Revision 0:4430a1559b4f, committed 2017-10-10

Comitter:

wim

Date:

Tue Oct 10 18:38:46 2017 +0000

Commit message:

Library for TM1650 LED controller (32 LEDs max, 27 keys max)

Changed in this revision

diff -r 000000000000 -r 4430a1559b4f Font_7Seg.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Font_7Seg.cpp	Tue Oct 10 18:38:46 2017 +0000
@@ -0,0 +1,166 @@
+/* mbed LED Font Library, for TM1650 LED controller
+ * Copyright (c) 2017, v01: WH, Initial version, Test in MEIBAI
+ *
+ * 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 "Font_7Seg.h"
+
+// Select one of the testboards for TM1650 LED controller
+#if ((MEIBAI_TEST == 1) || (TM1650_TEST == 1))
+
+//Mask for blending out and restoring Icons
+const char MASK_ICON_GRID[] = {
+                                LO(S7_ICON_GR1),
+                                LO(S7_ICON_GR2),
+                                LO(S7_ICON_GR3),
+                                LO(S7_ICON_GR4),
+                                LO(S7_ICON_GR5),
+                                LO(S7_ICON_GR6)                                                                
+                              };
+
+// ASCII Font definition table for transmission to TM1650
+//
+//#define FONT_7S_START     0x20
+//#define FONT_7S_END       0x7F
+//#define FONT_7S_NR_CHARS (FONT_7_END - FONT_7S_START + 1)
+
+#if (SHOW_ASCII == 1)
+//display all ASCII characters
+const short FONT_7S[]  = { 
+                             C7_SPC, //32 0x20, Space
+                             C7_EXC,
+                             C7_QTE,
+                             C7_HSH,
+                             C7_DLR,
+                             C7_PCT,
+                             C7_AMP,
+                             C7_ACC,
+                             C7_LBR,
+                             C7_RBR,                   
+                             C7_MLT,                            
+                             C7_PLS,
+                             C7_CMA,
+                             C7_MIN,
+                             C7_DPT,                             
+                             C7_RS,
+                             C7_0,   //48 0x30
+                             C7_1,
+                             C7_2,
+                             C7_3,
+                             C7_4,                   
+                             C7_5,
+                             C7_6,
+                             C7_7,
+                             C7_8,
+                             C7_9,
+                             C7_COL, //58 0x3A
+                             C7_SCL,
+                             C7_LT,
+                             C7_EQ,
+                             C7_GT,
+                             C7_QM,                             
+                             C7_AT,  //64 0x40
+                             C7_A,   //65 0x41, A
+                             C7_B,
+                             C7_C,
+                             C7_D,
+                             C7_E,
+                             C7_F,
+                             C7_G,
+                             C7_H,
+                             C7_I,
+                             C7_J,                   
+                             C7_K,
+                             C7_L,
+                             C7_M,
+                             C7_N,
+                             C7_O,
+                             C7_P,
+                             C7_Q,
+                             C7_R,
+                             C7_S,
+                             C7_T,
+                             C7_U,
+                             C7_V,
+                             C7_W,
+                             C7_X,
+                             C7_Y,
+                             C7_Z,   //90 0x5A, Z
+                             C7_SBL, //91 0x5B
+                             C7_LS,
+                             C7_SBR,
+                             C7_PWR,
+                             C7_UDS,  
+                             C7_ACC,                             
+                             C7_A,   //97 0x61, A replacing a
+                             C7_B,
+                             C7_C,
+                             C7_D,
+                             C7_E,
+                             C7_F,
+                             C7_G,
+                             C7_H,
+                             C7_I,
+                             C7_J,                   
+                             C7_K,
+                             C7_L,
+                             C7_M,
+                             C7_N,
+                             C7_O,
+                             C7_P,
+                             C7_Q,
+                             C7_R,
+                             C7_S,
+                             C7_T,
+                             C7_U,
+                             C7_V,
+                             C7_W,
+                             C7_X,
+                             C7_Y,
+                             C7_Z,   // 122 0x7A, Z replacing z
+                             C7_CBL, // 123 0x7B
+                             C7_OR,
+                             C7_CBR,
+                             C7_TLD,
+                             C7_DEL  // 127                             
+                        };
+ 
+#else
+//display only digits and hex characters
+const short FONT_7S[] = { 
+                           C7_0, //48 0x30
+                           C7_1,
+                           C7_2,
+                           C7_3,
+                           C7_4,                   
+                           C7_5,
+                           C7_6,
+                           C7_7,
+                           C7_8,
+                           C7_9,
+                           C7_A, //65 0x41, A
+                           C7_B,
+                           C7_C,
+                           C7_D,
+                           C7_E,
+                           C7_F
+                        };// 127
+#endif
+  
+#endif 
\ No newline at end of file

diff -r 000000000000 -r 4430a1559b4f Font_7Seg.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Font_7Seg.h	Tue Oct 10 18:38:46 2017 +0000
@@ -0,0 +1,255 @@
+/* mbed LED Font Library, for TM1650 LED Controller
+ * Copyright (c) 2017, v01: WH, Initial version, Test in MEIBAI
+ *
+ * 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_FONT_7SEG_H
+#define MBED_FONT_7SEG_H
+
+// Select one of the testboards for TM1650 controller
+#include "TM1650_Config.h"
+
+#if ((MEIBAI_TEST == 1) || (TM1650_TEST == 1))
+// Segment bit positions for 7 Segment display using the MEIBAI and ROBOTDYN mapping for TM1650
+// Modify this table for different 'bit-to-segment' mappings. The ASCII character defines and the FONT_7S const table below 
+// will be adapted automatically according to the bit-to-segment mapping. Obviously this will only work when the segment
+// mapping is identical for every digit position. This will be the case unless the hardware designer really hates software developers.
