Diff: LCD_I2C.cpp

Revision:

2:f6d058931b17

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD_I2C.cpp	Tue Aug 11 08:38:55 2015 +0000
@@ -0,0 +1,258 @@
+//////////////////////////////////////////////////////////////////////////////////////
+//                                                                                  //
+//      File        : LCD_I2C.cpp                                                   //
+//      Version     : 1.0                                                           //
+//      Date        : 26 june 2015                                                  //
+//      Author      : Dany Brugman                                                  //
+//      Comment     : Class to write data to a 2x16 LCD by I2C                      //
+//                    using a MCP23017 port expander.                               //
+//                                                                                  //
+//      Changelog   :                                                               //
+//      Date:           Name:       Comment:                                        //
+//      25/03/2015      DNB         First version                                   //
+//      26/06/2015      DNB         Rebuild to class LCD_I2C                        //
+//                                                                                  //
+//////////////////////////////////////////////////////////////////////////////////////
+#include "menu.h"
+#include "LCD_I2C.h"
+
+//////////////////////////////////////////////////////////////////////////////////////
+// constructor                                                                      //
+//////////////////////////////////////////////////////////////////////////////////////
+LCD_I2C::LCD_I2C(PinName data, PinName clk, char deviceID) : 
+         i2c(data, clk), 
+         deviceAdress(deviceID),
+         mcp23017(i2c, 0x40)
+{
+    vLCD_init_I2C();
+};
+
+LCD_I2C::~LCD_I2C()
+{
+};
+
+
+extern Menu mLCDMenu;
+//////////////////////////////////////////////////////////////////////////////////////
+// delay function for LCD                                                           //
+//////////////////////////////////////////////////////////////////////////////////////
+void LCD_I2C::vLCD_delay_I2C (unsigned int t_delay)
+{
+    unsigned int i;
+    
+    for (i=0; i < t_delay; i++);
+}
+
+//////////////////////////////////////////////////////////////////////////////////////
+// write commando to LCD                                                            //
+//////////////////////////////////////////////////////////////////////////////////////
+void LCD_I2C::vLCD_cmd_I2C   (unsigned char commando)
+{
+__disable_irq();    // Disable Interrupts
+
+    // write commando to LCD
+    mcp23017.write(PORT_A, commando);
+    
+    // LCD_RS = 0
+    buffer_GPIOB = buffer_GPIOB & 0xFD;   // RS = 0
+    // write to LCD
+    mcp23017.write(PORT_B, buffer_GPIOB);
+    
+    // LCD_EN = 1
+    buffer_GPIOB = buffer_GPIOB | 0x01;   // EN = 1
+    // write to LCD
+    mcp23017.write(PORT_B, buffer_GPIOB);
+    
+    // LCD_EN = 0
+    buffer_GPIOB = buffer_GPIOB & 0xFE;   // EN = 0
+    // write to LCD
+    mcp23017.write(PORT_B, buffer_GPIOB);
+    
+__enable_irq();     // Enable Interrupts
+}
+
+//////////////////////////////////////////////////////////////////////////////////////
+// write single char to LCD                                                         //
+//////////////////////////////////////////////////////////////////////////////////////
+void LCD_I2C::vLCD_data_I2C  (unsigned char data)
+{
+__disable_irq();    // Disable Interrupts
+ 
+    // write data to LCD
+    mcp23017.write(PORT_A, data);
+    
+    // LCD_RS = 1
+    buffer_GPIOB = buffer_GPIOB | 0x02;   // RS = 1
+    // write to LCD
+    mcp23017.write(PORT_B, buffer_GPIOB);
+    
+    // LCD_EN = 1
+    buffer_GPIOB = buffer_GPIOB | 0x01;   // EN = 1
+    // write to LCD
+    mcp23017.write(PORT_B, buffer_GPIOB);
+    
+    // LCD_EN = 0
+    buffer_GPIOB = buffer_GPIOB & 0xFE;   // EN = 0
+    // write to LCD
+    mcp23017.write(PORT_B, buffer_GPIOB);
+    
+__enable_irq();     // Enable Interrupts
+}
+
+//////////////////////////////////////////////////////////////////////////////////////
+// Initialize LCD                                                                   //
+//////////////////////////////////////////////////////////////////////////////////////
