Revision 0:ecc29c13a997, committed 2017-12-03

Comitter:

wim

Date:

Sun Dec 03 18:02:15 2017 +0000

Commit message:

Library for Princeton PT6302 VFD controller.; Note the PT6302 is identical to the OKI ML9208.

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PT6302.cpp	Sun Dec 03 18:02:15 2017 +0000
@@ -0,0 +1,406 @@
+/* mbed PT6302 Library, for Princeton LC7571X VFD controller
+ * Note the PT6302 is identical to the OKI ML9208 
+ *
+ * Copyright (c) 2017, 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.
+ */
+
+#include "mbed.h" 
+#include "PT6302.h"
+#include "PT6302_UDC.inc"
+
+
+ /** Constructor for class for driving Princeton PT6302 VFD controller
+  *
+  *  @brief Supports upto 16 Grids of 35 matrix segments.
+  *         Also supports 2 additional segments and 2 port pins.
+  *         SPI bus interface device. 
+  *  @param  PinName mosi, sclk, cs SPI bus pins
+  *  @param  Mode selects number of Grids and Segments (default 16 Grids, 2 additional segments)
+  */
+PT6302::PT6302(PinName mosi, PinName sclk, PinName cs, Mode mode) : _spi(mosi,NC,sclk), _cs(cs), _mode(mode) {
+
+  _init();
+}
+
+/** Init the PT6302 interface and the controller
+  *
+  * @param  none
+  * @return none
+  */ 
+void PT6302::_init(){
+  
+//init SPI
+  _cs=1;
+  _spi.format(8,3); //PT6302 uses mode 3 (Clock High on Idle, Data latched on second (=rising) edge)
+  _spi.frequency(100000);   
+//  _spi.frequency(250000);     
+
+//init controller  
+  //setPort(0x0);  // Port Off (default at Reset)
+
+  // Set number of Grids
+  _writeCmd((PT6302_GRID_REG | _mode));      // Command register & value
+
+  setBrightness(PT6302_BRT_DEF); // Default Brightness
+
+  // Clear the DCRAM and ADRAM (undefined at Reset)
+  cls(); 
+
+  // Clear the UDC RAM (undefined at Reset)
+  const char udc_none[] = {0x00,0x00,0x00,0x00,0x00}; 
+  for (int idx=0; idx < PT6302_NR_UDC; idx++) {
+    setUDC(idx, (char *)udc_none);
+  }
+       
+  setDisplay(true);  // Display On
+}   
+
+
+/** Clear the screen
+  *
+  * @param none
+  * @return none  
+  */  
+void PT6302::cls() {
+
+  for (int cnt=0; cnt<PT6302_DSP_MEM; cnt++) {
+    writeData(char (' '), cnt); // data 
+//    writeData(0x00, cnt);       // data     
+  }
+
+  for (int cnt=0; cnt<PT6302_ADD_MEM; cnt++) {
+    writeAData(0x00, cnt);      // adata 
+  }  
+}  
+
+
+/** Set Brightness
+  *
+  * @param  char brightness (3 significant bits, valid range 0..7)  
+  * @return none
+  */
+void PT6302::setBrightness(char brightness){
+  
+//Sanity check
+  brightness = brightness & PT6302_BRT_MSK; // mask invalid bits
+ 
+  _writeCmd((PT6302_BRT_REG | brightness));  // Command register & value
+}
+
+/** Set the Display mode On/off
+  *
+  * @param bool display mode
+  * @return none  
+  */
+void PT6302::setDisplay(bool on) {
+  char display;
+     
+  if (on) {
+    display = PT6302_DSPL_NRM; // normal mode, show Display RAM content
+  }
+  else {
+    display = PT6302_DSPL_OFF; // all segments off
+  }
+
+  _writeCmd((PT6302_DSPL_REG | display));   // Command register & value
+}
+
+/** Set Port
+  *
+  * @param  char port (2 least significant bits)  
+  * @return none
+  */
+void PT6302::setPort (char port){
+
+//Sanity check
+  _port = port & PT6302_PDAT_MSK;          // Mask invalid bits
+ 
+  _writeCmd((PT6302_PDAT_REG | _port));    // Command register & value
+  _writeCmd((PT6302_PDAT_REG | _port));    // Command register & value (Dummy cmd to show on Latched LEDs)
+}
+
+
+/** Set User Defined Characters (UDC)
+  *
+  * @param unsigned char udc_idx   The Index of the UDC (0..7)
