Diff: PT6964.h

Revision:

0:27f32a087e5a

Child:

1:1adf993a3e34

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PT6964.h	Sat Nov 21 16:43:15 2015 +0000
@@ -0,0 +1,338 @@
+/* mbed PT6964 Library, for PT6964 LED controller
+ * Copyright (c) 2015, v01: WH, Initial version
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef PT6964_H
+#define PT6964_H
+
+#include "Font_7Seg.h"
+
+/** An interface for driving PT6964 LED controller
+ *
+ * @code
+ * #include "mbed.h"
+ * #include "PT6964.h" 
+ * 
+ * DisplayData_t size is  8 bytes (4 grids @ 13 segments) OR 10 bytes (5 grids @ 12 segments) OR
+ *                       12 bytes (6 grids @ 11 segments) OR 14 bytes (7 grids @ 10 segments) 
+ * PT6964::DisplayData_t mbed_str = {0xDA,0x00, 0x7C,0x00, 0x3C,0x01, 0xF6,0x00, 0x00,0x00, 0x00,0x00, 0x00,0x00};  
+ * PT6964::DisplayData_t all_str  = {0xFF,0x0F, 0xFF,0x0F, 0xFF,0x0F, 0xFF,0x0F, 0xFF,0x0F, 0xFF,0x0F, 0xFF,0x0F};  
+ *
+ * // KeyData_t size is 5 bytes  
+ * PT6964::KeyData_t keydata; 
+ *
+ * // PT6964 declaration, Default setting 7 Grids @ 10 Segments
+ * PT6964 PT6964(p5,p6,p7, p8);
+ *
+ * int main() {
+ *   PT6964.cls(); 
+ *   PT6964.writeData(all_str);
+ *   wait(4);
+ *   PT6964.writeData(mbed_str);    
+ *   wait(1);
+ *   PT6964.setBrightness(PT6964_BRT0);
+ *   wait(1);
+ *   PT6964.setBrightness(PT6964_BRT3);
+ *
+ *   while (1) {
+ *    // Check and read keydata
+ *    if (PT6964.getKeys(&keydata)) {
+ *      pc.printf("Keydata 0..4 = 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\r\n", keydata[0], keydata[1], keydata[2], keydata[3], keydata[4]);
+ *
+ *      if (keydata[0] == 0x10) { //sw2   
+ *        PT6964.cls(); 
+ *        PT6964.writeData(all_str);
+ *      }  
+ *    } 
+ *   }   
+ * }
+ * @endcode
+ */
+
+//Memory size in bytes for Display and Keymatrix
+#define PT6964_DISPLAY_MEM    14
+#define PT6964_KEY_MEM         5
+//Significant bits Keymatrix data
+#define PT6964_KEY_BITS        5 
+
+//Reserved bits for commands
+#define PT6964_CMD_MSK      0xC0
+
+//Mode setting command
+#define PT6964_MODE_SET_CMD 0x00
+#define PT6964_GR4_SEG13    0x00
+#define PT6964_GR5_SEG12    0x01
+#define PT6964_GR6_SEG11    0x02
+#define PT6964_GR7_SEG10    0x03 //default
+
+//Data setting commands
+#define PT6964_DATA_SET_CMD 0x40
+#define PT6964_DATA_WR      0x00
+#define PT6964_KEY_RD       0x02
+#define PT6964_ADDR_INC     0x00
+#define PT6964_ADDR_FIXED   0x04
+#define PT6964_MODE_NORM    0x00
+#define PT6964_MODE_TEST    0x08
+
+//Address setting commands
+#define PT6964_ADDR_SET_CMD 0xC0
+#define PT6964_ADDR_MSK     0x0F
+
+//Display control commands
+#define PT6964_DSP_CTRL_CMD 0x80
+#define PT6964_BRT_MSK      0x07
+#define PT6964_BRT0         0x00 //Pulsewidth 1/16
+#define PT6964_BRT1         0x01
+#define PT6964_BRT2         0x02
+#define PT6964_BRT3         0x03
+#define PT6964_BRT4         0x04
+#define PT6964_BRT5         0x05
+#define PT6964_BRT6         0x06
+#define PT6964_BRT7         0x07 //Pulsewidth 14/16
+
+#define PT6964_BRT_DEF      PT6964_BRT3
+
+#define PT6964_DSP_OFF      0x00
+#define PT6964_DSP_ON       0x08
+
+
+/** A class for driving Princeton PT6964 LED controller
+ *  Note: the PT6964 is also available from other chipvendors eg AIP1628, HT1628, CM1628, SM1628
+ *
+ * @brief Supports 4 Grids @ 13 Segments or 5 Grids @ 12 Segments or 6 Grids @ 11 Segments or 7 Grids @ 10 Segments. 
