Diff: TM1638.h

Revision:

0:201dfacbe0e5

Child:

1:1f2453ed85d7

diff -r 000000000000 -r 201dfacbe0e5 TM1638.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TM1638.h	Mon Dec 21 22:39:22 2015 +0000
@@ -0,0 +1,337 @@
+/* mbed TM1638 Library, for TM1638 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 TM1638_H
+#define TM1638_H
+
+// Select one of the testboards for TM1638 LED controller
+#include "TM1638_Config.h"
+
+/** An interface for driving TM1638 LED controller
+ *
+ * @code
+ * #include "mbed.h"
+ * #include "TM1638.h" 
+ * 
+ * DisplayData_t size is 16 bytes (8 grids @ 10 segments)
+ * TM1638::DisplayData_t all_str  = {0xFF,0x3F, 0xFF,0x3F, 0xFF,0x3F, 0xFF,0x3F, 0xFF,0x3F, 0xFF,0x3F, 0xFF,0x3F, 0xFF,0x3F};  
+ *
+ * // KeyData_t size is 5 bytes  
+ * TM1638::KeyData_t keydata; 
+ *
+ * // TM1638 declaration
+ * TM1638 TM1638(p5,p6,p7, p8);
+ *
+ * int main() {
+ *   TM1638.cls(); 
+ *   TM1638.writeData(all_str);
+ *   wait(1);
+ *   TM1638.setBrightness(TM1638_BRT0);
+ *   wait(1);
+ *   TM1638.setBrightness(TM1638_BRT3);
+ *
+ *   while (1) {
+ *    // Check and read keydata
+ *    if (TM1638.getKeys(&keydata)) {
+ *      pc.printf("Keydata 0..3 = 0x%02x 0x%02x 0x%02x 0x%02x\r\n", keydata[0], keydata[1], keydata[2], keydata[3]);
+ *
+ *      if (keydata[0] == 0x10) { //sw2   
+ *        TM1638.cls(); 
+ *        TM1638.writeData(all_str);
+ *      }  
+ *    } 
+ *   }   
+ * }
+ * @endcode
+ */
+
+//Memory size in bytes for Display and Keymatrix
+#define TM1638_DISPLAY_MEM    16
+#define TM1638_KEY_MEM         4
+//Significant bits Keymatrix data
+#define TM1638_KEY_BITS        6 
+
+//Reserved bits for commands
+#define TM1638_CMD_MSK      0xC0
+
+//Data setting commands
+#define TM1638_DATA_SET_CMD 0x40
+#define TM1638_DATA_WR      0x00
+#define TM1638_KEY_RD       0x02
+#define TM1638_ADDR_INC     0x00
+#define TM1638_ADDR_FIXED   0x04
+#define TM1638_MODE_NORM    0x00
+#define TM1638_MODE_TEST    0x08
+
+//Address setting commands
+#define TM1638_ADDR_SET_CMD 0xC0
+#define TM1638_ADDR_MSK     0x0F
+
+//Display control commands
+#define TM1638_DSP_CTRL_CMD 0x80
+#define TM1638_BRT_MSK      0x07
+#define TM1638_BRT0         0x00 //Pulsewidth 1/16
+#define TM1638_BRT1         0x01
+#define TM1638_BRT2         0x02
+#define TM1638_BRT3         0x03
+#define TM1638_BRT4         0x04
+#define TM1638_BRT5         0x05
+#define TM1638_BRT6         0x06
+#define TM1638_BRT7         0x07 //Pulsewidth 14/16
+
+#define TM1638_BRT_DEF      TM1638_BRT3
+
+#define TM1638_DSP_OFF      0x00
+#define TM1638_DSP_ON       0x08
+
+
+/** A class for driving TM1638 LED controller
+ *
+ * @brief Supports 8 Grids @ 10 Segments. 
+ *        Also supports a scanned keyboard of upto 24 keys.
+ *        SPI bus interface device. 
+ */
+class TM1638 {
+ public:
+
+  /** Datatypes for display and keymatrix data */
+  typedef char DisplayData_t[TM1638_DISPLAY_MEM];
+  typedef char KeyData_t[TM1638_KEY_MEM];
+    
+ /** Constructor for class for driving TM1638 LED controller
+  *
+  * @brief Supports 8 Grids @ 10 segments. 
+  *        Also supports a scanned keyboard of upto 24 keys.
+  *        SPI bus interface device. 
+  *
+  *  @param  PinName mosi, miso, sclk, cs SPI bus pins
+  */
+  TM1638(PinName mosi, PinName miso, PinName sclk, PinName cs);
+      
+  /** Clear the screen and locate to 0
+   */ 
+  void cls();  
+
+  /** Write databyte to TM1638
+   *  @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 TM1638
+   *  @param  DisplayData_t data Array of TM1638_DISPLAY_MEM (=16) bytes for displaydata (starting at address 0)
+   *  @param  length number bytes to write (valid range 0..TM1638_DISPLAY_MEM (=16), starting at address 0)   