+  * @param UDCData_t udc_data      The bitpattern for the UDC (5 bytes)
+  * @return none  
+  */
+void PT6302::setUDC(unsigned char udc_idx, UDCData_t udc_data) {
+  
+//Sanity check
+  udc_idx = udc_idx & PT6302_UADR_MSK; // mask invalid bits
+
+  _cs=0; // Send Command & Params 
+  wait_us(1);  
+  _spi.write(_flip(PT6302_UDC_REG | udc_idx));     // Command register & address
+  wait_us(PT6302_CMD_DLY);         // Command Delay
+    
+  _spi.write(_flip(udc_data[0] & PT6302_UDC_MSK)); // CD30 CD25 ......  CD0
+  _spi.write(_flip(udc_data[1] & PT6302_UDC_MSK)); // CD31 CD26 ......  CD1
+  _spi.write(_flip(udc_data[2] & PT6302_UDC_MSK)); // CD32 CD27 ......  CD2
+  _spi.write(_flip(udc_data[3] & PT6302_UDC_MSK)); // CD33 CD28 ......  CD3
+  _spi.write(_flip(udc_data[4] & PT6302_UDC_MSK)); // CD34 CD29 ......  CD4
+
+  wait_us(PT6302_CS_DLY);          // CS Hold Delay  
+  _cs=1; // Latch Command & Params
+
+  wait_us(PT6302_CMD_DLY);         // Command Delay   
+}
+
+
+/** Write Data to PT6302
+  *
+  *  @param char data Character code
+  *  @param char address Parameter for data
+  *  @return none
+  */  
+void PT6302::writeData(char data, char address){
+
+//Sanity check
+  address = address & PT6302_DADR_MSK; // mask invalid bits
+
+  _writeCmd((PT6302_DATA_REG | address), // Command register & address
+             data);                      // Character code
+}  
+
+/** Write Additional Data to PT6302
+  *
+  *  @param char adata Additional code (annunciator)
+  *  @param char address Parameter for data
+  *  @return none
+  */  
+void PT6302::writeAData(char adata, char address){
+
+//Sanity check
+  address = address & PT6302_AADR_MSK; // mask invalid bits
+ 
+  _writeCmd((PT6302_ADAT_REG | address), // Command register & ADRAM address
+             adata);                     // ADATA
+}  
+
+/** Write command and data to PT6302
+  *
+  *  @param char cmd Command byte
+  *  @param char data Parameter for command  
+  *  @return none
+  */  
+void PT6302::_writeCmd(char cmd, char data){
+
+  _cs=0; // Prepare to send Command and data
+  wait_us(1);    
+
+  _spi.write(_flip(cmd));          // Command register & value
+
+  wait_us(PT6302_CMD_DLY);         // Command Delay
+  
+  _spi.write(_flip(data));         // data
+
+  wait_us(PT6302_CS_DLY);          // CS Hold Delay
+  _cs=1; // Latch Command and data 
+
+  wait_us(PT6302_CMD_DLY);         // Command Delay
+}  
+
+/** Write command to PT6302
+  *
+  *  @param char cmd Command byte
+  *  @return none
+  */  
+void PT6302::_writeCmd(char cmd){
+
+  _cs=0; // Prepare to send Command
+  wait_us(1);
+
+  _spi.write(_flip(cmd));          // Command register & value
+
+  wait_us(PT6302_CS_DLY);          // CS Hold Delay  
+  _cs=1; // Latch Command
+
+  wait_us(PT6302_CMD_DLY);         // Command Delay
+}  
+
+
+
+/** Helper to reverse all command or databits. The PT6302 expects LSB first, whereas SPI is MSB first
+  *
+  *  @param  char data
+  *  @return bitreversed data
+  */ 
+char PT6302::_flip(char data) {
+ char value=0;
+  
+ if (data & 0x01) {value |= 0x80;} ;  
+ if (data & 0x02) {value |= 0x40;} ;
+ if (data & 0x04) {value |= 0x20;} ;
+ if (data & 0x08) {value |= 0x10;} ;
+ if (data & 0x10) {value |= 0x08;} ;
+ if (data & 0x20) {value |= 0x04;} ;
+ if (data & 0x40) {value |= 0x02;} ;
+ if (data & 0x80) {value |= 0x01;} ;
+ return value;       
+}
+
+
+#if (HANNSTAR_TEST == 1) 
+
+/** Constructor for class for Princeton PT6302 VFD controller as used in HANNSTAR
+  *
+  *  @brief Supports 16 Grids of 35 Segments without additional Segments.