+//
+//            A
+//          -----
+//         |     |     
+//       F |     | B    
+//         |  G  |     
+//          -----
+//         |     |     
+//       E |     | C    
+//         |     |     
+//          -----   * DP
+//            D  
+//
+#define S7_A    0x0001
+#define S7_B    0x0002
+#define S7_C    0x0004
+#define S7_D    0x0008
+#define S7_E    0x0010
+#define S7_F    0x0020
+#define S7_G    0x0040 
+#define S7_DP   0x0080 
+
+//Mask for blending out and setting 7 segments digits
+#define MASK_7S_ALL = (S7_A | S7_B | S7_C | S7_D | S7_E | S7_F | S7_G}
+
+//The CATALAX mapping between Digit positions or Columns (Left to Right) and Grids (ie memory address) are:
+//The column numbers are:
+//   0   1   2   3
+//The Grids are:
+//  GR1 GR2 GR3 GR4
+//The memory addresses are:
+//   0   1   2   3
+
+
+//The ROBOTDYN mapping between Digit positions or columns (Left to Right) and Grids (ie memory address) are:
+//The column numbers are:
+//   0   1   2   3   4   5
+//The Grids are:
+//  GR3 GR2 GR1 GR6 GR5 GR4
+//The memory addresses are:
+//   2   1   0   5   4   3
+
+
+//The EYEWINK mapping between Digit positions or columns (Left to Right) and Grids (ie memory address) are:
+//The column numbers are:
+//   0   1   2   3   4   5
+//The Grids are:
+//  GR1 GR2 GR3 GR4 GR5 GR6
+//The memory addresses are:
+//   0   1   2   3   4   5
+
+
+//Icons Grid 1
+#define S7_DP1  0x0080
+#define S7_ICON_GR1 (0x0000)
+//#define S7_ICON_GR1 (S7_DP1)
+
+//Icons Grid 2
+#define S7_DP2  0x0080
+#define S7_COL2 0x0080
+#define S7_ICON_GR2 (0x0000)
+//#define S7_ICON_GR2 (S7_DP2)
+
+//Icons Grid 3
+#define S7_DP3  0x0080
+#define S7_ICON_GR3 (0x0000)
+//#define S7_ICON_GR3 (S7_DP3)
+
+//Icons Grid 4
+#define S7_DP4  0x0080
+#define S7_ICON_GR4 (0x0000)
+//#define S7_ICON_GR4 (S7_DP4)
+
+//Icons Grid 5
+#define S7_DP5  0x0080
+#define S7_ICON_GR5 (0x0000)
+//#define S7_ICON_GR5 (S7_DP5)
+
+//Icons Grid 6
+#define S7_DP6  0x0080
+#define S7_ICON_GR6 (0x0000)
+//#define S7_ICON_GR6 (S7_DP6)
+
+
+//Mask for blending out and restoring Icons
+extern const char MASK_ICON_GRID[]; 
+#endif
+
+
+// ASCII Font definitions for segments in each character
+//
+//32 0x20  Symbols
+#define C7_SPC  (0x0000)
+#define C7_EXC  (S7_B | S7_C) //!
+#define C7_QTE  (S7_B | S7_F) //"
+#define C7_HSH  (S7_C | S7_D | S7_E | S7_G) //#
+#define C7_DLR  (S7_A | S7_C | S7_D | S7_F | S7_G) //$
+#define C7_PCT  (S7_C | S7_F) //%
+#define C7_AMP  (S7_A | S7_C | S7_D | S7_E | S7_F | S7_G) //&
+#define C7_ACC  (S7_B) //'
+#define C7_LBR  (S7_A | S7_D | S7_E | S7_F) //(
+#define C7_RBR  (S7_A | S7_B | S7_C | S7_D) //)
+#define C7_MLT  (S7_B | S7_C | S7_E | S7_F | S7_G)  //*
+#define C7_PLS  (S7_B | S7_C | S7_G) //+
+#define C7_CMA  (S7_DP)
+#define C7_MIN  (S7_G)
+#define C7_DPT  (S7_DP)
+#define C7_RS   (S7_B | S7_E  | S7_G)  // /
+
+//48 0x30  Digits
+#define C7_0    (S7_A | S7_B | S7_C | S7_D | S7_E | S7_F)
+#define C7_1    (S7_B | S7_C)
+#define C7_2    (S7_A | S7_B | S7_D | S7_E | S7_G)
+#define C7_3    (S7_A | S7_B | S7_C | S7_D | S7_G)
+#define C7_4    (S7_B | S7_C | S7_F | S7_G)
+#define C7_5    (S7_A | S7_C | S7_D | S7_F | S7_G)
+#define C7_6    (S7_A | S7_C | S7_D | S7_E | S7_F | S7_G)
+#define C7_7    (S7_A | S7_B | S7_C)
+#define C7_8    (S7_A | S7_B | S7_C | S7_D | S7_E | S7_F | S7_G)
+#define C7_9    (S7_A | S7_B | S7_C | S7_D | S7_F | S7_G)
+
+//58 0x3A
+#define C7_COL  (S7_D | S7_G) // :
+#define C7_SCL  (S7_D | S7_G) // ;
+#define C7_LT   (S7_D | S7_E | S7_G)             // <
+#define C7_EQ   (S7_D | S7_G)                    // =
+#define C7_GT   (S7_C | S7_D | S7_G)             // >   
+#define C7_QM   (S7_A | S7_B | S7_E | S7_G)      // ?
