=_LCDCtrl_1; // Select 2nd controller
-
- _initCtrl(); // Init 2nd controller
-
+ _ctrl_idx=_LCDCtrl_1; // Select 2nd controller
+ _initCtrl(); // Init 2nd controller
}
// Select and configure primary LCD controller
_ctrl_idx=_LCDCtrl_0; // Select primary controller
-
_initCtrl(); // Init primary controller
// Reset Cursor location
_row=0;
- _column=0;
+ _column=0;
+
}
/** Init the LCD controller
* 4-bit mode, number of lines, fonttype, no cursor etc
- *
+ *
+ * Note: some configurations are commented out because they have not yet been tested due to lack of hardware
*/
void TextLCD_Base::_initCtrl() {
@@ -102,52 +165,65 @@
case LCD8x2B: //8x2B is a special case of 16x1
// case LCD12x1:
case LCD16x1:
+// case LCD20x1:
case LCD24x1:
-//@TODO check config
- _writeCommand(0x20); // Function set 001 DL N F - -
- // DL=0 (4 bits bus)
- // N=0 (1 line)
- // F=0 (5x7 dots font)
+ _writeCommand(0x20); // Function set 001 DL N RE(0) DH REV
+ // DL=0 (4 bits bus)
+ // N=0 (1 line)
+ // RE=0 (Dis. Extended Regs, special mode for KS0078)
+ // DH=0 (Disp shift=disable, special mode for KS0078)
+ // REV=0 (Reverse=Normal, special mode for KS0078)
+
+
+
break;
- case LCD24x4B:
- // Special mode for KS0078
- _writeCommand(0x2A); // Function set 001 DL N RE DH REV
+// case LCD12x3D: // Special mode for KS0078
+// case LCD12x3D1: // Special mode for KS0078
+// case LCD12x4D: // Special mode for KS0078
+// case LCD16x3D:
+// case LCD16x4D:
+// case LCD24x3D: // Special mode for KS0078
+// case LCD24x3D1: // Special mode for KS0078
+ case LCD24x4D: // Special mode for KS0078
+
+ _writeCommand(0x2A); // Function set 001 DL N RE(0) DH REV
// DL=0 (4 bits bus)
- // N=1 (Dont care for KS0078)
+ // N=1 (Dont care for KS0078 in 4-line mode)
// RE=0 (Dis. Extended Regs, special mode for KS0078)
- // DH=1 (Disp shift, special mode for KS0078)
- // REV=0 (Reverse, special mode for KS0078)
+ // DH=1 (Disp shift=enable, special mode for KS0078)
+ // REV=0 (Reverse=Normal, special mode for KS0078)
- _writeCommand(0x2E); // Function set 001 DL N RE DH REV
+ _writeCommand(0x2E); // Function set 001 DL N RE(1) BE 0
// DL=0 (4 bits bus)
- // N=1 (Dont care for KS0078)
+ // N=1 (Dont care for KS0078 in 4-line mode)
// RE=1 (Ena Extended Regs, special mode for KS0078)
- // DH=1 (Disp shift, special mode for KS0078)
- // REV=0 (Reverse, special mode for KS0078)
+ // BE=1 (Blink Enable, CG/SEG RAM, special mode for KS0078)
+ // X=0 (Reverse, special mode for KS0078)
_writeCommand(0x09); // Ext Function set 0000 1 FW BW NW
// FW=0 (5-dot font, special mode for KS0078)
// BW=0 (Cur BW invert disable, special mode for KS0078)
// NW=1 (4 Line, special mode for KS0078)
- _writeCommand(0x2A); // Function set 001 DL N RE DH REV
+ _writeCommand(0x2A); // Function set 001 DL N RE(0) DH REV
// DL=0 (4 bits bus)
- // N=1 (Dont care for KS0078)
+ // N=1 (Dont care for KS0078 in 4 line mode)
// RE=0 (Dis. Extended Regs, special mode for KS0078)
- // DH=1 (Disp shift, special mode for KS0078)
- // REV=0 (Reverse, special mode for KS0078)
-
- // All other LCD types are initialised as 2 Line displays (including LCD40x4)
+ // DH=1 (Disp shift enable, special mode for KS0078)
+ // REV=0 (Reverse normal, special mode for KS0078)
+ break;
+
default:
-//@TODO check config
- _writeCommand(0x28); // Function set 001 DL N F - -
- // 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)
-
+ // All other LCD types are initialised as 2 Line displays (including LCD16x1C and LCD40x4)
+ _writeCommand(0x28); // Function set 001 DL N RE(0) DH REV
+ // DL=0 (4 bits bus)
+ // Note: 4 bit mode is ignored for native SPI and I2C devices
+ // N=1 (2 lines)
+ // RE=0 (Dis. Extended Regs, special mode for KS0078)
+ // DH=0 (Disp shift=disable, special mode for KS0078)
+ // REV=0 (Reverse=Normal, special mode for KS0078)
+
break;
} // switch type
@@ -162,9 +238,8 @@
case LCD8x2B: //8x2B is a special case of 16x1
// case LCD12x1:
case LCD16x1:
+// case LCD20x1:
case LCD24x1:
-
-// _writeCommand(0x31); //FUNCTION SET 8 bit,N=0 1-line display mode,5*7dot, Select Instruction Set = 1
_writeCommand(0x21); //FUNCTION SET 4 bit, N=0 1-line display mode, 5*7dot, Select Instruction Set = 1
//Note: 4 bit mode is ignored for native SPI and I2C devices
@@ -178,16 +253,19 @@
_writeCommand(0x6C); //Follower control
wait_ms(10); // Wait 10ms to ensure powered up
-// _writeCommand(0x30); //FUNCTION SET 8 bit,N=0 1-line display mode,5*7dot, Return to Instruction Set = 0
_writeCommand(0x20); //FUNCTION SET 4 bit, N=0 1-line display mode, 5*7dot, Return to Instruction Set = 0
//Note: 4 bit mode is ignored for native SPI and I2C devices
+ break;
+ case LCD12x3D: // Special mode for PCF2116