+   *  @return none
+   */   
+  void writeData(DisplayData_t data, int length = TM1638_DISPLAY_MEM);
+
+  /** Read keydata block from TM1638
+   *  @param  *keydata Ptr to Array of TM1638_KEY_MEM (=4) bytes for keydata
+   *  @return bool keypress True when at least one key was pressed
+   *
+   * Note: Due to the hardware configuration the TM1638 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 = TM1638_BRT_DEF);
+  
+  /** Set the Display mode On/off
+    *
+    * @param bool display mode
+    */
+  void setDisplay(bool on);
+  
+ private:  
+  SPI _spi;
+  DigitalOut _cs;
+  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 TM1638 expects LSB first, whereas SPI is MSB first
+    *  @param  char data
+    *  @return bitreversed data
+    */ 
+  char _flip(char data);
+
+  /** Write command and parameter to TM1638
+    *  @param  int cmd Command byte
+    *  &Param  int data Parameters for command
+    *  @return none
+    */ 
+  void _writeCmd(int cmd, int data);  
+};
+
+
+#if (LEDKEY8_TEST == 1) 
+// Derived class for TM1638 used in LED&KEY display unit
+//
+
+#include "Font_7Seg.h"
+
+#define LEDKEY8_NR_GRIDS  8
+#define LEDKEY8_NR_DIGITS 8
+#define LEDKEY8_DIG1_IDX  1
+#define LEDKEY8_NR_UDC    8
+
+/** Constructor for class for driving TM1638 controller as used in LEDKEY8
+  *
+  *  @brief Supports 8 Digits of 7 Segments + DP + LED Icons, Also supports a scanned keyboard of 8 keys.
+  *  
+  *  @param  PinName mosi, miso, sclk, cs SPI bus pins
+  */
+class TM1638_LEDKEY8 : public TM1638, public Stream {
+ public:
+
+  /** Enums for Icons */
+  //  Grid encoded in 8 MSBs, Icon pattern encoded in 24 LSBs
+  enum Icon {
+    LD1  = (1<<24) | S7_LD1,
+    LD2  = (2<<24) | S7_LD2,
+    LD3  = (3<<24) | S7_LD3,
+    LD4  = (4<<24) | S7_LD4,
+    LD5  = (5<<24) | S7_LD5,
+    LD6  = (6<<24) | S7_LD6,
+    LD7  = (7<<24) | S7_LD7,
+    LD8  = (8<<24) | S7_LD8,
+                                
+    DP1  = (1<<24) | S7_DP1,
+    DP2  = (2<<24) | S7_DP2,
+    DP3  = (3<<24) | S7_DP3,
+    DP4  = (4<<24) | S7_DP4,
+    DP5  = (5<<24) | S7_DP5,
+    DP6  = (6<<24) | S7_DP6,
+    DP7  = (7<<24) | S7_DP7,
+    DP8  = (8<<24) | S7_DP8                            
+  };
+  
+  typedef char UDCData_t[LEDKEY8_NR_UDC];
+  
+ /** Constructor for class for driving TM1638 LED controller as used in LEDKEY8
+   *
+   * @brief Supports 8 Digits of 7 Segments + DP + LED Icons. Also supports a scanned keyboard of 8 keys.
+   *  
+   * @param  PinName mosi, miso, sclk, cs SPI bus pins
+   */
+  TM1638_LEDKEY8(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
+     * @param bool clrAll Clear Icons also (default = false)
+     */
+    void cls(bool clrAll = false);
+
+    /** Set Icon
+     *
+     * @param Icon icon Enums Icon has Grid position encoded in 8 MSBs, Icon pattern encoded in 24 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 24 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 databyte to TM1638
+     *  @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){
+      TM1638::writeData(address, data);
+    }        
+
+   /** Write Display datablock to TM1638
+    *  @param  DisplayData_t data Array of TM1638_DISPLAY_MEM (=16) bytes for displaydata (starting at address 0)
+    *  @param  length number bytes to write (valid range 0..(LEDKEY8_NR_GRIDS*2) (=16), starting at address 0)   
+    *  @return none
+    */   
+    void writeData(DisplayData_t data, int length = (LEDKEY8_NR_GRIDS*2)) {
+      TM1638::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_7S; 
+};
+#endif
+
+#endif
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