Diff: TM1640.cpp

Revision:

0:7e120ffa56d3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TM1640.cpp	Thu Jan 28 19:25:49 2016 +0000
@@ -0,0 +1,436 @@
+/* mbed TM1640 Library, for TM1640 LED controller
+ * Copyright (c) 2016, 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 "TM1640.h"
+
+/** Constructor for class for driving TM1640 LED controller with Serial bus interface device. 
+ *  @brief Supports 16 digits @ 8 segments. 
+ *   
+ *  @param  PinName mosi Serial bus MOSI pin
+ *  @param  PinName sclk Serial bus SCLK pin
+*/
+TM1640::TM1640(PinName mosi, PinName sclk) : _mosi(mosi), _sclk(sclk) {
+
+  _init();
+}
+
+/** Init the SPI interface and the controller
+  * @param  none
+  * @return none
+  */ 
+void TM1640::_init(){
+  
+//TM1640 uses Serial bus that looks like SPI, but uses Start and Stop conditions like I2C instead of CS
+//init Serial bus
+  _mosi=1;
+  _sclk=1;  
+
+//init controller  
+  _display = TM1640_DSP_ON;
+  _bright  = TM1640_BRT_DEF; 
+  _writeCmd(TM1640_DSP_CTRL_CMD, _display | _bright );                                 // Display control cmd, display on/off, brightness   
+  
+  _writeCmd(TM1640_DATA_SET_CMD, TM1640_DATA_WR | TM1640_ADDR_INC | TM1640_MODE_NORM); // Data set cmd, normal mode, auto incr, write data  
+}   
+
+
+/** Clear the screen and locate to 0
+ */  
+void TM1640::cls() {
+
+  _start();  
+
+  _write(TM1640_ADDR_SET_CMD | 0x00); // Address set cmd, 0      
+  for (int cnt=0; cnt<TM1640_DISPLAY_MEM; cnt++) {
+    _write(0x00); // data 
+  }
+
+  _stop();  
+}  
+
+/** Set Brightness
+  *
+  * @param  char brightness (3 significant bits, valid range 0..7 (1/16 .. 14/14 dutycycle)  
+  * @return none
+  */
+void TM1640::setBrightness(char brightness){
+
+  _bright = brightness & TM1640_BRT_MSK; // mask invalid bits
+  
+  _writeCmd(TM1640_DSP_CTRL_CMD, _display | _bright );  // Display control cmd, display on/off, brightness  
+}
+
+/** Set the Display mode On/off
+  *
+  * @param bool display mode
+  */
+void TM1640::setDisplay(bool on) {
+  
+  if (on) {
+    _display = TM1640_DSP_ON;
+  }
+  else {
+    _display = TM1640_DSP_OFF;
+  }
+  
+  _writeCmd(TM1640_DSP_CTRL_CMD, _display | _bright );  // Display control cmd, display on/off, brightness   
+}
+
+/** Write databyte to TM1640
+  *  @param  int address display memory location to write byte
+  *  @param  char data byte written at given address
+  *  @return none
+  */ 
+void TM1640::writeData(char data, int address) {
+  
+  _start();
+
+  _write(TM1640_ADDR_SET_CMD | (address & TM1640_ADDR_MSK)); // Set Address cmd     
+  _write(data); // data 
+
+  _stop();  
+}
+
+/** Write Display datablock to TM1640
+  *  @param  DisplayData_t data Array of TM1640_DISPLAY_MEM (=16) bytes for displaydata
+  *  @param  length number bytes to write (valid range 0..(TM1640_MAX_NR_GRIDS * TM1640_BYTES_PER_GRID) (=16), when starting at address 0)  
+  *  @param  int address display memory location to write bytes (default = 0) 
+  *  @return none
+  */  
+void TM1640::writeData(DisplayData_t data, int length, int address) {
+
+  _start();
+
+// sanity check
+  address &= TM1640_ADDR_MSK;
+  if (length < 0) {length = 0;}
+  if ((length + address) > TM1640_DISPLAY_MEM) {length = (TM1640_DISPLAY_MEM - address);}
+    
+//  _write(TM1640_ADDR_SET_CMD | 0x00); // Set Address at 0
+  _write(TM1640_ADDR_SET_CMD | address); // Set Address
+  
+  for (int idx=0; idx<length; idx++) {    
+//    _write(data[idx]); // data 
+    _write(data[address + idx]); // data 
+  }
+  
+  _stop();  
+}
+
+
+/** Generate Start condition for TM1640
+  *  @param  none
+  *  @return none
+  */ 
+void TM1640::_start() {
+
+  _mosi=0;
+  wait_us(1);
+  _sclk=0;
+  wait_us(1);
+}
+  
+/** Generate Stop condition for TM1640
+  *  @param  none
+  *  @return none
+  */ 