+#define C7_AT   (S7_A | S7_B | S7_C | S7_D | S7_E  | S7_G)  // @
+
+//65 0x41  Upper case alphabet
+#define C7_A    (S7_A | S7_B | S7_C | S7_E | S7_F | S7_G )
+#define C7_B    (S7_C | S7_D | S7_E | S7_F | S7_G)
+#define C7_C    (S7_A | S7_D | S7_E | S7_F)
+#define C7_D    (S7_B | S7_C | S7_D | S7_E | S7_G)
+#define C7_E    (S7_A | S7_D | S7_E | S7_F | S7_G)
+#define C7_F    (S7_A | S7_E | S7_F | S7_G)
+
+#define C7_G    (S7_A | S7_C | S7_D | S7_E | S7_F)
+#define C7_H    (S7_B | S7_C | S7_E | S7_F | S7_G)
+#define C7_I    (S7_B | S7_C)
+#define C7_J    (S7_B | S7_C | S7_D | S7_E)
+#define C7_K    (S7_B | S7_C | S7_E | S7_F | S7_G)
+#define C7_L    (S7_D | S7_E | S7_F)
+#define C7_M    (S7_A | S7_C | S7_E)
+#define C7_N    (S7_A | S7_B | S7_C | S7_E | S7_F)
+#define C7_O    (S7_A | S7_B | S7_C | S7_D | S7_E | S7_F)
+#define C7_P    (S7_A | S7_B | S7_E | S7_F | S7_G)
+#define C7_Q    (S7_A | S7_B | S7_C | S7_F | S7_G)
+#define C7_R    (S7_E | S7_G )
+#define C7_S    (S7_A | S7_C | S7_D | S7_F | S7_G)
+#define C7_T    (S7_D | S7_E | S7_F | S7_G)
+#define C7_U    (S7_B | S7_C | S7_D | S7_E | S7_F)
+#define C7_V    (S7_B | S7_C | S7_D | S7_E | S7_F)
+#define C7_W    (S7_B | S7_D | S7_F)
+#define C7_X    (S7_B | S7_C | S7_E | S7_F | S7_G)
+#define C7_Y    (S7_B | S7_C | S7_D | S7_F | S7_G)
+#define C7_Z    (S7_A | S7_B | S7_D | S7_E | S7_G)
+
+//91 0x5B
+#define C7_SBL  (S7_A | S7_D | S7_E | S7_F) // [
+#define C7_LS   (S7_C | S7_F | S7_G)        // left slash
+#define C7_SBR  (S7_A | S7_B | S7_C | S7_D) // ]
+#define C7_PWR  (S7_A | S7_B | S7_F)        // ^
+#define C7_UDS  (S7_D)                      // _
+#define C7_DSH  (S7_F)                      // `  
+
+//97 0x61  Lower case alphabet
+#define C7_a     C7_A
+#define C7_b     C7_B
+#define C7_c     C7_C
+#define C7_d     C7_D
+#define C7_e     C7_E
+#define C7_f     C7_H
+
+#define C7_g     C7_G
+#define C7_h     C7_H
+#define C7_i     C7_I
+#define C7_j     C7_J
+#define C7_k     C7_K
+#define C7_l     C7_L
+#define C7_m     C7_M
+//#define C7_n     C7_N
+#define C7_n    (S7_C | S7_E | S7_G)
+//#define C7_o     C7_O
+#define C7_o    (S7_C | S7_D | S7_E | S7_G)
+#define C7_p     C7_P
+#define C7_q     C7_Q
+//#define C7_r     C7_R
+#define C7_r    (S7_E | S7_G)
+#define C7_s     C7_S
+#define C7_t     C7_T
+#define C7_u     C7_U
+#define C7_v     C7_V
+#define C7_w     C7_W
+#define C7_x     C7_X
+#define C7_y     C7_Y
+#define C7_z     C7_Z
+
+//123 0x7B
+#define C7_CBL  (S7_A | S7_D | S7_E | S7_F)        // {
+#define C7_OR   (S7_B | S7_C)                      // |
+#define C7_CBR  (S7_A | S7_B | S7_C | S7_D)        // }
+#define C7_TLD  (S7_B | S7_E | S7_G )              // ~
+#define C7_DEL  (0x0000)
+
+
+//User Defined Characters (some examples)
+#define C7_DGR   (S7_A | S7_B | S7_F | S7_G)  //Degrees
+                                                                         
+// Font data selection for transmission to TM1650 memory
+#define LO(x)  ( x & 0xFF)
+#define HI(x)  ((x >> 8) & 0xFF)
+
+
+// ASCII Font definition table
+//
+#define FONT_7S_START     0x20
+#define FONT_7S_END       0x7F
+//#define FONT_7S_NR_CHARS (FONT_7S_END - FONT_7S_START + 1)
+extern const short FONT_7S[]; 
+
+#endif   
\ No newline at end of file

diff -r 000000000000 -r 4430a1559b4f TM1650.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TM1650.cpp	Tue Oct 10 18:38:46 2017 +0000
@@ -0,0 +1,542 @@
+/* mbed TM1650 Library, for TM1650 LED controller
+ * 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, inclumosig 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, INCLUmosiG 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 "TM1650.h"
+
+/** Constructor for class for driving TM1650 LED controller with Serial bus interface device. 
+ *  @brief Supports 4 digits @ 8 segments. Also supports upto 28 Keys.
+ *   
+ *  @param  PinName dio Serial bus DIO pin 
+ *  @param  PinName clk Serial bus CLK pin
+*/
+TM1650::TM1650(PinName dio, PinName clk) : _dio(dio), _clk(clk) {
+
+  _init();
+}
+
+
+/** Init the Serial interface and the controller
+  * @param  none
+  * @return none
+  */ 
+void TM1650::_init(){
+  
+//TM1650 uses a Serial bus that looks like I2C, but really is not.