+ case LCD12x3D1: // Special mode for PCF2116
+ case LCD12x4D: // Special mode for PCF2116
+ case LCD24x4D: // Special mode for KS0078
+ error("Error: LCD Controller type does not support this Display type\n\r");
break;
default:
// All other LCD types are initialised as 2 Line displays
-
-// _writeCommand(0x39); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Select Instruction Set = 1
_writeCommand(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
@@ -201,14 +279,12 @@
_writeCommand(0x6C); //Follower control
wait_ms(10); // Wait 10ms to ensure powered up
-// _writeCommand(0x38); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Return to Instruction Set = 0
_writeCommand(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
} // switch type
break; // case ST7032_3V3 Controller
-
case ST7032_5V:
// ST7032 controller: Disable Voltage booster for VLCD. VDD=5V
@@ -218,9 +294,8 @@
case LCD8x2B: //8x2B is a special case of 16x1
// case LCD12x1:
case LCD16x1:
+// case LCD20x1:
case LCD24x1:
-
-// _writeCommand(0x31); //FUNCTION SET 8 bit,N=0 1-line display mode,5*7dot, Select Instruction Set = 1
_writeCommand(0x21); //FUNCTION SET 4 bit, N=0 1-line display mode, 5*7dot, Select Instruction Set = 1
//Note: 4 bit mode is ignored for native SPI and I2C devices
@@ -234,16 +309,19 @@
_writeCommand(0x6C); //Follower control
wait_ms(10); // Wait 10ms to ensure powered up
-// _writeCommand(0x30); //FUNCTION SET 8 bit,N=0 1-line display mode,5*7dot, Return to Instruction Set = 0
_writeCommand(0x20); //FUNCTION SET 4 bit, N=0 1-line display mode, 5*7dot, Return to Instruction Set = 0
//Note: 4 bit mode is ignored for native SPI and I2C devices
+ break;
+ case LCD12x3D: // Special mode for PCF2116
+ case LCD12x3D1: // Special mode for PCF2116
+ case LCD12x4D: // Special mode for PCF2116
+ case LCD24x4D: // Special mode for KS0078
+ error("Error: LCD Controller type does not support this Display type\n\r");
break;
default:
// All other LCD types are initialised as 2 Line displays
-
-// _writeCommand(0x39); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Select Instruction Set = 1
_writeCommand(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
@@ -257,7 +335,6 @@
_writeCommand(0x6C); //Follower control
wait_ms(10); // Wait 10ms to ensure powered up
-// _writeCommand(0x38); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Return to Instruction Set = 0
_writeCommand(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
} // switch type
@@ -271,7 +348,7 @@
// Initialise Display configuration
switch (_type) {
case LCD8x1: //8x1 is a regular 1 line display
- case LCD8x2B: //8x2B is a special case of 16x1
+ case LCD8x2B: //8x2D is a special case of 16x1
// case LCD12x1:
case LCD16x1:
case LCD24x1:
@@ -307,8 +384,16 @@
wait_ms(50);
break;
#endif
+
+ case LCD12x3D: // Special mode for PCF2116
+ case LCD12x3D1: // Special mode for PCF2116
+ case LCD12x4D: // Special mode for PCF2116
+ case LCD24x4D: // Special mode for KS0078
+ error("Error: LCD Controller type does not support this Display type\n\r");
+ break;
+
default:
- // All other LCD types are initialised as 2 Line displays
+ // All other LCD types are initialised as 2 Line displays (including LCD16x1C and LCD40x4)
_writeCommand(0x29); // 4-bit Databus, N=1 2 Line, DH=0 5x7font, IS2,IS1 = 01 Select Instruction Set = 1
wait_ms(30); // > 26,3ms
_writeCommand(0x14); // Bias: 1/5, 2-Lines LCD
@@ -326,61 +411,118 @@
break; // case ST7036 Controller
- case PCF21XX_3V3:
- // PCF21XX controller: Initialise Voltage booster for VLCD. VDD=3V3
-
+ case PCF2113_3V3:
+ // PCF2113 controller: Initialise Voltage booster for VLCD. VDD=3V3
+ // Note1: The PCF21XX family of controllers has several types that dont have an onboard voltage generator for V-LCD.
+ // You must supply this LCD voltage externally and not enable VGen.
+ // Note2: The early versions of PCF2116 controllers (eg PCF2116C) can not generate sufficiently negative voltage for the LCD at a VDD of 3V3.
+ // You must supply this voltage externally and not enable VGen or you must use a higher VDD (e.g. 5V) and enable VGen.
+ // More recent versions of the controller (eg PCF2116K) have an improved VGen that will work with 3V3.
+ // Note3: See datasheet, members of the PCF21XX family support different numbers of rows/columns. Not all can support 3 or 4 rows.
+ // Note4: See datasheet, you can also disable VGen by connecting Vo to VDD. VLCD will then be used directly as LCD voltage.
+ // Note5: PCF2113 is different wrt to VLCD generator !
+ // Note6: See datasheet, the PCF21XX-C and PCF21XX-K use a non-standard character set. This may result is strange text when not corrected..