+void TM1640::_stop() {
+
+  _mosi=0;
+  wait_us(1);  
+  _sclk=1;
+  wait_us(1);
+  _mosi=1;
+  wait_us(1);
+}
+
+/** Send byte to TM1640
+  *  @param  int data
+  *  @return none
+  */ 
+void TM1640::_write(int data) {
+ 
+  for (int bit=0; bit<8; bit++) {    
+    //The TM1640 expects LSB first, whereas SPI is MSB first      
+    if (((data >> bit) & 0x01) == 0x01) {
+      _mosi=1;      
+    }
+    else {    
+      _mosi=0;      
+    }  
+    wait_us(1);
+    _sclk=1;
+    wait_us(1);
+    _sclk=0;  
+    wait_us(1);
+  }  
+}
+
+
+/** Write command and parameter to TM1640
+  *  @param  int cmd Command byte
+  *  &Param  int data Parameters for command
+  *  @return none
+  */  
+void TM1640::_writeCmd(int cmd, int data){
+    
+  _start();
+
+  _write((cmd & TM1640_CMD_MSK) | (data & ~TM1640_CMD_MSK));   
+ 
+  _stop();          
+}  
+
+
+#if (LM1640_TEST == 1) 
+// Derived class for TM1640 used in LED&KEY display unit
+//
+
+/** Constructor for class for driving TM1640 LED controller as used in LM1640
+  *
+  *  @brief Supports 8 Digits of 7 Segments + DP.
+  *   
+  *  @param  PinName mosi Serial bus MOSI pin
+  *  @param  PinName sclk Serial bus SCLK pin
+  */
+TM1640_LM1640::TM1640_LM1640(PinName mosi, PinName sclk) : TM1640(mosi, sclk) {
+  _column  = 0;
+  _columns = LM1640_NR_DIGITS;    
+}  
+
+#if(0)
+#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
+#endif
+
+/** Locate cursor to a screen column
+  *
+  * @param column  The horizontal position from the left, indexed from 0
+  */
+void TM1640_LM1640::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 TM1640_LM1640::columns() {
+    return _columns;
+}
+
+    
+/** Clear the screen and locate to 0
+  * @param bool clrAll Clear Icons also (default = false)
+  */ 
+void TM1640_LM1640::cls(bool clrAll) {  
+
+  if (clrAll) {
+    //clear local buffer (inclumosig Icons)
+    for (int idx=0; idx < LM1640_NR_GRIDS; idx++) {
+      _displaybuffer[idx] = 0x00;  
+    }
+  }  
+  else {
+    //clear local buffer (preserving Icons)
+    for (int idx=0; idx < LM1640_NR_GRIDS; idx++) {
+      _displaybuffer[idx] = _displaybuffer[idx] & MASK_ICON_GRID[idx];  
+    }  
+  }
+
+  writeData(_displaybuffer, (LM1640_NR_GRIDS * TM1640_BYTES_PER_GRID));
+
+  _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 TM1640_LM1640::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, (LM1640_NR_GRIDS * TM1640_BYTES_PER_GRID));
+  writeData(_displaybuffer, TM1640_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 TM1640_LM1640::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, (LM1640_NR_GRIDS * TM1640_BYTES_PER_GRID));
+  writeData(_displaybuffer, TM1640_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)       
+  */
+void TM1640_LM1640::setUDC(unsigned char udc_idx, int udc_data) {
+
+  //Sanity check
+  if (udc_idx > (LM1640_NR_UDC-1)) {
+    return;
+  }
+  // Mask out Icon bits?
+
+  _UDC_7S[udc_idx] = LO(udc_data);
+}
+
+
+/** Write a single character (Stream implementation)
+  */
+int TM1640_LM1640::_putc(int value) {
+    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, (LM1640_NR_GRIDS * TM1640_BYTES_PER_GRID));
+        writeData(_displaybuffer, TM1640_BYTES_PER_GRID, addr); 
+        
+        //No Cursor Update
+      }
+    }
+    else if ((value >= 0) && (value < LM1640_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, (LM1640_NR_GRIDS * TM1640_BYTES_PER_GRID));
+      writeData(_displaybuffer, TM1640_BYTES_PER_GRID, addr);        
+                                
+      //Update Cursor
+      _column++;
+      if (_column > (LM1640_NR_DIGITS - 1)) {
+        _column = 0;
+      }
+
+    } // if validChar           
+
+    return value;
+}
+
+
+// get a single character (Stream implementation)
+int TM1640_LM1640::_getc() {
+    return -1;
+}
+
+#endif