+//It has Start and Stop conditions like I2C and an Ack pulse, but instead of slaveaddresses and a RW bit it just transmits commands and data.
+
+//init Serial bus
+  _dio.output();
+//  _dio.mode(PullUp);
+  wait_us(1);
+
+  _dio=1;  
+  _clk=1;  
+
+//init controller  
+  _bright  = TM1650_BRT_DEF; 
+  _segment = TM1650_DSP_8S; 
+  _display = TM1650_DSP_ON;  
+  _writeCmd(TM1650_DSP_CTRL_CMD, _bright | _segment | _display );  // Display control cmd, brightness, 7/8 segments, display on/off
+}   
+
+
+/** Clear the screen and locate to 0
+ */  
+void TM1650::cls() {
+
+  for (int cnt=0; cnt<TM1650_DISPLAY_MEM; cnt++) {
+    _start();     
+    _write(TM1650_DATA_WR_CMD | (cnt << 1)); // Set Address cmd (no auto incr supported)
+    _write(0x00);                            // Write data 
+    _stop();      
+  }
+
+}  
+
+/** Set Brightness
+  *
+  * @param  char brightness (3 significant bits, valid range 0..7 (1/16 .. 14/14 dutycycle)  
+  * @return none
+  */
+void TM1650::setBrightness(char brightness){
+
+  _bright = brightness & TM1650_BRT_MSK; // mask invalid bits
+  
+  _writeCmd(TM1650_DSP_CTRL_CMD, _bright | _segment | _display );  // Display control cmd, brightness, 7/8 segments, display on/off
+}
+
+/** Set the Display mode On/off
+  *
+  * @param bool display mode
+  */
+void TM1650::setDisplay(bool on) {
+  
+  if (on) {
+    _display = TM1650_DSP_ON;
+  }
+  else {
+    _display = TM1650_DSP_OFF;
+  }
+  
+  _writeCmd(TM1650_DSP_CTRL_CMD, _bright | _segment | _display );  // Display control cmd, brightness, 7/8 segments, display on/off
+}
+
+/** Write databyte to TM1650
+  *  @param  int address display memory location to write byte
+  *  @param  char data byte written at given address
+  *  @return none
+  */ 
+void TM1650::writeData(char data, int address) {
+  
+  _start();
+
+  _write(TM1650_DATA_WR_CMD | ((address & TM1650_ADDR_MSK) << 1)); // Set Address cmd     
+  _write(data);                                                    // Write data 
+
+  _stop();  
+}
+
+/** Write Display datablock to TM1650
+  *  @param  DisplayData_t data Array of TM1650_DISPLAY_MEM (=4) bytes for displaydata
+  *  @param  length number bytes to write (valid range 0..(TM1650_MAX_NR_GRIDS * TM1650_BYTES_PER_GRID) (=4), when starting at address 0)  
+  *  @param  int address display memory location to write bytes (default = 0) 
+  *  @return none
+  */  
+void TM1650::writeData(DisplayData_t data, int length, int address) {
+
+// sanity check
+  address &= TM1650_ADDR_MSK;
+  if (length < 0) {length = 0;}
+  if ((length + address) > TM1650_DISPLAY_MEM) {length = (TM1650_DISPLAY_MEM - address);}
+    
+  for (int idx=0; idx<length; idx++) {    
+    _start();
+    _write(TM1650_DATA_WR_CMD | ((address + idx) << 1)); // Set Address cmd (no auto incr supported)
+    _write(data[address + idx]);                         // Write data 
+    _stop();      
+  }
+}
+
+/** Read keydata block from TM1650
+  *  @param  *keydata Ptr to bytes for keydata
+  *  @return bool keypress True when at least one key was pressed
+  */   
+bool TM1650::getKeys(KeyData_t *keydata) {
+
+  _start();
+
+  // Enable Key Read mode
+  _write(TM1650_KEY_RD_CMD); // Read Key cmd
+
+  // Read key
+  *keydata = _read();
+//  printf("Key = 0x%02x\r\n", *keydata);  // debug
+
+  _stop();  
+      
+  // Check if valid key bits are set
+  return ( (*keydata & TM1650_SW_MSK) == TM1650_SW_MSK );
+}
+  
+
+/** Generate Start condition for TM1650
+  *  @param  none
+  *  @return none
+  */ 
+void TM1650::_start() {
+
+  _dio=0;
+  wait_us(1);
+  _clk=0;
+  wait_us(1);
+}
+  
+/** Generate Stop condition for TM1650
+  *  @param  none
+  *  @return none
+  */ 
+void TM1650::_stop() {
+
+  _dio=0;
+  wait_us(1);  
+  _clk=1;
+  wait_us(1);
+  _dio=1;
+  wait_us(1);
+}
+
+/** Send byte to TM1650
+  *  @param  int data
+  *  @return none
+  */ 
+void TM1650::_write(int data) {
+ 
+  for (int bit=7; bit >= 0; bit--) {    
+    //The TM1650 expects MSB first
+    if (((data >> bit) & 0x01) == 0x01) {
+      _dio=1;      
+    }
+    else {    
+      _dio=0;      
+    }  
+    wait_us(1);
+    _clk=1;
+    wait_us(1);
+    _clk=0;  
+    wait_us(1);
+  }  
+
+  _dio=1;
+  
+  // Prepare DIO to read data
+  _dio.input();
+  wait_us(3);
+      
+  // dummy Ack
+  _clk=1;
+  wait_us(1);
+//  _ack = _dio;  
+  _clk=0;  
+  wait_us(1); 
+  
+  // Return DIO to output mode
+  _dio.output();  
+  wait_us(3);  
+
+  _dio=1; //idle  
+}
+
+/** Read byte from TM1650
+  *  @param  none
+  *  @return read byte 
+  */ 
+char TM1650::_read() {
+  char keycode = 0;
+
+  // Prepare DIO to read data
+  _dio.input();
+  wait_us(3);
+    
+  for (int bit=0; bit<8; bit++) {    
+   
+    //The TM1650 sends bitpattern: D7..D0
+    //Data is shifted out by the TM1650 on the falling edge of CLK
+    //Observe sufficient delay to allow the Open Drain DIO to rise to H levels
+    // Prepare to read next bit, MSB (ie D7) first. 
