completely rewrite the driver.

using one class to descripe two kinds of display.
add two displays used simultaneously example.
use : setTubeType() to select which type of display is going to be used.
add : add comment ,modify configuration files.

grove_alphanumeric_display.h

@@ -0,0 +1,151 @@
+/* 
+ * grove_alphanumeric_display.h
+ * A library for Grove - grove_alphanumeric_display
+ *
+ * Copyright (c) 2018 seeed technology inc.
+ * Website    : www.seeed.cc
+ * Author     : Jerry Yip
+ * Create Time: 2018-06
+ * Version    : 0.1
+ * Change Log :
+ * Copyright (c) 2018 seeed technology inc.
+ * Website    : www.seeed.cc
+ * Author     : downey 
+ * Create Time: 2018-06
+ * Version    : 1.1
+ * Change Log :for digital tube development.
+ *
+ * The MIT License (MIT)
+ *
+ * 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 __GROVE_QUAD_ALPHANUMERIC_DISPLAY_H__
+#define __GROVE_QUAD_ALPHANUMERIC_DISPLAY_H__
+
+//#include "I2Cdev.h"
+#include <Arduino.h>
+#include "HT16K33_driver.h"
+
+// #define TYPE_4_DEFAULT_I2C_ADDR    0x75
+#define TYPE_4_DEFAULT_I2C_ADDR    0x71
+#define TYPE_2_DEFAULT_I2C_ADDR    0x70
+
+#define MAX_BIG_BUFFER_SIZE         (8*20)   
+
+#define MAX_TUBE_COUNT  4
+
+
+
+typedef enum
+{
+    FIRST_TUBE = 1,
+    SECOND_TUBE,
+    THIRD_TUBE,
+    FOURTH_TUBE,
+}TubeNum;
+
+typedef enum{
+    TYPE_2,
+    TYPE_4,
+}TubeType_t;
+
+
+typedef enum{
+    CNT_2 = 2,
+    CNT_4 = 4,
+}TubeCnt_t;
+
+class Seeee_Digital_Tube : public HT16K33 {
+
+public:
+    Seeee_Digital_Tube();
+
+    void setTubeType(TubeType_t type,uint8_t addr = TYPE_2_DEFAULT_I2C_ADDR);
+
+    void clear();
+    /**@brief Display number,If the param-num's len less than 4,The tubes display static number,otherwise,it displays scroll number.
+     * When it displays scroll number,the param interval is scrolling interval(ms) .. 
+     * @param num the number to display.
+     * @param interval :the interval of scroll number.
+     * */
+    void displayNum(uint32_t num,uint32_t interval = 0);
+
+    /**@brief Display string,If the param-str's len less than 4,The tubes display static string,otherwise,it displays scroll string.
+     * When it displays scroll string,the param interval is scrolling interval(ms) .. 
+     * @param str the str to display.
+     * @param interval :the interval of scroll string.
+     * */
+    void displayString(char *str,uint32_t interval = 0);
+    /**@brief Display all part of digital tube. 
+     * 
+     * */
+    void fulDisplay();
+
+    
+    /**@brief Clear _buffer,just clear. 
+     * 
+     * */
+    void clearBuf();
+    
+    
+    /**@brief Display the contents of _buffer. 
+     * 
+     * */
+    void display();
+
+    /**@brief Specify the display char of a digital tube. 
+     * @param tube_num The number of tube ,total 4.
+     * @param num ,The number to display
+     * */
+    void setTubeSingleChar(TubeNum tube_num,char c);
+
+    /**@brief Specify the display number of a digital tube. 
+     * @param tube_num The number of tube ,total 4.
+     * @param num ,The number to display
+     * */
+    void setTubeSingleNum(TubeNum tube_num,char num);
+
+    /**@brief Set two points status.
+     * @prarm upper_on if true,the upper point light on ,otherwise turn off; 
+     * @prarm lower_on if true,the upper point light on ,otherwise turn off; 
+     * */
+    void setPoint(bool first_dot,bool second_dot);
+private:
+    void display_one_tube(TubeNum tube_num,uint16_t value);
+    void replace_bit12(TubeNum tube_num,bool bit1,bool bit2);
+    void setTubeBuf(TubeNum tube_num,char byte);
+    int get_char_index(char c);
+    void shiftDisplay(char *origin_disp_buf,char new_item);
+    // Low1 High1 Low2 High2 ... Low8 High8
+    uint8_t _buffer[16]; 
+    //uint8_t _big_buffer[MAX_BIG_BUFFER_SIZE];
+    //uint16_t _cursor_start, _cursor_end, _cursor_steps;
+    uint16_t _ms;
+    //orientation_type_t _orientation;
+    //int8_t _offset_x, _offset_y;
+    bool isLegalToDisplay(char byte);
+
+    TubeType_t _type;  
+    TubeCnt_t  _tube_cnt;
+    uint16_t *disp_font_p;
+    
+};
+
+#endif //__GROVE_LED_MATRIX_DRIVER_HT16K33__