Diff: main.cpp

Revision:

3:e7802960032b

Parent:

2:ad0b044d0a10

--- a/main.cpp	Sat Dec 04 11:31:07 2010 +0000
+++ b/main.cpp	Thu Mar 07 17:55:29 2013 +0000
@@ -1,10 +1,145 @@
-// Hello World! for the TextLCD
+/* Lcd_Custom_Char
+
+Up to 8 characters can be programmed in CGRAM, but because CGRAM is a RAM, characters are lost
+on power off and must be reloaded on power on.
+Assuming 2x16 LCD with HD44780 Hitachi controller compatible.
+
+*/
 
 #include "mbed.h"
 #include "TextLCD.h"
 
-TextLCD lcd(p15, p16, p17, p18, p19, p20); // rs, e, d4-d7
+TextLCD lcd(p13, p14, p17, p18, p19, p20); // rs, e, d4, d5, d6, d7
+AnalogIn ain(p15);
+DigitalOut led1(LED1);
+DigitalOut led2(LED2);
+DigitalOut led3(LED3);
+DigitalOut led4(LED4);
+
+// Defines 8 bar heights
+char custom_char[8][8] = {
+    {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}, // 0
+    {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x1f}, // 1
+    {0x00,0x00,0x00,0x00,0x00,0x00,0x1f,0x1f}, // 2
+    {0x00,0x00,0x00,0x00,0x00,0x1f,0x1f,0x1f}, // 3
+    {0x00,0x00,0x00,0x00,0x1f,0x1f,0x1f,0x1f}, // 4
+    {0x00,0x00,0x00,0x1f,0x1f,0x1f,0x1f,0x1f}, // 5
+    {0x00,0x00,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f}, // 6
+    {0x00,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f}  // 7
+};
+
+BusOut Lcd_pins(p17, p18, p19, p20); // d4, d5, d6, d7
+
+DigitalOut rs_pin(p13); // rs
+DigitalOut e_pin(p14);  // e 
+
+// Prepare write port
+void writePort(int value) {
+
+    Lcd_pins = value >> 4;  // Shifts 4 bit right.
+    wait(0.000040f); // Delay
+    e_pin = 0;
+    wait(0.000040f);
+    e_pin = 1;
+    Lcd_pins = value;
+    wait(0.000040f);
+    e_pin = 0;
+    wait(0.000040f);
+    e_pin = 1;
+}
 
 int main() {
-    lcd.printf("Hello World!\n");
-}
+    float temp = ain;
+    lcd.cls();
+    //lcd.printf("Writing Characters...");
+    wait(0.5);
+    for (int j=0; j<8; j++) {
+
+        rs_pin = 0; // Send command
+
+        /* 0X40 is the initial CGRAM address. Because each character needs a total amount of 8 memory 
+        locations, we increment addres in 8 units after each character.
+        */
+        writePort(0x40+8*j);
+// Writes custom characters to the text LCD.
+        rs_pin = 1; // Send the data here
+        for (int i=0; i<8; i++) {
+            writePort(custom_char[j][i]);
+        }
+    }
+    lcd.cls();
+    wait(0.010);
+    lcd.locate(0,0);
+
+// Prints loaded custom characters. ASCII codes 0 to 7.
+
+    while(1){
+        wait(0.2);
+        temp = ain;
+        if(temp>=0&&temp<=0.142){
+        lcd.cls();
+        lcd.putc(0);
+        led1=0;
+        led2=0;
+        led3=0;
+        led4=0;
+        }
+       if(temp>0.142&&temp<=0.284){
+        lcd.cls();
+        lcd.putc(1);
+        led1=1;
+        led2=0;
+        led3=0;
+        led4=0;
+        }
+       if(temp>0.284&&temp<=0.426){
+        lcd.cls();
+        lcd.putc(2);
+        led1=1;
+        led2=1;
+        led3=0;
+        led4=0;
+        }
+       if(temp>0.426&&temp<=0.568){ 
+        lcd.cls();
+        lcd.putc(3);
+        led1=1;
+        led2=1;
+        led3=0;
+        led4=0;
+        }
+       else if(temp>0.568&&temp<=0.710){   
+        lcd.cls();
+        lcd.putc(4);
+        led1=1;
+        led2=1;
+        led3=1;
+        led4=0;
+        }
+       else if(temp>0.710&&temp<=0.852){
+        lcd.cls();
+        lcd.putc(5);
+        led1=1;
+        led2=1;
+        led3=1;
+        led4=0;
+        }
+       else if(temp>0.852&&temp<=0.92){
+        lcd.cls();
+        lcd.putc(6);
+        led1=1;
+        led2=1;
+        led3=1;
+        led4=1;}
+        
+       else if(temp>0.92&&temp<=1.0){
+        lcd.cls();
+        lcd.putc(7);
+        led1=1;
+        led2=1;
+        led3=1;
+        led4=1;}
+            
+
+    }
+ }