+    keycode = keycode << 1;  
+
+    _clk=1;
+    wait_us(1);
+    
+    // Read next bit
+    if (_dio) { keycode |= 0x01; }        
+
+    _clk=0;        
+    wait_us(5); // Delay to allow for slow risetime
+  }  
+  
+  // Return DIO to output mode
+  _dio.output();
+  wait_us(3);  
+
+  // dummy Ack
+  _dio=0; //Ack   
+  wait_us(1);
+  
+  _clk=1;
+  wait_us(1);
+  _clk=0;  
+  wait_us(1); 
+
+  _dio=1; //idle
+
+  return keycode;
+}
+
+/** Write command (and parameters) to TM1650
+  *  @param  int cmd Command byte
+  *  @Param  int data Parameters for command
+  *  @return none
+  */  
+void TM1650::_writeCmd(int cmd, int data){
+    
+  _start();
+
+  _write(cmd);   
+  _write(data);  
+   
+  _stop();          
+}  
+
+
+#if (MEIBAI_TEST == 1) 
+// Derived class for TM1650 used in MEIBAI display unit
+//
+
+/** Constructor for class for driving TM1650 LED controller
+ *
+ * @brief Supports 4 Digits of 7 Segments + DP.
+ *        Also supports 3 keys.
+ *        Serial bus interface device. 
+ *
+ *  @param  PinName dio Serial bus DIO pin
+ *  @param  PinName sck Serial bus CLK pin 
+ */
+TM1650_MEIBAI::TM1650_MEIBAI(PinName dio, PinName clk) : TM1650(dio, clk) {
+  _column  = 0;
+  _columns = MEIBAI_NR_DIGITS;    
+}  
+
+#if(0)
+#if DOXYGEN_ONLY
+    /** Write a character to the Display
+     *
+     * @param c The character to write to the display
+     * @return c
+     */
+    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
+#endif
+
+/** Locate cursor to a screen column
+  *
+  * @param column  The horizontal position from the left, indexed from 0
+  * @return none  
+  */
+void TM1650_MEIBAI::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 TM1650_MEIBAI::columns() {
+    return _columns;
+}
+
+    
+/** Clear the screen and locate to 0
+  * 
+  * @param bool clrAll Clear Icons also (default = false)
+  * @return none  
+  */ 
+void TM1650_MEIBAI::cls(bool clrAll) {  
+
+  if (clrAll) {
+    //clear local buffer (inclumosig Icons)
+    for (int idx=0; idx < MEIBAI_NR_GRIDS; idx++) {
+      _displaybuffer[idx] = 0x00;  
+    }
+  }  
+  else {
+    //clear local buffer (preserving Icons)
+    for (int idx=0; idx < MEIBAI_NR_GRIDS; idx++) {
+      _displaybuffer[idx] = _displaybuffer[idx] & MASK_ICON_GRID[idx];  
+    }  
+  }
+
+  writeData(_displaybuffer, (MEIBAI_NR_GRIDS * TM1650_BYTES_PER_GRID), 0);
+
+  _column = 0;   
+}     
+
+/** Set Icon
+  *
+  * @param Icon icon Enums Icon has Grid position encoded in 8 MSBs, Icon pattern encoded in 16 LSBs
+  * @return none
+  */
+void TM1650_MEIBAI::setIcon(Icon icon) {
+  int addr, icn;
+
+   icn =        icon  & 0xFFFF;
+  addr = (icon >> 24) & 0xFF; 
+  addr = (addr - 1);
+    
+  //Save char...and set bits for icon to write
+  _displaybuffer[addr] = _displaybuffer[addr] | LO(icn);      
+//  writeData(_displaybuffer, (MEIBAI_NR_GRIDS * TM1650_BYTES_PER_GRID), 0);
+  writeData(_displaybuffer, TM1650_BYTES_PER_GRID, addr);  
+}
+
+/** Clr Icon
+  *
+  * @param Icon icon Enums Icon has Grid position encoded in 8 MSBs, Icon pattern encoded in 16 LSBs
+  * @return none
+  */
+void TM1650_MEIBAI::clrIcon(Icon icon) {
+  int addr, icn;
+
+   icn =        icon  & 0xFFFF;
+  addr = (icon >> 24) & 0xFF; 
+  addr = (addr - 1);
+    
+  //Save char...and clr bits for icon to write
+  _displaybuffer[addr] = _displaybuffer[addr] & ~LO(icn);      
+//  writeData(_displaybuffer, (MEIBAI_NR_GRIDS * TM1650_BYTES_PER_GRID), 0);
+  writeData(_displaybuffer, TM1650_BYTES_PER_GRID, addr);    
+}
+
+
+/** 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 (8 bits)
+  * @return none  
+  */
+void TM1650_MEIBAI::setUDC(unsigned char udc_idx, int udc_data) {
+
+  //Sanity check
+  if (udc_idx > (MEIBAI_NR_UDC-1)) {
+    return;
+  }
+  // Mask out Icon bits?