+
// Initialise Display configuration
switch (_type) {
- case LCD8x1: //8x1 is a regular 1 line display
- case LCD8x2B: //8x2B is a special case of 16x1
// case LCD12x1:
- case LCD16x1:
case LCD24x1:
- _writeCommand(0x22); //FUNCTION SET 4 bit, N=0/M=0 1-line/24 chars display mode, G=1 Booster on
+ _writeCommand(0x21); //FUNCTION SET 4 bit, M=0 1-line/24 chars display mode, extended IS
+ //Note: 4 bit mode is ignored for I2C mode
+ _writeCommand(0x9F); //Set VLCD A : VGen for Chars and Icons
+ _writeCommand(0xDF); //Set VLCD B : VGen for Icons Only
+ _writeCommand(0x20); //FUNCTION SET 4 bit, M=0 1-line/24 chars display mode
+// _writeCommand(0x24); //FUNCTION SET 4 bit, M=1 2-line/12 chars display mode, standard IS
+
+ wait_ms(10); // Wait 10ms to ensure powered up
+ break;
+
+//Tested OK for PCF2113
+//Note: PCF2113 is different wrt to VLCD generator !
+ case LCD12x2:
+ _writeCommand(0x21); //FUNCTION SET 4 bit, M=0 1-line/24 chars display mode, extended IS
+ //Note: 4 bit mode is ignored for I2C mode
+ _writeCommand(0x9F); //Set VLCD A : VGen for Chars and Icons
+ _writeCommand(0xDF); //Set VLCD B : VGen for Icons Only
+// _writeCommand(0x20); //FUNCTION SET 4 bit, M=0 1-line/24 chars display mode
+ _writeCommand(0x24); //FUNCTION SET 4 bit, M=1 2-line/12 chars display mode, standard IS
+
+ wait_ms(10); // Wait 10ms to ensure powered up
+ break;
+
+ default:
+ error("Error: LCD Controller type does not support this Display type\n\r");
+ break;
+
+ } // switch type
+
+ break; // case PCF2113_3V3 Controller
+
+
+
+ case PCF2116_3V3:
+ // PCF2116 controller: Initialise Voltage booster for VLCD. VDD=3V3
+ // Note1: The PCF21XX family of controllers has several types that dont have an onboard voltage generator for V-LCD.
+ // You must supply this LCD voltage externally and not enable VGen.
+ // Note2: The early versions of PCF2116 controllers (eg PCF2116C) can not generate sufficiently negative voltage for the LCD at a VDD of 3V3.
+ // You must supply this voltage externally and not enable VGen or you must use a higher VDD (e.g. 5V) and enable VGen.
+ // More recent versions of the controller (eg PCF2116K) have an improved VGen that will work with 3V3.
+ // Note3: See datasheet, members of the PCF21XX family support different numbers of rows/columns. Not all can support 3 or 4 rows.
+ // Note4: See datasheet, you can also disable VGen by connecting Vo to VDD. VLCD will then be used directly as LCD voltage.
+ // Note5: PCF2113 is different wrt to VLCD generator !
+ // Note6: See datasheet, the PCF21XX-C and PCF21XX-K use a non-standard character set. This may result is strange text when not corrected..
+
+ // Initialise Display configuration
+ switch (_type) {
+// case LCD12x1:
+// case LCD12x2:
+ case LCD24x1:
+ _writeCommand(0x22); //FUNCTION SET 4 bit, N=0/M=0 1-line/24 chars display mode, G=1 VGen on
//Note: 4 bit mode is ignored for I2C mode
wait_ms(10); // Wait 10ms to ensure powered up
break;
- case LCD12x3B:
- case LCD12x4B:
- _writeCommand(0x2E); //FUNCTION SET 4 bit, N=1/M=1 4-line/12 chars display mode, G=1 Booster on
+ case LCD12x3D:
+ case LCD12x3D1:
+ case LCD12x4D:
+ _writeCommand(0x2E); //FUNCTION SET 4 bit, N=1/M=1 4-line/12 chars display mode, G=1 VGen on
//Note: 4 bit mode is ignored for I2C mode
wait_ms(10); // Wait 10ms to ensure powered up
break;
-
- default:
- // All other LCD types are initialised as 2 Line displays
- _writeCommand(0x2A); //FUNCTION SET 4 bit, N=1/M=0 2-line/24 chars display mode, G=1 Booster on
+
+ case LCD24x2:
+ _writeCommand(0x2A); //FUNCTION SET 4 bit, N=1/M=0 2-line/24 chars display mode, G=1 VGen on
//Note: 4 bit mode is ignored for I2C mode
+ wait_ms(10); // Wait 10ms to ensure powered up
- wait_ms(10); // Wait 10ms to ensure powered up
-
-
- led1=!led1;
+ default:
+ error("Error: LCD Controller type does not support this Display type\n\r");
+ break;
+
} // switch type
-
- break; // case PCF21XX_3V3 Controller
-
+ break; // case PCF2116_3V3 Controller
// case PCF21XX_5V:
- // PCF21XX controller: No Voltage booster for VLCD. VDD=5V
-
+ // PCF21XX controller: No Voltage generator for VLCD. VDD=5V
+//@TODO
case WS0010:
// WS0010 OLED controller: Initialise DC/DC Voltage converter for LEDs
- // Note: supports 1 or 2 lines (and 16x100 graphics)
- // supports 4 fonts (English/Japanese (default), Western European-I, English/Russian, Western European-II)
+ // Note1: Identical to RS0010
+ // Note2: supports 1 or 2 lines (and 16x100 graphics)
+ // supports 4 fonts (English/Japanese (default), Western European-I, English/Russian, Western European-II)
// Cursor/Disp shift set 0001 SC RL 0 0
//
- // Mode en Power set 0001 GC PWR 1 1
+ // Mode and Power set 0001 GC PWR 1 1
// GC = 0 (Graph Mode=1, Char Mode=0)
- // PWR = (DC/DC On/Off)
-
+ // PWR = 1 (DC/DC On/Off)
+
+//@Todo: This may be needed to enable a warm reboot