+  *  
+  *  @param  PinName mosi, miso, sclk, cs SPI bus pins
+  */
+PT6302_HANNSTAR::PT6302_HANNSTAR(PinName mosi, PinName sclk, PinName cs) : PT6302(mosi, sclk, cs, Grid16_Add2) {
+  _column   = 0;
+  _columns  = HANNSTAR_NR_DIGITS;
+  
+  //Enable VGen for VFD Power Supply
+  setVGen(true);   
+}
+
+/** Locate cursor to a screen column
+  *
+  * @param column  The horizontal position from the left, indexed from 0
+  * @return none  
+  */
+void PT6302_HANNSTAR::locate(int column) {
+  //sanity check
+  if (column < 0) {column = 0;}
+  if (column > (_columns - 1)) {column = _columns - 1;}  
+  
+  _column = column;       
+}
+
+
+/** Number of screen columns
+  *
+  * @param none
+  * @return columns
+  */
+int PT6302_HANNSTAR::columns() {
+    return _columns;
+}
+
+
+/** Clear the screen and locate to 0
+  *
+  * @param bool clrAll Clear Icons also (default = false)
+  * @return none  
+  */ 
+void PT6302_HANNSTAR::cls(bool clrAll) {  
+
+  for (int cnt=0; cnt<HANNSTAR_NR_DIGITS; cnt++) {
+    writeData(char (' '), cnt); // data 
+  }
+
+  if (clrAll) {
+    //Clear Icons    
+    for (int cnt=0; cnt<HANNSTAR_NR_DIGITS; cnt++) {
+      writeAData(0x00, cnt);      // adata 
+    }   
+  }  
+
+  _column = 0;   
+}    
+
+
+/** Set Port
+  *
+  * @param  char port (Only Bit 1 is used)  
+  * @return none
+  */
+void PT6302_HANNSTAR::setPort (char port){
+
+//Sanity check
+  _port &= ~PT6302_HANN_PDAT_MSK;         // Clear valid bits
+  _port |= (port & PT6302_HANN_PDAT_MSK); // Mask invalid bits
+ 
+  _writeCmd((PT6302_PDAT_REG | _port));   // Command register & value
+  _writeCmd((PT6302_PDAT_REG | _port));   // Command register & value (Dummy cmd to show on Latched LEDs)  
+}
+
+
+/** Set VFD VGen
+  *
+  * @param  bool on
+  * @return none
+  */
+void PT6302_HANNSTAR::setVGen(bool on){     
+
+  if (on) {
+    _port = _port | PT6302_HANN_VGEN;  // VGen On
+  }
+  else {
+    _port = _port & ~PT6302_HANN_VGEN; // VGen Off
+  }
+
+  _writeCmd((PT6302_PDAT_REG | _port));   // Command register & value
+  _writeCmd((PT6302_PDAT_REG | _port));   // Command register & value (Dummy cmd to show on Latched LEDs)  
+}
+
+
+/** Write a single character (Stream implementation)
+  * 
+  * @param value char to print
+  * @return value;
+  */
+int PT6302_HANNSTAR::_putc(int value) {
+    int addr;
+    
+    if ((value == '\n') || (value == '\r')) {
+      //No character to write
+     
+      //Update Cursor      
+      _column = 0;
+    }
+    else if ((value >= 0) && (value < 256)) {
+      //Character to write
+
+      //Translate between _column and displaybuffer entries
+      //Note that the HANNSTAR has 1 digit/grid. 