+
+  _UDC_7S[udc_idx] = LO(udc_data);
+}
+
+
+/** Write a single character (Stream implementation)
+  *
+  * @param c The character to write to the display
+  * @return c
+  */
+int TM1650_MEIBAI::_putc(int value) {
+//The MEIBAI mapping between Digit positions (Left to Right) and Grids is:
+//  GR1 GR2 GR3 GR4
+//The memory addresses or column numbers are:
+//   0   1   2   3
+    
+    int addr;
+    bool validChar = false;
+    char pattern   = 0x00;
+    
+    if ((value == '\n') || (value == '\r')) {
+      //No character to write
+      validChar = false;
+      
+      //Update Cursor      
+      _column = 0;
+    }
+    else if ((value == '.') || (value == ',')) {
+      //No character to write
+      validChar = false;
+      pattern = S7_DP; // placeholder for all DPs
+      
+      // Check to see that DP can be shown for current column
+      if (_column > 0) {
+        //Translate between _column and displaybuffer entries
+        //Add DP to bitpattern of digit left of current column.
+        addr = (_column - 1);
+      
+        //Save icons...and set bits for decimal point to write
+        _displaybuffer[addr] = _displaybuffer[addr] | pattern;
+//        writeData(_displaybuffer, (MEIBAI_NR_GRIDS * TM1650_BYTES_PER_GRID));
+        writeData(_displaybuffer, TM1650_BYTES_PER_GRID, addr); 
+        
+        //No Cursor Update
+      }
+    }
+    else if ((value >= 0) && (value < MEIBAI_NR_UDC)) {
+      //Character to write
+      validChar = true;
+      pattern = _UDC_7S[value];
+    }  
+    
+#if (SHOW_ASCII == 1)
+    //display all ASCII characters
+    else if ((value >= FONT_7S_START) && (value <= FONT_7S_END)) {   
+      //Character to write
+      validChar = true;
+      pattern = FONT_7S[value - FONT_7S_START];
+    } // else
+#else    
+    //display only digits and hex characters      
+    else if (value == '-') {
+      //Character to write
+      validChar = true;
+      pattern = C7_MIN;         
+    }
+    else if ((value >= (int)'0') && (value <= (int) '9')) {   
+      //Character to write
+      validChar = true;
+      pattern = FONT_7S[value - (int) '0'];
+    }
+    else if ((value >= (int) 'A') && (value <= (int) 'F')) {   
+      //Character to write
+      validChar = true;
+      pattern = FONT_7S[10 + value - (int) 'A'];
+    }
+    else if ((value >= (int) 'a') && (value <= (int) 'f')) {   
+      //Character to write
+      validChar = true;
+      pattern = FONT_7S[10 + value - (int) 'a'];
+    } //else
+#endif
+
+    if (validChar) {
+      //Character to write
+ 
+      //Translate between _column and displaybuffer entries
+      addr = _column;
+
+      //Save icons...and set bits for character to write
+      _displaybuffer[addr] = (_displaybuffer[addr] & MASK_ICON_GRID[_column]) | pattern;
+
+//      writeData(_displaybuffer, (MEIBAI_NR_GRIDS * TM1650_BYTES_PER_GRID));
+      writeData(_displaybuffer, TM1650_BYTES_PER_GRID, addr);        
+                                
+      //Update Cursor
+      _column++;
+      if (_column > (MEIBAI_NR_DIGITS - 1)) {
+        _column = 0;
+      }
+
+    } // if validChar           
+
+    return value;
+}
+
+
+/** Get a single character (Stream implementation)
+  *
+  * @param none
+  * @return -1
+  */
+int TM1650_MEIBAI::_getc() {
+    return -1;
+}
+
+#endif

diff -r 000000000000 -r 4430a1559b4f TM1650.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TM1650.h	Tue Oct 10 18:38:46 2017 +0000
@@ -0,0 +1,413 @@
+/* mbed TM1650 Library, for TM1650 LED controller
+ * 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, inclumosig 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, INCLUmosiG 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 TM1650_H
+#define TM1650_H
+
+// Select one of the testboards for TM1650 LED controller
+#include "TM1650_Config.h"
+
+/** An interface for driving TM1650 LED controller
+ *
+ * @code
+ * #include "mbed.h"
+ * #include "TM1650.h" 
+ * 
+ * Serial pc(USBTX, USBRX);
+ *