//_writeCommand(0x13); // DC/DC off
+ //wait_ms(10); // Wait 10ms to ensure powered down
_writeCommand(0x17); // DC/DC on
- wait_ms(10); // Wait 10ms to ensure powered up
-
+ wait_ms(10); // Wait 10ms to ensure powered up
// Initialise Display configuration
switch (_type) {
@@ -388,21 +530,30 @@
case LCD8x2B: //8x2B is a special case of 16x1
// case LCD12x1:
case LCD16x1:
-// case LCD24x1:
- _writeCommand(0x20); // Function set 001 DL N F - -
- // DL=0 (4 bits bus)
- // N=0 (1 line)
- // F=0 (5x7 dots font)
+ case LCD24x1:
+ _writeCommand(0x20); // Function set 001 DL N F FT1 FT0
+ // DL=0 (4 bits bus)
+ // N=0 (1 line)
+ // F=0 (5x7 dots font)
+ // FT=00 (00 = Engl/Jap, 01 = WestEur1, 10 = Engl/Russian, 11 = WestEur2
+ break;
+
+ case LCD12x3D: // Special mode for PCF2116
+ case LCD12x3D1: // Special mode for PCF2116
+ case LCD12x4D: // Special mode for PCF2116
+ case LCD24x4D: // Special mode for KS0078
+ error("Error: LCD Controller type does not support this Display type\n\r");
break;
default:
- // All other LCD types are initialised as 2 Line displays (including LCD40x4)
- _writeCommand(0x28); // Function set 001 DL N F - -
- // DL=0 (4 bits bus)
- // N=1 (2 lines)
- // F=0 (5x7 dots font, only option for 2 line display)
- // - (Don't care)
-
+ // All other LCD types are initialised as 2 Line displays (including LCD16x1C and LCD40x4)
+ _writeCommand(0x28); // Function set 001 DL N F FT1 FT0
+ // DL=0 (4 bits bus)
+ // N=1 (2 lines)
+ // F=0 (5x7 dots font)
+ // FT=00 (00 = Engl/Jap, 01 = WestEur1, 10 = Engl/Russian, 11 = WestEur2
+
+
break;
} // switch type
@@ -417,14 +568,25 @@
case LCD8x2B: //8x2B is a special case of 16x1
// case LCD12x1:
case LCD16x1:
+// case LCD20x1:
case LCD24x1:
+// case LCD40x1:
_writeCommand(0x20); // Function set 001 DL N F - -
// DL=0 (4 bits bus)
// N=0 (1 line)
// F=0 (5x7 dots font)
break;
- // All other LCD types are initialised as 2 Line displays (including LCD40x4)
+
+// case LCD12x3D: // Special mode for PCF2116
+// case LCD12x3D1: // Special mode for PCF2116
+// case LCD12x4D: // Special mode for PCF2116
+// case LCD24x3D: // Special mode for KS0078
+ case LCD24x4D: // Special mode for KS0078
+ error("Error: LCD Controller type does not support this Display type\n\r");
+ break;
+
+ // All other LCD types are initialised as 2 Line displays (including LCD16x1C and LCD40x4)
default:
_writeCommand(0x28); // Function set 001 DL N F - -
// DL=0 (4 bits bus)
@@ -441,8 +603,7 @@
} // switch Controller specific initialisations
- // Controller general initialisations
-
+ // Controller general initialisations
_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
@@ -460,12 +621,10 @@
// R/L=1 Right
//
-
// _writeCommand(0x0C); // Display Ctrl 0000 1 D C B
// // Display On, Cursor Off, Blink Off
setCursor(CurOff_BlkOff);
setMode(DispOn);
- led2=!led2;
}
@@ -499,7 +658,7 @@
}
setAddress(0, 0); // Reset Cursor location
- // Note: this is needed because some rare displays (eg PCF21XX) don't use line 0 in the '3 Line' mode.
+ // Note: this is needed because some displays (eg PCF21XX) don't use line 0 in the '3 Line' mode.
}
/** Locate cursor to a screen column and row
@@ -517,7 +676,7 @@
setAddress(column, row);
}
-
+
/** Write a single character (Stream implementation)
*/
@@ -574,7 +733,6 @@
wait_us(1); // Datahold time
// Enable is Low
-
}
@@ -654,6 +812,7 @@
return 0x80 | getAddress(column, row);
}
+#if(0)
// This is new method to return the memory address based on row, column and displaytype.
//
/** Return the memoryaddress of screen column and row location
@@ -661,12 +820,18 @@
* @param column The horizontal position from the left, indexed from 0
* @param row The vertical position from the top, indexed from 0
* @param return The memoryaddress of screen column and row location
+ *
+ * Note: some configurations are commented out because they have not yet been tested due to lack of hardware
*/
int TextLCD_Base::getAddress(int column, int row) {
switch (_type) {
case LCD8x1:
- case LCD24x1:
+// case LCD12x1:
+// case LCD16x1B:
+// case LCD20x1:
+ case LCD24x1:
+// case LCD40x1:
return 0x00 + column;
case LCD16x1:
@@ -676,7 +841,7 @@
else
return 0x40 + (column - 8);
- case LCD8x2B:
+ case LCD8x2D:
// LCD8x2B is a special layout of LCD16x1
if (row==0)
return 0x00 + column;
@@ -702,6 +867,7 @@
// Special mode for PCF2116
case LCD12x3B:
+ //Display bottom three rows of four
switch (row) {
case 0:
return 0x20 + column;
@@ -711,6 +877,19 @@
return 0x60 + column;
}
+#if(0)
+ case LCD12x3C:
+ //Display top three rows of four
+ switch (row) {
+ case 0:
+ return 0x00 + column;
+ case 1:
+ return 0x20 + column;
+ case 2:
+ return 0x40 + column;
+ }
+#endif
+
case LCD12x4:
switch (row) {
case 0:
@@ -815,6 +994,143 @@
}
}
+#else
+
+//Test of Addressing Mode encoded in LCDType
+
+// This is new method to return the memory address based on row, column and displaytype.