+      //_column ==  0 => Grid15  => addr = 15
+      //_column ==  1 => Grid14  => addr = 14
+      // ....
+      //_column == 15 => Grid1   => addr = 0            
+      addr = (15 - _column); // 1 Byte for every Grid;
+      
+      writeData(value, addr);
+                                
+      //Update Cursor
+      _column++;
+      if (_column > (HANNSTAR_NR_DIGITS - 1)) {        
+        _column = 0;
+      }
+
+    } // if validChar           
+
+    return value;
+}
+
+/** Get a single character (Stream implementation)
+  *
+  * @param none  
+  * @return -1
+  */
+int PT6302_HANNSTAR::_getc() {
+    return -1;
+}
+#endif

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PT6302.h	Sun Dec 03 18:02:15 2017 +0000
@@ -0,0 +1,461 @@
+/* mbed PT6302 Library, for Princeton PT6302 VFD controller
+ * Note the PT6302 is identical to the OKI ML9208 
+ *
+ * Copyright (c) 2017, 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 PT6302_H
+#define PT6302_H
+
+// Select one of the testboards for Princeton PT6302 VFD controller
+#include "PT6302_Config.h"
+#include "PT6302_UDC.h"
+
+/** An interface for driving Princeton PT6302 VFD controller
+ *
+ * @code
+ *
+ * #if (PT6302_TEST == 1)  
+ * // Direct driving of PT6302 Test
+ *
+ * #include "mbed.h"
+ * #include "PT6302.h" 
+ *
+ * DigitalOut myled(LED1);
+ * Serial pc(USBTX, USBRX);
+ * 
+ * // PT6302 declaration, Default setting 16 Grids @ 35 Segments
+ * PT6302 PT6302(p5, p7, p8); // DI, CLK, CS
+ *
+ * int main() {
+ *   pc.printf("Hello World: PT6302 test\n\r");
+ *
+ *   PT6302.cls(); 
+ *
+ *   PT6302.writeData((char)'H', 9);
+ *   PT6302.writeData((char)'e', 8);
+ *   PT6302.writeData((char)'l', 7);
+ *   PT6302.writeData((char)'l', 6);
+ *   PT6302.writeData((char)'o', 5);
+ *   wait(2);
+ *   PT6302.setBrightness(PT6302_BRT0);
+ *   wait(2);
+ *   PT6302.setBrightness(PT6302_BRT3);
+ *           
+ *   while(1) {
+ *     myled = !myled;
+ *     wait(1);
+ *   }
+ * }
+ * #endif
+ *
+ * @endcode
+ */
+
+
+//PT6302 Display and Annunciator data
+#define PT6302_MAX_NR_GRIDS   16
+#define PT6302_BYTES_PER_GRID  1
+
+//Memory size in bytes for Display and Annunciators
+#define PT6302_DSP_MEM        16
+#define PT6302_ADD_MEM        16
+//#define PT6302_UDC_MEM         8
+
+//SPI Serial control data consists of an 8-bit command and one or more data bytes.
+//Command and data are sent LSB first and latched on rising edge of CLK. Idle CLK is high.
+//Data address is auto incremented.
+//The commands and data are transmitted during CE low and latched on rising CE edge.
+//Multiple PT6302 devices on the same bus can only be distinguised by the CE control.
+
+//Command delay
+#define PT6302_CMD_DLY         8
+#define PT6302_CS_DLY         16
+
+//
+//Set Char data command (DCRAM)
+// 0 0 0 1 DA3 DA2 DA1 DA0
+#define PT6302_DATA_REG       0x10
+
+//DA3..DA0 DCRAM Address
+#define PT6302_DADR_MSK       0x0F
+
+//Char data (2nd byte, 3rd byte ...)