+ *        Also supports a scanned keyboard of upto 20 keys.
+ *        SPI bus interface device. 
+ */
+class PT6964 {
+ public:
+
+  /** Enums for display mode */
+  enum Mode {
+    Grid4_Seg13 = PT6964_GR4_SEG13,
+    Grid5_Seg12 = PT6964_GR5_SEG12,   
+    Grid6_Seg11 = PT6964_GR6_SEG11,
+    Grid7_Seg10 = PT6964_GR7_SEG10
+  };
+  
+  /** Datatypes for display and keymatrix data */
+  typedef char DisplayData_t[PT6964_DISPLAY_MEM];
+  typedef char KeyData_t[PT6964_KEY_MEM];
+    
+ /** Constructor for class for driving Princeton PT6964 LED controller
+  *
+  * @brief Supports 4 Grids @ 13 segments or 5 Grids @ 12 segments or 6 Grids @ 11 Segments or 7 Grids @ 10 Segments. 
+  *        Also supports a scanned keyboard of upto 20 keys.
+  *        SPI bus interface device. 
+  *
+  *  @param  PinName mosi, miso, sclk, cs SPI bus pins
+  *  @param  Mode selects either Grids/Segments (default 7 Grids @ 10 Segments)
+  */
+  PT6964(PinName mosi, PinName miso, PinName sclk, PinName cs, Mode mode=Grid7_Seg10);
+      
+  /** Clear the screen and locate to 0
+   */ 
+  void cls();  
+
+  /** Write databyte to PT6964
+   *  @param  int address display memory location to write byte
+   *  @param  char data byte written at given address
+   *  @return none
+   */ 
+  void writeData(int address, char data); 
+ 
+ /** Write Display datablock to PT6964
+   *  @param  DisplayData_t data Array of PT6964_DISPLAY_MEM (=14) bytes for displaydata (starting at address 0)
+   *  @param  length number bytes to write (valid range 0..PT6964_DISPLAY_MEM (=14), starting at address 0)   
+   *  @return none
+   */   
+  void writeData(DisplayData_t data, int length = PT6964_DISPLAY_MEM);
+
+  /** Read keydata block from PT6964
+   *  @param  *keydata Ptr to Array of PT6964_KEY_MEM (=5) bytes for keydata
+   *  @return bool keypress True when at least one key was pressed
+   *
+   * Note: Due to the hardware configuration the PT6964 key matrix scanner will detect multiple keys pressed at same time,
+   *       but this may result in some spurious keys also being set in keypress data array.
+   *       It may be best to ignore all keys in those situations. That option is implemented in this method depending on #define setting.
+   */   
+  bool getKeys(KeyData_t *keydata);
+
+  /** Set Brightness
+    *
+    * @param  char brightness (3 significant bits, valid range 0..7 (1/16 .. 14/14 dutycycle)  
+    * @return none
+    */
+  void setBrightness(char brightness = PT6964_BRT_DEF);
+  
+  /** Set the Display mode On/off
+    *
+    * @param bool display mode
+    */
+  void setDisplay(bool on);
+  
+ private:  
+  SPI _spi;
+  DigitalOut _cs;
+  Mode _mode;
+  char _display;
+  char _bright; 
+  
+  /** Init the SPI interface and the controller
+    * @param  none
+    * @return none
+    */ 
+  void _init();
+
+  /** Helper to reverse all command or databits. The PT6964 expects LSB first, whereas SPI is MSB first
+    *  @param  char data
+    *  @return bitreversed data
+    */ 
+  char _flip(char data);
+
+  /** Write command and parameter to PT6964
+    *  @param  int cmd Command byte
+    *  &Param  int data Parameters for command
+    *  @return none
+    */ 
+  void _writeCmd(int cmd, int data);  
+};
+
+
+
+// Derived class for PT6964 used in DVD-538A front display unit
+//
+
+#define DVD538A_NR_GRIDS  5
+#define DVD538A_NR_DIGITS 4