+//
+/** Return the memoryaddress of screen column and row location
+ *
+ * @param column The horizontal position from the left, indexed from 0
+ * @param row The vertical position from the top, indexed from 0
+ * @param return The memoryaddress of screen column and row location
+ *
+ * Note: some configurations are commented out because they have not yet been tested due to lack of hardware
+ */
+int TextLCD_Base::getAddress(int column, int row) {
+
+ switch (_addr_mode) {
+
+ case LCD_T_A:
+ //Default addressing mode for 1, 2 and 4 rows (except 40x4)
+ //The two available rows are split and stacked on top of eachother. Addressing for 3rd and 4th line continues where lines 1 and 2 were split.
+ //Displays top rows when less than four are used.
+ switch (row) {
+ case 0:
+ return 0x00 + column;
+ case 1:
+ return 0x40 + column;
+ case 2:
+ return 0x00 + _nr_cols + column;
+ case 3:
+ return 0x40 + _nr_cols + column;
+ // Should never get here.
+ default:
+ return 0x00;
+ }
+
+ case LCD_T_B:
+ // LCD8x2B is a special layout of LCD16x1
+ if (row==0)
+ return 0x00 + column;
+ else
+// return _nr_cols + column;
+ return 0x08 + column;
+
+ case LCD_T_C:
+ // LCD16x1C is a special layout of LCD8x2
+ if (column<8)
+ return 0x00 + column;
+ else
+ return 0x40 + (column - 8);
+
+// Not sure about this one, seems wrong.
+// Left in for compatibility with original library
+// case LCD16x2B:
+// return 0x00 + (row * 40) + column;
+
+
+ case LCD_T_D:
+ //Alternate addressing mode for 3 and 4 row displays (except 40x4). Used by PCF21XX, KS0078
+ //The 4 available rows start at a hardcoded address.
+ //Displays top rows when less than four are used.
+ switch (row) {
+ case 0:
+ return 0x00 + column;
+ case 1:
+ return 0x20 + column;
+ case 2:
+ return 0x40 + column;
+ case 3:
+ return 0x60 + column;
+ // Should never get here.
+ default:
+ return 0x00;
+ }
+
+ case LCD_T_D1:
+ //Alternate addressing mode for 3 row displays. Used by PCF21XX, KS0078
+ //The 4 available rows start at a hardcoded address.
+ //Skips top row of 4 row display and starts display at row 1
+ switch (row) {
+ case 0:
+ return 0x20 + column;
+ case 1:
+ return 0x40 + column;
+ case 2:
+ return 0x60 + column;
+ // Should never get here.
+ default:
+ return 0x00;
+ }
+
+ case LCD_T_E:
+ // LCD40x4 is a special case since it has 2 controllers.
+ // Each controller is configured as 40x2 (Type A)
+ if (row<2) {
+ // Test to see if we need to switch between controllers
+ if (_ctrl_idx != _LCDCtrl_0) {
+
+ // Second LCD controller Cursor Off
+ _setCursorAndDisplayMode(_currentMode, CurOff_BlkOff);
+
+ // Select primary controller
+ _ctrl_idx = _LCDCtrl_0;
+
+ // Restore cursormode on primary LCD controller
+ _setCursorAndDisplayMode(_currentMode, _currentCursor);
+ }
+
+ return 0x00 + (row * 0x40) + column;
+ }
+ else {
+
+ // Test to see if we need to switch between controllers
+ if (_ctrl_idx != _LCDCtrl_1) {
+ // Primary LCD controller Cursor Off
+ _setCursorAndDisplayMode(_currentMode, CurOff_BlkOff);
+
+ // Select secondary controller
+ _ctrl_idx = _LCDCtrl_1;
+
+ // Restore cursormode on secondary LCD controller
+ _setCursorAndDisplayMode(_currentMode, _currentCursor);
+ }
+
+ return 0x00 + ((row-2) * 0x40) + column;
+ }
+
+ // Should never get here.