+ * //DisplayData_t size is 4 bytes (4 grids @ 8 segments)
+ * TM1650::DisplayData_t all_str  = {0xFF, 0xFF, 0xFF, 0xFF};  
+ *
+ * // KeyData_t size is 1 bytes  
+ * TM1650::KeyData_t keydata; 
+ *
+ * // TM1650 declaration, Select the desired type in TM1650_Config.h
+ * TM1650_MEIBAI MEIBAI(p6, p7);       //LPC1768
+ * //TM1650_MEIBAI MEIBAI(D9, D10);      //F401
+ *
+ * int main() {
+ *   MEIBAI.cls(); 
+ *   MEIBAI.writeData(all_str);
+ *   wait(1);
+ *   MEIBAI.setBrightness(TM1650_BRT0);
+ *   wait(1);
+ *   MEIBAI.setBrightness(TM1650_BRT3);
+ *
+ *   while (1) {
+ *     MEIBAI.cls(); 
+ *     wait(0.5); 
+ *     MEIBAI.writeData(all_str);
+ *     wait(1.0);
+ *     MEIBAI.cls(); 
+ *     MEIBAI.printf(" HI ");  
+ *     wait(1.0); 
+ *
+ *     // Check and read keydata
+ *     if (MEIBAI.getKeys(&keydata)) {
+ *       pc.printf("Keydata = 0x%02x\r\n", keydata);
+ *
+ *       if (keydata == TM1650_SW1_BIT) { //sw1  
+ *         MEIBAI.cls(); 
+ *         MEIBAI.printf("--01"); 
+ *       }  
+ *     } // Check keydata
+ *   } // while 
+ * }
+ * @endcode
+ */
+
+
+//TM1650 Display data
+#define TM1650_MAX_NR_GRIDS    4
+#define TM1650_BYTES_PER_GRID  1
+
+//Significant bits Keymatrix data
+//#define TM1638_KEY_MSK      0xFF 
+
+//Memory size in bytes for Display and Keymatrix
+#define TM1650_DISPLAY_MEM  (TM1650_MAX_NR_GRIDS * TM1650_BYTES_PER_GRID)
+#define TM1650_KEY_MEM         1
+
+//Data write command
+//Valid data addresses are 0x68, 0x6A, 0x6C, 0x6E
+#define TM1650_DATA_WR_CMD  0x68
+#define TM1650_ADDR_MSK     0x03 //0..3
+
+//Display control command
+#define TM1650_DSP_CTRL_CMD 0x48
+
+#define TM1650_BRT_MSK      0x70
+//#define TM1650_BRT_SHFT        4
+#define TM1650_BRT0         0x10 //Pulsewidth 1/16
+#define TM1650_BRT1         0x20
+#define TM1650_BRT2         0x30
+#define TM1650_BRT3         0x40
+#define TM1650_BRT4         0x50
+#define TM1650_BRT5         0x60
+#define TM1650_BRT6         0x70
+#define TM1650_BRT7         0x00 //Pulsewidth 15/16
+
+#define TM1650_BRT_DEF      TM1650_BRT3
+
+#define TM1650_DSP_8S       0x00
+#define TM1650_DSP_7S       0x08
+
+#define TM1650_DSP_OFF      0x00
+#define TM1650_DSP_ON       0x01
+
+
+//Keydata read command
+#define TM1650_KEY_RD_CMD   0x49
+
+//Access to 28 Switches
+//d7 d6 d5 d4 d3 d2 d1 d0
+// .  1  .  .  .  1  .  .   = Valid Key
+#define TM1650_SW_MSK       0x44
+
+//A -> Dig1 .. Dig4
+#define TM1650_SW1_BIT      0x44
+#define TM1650_SW2_BIT      0x45
+#define TM1650_SW3_BIT      0x46
+#define TM1650_SW4_BIT      0x47
+//B -> Dig1 .. Dig4
+#define TM1650_SW5_BIT      0x4C
+#define TM1650_SW6_BIT      0x4D
+#define TM1650_SW7_BIT      0x4E
+#define TM1650_SW8_BIT      0x4F
+//C -> Dig1 .. Dig4
+#define TM1650_SW9_BIT      0x54
+#define TM1650_SW10_BIT     0x55
+#define TM1650_SW11_BIT     0x56
+#define TM1650_SW12_BIT     0x57
+//D -> Dig1 .. Dig4
+#define TM1650_SW13_BIT     0x5C
+#define TM1650_SW14_BIT     0x5D
+#define TM1650_SW15_BIT     0x5E
+#define TM1650_SW16_BIT     0x5F
+//E -> Dig1 .. Dig4
+#define TM1650_SW17_BIT     0x64
+#define TM1650_SW18_BIT     0x65
+#define TM1650_SW19_BIT     0x66
+#define TM1650_SW20_BIT     0x67
+//F -> Dig1 .. Dig4
+#define TM1650_SW21_BIT     0x6C
+#define TM1650_SW22_BIT     0x6D
+#define TM1650_SW23_BIT     0x6E
+#define TM1650_SW24_BIT     0x6F
+//G -> Dig1 .. Dig4
+#define TM1650_SW25_BIT     0x74
+#define TM1650_SW26_BIT     0x75
+#define TM1650_SW27_BIT     0x76
+#define TM1650_SW28_BIT     0x77
+
+
+
+/** A class for driving TM1650 LED controller
+ *
+ * @brief Supports 4 Grids @ 8 Segments and upto 28 Keys. 
+ *        Serial bus interface device. 
+ */
+class TM1650 {
+ public:
+
+  /** Datatype for displaydata */
+  typedef char DisplayData_t[TM1650_DISPLAY_MEM];
+
+  /** Datatypes for keymatrix data */
+  typedef char KeyData_t;
+
+ /** Constructor for class for driving TM1650 LED controller
+  *
+  * @brief Supports 4 Grids @ 8 segments and 28 Keys. 
+  *        Serial bus interface device. 
