diff options
Diffstat (limited to 'protocol/usb_hid/USB_Host_Shield_2.0/max_LCD.cpp')
m--------- | protocol/usb_hid/USB_Host_Shield_2.0 | 0 | ||||
-rw-r--r-- | protocol/usb_hid/USB_Host_Shield_2.0/max_LCD.cpp | 255 |
2 files changed, 255 insertions, 0 deletions
diff --git a/protocol/usb_hid/USB_Host_Shield_2.0 b/protocol/usb_hid/USB_Host_Shield_2.0 deleted file mode 160000 -Subproject 7c2e6c1bcdcc22cfdbd82edd9d8fc4c4276ead4 diff --git a/protocol/usb_hid/USB_Host_Shield_2.0/max_LCD.cpp b/protocol/usb_hid/USB_Host_Shield_2.0/max_LCD.cpp new file mode 100644 index 0000000000..f0c64666fa --- /dev/null +++ b/protocol/usb_hid/USB_Host_Shield_2.0/max_LCD.cpp @@ -0,0 +1,255 @@ +/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved. + +This software may be distributed and modified under the terms of the GNU +General Public License version 2 (GPL2) as published by the Free Software +Foundation and appearing in the file GPL2.TXT included in the packaging of +this file. Please note that GPL2 Section 2[b] requires that all works based +on this software must also be made publicly available under the terms of +the GPL2 ("Copyleft"). + +Contact information +------------------- + +Circuits At Home, LTD +Web : http://www.circuitsathome.com +e-mail : support@circuitsathome.com + */ +#include "max_LCD.h" +#include <string.h> + +// pin definition and set/clear + +#define RS 0x04 // RS pin +#define E 0x08 // E pin + +#define SET_RS lcdPins |= RS +#define CLR_RS lcdPins &= ~RS +#define SET_E lcdPins |= E +#define CLR_E lcdPins &= ~E + +#define SENDlcdPins() pUsb->gpioWr( lcdPins ) + +#define LCD_sendcmd(a) { CLR_RS; \ + sendbyte(a); \ + } + +#define LCD_sendchar(a) { SET_RS; \ + sendbyte(a); \ + } + +static byte lcdPins; //copy of LCD pins + +Max_LCD::Max_LCD(USB *pusb) : pUsb(pusb) { + lcdPins = 0; +} + +void Max_LCD::init() { + _displayfunction = LCD_4BITMODE | LCD_1LINE | LCD_5x8DOTS; + + // MAX3421E::gpioWr(0x55); + + begin(16, 1); +} + +void Max_LCD::begin(uint8_t cols, uint8_t lines, uint8_t dotsize) { + if(lines > 1) { + _displayfunction |= LCD_2LINE; + } + _numlines = lines; + _currline = 0; + + // for some 1 line displays you can select a 10 pixel high font + if((dotsize != 0) && (lines == 1)) { + _displayfunction |= LCD_5x10DOTS; + } + + // SEE PAGE 45/46 FOR INITIALIZATION SPECIFICATION! + // according to datasheet, we need at least 40ms after power rises above 2.7V + // before sending commands. Arduino can turn on way befer 4.5V so we'll wait 50 + delayMicroseconds(50000); + lcdPins = 0x30; + SET_E; + SENDlcdPins(); + CLR_E; + SENDlcdPins(); + delayMicroseconds(10000); // wait min 4.1ms + //second try + SET_E; + SENDlcdPins(); + CLR_E; + SENDlcdPins(); + delayMicroseconds(10000); // wait min 4.1ms + // third go! + SET_E; + SENDlcdPins(); + CLR_E; + SENDlcdPins(); + delayMicroseconds(10000); + // finally, set to 4-bit interface + lcdPins = 0x20; + //SET_RS; + SET_E; + SENDlcdPins(); + //CLR_RS; + CLR_E; + SENDlcdPins(); + delayMicroseconds(10000); + // finally, set # lines, font size, etc. + command(LCD_FUNCTIONSET | _displayfunction); + + // turn the display on with no cursor or blinking default + _displaycontrol = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF; + display(); + + // clear it off + clear(); + + // Initialize to default text direction (for romance languages) + _displaymode = LCD_ENTRYLEFT | LCD_ENTRYSHIFTDECREMENT; + // set the entry mode + command(LCD_ENTRYMODESET | _displaymode); +} + +/********** high level commands, for the user! */ +void