+ default:
+ return 0x00;
+ }
+}
+
+
+#endif
+
+
/** Set the memoryaddress of screen column and row location
*
@@ -852,8 +1168,16 @@
/** Return the number of columns
*
* @param return The number of columns
+ *
+ * Note: some configurations are commented out because they have not yet been tested due to lack of hardware
*/
int TextLCD_Base::columns() {
+
+ // Columns encoded in b7..b0
+ //return (_type & 0xFF);
+ return _nr_cols;
+
+#if(0)
switch (_type) {
case LCD8x1:
case LCD8x2:
@@ -862,6 +1186,7 @@
case LCD12x2:
case LCD12x3B:
+// case LCD12x3C:
case LCD12x4:
case LCD12x4B:
return 12;
@@ -873,15 +1198,18 @@
case LCD16x4:
return 16;
+// case LCD20x1:
case LCD20x2:
case LCD20x4:
return 20;
case LCD24x1:
case LCD24x2:
+// case LCD24x3B:
case LCD24x4B:
return 24;
+// case LCD40x1:
case LCD40x2:
case LCD40x4:
return 40;
@@ -890,17 +1218,28 @@
default:
return 0;
}
+#endif
}
/** Return the number of rows
*
* @param return The number of rows
+ *
+ * Note: some configurations are commented out because they have not yet been tested due to lack of hardware
*/
int TextLCD_Base::rows() {
+
+ // Rows encoded in b15..b8
+ //return ((_type >> 8) & 0xFF);
+ return _nr_rows;
+
+#if(0)
switch (_type) {
case LCD8x1:
case LCD16x1:
+// case LCD20x1:
case LCD24x1:
+// case LCD40x1:
return 1;
case LCD8x2:
@@ -914,7 +1253,9 @@
return 2;
case LCD12x3B:
+// case LCD12x3C:
// case LCD16x3:
+// case LCD24x3B:
return 3;
case LCD12x4:
@@ -929,6 +1270,7 @@
default:
return 0;
}
+#endif
}
/** Set the Cursormode
@@ -981,14 +1323,12 @@
// Configure secondary LCD controller
_setCursorAndDisplayMode(_currentMode, _currentCursor);
-
}
}
else {
// Configure primary LCD controller
_setCursorAndDisplayMode(_currentMode, _currentCursor);
- }
-
+ }
}
@@ -1000,7 +1340,6 @@
_writeCommand(0x08 | displayMode | cursorType);
}
-
/** Set the Backlight mode
*
* @param backlightMode The Backlight mode (LightOff, LightOn)
@@ -1062,14 +1401,12 @@
//Select DD RAM again for current LCD controller
int addr = getAddress(_column, _row);
- _writeCommand(0x80 | addr);
-
+ _writeCommand(0x80 | addr);
}
//--------- End TextLCD_Base -----------
-
//--------- Start TextLCD Bus -----------
/* Create a TextLCD interface for using regular mbed pins
@@ -1109,10 +1446,8 @@
}
_init();
-
}
-
/** Destruct a TextLCD interface for using regular mbed pins
*
* @param none
@@ -1148,7 +1483,6 @@
if (_e2 != NULL) {_e2->write(0);} //Reset E2 bit
}
}
-
}
// Set RS pin
@@ -1161,7 +1495,6 @@
else {
_rs = 0; // Reset RS bit
}
-
}
/** Set BL pin
@@ -1186,7 +1519,6 @@
void TextLCD::_setData(int value) {
_d = value & 0x0F; // Write Databits
}
-
//----------- End TextLCD ---------------
@@ -1206,12 +1538,10 @@
_slaveAddress = deviceAddress & 0xFE;
-
// Setup the I2C bus
// The max bitrate for PCF8574 is 100kbit, the max bitrate for MCP23008 is 400kbit,
// _i2c->frequency(100000);
-
#if (MCP23008==1)
// MCP23008 portexpander Init
_write_register(IODIR, 0x00); // All outputs
@@ -1241,8 +1571,7 @@
_i2c->write(_slaveAddress, &_lcd_bus, 1);
#endif
- _init();
-
+ _init();
}
// Set E pin (or E2 pin)
@@ -1266,7 +1595,6 @@
}
}
-
#if (MCP23008==1)
// MCP23008 portexpander
@@ -1291,7 +1619,6 @@
_lcd_bus &= ~D_LCD_RS; // Reset RS bit
}
-
#if (MCP23008==1)
// MCP23008 portexpander
@@ -1302,8 +1629,7 @@
// write the new data to the I2C portexpander
_i2c->write(_slaveAddress, &_lcd_bus, 1);
-#endif
-
+#endif
}
// Set BL pin
@@ -1327,12 +1653,10 @@
// write the new data to the I2C portexpander
_i2c->write(_slaveAddress, &_lcd_bus, 1);
-#endif
-
+#endif
}
-
// Place the 4bit data on the databus
// Used for mbed pins, I2C bus expander or SPI shifregister
void TextLCD_I2C::_setData(int value) {
@@ -1387,8 +1711,7 @@
void TextLCD_I2C::_write_register (int reg, int value) {
char data[] = {reg, value};
- _i2c->write(_slaveAddress, data, 2);
-
+ _i2c->write(_slaveAddress, data, 2);
}
//---------- End TextLCD_I2C ------------
@@ -1407,15 +1730,14 @@
TextLCD_I2C_N::TextLCD_I2C_N(I2C *i2c, char deviceAddress, LCDType type, PinName bl, LCDCtrl ctrl) :
TextLCD_Base(type, ctrl),
_i2c(i2c){
-
+
_slaveAddress = deviceAddress & 0xFE;
// Setup the I2C bus
// The max bitrate for ST7032i is 400kbit, lets stick to default here
_i2c->frequency(100000);
// _i2c->frequency(50000);
-
-
+
// The hardware Backlight pin is optional. Test and make sure whether it exists or not to prevent illegal access.
if (bl != NC) {
_bl = new DigitalOut(bl); //Construct new pin
@@ -1426,7 +1748,29 @@
_bl = NULL; //Construct dummy pin
}
- _init();
+#if(0)
+ //Sanity check
+ switch (_ctrl) {
+ case ST7032_3V3:
+ case ST7032_5V:
+ case PCF21XX_3V3:
+// case PCF21XX_5V:
+ _init();
+ break;
+
+ default:
+ error("Error: LCD Controller type does not support native I2C interface\n\r");
+ }
+#endif
+
+ //Sanity check
+ if (_ctrl & LCD_C_I2C) {
+ _init();
+ }
+ else {
+ error("Error: LCD Controller type does not support native I2C interface\n\r");
+ }
+
}
TextLCD_I2C_N::~TextLCD_I2C_N() {
@@ -1440,7 +1784,16 @@
// Set RS pin
// Used for mbed pins, I2C bus expander or SPI shiftregister and native I2C or SPI
void TextLCD_I2C_N::_setRS(bool value) {
-
+// The controlbyte defines the meaning of the next byte. This next byte can either be data or command.