+void LCD_I2C::vLCD_init_I2C  (void)
+{
+    // init port expander
+    //Port A is databus - Output
+    mcp23017.direction(PORT_A, PORT_DIR_OUT);
+    //Port B is controlbus - Output
+    mcp23017.direction(PORT_B, PORT_DIR_OUT);
+    
+    vLCD_cmd_I2C (0x00);
+    // vLCD_delay_I2C (65535)
+    vLCD_delay_I2C (100);
+    
+    vLCD_cmd_I2C (0x38);
+    // vLCD_delay_I2C (65535)
+    vLCD_delay_I2C (100);
+    
+    vLCD_cmd_I2C (0x38);
+    //vLCD_delay_I2C (65535)
+    vLCD_delay_I2C (100);
+    
+    vLCD_cmd_I2C (0x38);
+    //vLCD_delay_I2C (65535)
+    vLCD_delay_I2C (100);
+    
+    // Display ON / OFF
+    vLCD_cmd_I2C (0x08);
+    
+    //vLCD_delay_I2C (65535)
+    vLCD_delay_I2C (100);
+    
+    // Clear Display
+    vLCD_cmd_I2C (0x01);
+    
+    //vLCD_delay_I2C (65535)
+    vLCD_delay_I2C (100);
+    
+    // Entry Mode Set
+    vLCD_cmd_I2C (0x06);
+    
+    //vLCD_delay_I2C (65535)
+    vLCD_delay_I2C (100);
+    
+    // Display ON / OFF
+    vLCD_cmd_I2C (0x0C);
+    
+    //vLCD_delay_I2C (65535)
+    vLCD_delay_I2C (100);
+}
+
+//////////////////////////////////////////////////////////////////////////////////////
+// Write string to LCD                                                              //
+//////////////////////////////////////////////////////////////////////////////////////
+void LCD_I2C::vLCD_print_I2C (unsigned char *string, unsigned char line)
+{
+    unsigned int i;
+    
+    // select target line to write to
+    if (line == 1)
+    {
+        vLCD_cmd_I2C (0x80);
+    }
+    else if (line == 2)
+    {
+        vLCD_cmd_I2C (0xC0);
+    }
+    else
+    {
+        return;    // End of function: Error in the past value of line
+    }
+    
+    // write data to selected line
+    for (i=0; i<16; i++)
+    {
+        if (string [i] != 0x00) 
+        {
+            vLCD_data_I2C (string [i]);
+        }
+        else
+            vLCD_data_I2C (' ');
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////////////////
+// Write string to LCD                                                              //
+//////////////////////////////////////////////////////////////////////////////////////
+void LCD_I2C::vLCD_printPos_I2C (unsigned char *string, unsigned char line, unsigned char character)
+{
+    unsigned int i;
+    
+    // select target line and position to write to
+    if (line == 1)
+    {
+        vLCD_cmd_I2C (0x80+(character-1));
+    }
+    
+    else if (line == 2)
+    {
+        vLCD_cmd_I2C (0xC0+(character-1));
+    }
+    
+    else
+    {
+        return;    // End of function: Error in the past value of line
+    }
+    
+    // write data to selected line and position
+    for (i=0; i<16; i++)
+    {
+        if (string [i] != 0x00)
+        {
+            vLCD_data_I2C (string [i]);
+        }
+        else
+            vLCD_data_I2C (' ');
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////////////////
+// Writing integer to LCD                                                           //
+//////////////////////////////////////////////////////////////////////////////////////
+void LCD_I2C::vLCD_printInt_I2C (int value, unsigned char line, unsigned char character)
+{
+        static char buffer[32];
+        // convert int to char
+        sprintf(buffer, "%.2d", value);
+        // write converted int to LCD
+    vLCD_printPos_I2C((unsigned char*)buffer, line, character);
+}
+
+//////////////////////////////////////////////////////////////////////////////////////
+// clear LCD [unsed]                                                                //
+//////////////////////////////////////////////////////////////////////////////////////
+void LCD_I2C::vLCD_clear_I2C (void)
+{
+    // Clear Display
+    vLCD_cmd_I2C (0x01);
+    //vLCD_delay_I2C (65535)
+    vLCD_delay_I2C (100);
+    // Display ON / OFF
+    vLCD_cmd_I2C (0x0C);
+    //vLCD_delay_I2C (65535)
+    vLCD_delay_I2C (100);
+}
+
+//////////////////////////////////////////////////////////////////////////////////////
+// update LCD                                                                       //
+//////////////////////////////////////////////////////////////////////////////////////
+void LCD_I2C::vLCD_update (void)
+{
+   vLCD_print_I2C((unsigned char*)mLCDMenu.getLine1(), 1);
+   vLCD_print_I2C((unsigned char*)mLCDMenu.getLine2(), 2);
+   //vLCD_printPos_I2C((unsigned char*)mLCDMenu.getLine1(), 1, 1);
+   //vLCD_printPos_I2C((unsigned char*)mLCDMenu.getLine2(), 2, 1);
+}
\ No newline at end of file