Max_LCD::clear() { + command(LCD_CLEARDISPLAY); // clear display, set cursor position to zero + delayMicroseconds(2000); // this command takes a long time! +} + +void Max_LCD::home() { + command(LCD_RETURNHOME); // set cursor position to zero + delayMicroseconds(2000); // this command takes a long time! +} + +void Max_LCD::setCursor(uint8_t col, uint8_t row) { + int row_offsets[] = {0x00, 0x40, 0x14, 0x54}; + if(row > _numlines) { + row = _numlines - 1; // we count rows starting w/0 + } + + command(LCD_SETDDRAMADDR | (col + row_offsets[row])); +} + +// Turn the display on/off (quickly) + +void Max_LCD::noDisplay() { + _displaycontrol &= ~LCD_DISPLAYON; + command(LCD_DISPLAYCONTROL | _displaycontrol); +} + +void Max_LCD::display() { + _displaycontrol |= LCD_DISPLAYON; + command(LCD_DISPLAYCONTROL | _displaycontrol); +} + +// Turns the underline cursor on/off + +void Max_LCD::noCursor() { + _displaycontrol &= ~LCD_CURSORON; + command(LCD_DISPLAYCONTROL | _displaycontrol); +} + +void Max_LCD::cursor() { + _displaycontrol |= LCD_CURSORON; + command(LCD_DISPLAYCONTROL | _displaycontrol); +} + + +// Turn on and off the blinking cursor + +void Max_LCD::noBlink() { + _displaycontrol &= ~LCD_BLINKON; + command(LCD_DISPLAYCONTROL | _displaycontrol); +} + +void Max_LCD::blink() { + _displaycontrol |= LCD_BLINKON; + command(LCD_DISPLAYCONTROL | _displaycontrol); +} + +// These commands scroll the display without changing the RAM + +void Max_LCD::scrollDisplayLeft(void) { + command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVELEFT); +} + +void Max_LCD::scrollDisplayRight(void) { + command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVERIGHT); +} + +// This is for text that flows Left to Right + +void Max_LCD::leftToRight(void) { + _displaymode |= LCD_ENTRYLEFT; + command(LCD_ENTRYMODESET | _displaymode); +} + +// This is for text that flows Right to Left + +void Max_LCD::rightToLeft(void) { + _displaymode &= ~LCD_ENTRYLEFT; + command(LCD_ENTRYMODESET | _displaymode); +} + +// This will 'right justify' text from the cursor + +void Max_LCD::autoscroll(void) { + _displaymode |= LCD_ENTRYSHIFTINCREMENT; + command(LCD_ENTRYMODESET | _displaymode); +} + +// This will 'left justify' text from the cursor + +void Max_LCD::noAutoscroll(void) { + _displaymode &= ~LCD_ENTRYSHIFTINCREMENT; + command(LCD_ENTRYMODESET | _displaymode); +} + +// Allows us to fill the first 8 CGRAM locations +// with custom characters + +void Max_LCD::createChar(uint8_t location, uint8_t charmap[]) { + location &= 0x7; // we only have 8 locations 0-7 + command(LCD_SETCGRAMADDR | (location << 3)); + for(int i = 0; i < 8; i++) { + write(charmap[i]); + } +} + +/*********** mid level commands, for sending data/cmds */ + +inline void Max_LCD::command(uint8_t value) { + LCD_sendcmd(value); + delayMicroseconds(100); +} + +#if defined(ARDUINO) && ARDUINO >=100 + +inline size_t Max_LCD::write(uint8_t value) { + LCD_sendchar(value); + return 1; // Assume success +} +#else + +inline void Max_LCD::write(uint8_t value) { + LCD_sendchar(value); +} +#endif + +void Max_LCD::sendbyte(uint8_t val) { + lcdPins &= 0x0f; //prepare place for the upper nibble + lcdPins |= (val & 0xf0); //copy upper nibble to LCD variable + SET_E; //send + SENDlcdPins(); + delayMicroseconds(2); + CLR_E; + delayMicroseconds(2); + SENDlcdPins(); + lcdPins &= 0x0f; //prepare place for the lower nibble + lcdPins |= (val << 4) & 0xf0; //copy lower nibble to LCD variable + SET_E; //send + SENDlcdPins(); + CLR_E; + SENDlcdPins(); + delayMicroseconds(100); +} |