+// Start Slaveaddress+RW b7 b6 b5 b4 b3 b2 b1 b0 b7...........b0 Stop
+// Co RS RW 0 0 0 0 0 command or data
+//
+// C0=1 indicates that another controlbyte will follow after the next data or command byte
+// RS=1 means that next byte is data, RS=0 means that next byte is command
+// RW=0 means write to controller. RW=1 means that controller will be read from after the next command.
+// Many native I2C controllers dont support this option and it is not used by this lib.
+//
+
if (value) {
_controlbyte = 0x40; // Next byte is data, No more control bytes will follow
}
@@ -1455,28 +1808,30 @@
_bl->write(value);
}
}
-
// Not used in this mode
void TextLCD_I2C_N::_setData(int value) {
}
-
// Write a byte using I2C
void TextLCD_I2C_N::_writeByte(int value) {
-
+// The controlbyte defines the meaning of the next byte. This next byte can either be data or command.
+// Start Slaveaddress+RW b7 b6 b5 b4 b3 b2 b1 b0 b7...........b0 Stop
+// Co RS RW 0 0 0 0 0 command or data
+//
+// C0=1 indicates that another controlbyte will follow after the next data or command byte
+// RS=1 means that next byte is data, RS=0 means that next byte is command
+// RW=0 means write to controller. RW=1 means that controller will be read from after the next command.
+// Many native I2C controllers dont support this option and it is not used by this lib.
+//
char data[] = {_controlbyte, value};
- _i2c->write(_slaveAddress, data, 2);
-
+ _i2c->write(_slaveAddress, data, 2);
}
-
//-------- End TextLCD_I2C_N ------------
-
-
//--------- Start TextLCD_SPI -----------
/** Create a TextLCD interface using an SPI 74595 portexpander
@@ -1497,7 +1852,6 @@
_spi->frequency(500000);
//_spi.frequency(1000000);
-
// Init the portexpander bus
_lcd_bus = D_LCD_BUS_DEF;
@@ -1505,9 +1859,8 @@
_setCS(false);
_spi->write(_lcd_bus);
_setCS(true);
-
- _init();
-
+
+ _init();
}
// Set E pin (or E2 pin)
@@ -1534,8 +1887,7 @@
// write the new data to the SPI portexpander
_setCS(false);
_spi->write(_lcd_bus);
- _setCS(true);
-
+ _setCS(true);
}
// Set RS pin
@@ -1553,7 +1905,6 @@
_setCS(false);
_spi->write(_lcd_bus);
_setCS(true);
-
}
// Set BL pin
@@ -1570,11 +1921,9 @@
// write the new data to the SPI portexpander
_setCS(false);
_spi->write(_lcd_bus);
- _setCS(true);
-
+ _setCS(true);
}
-
// Place the 4bit data on the databus
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_SPI::_setData(int value) {
@@ -1614,11 +1963,9 @@
// write the new data to the SPI portexpander
_setCS(false);
_spi->write(_lcd_bus);
- _setCS(true);
-
+ _setCS(true);
}
-
// Set CS line.
// Only used for SPI bus
void TextLCD_SPI::_setCS(bool value) {
@@ -1636,7 +1983,7 @@
//--------- Start TextLCD_SPI_N ---------
- /** Create a TextLCD interface using a controller with a native SPI interface
+ /** Create a TextLCD interface using a controller with a native SPI4 interface
*
* @param spi SPI Bus
* @param cs chip select pin (active low)
@@ -1665,8 +2012,28 @@
// No Hardware Backlight pin
_bl = NULL; //Construct dummy pin
}
-
- _init();
+
+#if(0)
+ //Sanity check
+ switch (_ctrl) {
+ case ST7032_3V3:
+ case ST7032_5V:
+ case WS0010:
+ _init();
+ break;
+
+ default:
+ error("Error: LCD Controller type does not support native SPI4 interface\n\r");
+ }
+#endif
+
+ //Sanity check
+ if (_ctrl & LCD_C_SPI4) {
+ _init();
+ }
+ else {
+ error("Error: LCD Controller type does not support native SPI4 interface\n\r");
+ }
}
TextLCD_SPI_N::~TextLCD_SPI_N() {
@@ -1694,7 +2061,6 @@
void TextLCD_SPI_N::_setData(int value) {
}
-
// Write a byte using SPI
void TextLCD_SPI_N::_writeByte(int value) {
_cs = 0;
@@ -1703,12 +2069,193 @@
wait_us(1);
_cs = 1;
}
-
-
-
+
//-------- End TextLCD_SPI_N ------------
+#if(0)
+//Code checked out on logic analyser. Not yet tested on hardware..
+
+//-------- Start TextLCD_SPI_N_3_9 --------
+
+ /** Create a TextLCD interface using a controller with a native SPI3 9 bits interface
+ *
+ * @param spi SPI Bus
+ * @param cs chip select pin (active low)
+ * @param type Sets the panel size/addressing mode (default = LCD16x2)
+ * @param bl Backlight control line (optional, default = NC)
+ * @param ctrl LCD controller (default = AIP31068)
+ */
+TextLCD_SPI_N_3_9::TextLCD_SPI_N_3_9(SPI *spi, PinName cs, LCDType type, PinName bl, LCDCtrl ctrl) :
+ TextLCD_Base(type, ctrl),
+ _spi(spi),
+ _cs(cs) {
+
+ // Setup the spi for 9 bit data, low steady state clock,
+ // rising edge capture, with a 500KHz or 1MHz clock rate
+ _spi->format(9,0);
+ _spi->frequency(1000000);
+
+ // The hardware Backlight pin is optional. Test and make sure whether it exists or not to prevent illegal access.
