Diff: TM1650.cpp

Revision:

0:4430a1559b4f

--- /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