+//DA7..DA0 Character Data
+#define PT6302_DATA_MSK       0xFF
+
+
+//
+//Set UDC data command (CGRAM)
+// 0 0 1 0 * UA2 UA1 UA0
+#define PT6302_UDC_REG        0x20
+
+//UA2..UA0 CGRAM Address (UDC RAM address)
+#define PT6302_UADR_MSK       0x07
+#define PT6302_NR_UDC            8
+
+//User Defined Characters (UDCs) consist of 5x7 dots and are defined by a 5 byte bitpattern.
+//UDC data (2nd byte .. 6th byte)
+//    D7 D6   D5   D4.. D1 D0 
+// 0  *  CD30 CD25 ......  CD0
+// 1  *  CD31 CD26 ......  CD1
+// 2  *  CD32 CD27 ......  CD2
+// 3  *  CD33 CD28 ......  CD3
+// 4  *  CD34 CD29 ......  CD4
+//
+#define PT6302_UDC_MSK        0x7F
+
+//CD34..CD0 UDC Data
+//UDC is a 5x7 Matrix pattern that will show on the VFD as
+// 0   C0  C1  C2  C3  C4
+// 1   C5  C6 .....    C9
+// .    .............
+// .    .............
+// .    .............
+// 6   C30 C31 ...     C34
+//
+
+//UDCs are defined by a 5x7 matrix and stored as 5 bytes
+typedef char UDCData_t[5];
+
+
+//
+//Set Additional data command (ADRAM), Used for annunciators etc
+// 0 0 1 1 AA3 AA2 AA1 AA0
+#define PT6302_ADAT_REG      0x30
+
+//AA3..AA0 ADRAM Address (Additional data)
+#define PT6302_AADR_MSK      0x0F
+
+//* * * * * * AD1 AD0 Additional Data (2nd byte, 3rd byte, ..)
+#define PT6302_ADAT_MSK      0x03
+
+
+//
+//Set Port data command (General output)
+// 0 1 0 0 * * P1 P0
+#define PT6302_PDAT_REG      0x40
+
+//P1 P0 Port data
+#define PT6302_PDAT_MSK      0x03
+
+
+
+//
+//Set Brightness command
+// 0 1 0 1 * DC2 DC1 DC0
+#define PT6302_BRT_REG      0x50
+#define PT6302_BRT_MSK      0x07
+
+//DC2..DC0 Brightness Level (0..7)
+//Note Brightness relationship between the number of active Grids (period) and the BRT value (duty cycle)
+#define PT6302_BRT_0        0x00   //Duty  8/16 (Default)
+#define PT6302_BRT_1        0x01
+#define PT6302_BRT_2        0x02
+#define PT6302_BRT_3        0x03
+#define PT6302_BRT_4        0x04
+#define PT6302_BRT_5        0x05
+#define PT6302_BRT_6        0x06
+#define PT6302_BRT_7        0x07   //Duty 15/16
+
+#define PT6302_BRT_DEF      (PT6302_BRT_2)
+
+
+//
+//Grid control command
+// 0 1 1 0 * GN2 GN1 GN0
+#define PT6302_GRID_REG     0x60
+#define PT6302_GRID_MSK     0x07
+
+//Grids
+//
+// GN2 GN1 GN0
+//  0   0   0   G1 to G16  // Default
+//  0   0   1   G1 to G9
+//  0   1   0   G1 to G10
+//  0   1   1   G1 to G11
+//  1   0   0   G1 to G12
+//  1   0   1   G1 to G13
+//  1   1   0   G1 to G14
+//  1   1   1   G1 to G15
+#define PT6302_GR1_GR9      0x01
+#define PT6302_GR1_GR10     0x02
+#define PT6302_GR1_GR11     0x03
+#define PT6302_GR1_GR12     0x04
+#define PT6302_GR1_GR13     0x05
+#define PT6302_GR1_GR14     0x06
+#define PT6302_GR1_GR15     0x07
+#define PT6302_GR1_GR16     0x00
+
+
+//
+//Display On/Off command
+// 0 1 1 1 * * H L
+#define PT6302_DSPL_REG     0x70
+#define PT6302_DSPL_MSK     0x03
+
+//Display Mode
+// H L Display operating state
+// 0 0 Normal (default)
+// 0 1 Off
+// 1 0 All Segments and Additional Segments On
+// 1 1 All Segments and Additional Segments On
+#define PT6302_DSPL_NRM     0x00
+#define PT6302_DSPL_OFF     0x01
+#define PT6302_DSPL_ON      0x02
+
+
+/** A class for driving Princeton PT6302 VFD controller
+ *
+ *  @brief Supports upto 16 Grids of 35 matrix segments. 