+ if (bl != NC) {
+ _bl = new DigitalOut(bl); //Construct new pin
+ _bl->write(0); //Deactivate
+ }
+ else {
+ // No Hardware Backlight pin
+ _bl = NULL; //Construct dummy pin
+ }
+
+ //Sanity check
+ if (_ctrl & LCD_C_SPI3_9) {
+ _init();
+ }
+ else {
+ error("Error: LCD Controller type does not support native SPI3 9 bits interface\n\r");
+ }
+}
+
+TextLCD_SPI_N_3_9::~TextLCD_SPI_N_3_9() {
+ if (_bl != NULL) {delete _bl;} // BL pin
+}
+
+// Not used in this mode
+void TextLCD_SPI_N_3_9::_setEnable(bool value) {
+}
+
+// Set RS pin
+// Used for mbed pins, I2C bus expander or SPI shiftregister
+void TextLCD_SPI_N_3_9::_setRS(bool value) {
+// The controlbits define the meaning of the next byte. This next byte can either be data or command.
+// b8 b7...........b0
+// RS command or data
+//
+// RS=1 means that next byte is data, RS=0 means that next byte is command
+//
+
+ if (value) {
+ _controlbyte = 0x01; // Next byte is data
+ }
+ else {
+ _controlbyte = 0x00; // Next byte is command
+ }
+
+}
+
+// Set BL pin
+void TextLCD_SPI_N_3_9::_setBL(bool value) {
+ if (_bl) {
+ _bl->write(value);
+ }
+}
+
+// Not used in this mode
+void TextLCD_SPI_N_3_9::_setData(int value) {
+}
+
+// Write a byte using SPI3 9 bits mode
+void TextLCD_SPI_N_3_9::_writeByte(int value) {
+ _cs = 0;
+ wait_us(1);
+ _spi->write( (_controlbyte << 8) | (value & 0xFF));
+ wait_us(1);
+ _cs = 1;
+}
+
+//------- End TextLCD_SPI_N_3_9 -----------
+#endif
+#if(0)
+//Code checked out on logic analyser. Not yet tested on hardware..
+
+//------- Start TextLCD_SPI_N_3_10 --------
+
+ /** Create a TextLCD interface using a controller with a native SPI3 10 bits interface
+ *
+ * @param spi SPI Bus
+ * @param cs chip select pin (active low)
+ * @param type Sets the panel size/addressing mode (default = LCD16x2)
+ * @param bl Backlight control line (optional, default = NC)
+ * @param ctrl LCD controller (default = AIP31068)
+ */
+TextLCD_SPI_N_3_10::TextLCD_SPI_N_3_10(SPI *spi, PinName cs, LCDType type, PinName bl, LCDCtrl ctrl) :
+ TextLCD_Base(type, ctrl),
+ _spi(spi),
+ _cs(cs) {
+
+ // Setup the spi for 10 bit data, low steady state clock,
+ // rising edge capture, with a 500KHz or 1MHz clock rate
+ _spi->format(10,0);
+ _spi->frequency(1000000);
+
+ // The hardware Backlight pin is optional. Test and make sure whether it exists or not to prevent illegal access.
+ if (bl != NC) {
+ _bl = new DigitalOut(bl); //Construct new pin
+ _bl->write(0); //Deactivate
+ }
+ else {
+ // No Hardware Backlight pin
+ _bl = NULL; //Construct dummy pin
+ }
+
+ //Sanity check
+ if (_ctrl & LCD_C_SPI3_10) {
+ _init();
+ }
+ else {
+ error("Error: LCD Controller type does not support native SPI3 10 bits interface\n\r");
+ }
+}
+
+TextLCD_SPI_N_3_10::~TextLCD_SPI_N_3_10() {
+ if (_bl != NULL) {delete _bl;} // BL pin
+}
+
+// Not used in this mode
+void TextLCD_SPI_N_3_10::_setEnable(bool value) {
+}
+
+// Set RS pin
+// Used for mbed pins, I2C bus expander or SPI shiftregister
+void TextLCD_SPI_N_3_10::_setRS(bool value) {
+// The controlbits define the meaning of the next byte. This next byte can either be data or command.
+// b9 b8 b7...........b0
+// RS RW command or data
+//
+// RS=1 means that next byte is data, RS=0 means that next byte is command
+// RW=0 means that next byte is writen, RW=1 means that next byte is read (not used in this lib)
+//
+
+ if (value) {
+ _controlbyte = 0x02; // Next byte is data
+ }
+ else {
+ _controlbyte = 0x00; // Next byte is command
+ }
+
+}
+
+// Set BL pin
+void TextLCD_SPI_N_3_10::_setBL(bool value) {
+ if (_bl) {
+ _bl->write(value);
+ }
+}
+
+// Not used in this mode
+void TextLCD_SPI_N_3_10::_setData(int value) {
+}
+
+// Write a byte using SPI3 10 bits mode
+void TextLCD_SPI_N_3_10::_writeByte(int value) {
+ _cs = 0;
+ wait_us(1);
+ _spi->write( (_controlbyte << 8) | (value & 0xFF));
+ wait_us(1);
+ _cs = 1;
+}
+
+//------- End TextLCD_SPI_N_3_10 ----------
+#endif
\ No newline at end of file
HD44780 and compatible Text LCD controllers (4bit, I2C or SPI I/F)