+#define DVD538A_DIG1_IDX  1
+#define DVD538A_NR_UDC    8
+
+/** Constructor for class for driving Princeton PT6964 controller as used in DVD538A
+  *
+  *  @brief Supports 4 Digits of 7 Segments, 1 Grid of 9 Icons. Also supports a scanned keyboard of 4 keys.
+  *  
+  *  @param  PinName mosi, miso, sclk, cs SPI bus pins
+  */
+class PT6964_DVD538A : public PT6964, public Stream {
+ public:
+
+  /** Enums for Icons */
+  //  Grid encoded in 16 MSBs, Icon pattern encoded in 16 LSBs
+  enum Icon {
+    Grid1_LD1  = (1<<16) | S_LD1,
+    Grid1_LD2  = (1<<16) | S_LD2,
+    Grid1_CD   = (1<<16) | S_CD,
+    Grid1_DVD  = (1<<16) | S_DVD,
+    Grid1_PSE  = (1<<16) | S_PSE,
+    Grid1_PLY  = (1<<16) | S_PLY,    
+    Grid1_COL  = (1<<16) | S_COL,
+    Grid1_MP4  = (1<<16) | S_MP4,
+    Grid1_MP3  = (1<<16) | S_MP3    
+  };
+  
+  typedef char UDCData_t[DVD538A_NR_UDC][2];
+  
+ /** Constructor for class for driving Princeton PT6964 VFD controller as used in DVD538A
+   *
+   * @brief Supports 4 Digits of 7 Segments, 1 Grid of 9 Icons. Also supports a scanned keyboard of 4 keys.
+   *  
+   * @param  PinName mosi, miso, sclk, cs SPI bus pins
+   */
+  PT6964_DVD538A(PinName mosi, PinName miso, PinName sclk, PinName cs);
+
+#if DOXYGEN_ONLY
+    /** Write a character to the Display
+     *
+     * @param c The character to write to the display
+     */
+    int putc(int c);
+
+    /** Write a formatted string to the Display
+     *
+     * @param format A printf-style format string, followed by the
+     *               variables to use in formatting the string.
+     */
+    int printf(const char* format, ...);   
+#endif
+
+     /** Locate cursor to a screen column
+     *
+     * @param column  The horizontal position from the left, indexed from 0
+     */
+    void locate(int column);
+    
+    /** Clear the screen and locate to 0
+     */
+    void cls();
+
+    /** Set Icon
+     *
+     * @param Icon icon Enums Icon has Grid position encoded in 16 MSBs, Icon pattern encoded in 16 LSBs
+     * @return none
+     */
+    void setIcon(Icon icon);
+
+    /** Clr Icon
+     *
+     * @param Icon icon Enums Icon has Grid position encoded in 16 MSBs, Icon pattern encoded in 16 LSBs
+     * @return none
+     */
+    void clrIcon(Icon icon);
+
+   /** Set User Defined Characters (UDC)
+     *
+     * @param unsigned char udc_idx   The Index of the UDC (0..7)
+     * @param int udc_data            The bitpattern for the UDC (16 bits)       
+     */
+    void setUDC(unsigned char udc_idx, int udc_data);
+
+
+   /** Number of screen columns
+    *
+    * @param none
+    * @return columns
+    */
+    int columns();   
+
+   /** Write Display datablock to PT6964
+    *  @param  DisplayData_t data Array of PT6964_DISPLAY_MEM (=14) bytes for displaydata (starting at address 0)
+    *  @param  length number bytes to write (valid range 0..(DVD538A_NR_GRIDS*2) (=14), starting at address 0)   
+    *  @return none
+    */   
+    void writeData(DisplayData_t data, int length = (DVD538A_NR_GRIDS*2)) {
+      PT6964::writeData(data, length);
+    }  
+
+protected:  
+    // Stream implementation functions
+    virtual int _putc(int value);
+    virtual int _getc();
+
+private:
+    int _column;
+    int _columns;   
+    
+    DisplayData_t _displaybuffer;
+    UDCData_t _UDC_16S; 
+};
+
+
+#endif
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