Revision 24:fb3399713710, committed 2014-05-10

Comitter:

Sissors

Date:

Sat May 10 13:50:25 2014 +0000

Parent:

23:d47f226efb24

Child:

25:6162b31128c9

Commit message:

Added ST7032 support + SPI mode

Changed in this revision

--- a/TextLCD.cpp	Wed Apr 02 18:16:37 2014 +0000
+++ b/TextLCD.cpp	Sat May 10 13:50:25 2014 +0000
@@ -111,7 +111,18 @@
           wait_ms(50);
         
           break;
-
+      case ST7032:
+          _writeByte( 0x1c );   //Internal OSC frequency adjustment 183HZ    bias will be 1/4 
+          wait_us(30);
+          _writeByte( 0x73 );    //Contrast control  low byte
+          wait_us(30);  
+          _writeByte( 0x57 );    //booster circuit is turn on.    /ICON display off. /Contrast control   high byte
+          wait_us(30);
+          _writeByte( 0x6c );  //Follower control
+          wait_us(50);   
+          _writeByte( 0x0c );    //DISPLAY ON
+          wait_us(30);
+          break;
       case WS0010:         
           // WS0010 OLED controller: Initialise DC/DC Voltage converter for LEDs
           // Note: supports 1 or 2 lines (and 16x100 graphics)
@@ -1107,6 +1118,77 @@
 //---------- End TextLCD_SPI ------------
 
 
+//--------- Start TextLCD_NativeSPI -----------
+
+ /** Create a TextLCD interface using an SPI 74595 portexpander
+   *
+   * @param spi             SPI Bus
+   * @param cs              chip select pin (active low)
+   * @param type            Sets the panel size/addressing mode (default = LCD16x2)
+   * @param ctrl            LCD controller (default = HD44780)      
+   */
+TextLCD_NativeSPI::TextLCD_NativeSPI(SPI *spi, PinName cs, PinName rs, LCDType type, PinName bl, LCDCtrl ctrl) :
+                         TextLCD_Base(type, ctrl), 
+                         _spi(spi),        
+                         _cs(cs),
+                         _rs(rs) {      
+        
+  // Setup the spi for 8 bit data, low steady state clock,
+  // rising edge capture, with a 500KHz or 1MHz clock rate  
+  _spi->format(8,0);
+  _spi->frequency(1000000);    
+  
+  // The hardware Backlight pin is optional. Test and make sure whether it exists or not to prevent illegal access.
+  if (bl != NC) {
+    _bl = new DigitalOut(bl);   //Construct new pin 
+    _bl->write(0);              //Deactivate    
+  }
+  else {
+    // No Hardware Backlight pin       
+    _bl = NULL;                 //Construct dummy pin     
+  }  
+  
+  _writeByte( 0x39 );  //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot IS=1
+  wait_us(30);
+  _init();
+}
+
+TextLCD_NativeSPI::~TextLCD_NativeSPI() {
+   if (_bl != NULL) {delete _bl;}  // BL pin
+}
+
+// Not used in this mode
+void TextLCD_NativeSPI::_setEnable(bool value) {
+}    
+
+// Set RS pin
+// Used for mbed pins, I2C bus expander or SPI shiftregister
+void TextLCD_NativeSPI::_setRS(bool value) {
+    _rs = value;
+}    
+
+// Set BL pin
+void TextLCD_NativeSPI::_setBL(bool value) {
+    if (_bl)
+        _bl->write(value);   
+}    
+
+// Write a byte using SPI
+void TextLCD_NativeSPI::_writeByte(int value) {
+    _cs = 0;
+    wait_us(1);
+    _spi->write(value);
+    wait_us(1);
+    _cs = 1;
+}
+    
+
+// Not used in this mode
+void TextLCD_NativeSPI::_setData(int value) {
+}    
+
+
+//---------- End TextLCD_NativeSPI ------------
 
 
 

--- a/TextLCD.h	Wed Apr 02 18:16:37 2014 +0000
+++ b/TextLCD.h	Sat May 10 13:50:25 2014 +0000
@@ -191,7 +191,8 @@
     enum LCDCtrl {
         HD44780,    /**<  HD44780 (default)      */    
         WS0010,     /**<  WS0010 OLED Controller */    
-        ST7036      /**<  ST7036                 */    
+        ST7036,      /**<  ST7036                 */   
+        ST7032      /**<  ST7032                 */   
     };
 
 
@@ -335,7 +336,7 @@
 /** Low level write operations to LCD controller
   */
     void _writeNibble(int value);
-    void _writeByte(int value);
+    virtual void _writeByte(int value);
     void _writeCommand(int command);
     void _writeData(int data);
 
@@ -496,4 +497,42 @@
 
 //---------- End TextLCD_SPI ------------
 
+
+//--------- Start TextLCD_NativeSPI -----------
+
+
+/** Create a TextLCD interface with direct SPI access to the controller
+  *
+  */
+class TextLCD_NativeSPI : public TextLCD_Base {    
+public:
+    /** Create a TextLCD interface using an SPI 74595 portexpander
+     *
+     * @param spi             SPI Bus
+     * @param cs              chip select pin (active low)
+     * @param rs              Instruction/data control line
+     * @param type            Sets the panel size/addressing mode (default = LCD16x2)
+     * @param bl              Backlight control line (optional, default = NC)  
+     * @param ctrl            LCD controller (default = ST7032)                     
+     */
+    TextLCD_NativeSPI(SPI *spi, PinName cs, PinName rs, LCDType type = LCD16x2, PinName bl = NC, LCDCtrl ctrl = ST7032);
+    virtual ~TextLCD_NativeSPI(void);
+
+private:
+    virtual void _setEnable(bool value);
+    virtual void _setRS(bool value);  
+    virtual void _setBL(bool value);
+    virtual void _setData(int value);
+    virtual void _writeByte(int value);
+   
+// SPI bus        
+    SPI *_spi;
+    DigitalOut _cs;    
+    DigitalOut _rs;
+    DigitalOut *_bl;
+
+};
+
+//---------- End TextLCD_NativeSPI ------------
+
 #endif