Diff: Sed133xLCD.h

Revision:

6:2f8aed3d2be4

Child:

7:d79600310cfe

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Sed133xLCD.h	Sat Jan 29 20:48:08 2011 +0000
@@ -0,0 +1,166 @@
+// mbed Sed133xLCD Library Base Class
+// Based on TextLCD (Copyright (c) 2007-2009 sford)
+// Released under the MIT License: http://mbed.org/license/mit
+// Author: louis Lagendijk
+//
+//
+#include "TextDisplays.h"
+
+#ifndef MBED_Sed133xLCD_H
+#define MBED_Sed133xLCD_H
+
+    enum dataType_t {
+        t_data = 0,
+        t_command = 1
+    };
+
+    enum command_t {
+        NO_COMMAND = 0,
+        SYSTEM_SET = 0x40,
+        SET_MEM = 0x42,
+        GET_MEM = 0x43,
+        SCROLL_SET = 0x44,
+        SET_CURSOR = 0x46,
+        GET_CURSOR = 0x47,
+        CURSOR_DIR_RIGHT = 0x4c,
+        CURSOR_DIR_LEFT = 0x4d,
+        CURSOR_DIR_UP = 0x4e,
+        CURSOR_DIR_DOWN = 0x4f,
+        SLEEP_IN = 0x53,
+        DISPLAY_OFF = 0x58,
+        DISPLAY_ON = 0x59,
+        HORIZONTAL_SCROLL_POSITION = 0x5a,
+        OVERLAY_FORMAT = 0x5b,
+        CHAR_GEN_RAM_ADDR = 0x5c,
+        CURSOR_FORM = 0x5d
+    };
+
+    struct commandName_t {
+        command_t value;
+        char *text;
+    };
+
+/** Sed133xLCD Textdisplay
+ * 
+ * Supports SED1330 (and probably the SED1335 and SED1336).
+ * Based on datasheet 268-0.4
+
+ *This code drives the display using the 8080 interface:
+ *     SEL1 = 0
+ *     SEL2 = 0
+ * These things require a lot of pins:
+ * 8 bits for the databus +
+ * *Reset 
+ * *Read
+ * *Write
+ * *ChipSelect
+ * A0
+ *
+ * @code
+ * Note1: Reset is a Schmitt trigger input that can normally not be driven from
+ * an output pin. The other pins can be directly connected to the MBED 
+ *           +5V
+ *            _
+ *           | | 10k
+ *           |_|
+ *            |
+ * MBED__    |/
+ *  -|___|---|  BC547
+ *    22k    |\>
+ *            |
+ *           ___
+ * @endcode
+ Character sizes can be set as desired (default 6*8). The SED seems to use a 
+ 5*7 font internally other font sizes use additional white space around the 
+ characters.
+ Font widths of more than 8 pixels are not supported.
+ The actual size of the display in characters is caluclated from the horizontal/ 
+ vertical resolution and the specified font size.
+ 
+ * Example:
+ * @code
+ / simple test for TextDisplay class
+ #include "mbed.h"
+ #include "Sed133xLCD.h"
+ 
+ Sed133xLCD lcd(p5, p6, p7, p8, p9, p28, p27, p26, p25, p24, p23, p22, p21,256,128, 6,9, "lcd");
+ 
+ 
+ int main() {
+      lcd.printf("Hello TextDisplay world!\r\n");
+      lcd.claim(stdout);
+      printf("hello stream world\r\n");
+ }
+
+ * @endcode
+ */
+class Sed133xLCD : public TextDisplay {
+public:
+    /** Create the TextDisplay interface
+     *
+     * @param reset PinName for reset
+     * @param nRead PinName for /read
+     * @param nWrite PinName for /write
+     * @param nSelect PinName for /select
+     * @param addr0 PinName for addr0
+     * @param d0-d7 PinName for D0 -D7
+     * @param hor_dots horizontal resolution  of display (in pixels), default: 256
+     * @param vert_dots vertical resolution of display (in pixels), default: 128
+     * @param char_width diaply width of character (in pixels), default: 6
+     * @param char_height display height of character (in pixels), default: 8 
+     * @param name name to be used in pathname of the stream (defaults to "sed133x")
+     */
+
+    Sed133xLCD(PinName reset, PinName nRead, PinName nWrite, PinName nSelect,PinName addr0,
+               PinName d0, PinName d1, PinName d2, PinName d3,
+               PinName d4, PinName d5, PinName d6, PinName d7,
+               uint16_t hor_dots = 256, uint16_t vert_dots = 128,
+               uint8_t char_width = 6, uint8_t char_height = 8, const char *name = "sed133x");
+    virtual void character(uint16_t column, uint16_t row, int c);
+    virtual uint16_t rows() {
+        return _rows;
+    }
+    virtual uint16_t columns() {
+        return _columns;
+    }
+    virtual void initializeSed();
+    virtual void cls();
+
+    // locate, putc, printf come from parent class
+
+protected:
+
+    commandName_t commandNameTab[];
+    char *commandName(command_t command_val);
+    void busWait(void);
+    void resetSed(void);
+    void sendByte(dataType_t type, uint8_t data);
+    uint8_t getByte(dataType_t type);
+    void sendCommand(uint8_t data);
+    void sendData(uint8_t data);
+    void systemSet(void);
+    void scrollSet(void);
+    void horizontalScrollPosition(void);
+    void overlayFormat(void);
+    void cursorDirection(void);
+    void cursorForm(void);
+    void displayOn(void);
+    void displayOff(void);
+    void charGenRamAddr(void);
+    void init(void);
+    void setCursor(uint8_t column, uint8_t row);
+    void setCursor(int offset);
+    void printText(uint8_t *text);
+    void printData(int len, uint8_t *data);
+    void clsText(void);
+    void clsGraphics(void);
+    void clearCharacterGeneratorRam(void);
+
+    DigitalOut _reset, _nRead, _nWrite, _nSelect, _addr0;
+    BusInOut _dataBus;
+    uint16_t _hor_dots, _vert_dots, _rows, _columns, _char_width, _char_height;
+};
+#endif
+
+
+