+ *         Also supports 2 additional segments and 2 port pins. 
+ *         SPI bus interface device. 
+ */
+class PT6302 {
+ public:
+
+  /** Enums for display mode */
+  enum Mode {
+    Grid9_Add2  = PT6302_GR1_GR9,
+    Grid10_Add2 = PT6302_GR1_GR10,
+    Grid11_Add2 = PT6302_GR1_GR11,
+    Grid12_Add2 = PT6302_GR1_GR12,
+    Grid13_Add2 = PT6302_GR1_GR13,
+    Grid14_Add2 = PT6302_GR1_GR14,
+    Grid15_Add2 = PT6302_GR1_GR15,
+    Grid16_Add2 = PT6302_GR1_GR16
+  };
+ 
+ /** Datatypes for display data */
+//  typedef char DisplayData_t[PT6302_DISPLAY_MEM];
+//  typedef char DisplayAdd_t[PT6302_ADD_MEM];  
+    
+ /** Constructor for class for driving Princeton PT6302 VFD controller
+  *
+  *  @brief Supports upto 16 Grids of 35 matrix segments. 
+  *         Also supports 2 additional segments and 2 port pins.  
+  *         SPI bus interface device. 
+  *  @param  PinName mosi, sclk, cs SPI bus pins
+  *  @param  Mode selects number of Grids and Segments (default 16 Grids, 2 additional segments)
+  */
+  PT6302(PinName mosi, PinName sclk, PinName cs, Mode mode = Grid16_Add2);
+      
+  /** Clear the screen
+    *
+    * @param none
+    * @return none
+    */ 
+  void cls();  
+
+  /** Set Brightness
+    *
+    * @param  char brightness (3 significant bits, valid range 0..7 (dutycycle linked to number of grids)  
+    * @return none
+    */    
+  void setBrightness(char brightness = PT6302_BRT_DEF);
+  
+  /** Set the Display mode On/off
+    *
+    * @param bool display mode
+    * @return none    
+    */
+  void setDisplay(bool on);
+
+
+  /** Set Port
+    *
+    * @param  char port (2 least significant bits)  
+    * @return none
+    */
+  void setPort (char port = 0);
+
+  /** Set User Defined Characters (UDC)
+    *
+    * @param unsigned char udc_idx   The Index of the UDC (0..7)
+    * @param UDCData_t udc_data      The bitpattern for the UDC (5 bytes)
+    * @return none    
+    */
+  void setUDC(unsigned char udc_idx, UDCData_t udc_data);
+
+ 
+  /** Write Data to PT6302
+    *
+    *  @param char data Character code
+    *  @param char address Parameter for data
+    *  @return none
+    */  
+  void writeData(char data, char address);
+
+  /** Write Additional Data to PT6302
+    *
+    *  @param char adata Additional code (annunciator)
+    *  @param char address Parameter for data
+    *  @return none
+    */  
+  void writeAData(char adata, char address);
+ 
+ protected:  
+  /** Write command and parameters to PT6302
+    *
+    *  @param char cmd Command byte
+    *  @param char data Parameter for command
+    *  @return none
+    */  
+  void _writeCmd(char cmd, char data);
+ 
+  /** Write command to PT6302
+    *
+    *  @param char cmd Command byte
+    *  @return none
+    */  
+  void _writeCmd(char cmd);
+
+  char _port; 
+
+ private:  
+  SPI _spi;
+  DigitalOut _cs;
+  Mode _mode;
+  
+  /** Init the SPI interface and the controller
+    *
+    * @param  none
+    * @return none
+    */ 
+  void _init();
+
+  /** Helper to reverse all command or databits. The PT6302 expects LSB first, whereas SPI is MSB first
+    *
+    *  @param  char data
+    *  @return bitreversed data
+    */ 
+  char _flip(char data);
+
+};
+
+
+#if (HANNSTAR_TEST == 1)
+// Derived class for HANNSTAR display unit
+//   Grids 1-16 all display 35 segment matrix characters and no Additional segments.