+  *
+  *  @param  PinName dio Serial bus DIO pin
+  *  @param  PinName sck Serial bus CLK pin 
+  */
+  TM1650(PinName dio, PinName clk);
+
+
+  /** Clear the screen and locate to 0
+   */ 
+  void cls();  
+
+  /** Write databyte to TM1650
+   *  @param  char data byte written at given address
+   *  @param  int address display memory location to write byte
+   *  @return none
+   */ 
+   void writeData(char data, int address); 
+
+   /** Write Display datablock to TM1650
+    *  @param  DisplayData_t data Array of TM1650_DISPLAY_MEM (=4) bytes for displaydata
+    *  @param  length number bytes to write (valid range 0..(TM1650_MAX_NR_GRIDS * TM1650_BYTES_PER_GRID) (=4), when starting at address 0)  
+    *  @param  int address display memory location to write bytes (default = 0) 
+    *  @return none
+    */ 
+    void writeData(DisplayData_t data, int length = (TM1650_MAX_NR_GRIDS * TM1650_BYTES_PER_GRID), int address = 0);
+
+  /** Read keydata block from TM1650
+   *
+   *  @param  *keydata Ptr to bytes for keydata
+   *  @return bool keypress True when at least one key was pressed
+   */   
+  bool getKeys(KeyData_t *keydata);
+
+  /** Set Brightness
+    *
+    * @param  char brightness (3 significant bits, valid range 0..7 (1/16 .. 14/16 dutycycle)  
+    * @return none
+    */
+  void setBrightness(char brightness = TM1650_BRT_DEF);
+  
+  /** Set the Display mode On/off
+    *
+    * @param bool display mode
+    * @return none
+    */
+  void setDisplay(bool on);
+  
+ private:  
+    DigitalInOut _dio;
+    DigitalOut   _clk;  
+
+    char _bright;
+    char _segment;
+    char _display;    
+  
+  /** Init the Serial interface and the controller
+    * @param  none
+    * @return none
+    */ 
+    void _init();
+
+  /** Generate Start condition for TM1650
+    *  @param  none
+    *  @return none
+    */ 
+    void _start();
+  
+  /** Generate Stop condition for TM1650
+    *  @param  none
+    *  @return none
+    */ 
+    void _stop();
+
+  /** Send byte to TM1650
+    *  @param  int data
+    *  @return none
+    */ 
+    void _write(int data);
+
+  /** Read byte from TM1650
+    *  @param  none  
+    *  @return read byte 
+    */ 
+    char _read();
+
+  /** Write command and parameter to TM1650
+    *  @param  int cmd Command byte
+    *  @Param  int data Parameters for command
+    *  @return none
+    */ 
+    void _writeCmd(int cmd, int data);  
+};
+
+#if (MEIBAI_TEST == 1) 
+// Derived class for TM1650 used in MEIBAI display unit with 4 Digits and 3 keys
+//
+
+#include "Font_7Seg.h"
+
+#define MEIBAI_NR_GRIDS  4
+#define MEIBAI_NR_DIGITS 4
+#define MEIBAI_NR_UDC    8
+
+
+/** Constructor for class for driving TM1650 controller as used in MEIBAI
+  *
+  *  @brief Supports 4 Digits of 7 Segments + DP. 
+  *         Also Supports 3 Keys. Serial bus interface device. 
+  *  
+  *  @param  PinName dio Serial bus DIO pin
+  *  @param  PinName sck Serial bus CLK pin  
+  */
+class TM1650_MEIBAI : public TM1650, public Stream {
+ public:
+
+  /** Enums for Icons */
+  //  Grid encoded in 8 MSBs, Icon pattern encoded in 16 LSBs
+  enum Icon {
+    DP1   = ( 1<<24) | S7_DP1,  /**<  Digit 1 */
+    DP2   = ( 2<<24) | S7_DP2,  /**<  Digit 2 */
+    DP3   = ( 3<<24) | S7_DP3,  /**<  Digit 3 */
+    DP4   = ( 4<<24) | S7_DP4,  /**<  Digit 4 */
+  };
+  
+  typedef char UDCData_t[MEIBAI_NR_UDC];
+
+
+ /** Constructor for class for driving TM1650 LED controller
+  *
+  * @brief Supports 4 Digits of 7 Segments + DP.
+  *        Also Supports 3 Keys. Serial bus interface device. 
+  *
+  *  @param  PinName dio Serial bus DIO pin
+  *  @param  PinName sck Serial bus CLK pin
+  */
+  TM1650_MEIBAI(PinName dio, PinName clk);
+
+  
+#if DOXYGEN_ONLY
+    /** Write a character to the Display
+     *
+     * @param c The character to write to the display
+     * @return c
+     */
+    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.
+     * @return chars written
+     */
+    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)
+     * @return none     
+     */
+    void cls(bool clrAll = false);
+
+    /** Set Icon
+     *
+     * @param Icon icon Enums Icon has Grid position encoded in 8 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 8 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)
+     * @return none            
+     */
+    void setUDC(unsigned char udc_idx, int udc_data);
+
+
+   /** Number of screen columns
+    *
+    * @param none
+    * @return columns
+    */
+    int columns();   
+
+   /** Write databyte to TM1650
+     *  @param  char data byte written at given address
+     *  @param  int address display memory location to write byte
+     *  @return none
+     */ 
+    void writeData(char data, int address){
+      TM1650::writeData(data, address);
+    }        
+
+   /** Write Display datablock to TM1650
+    *  @param  DisplayData_t data Array of TM1650_DISPLAY_MEM (=4) bytes for displaydata
+    *  @param  length number bytes to write (valid range 0..(MEIBAI_NR_GRIDS * TM1650_BYTES_PER_GRID) (=4), when starting at address 0)  
+    *  @param  int address display memory location to write bytes (default = 0)
+    *  @return none
+    */   
+    void writeData(DisplayData_t data, int length = (MEIBAI_NR_GRIDS * TM1650_BYTES_PER_GRID), int address = 0) {
+      TM1650::writeData(data, length, address);
+    }  
+
+protected:  
+    // Stream implementation functions
+    virtual int _putc(int value);
+    virtual int _getc();
+
+private:
+    int _column;
+    int _columns;   
+    
+    DisplayData_t _displaybuffer;
+    UDCData_t _UDC_7S; 
+};
+#endif
+
+#endif
\ No newline at end of file

diff -r 000000000000 -r 4430a1559b4f TM1650_Config.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TM1650_Config.h	Tue Oct 10 18:38:46 2017 +0000
@@ -0,0 +1,33 @@
+/* mbed TM1650 Library, for TM1650 LEDcontroller
+ * 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 TM1650_CONFIG_H
+#define TM1650_CONFIG_H
+
+// Select one of the testboards for TM1650 LED controller
+#define TM1650_TEST   0
+#define MEIBAI_TEST   1 
+
+// Select the display mode: only digits and hex or ASCII
+#define SHOW_ASCII    1 
+
+#endif
\ No newline at end of file