Diff: Display.cpp

Revision:

0:cfa2cc5fc505

Child:

1:1926cb6ea141

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Display.cpp	Tue Jul 28 08:14:46 2015 +0000
@@ -0,0 +1,98 @@
+#include "Display.h"
+extern int timer; //Stores timer mode
+extern int Time;  //time in 10mS
+
+                  //A    B    C    d    E    F    g    H    I    J    K    L    M    N    O    P    q    r    S    t    U    V    W    X    y    Z
+int ImageTable[26]={0x77,0x1F,0x4E,0x3D,0x4F,0x47,0x7B,0x37,0x30,0x3C,0x37,0x0E,0x00,0x76,0x7E,0x67,0x73,0x46,0x5B,0x0F,0x3E,0x3E,0x00,0x37,0x3B,0x6D};
+
+DigitalOut CS           (D2);
+SPI Display( PTD2,PTD3,PTD1);
+    
+void DisplayInit(void){
+    CS =1;                     //Disable chip select
+    Display.format(16,3);      //16-bit, mode 3
+    Display.frequency(1000000);//1MHz clock speed
+    SendData(0x01, ShutDown ); //Normal Operation
+    SendData(0x0F, Intensity); //Brightness set to full
+    SendData(0x04, ScanLimit); //Scanning digits 1-5
+    DisplayBCD(1);             //BCD decoder active on all digits
+}
+
+void SendData(int data, int address){
+    
+    CS=0;               //Enable input
+    data|=(address<<8); //Data format: XXXXAAAADDDDDDDD, X=dont care. A=address. D=data
+    Display.write(data);//Send SPI data
+    CS=1;               //Disable input
+    
+}
+
+void DisplayClear(void){//Only use when not in BCD mode.
+    
+    SendData(0x00,1);   //Send nothing to all the digits.
+    SendData(0x00,2);
+    SendData(0x00,3);
+    SendData(0x00,4);
+    SendData(0x00,5);
+    
+}
+
+void DisplayBCD(int state){//1 to turn on, 0 to turn off.
+    if(state){
+        SendData(0xFF, BCD_Mode); 
+    }else{
+        SendData(0x00, BCD_Mode); 
+    }
+}
+
+void DisplayUpdate(void){
+
+    if      (timer==Start){ //If timer is in start mode, increment the time
+        Time++;
+    }else if(timer==Reset){ //If timer is on reset mode, time = 0
+        Time=0;
+    }
+    
+    if(timer!=Disable){           //Display the time on the 7-segment display, if enabled.
+        DisplayBCD(1);
+        SendData(DPoint| (Time/6000)      , 5);
+        SendData(       ((Time%6000)/1000), 4);
+        SendData(DPoint|((Time%1000)/100) , 1);
+        SendData(       ((Time%100 )/10)  , 2);
+        SendData(       ((Time%10  )  )   , 3);
+    }
+}
+
+void DisplayScroll(char data[40]){//Lower case only
+    int ScreenText[50]; //Segment data for screen
+    int n,length;
+    
+    for(n=0;n<50;n++){  //clear array
+        ScreenText[n]=0;
+    }
+    
+    n=0;
+    while(n<40 && (data[n]!='\0')){                 //keep looping untill the end of the string, max 20
+        if(data[n]>96 && data[n]<123){              //check for valid characters
+            ScreenText[n+5]=ImageTable[data[n]-97]; //use a look-up table to convert ASCII to segment data
+        }
+        n++;    
+    }
+    
+    timer=Disable;
+    DisplayBCD(0);  //turn off decoders
+    
+    length=n;
+    for(n=0;n<(length+6);n++){  //display data
+        SendData(ScreenText[n  ], 5);
+        SendData(ScreenText[n+1], 4);
+        SendData(ScreenText[n+2], 1);
+        SendData(ScreenText[n+3], 2);
+        SendData(ScreenText[n+4], 3);
+        wait(0.3);
+    }
+    
+    
+    
+    
+}