+//
+
+//HANNSTAR Display data
+#define HANNSTAR_NR_GRIDS  16
+#define HANNSTAR_NR_DIGITS 16
+//#define HANNSTAR_NR_UDC    8
+
+//HANNSTAR Memory size in bytes for Display
+//#define HANNSTAR_DISPLAY_MEM (HANNSTAR_NR_GRIDS * PT6302_BYTES_PER_GRID)
+
+
+//
+//Set Port data command (General output)
+// 0 1 0 0 * * P1 P0
+
+//P0 P1 Port data, P0 is used for VGen control
+#define PT6302_HANN_PDAT_MSK  0x02
+
+//P0 is used to control the VFD Voltage generator (-24V and Filament)
+#define PT6302_HANN_VGEN      0x01
+
+
+
+/** Constructor for class for driving Princeton PT6302 VFD controller as used in HANNSTAR
+  *
+  *  @brief Supports 16 Grids of 35 Segments without additional Segments.
+  *  
+  *  @param  PinName mosi, sclk, cs SPI bus pins
+  */
+class PT6302_HANNSTAR : public PT6302, public Stream {
+ public:
+
+/** Constructor for class for driving Princeton PT6302 VFD controller as used in HANNSTAR
+  *
+  *  @brief Supports 16 Grids of 35 Segments without additional Segments.
+  *  
+  *  @param  PinName mosi, sclk, cs SPI bus pins
+  */
+  PT6302_HANNSTAR(PinName mosi, PinName sclk, PinName cs);
+
+#if DOXYGEN_ONLY
+    /** Write a character to the Display
+     *
+     * @param c The character to write to the display
+     * @return char written
+     */
+    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
+     * @return none     
+     */
+    void locate(int column);
+    
+    /** Clear the screen and locate to 0
+     *
+     * @param bool clrAll Clear Icons also (default = false)
+     */
+    void cls(bool clrAll = false);
+
+   /** Number of screen columns
+    *
+    * @param none
+    * @return columns
+    */
+    int columns();  
+
+  /** Set Port
+    *
+    * @param  char port (Only Bit 1 is used)
+    * @return none
+    */
+  void setPort (char port = 0);     
+
+  /** Set VFD VGen
+    *
+    * @param  bool on
+    * @return none
+    */
+  void setVGen (bool on = true);     
+
+protected:  
+    // Stream implementation functions
+    virtual int _putc(int value);
+    virtual int _getc();
+
+private:
+    int _column;                     // Current cursor location
+    int _columns;                    // Max number of columns
+    
+//    DisplayData_t _displaybuffer;    // Local mirror for all chars and icons
+};
+#endif
+
+#endif
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PT6302_Config.h	Sun Dec 03 18:02:15 2017 +0000
@@ -0,0 +1,35 @@
+/* mbed PT6302 Library, for Princeton PT6302 VFD controller
+ * Note the PT6302 is identical to the OKI ML9208 
+ *
+ * Copyright (c) 2017, 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 PT6302_CONFIG_H
+#define PT6302_CONFIG_H
+
+// Select one of the testboards for Princeton PT6302 VFD controller
+#define PT6302_TEST   0 
+#define HANNSTAR_TEST 1 
+
+// Select if you want to include some UDC patterns
+#define PT6302_UDC    1
+
+#endif
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PT6302_UDC.h	Sun Dec 03 18:02:15 2017 +0000
@@ -0,0 +1,62 @@
+/* mbed PT6302 UDC Library, for Princeton PT6302 VFD controller
+ * Note the PT6302 is identical to the OKI ML9208 
+ *
+ * Copyright (c) 2017, 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 MBED_PT6302_UDC_H
+#define MBED_PT6302_UDC_H
+
+#include "PT6302_Config.h"
+
+#if(PT6302_UDC == 1)
+// User Defined Characters (UDCs) consist of 5x7 dots and are defined by a 5 byte bitpattern.
+// The C0..C34 form the character pattern.
+//     D7 D6  D5  D4  D3 D2 D1 D0 
+// 0   x  C30 C25 C20 ......   C0
+// 1   x  C31 C24  ........... C1
+// .       .............
+// 4   x  C34 C29  ........... C4
+//
+//
+// The UDC matrix will show on the VFD as
+// 0   C0  C1  C2  C3  C4
+// 1   C5  C6 .....    C9
+// .    .............
+// .    .............
+// .    .............
+// 6   C30 C31 ...     C34
+//
+
+
+// Some sample User Defined Chars 5x7 dots */
+//extern const char udc_Bat_Hi[];  // Battery Full
+//extern const char udc_Bat_Ha[];  // Battery Half
+//extern const char udc_Bat_Lo[];  // Battery Low
+//extern const char udc_checker[];                          
+                                          
+//extern const char udc_PO[];    //Padlock Open
+//extern const char udc_PC[];    //Padlock Closed
+
+extern const char udc_LAR[];   // Left Arrow
+extern const char udc_RAR[];   // Right Arrow
+#endif
+
+#endif

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PT6302_UDC.inc	Sun Dec 03 18:02:15 2017 +0000
@@ -0,0 +1,57 @@
+/* mbed PT6302 UDC Library, for Princeton PT6302 VFD controller
+ * Note the PT6302 is identical to the OKI ML9208 
+ *
+ * Copyright (c) 2017, 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.
+ */
+#include "PT6302_Config.h"
+
+#if(PT6302_UDC == 1)
+
+// User Defined Characters (UDCs) are defined by a 5 byte bitpattern.
+// The C0..C34 form the character pattern.
+//     D7 D6  D5  D4  D3 D2 D1 D0 
+// 0   x  C30 C25 C20 ......   C0
+// 1   x  C31 C24  ........... C1
+// .       .............
+// 4   x  C34 C29  ........... C4
+//
+//
+// The UDC matrix will show on the VFD as
+// 0   C0  C1  C2  C3  C4
+// 1   C5  C6 .....    C9
+// .    .............
+// .    .............
+// .    .............
+// 6   C30 C31 ...     C34
+//
+//
+// Some sample User Defined Chars 5x7 dots */
+const char udc_Bat_Hi[]  = {0x0E, 0x1F, 0x1F, 0x1F, 0x1F};  // Battery Full
+const char udc_Bat_Ha[]  = {0x0E, 0x11, 0x13, 0x17, 0x1F};  // Battery Half
+const char udc_Bat_Lo[]  = {0x0E, 0x11, 0x11, 0x11, 0x11};  // Battery Low
+const char udc_checker[] = {0xAA, 0x55, 0xAA, 0x55, 0xAA};                          
+                                          
+//const char udc_PO[] = {0x04, 0x0A, 0x0A, 0x1F, 0x1B, 0x1B};  //Padlock Open
+//const char udc_PC[] = {0x1C, 0x10, 0x08, 0x1F, 0x1B, 0x1B};  //Padlock Closed
+
+const char udc_LAR[]  = {0x07, 0x03, 0x05, 0x78, 0x00};   // Left Arrow
+const char udc_RAR[]  = {0x00, 0x78, 0x05, 0x03, 0x07};   // Right Arrow
+#endif