Diff: LED7segDisplay.cpp

Revision:

25:0161bf1adc81

Child:

26:166dbe6022e8

diff -r db7494389c03 -r 0161bf1adc81 LED7segDisplay.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LED7segDisplay.cpp	Wed Sep 05 10:15:52 2018 -0700
@@ -0,0 +1,148 @@
+/**
+ * @author Charles Young
+ *
+ */
+
+#include "LED7segDisplay.hpp"
+
+LED7segDisplay::LED7segDisplay()
+{
+   Display_init();
+}
+
+//---------------------------------------------------------------------------
+// Initialize the MAX7219
+
+void LED7segDisplay::Display_init(void)
+{
+   uint8_t i;
+   uint16_t data_to_send[6] = {SHUTDOWN, TURN_ON, DEC_MODE, brightness, SCAN_LIM, TEST};
+
+   for(i = 0; i < sizeof(data_to_send)/sizeof(uint16_t); i++)
+   {
+      sendDataToDisplay(data_to_send[i]);
+   }
+    
+   return;
+}
+
+void Display_brightness_up()
+{
+   if (brightness < BRIGHTNESS_MAX)
+   {
+      Display_brightness(++brightness);
+   }
+}
+
+void Display_brightness_down()
+{
+   if (brightness > BRIGHTNESS_MIN)
+   {
+      Display_brightness(--brightness);
+   }
+}
+
+void Display_brightness(uint16_t brightness)
+{
+   sendDataToDisplay(brightness);
+}
+
+//---------------------------------------------------------------------------
+// Refresh the 6 digits of the main display
+
+void LED7segDisplay::Display_6D_write(uint8_t value)
+{
+ 
+   uint8_t digit;
+   uint16_t data_to_send;
+   char TextString[6];
+    
+   // int to string, then string to digits
+    
+   sprintf(TextString, "%6d", value);   // int to string
+    
+   for(uint8_t i=0; i<6; i++)
+   {   
+      if(TextString[i] == ' ')  // blank empty digits
+         Disp_Digit[i] = 0xFF;
+      else
+         Disp_Digit[i] = TextString[i]-'0';      
+   }
+
+   // write to chip
+
+   SCK = 0;
+   wait_us(DT);    
+    
+   for(digit = 1; digit <7; digit++)
+   {
+      // each stream consists of digit address and data to show
+      data_to_send = 7 - digit;
+      data_to_send<<=8;
+      data_to_send = data_to_send | Disp_Digit[digit-1];
+      sendDataToDisplay(data_to_send);
+   }
+    
+   return;
+}
+
+
+//---------------------------------------------------------------------------
+// Refresh the 2 digits of the gate display
+
+void LED7segDisplay::Display_2D_write(unsigned short value)
+{
+ 
+   uint8_t digit;
+   uint16_t data_to_send;
+   char TextString[2];
+
+   // int to string, then string to digits
+    
+   sprintf(TextString, "%2d", value);   // int to string
+
+   if(TextString[0] == ' ')  // blank empty digits
+      Disp_Digit[7] = 0xFF;    
+   else
+      Disp_Digit[7] = TextString[0] - '0';
+    
+   Disp_Digit[6] = TextString[1] - '0';
+
+   // write to chip
+    
+   SCK = 0;
+   wait_us(DT);    
+    
+   for(digit = 7; digit <9; digit++)
+   {
+      // each stream consists of digit address and data to show
+      data_to_send = digit;
+      data_to_send<<=8;
+      data_to_send = data_to_send | Disp_Digit[digit-1];
+      sendDataToDisplay(data_to_send);
+   }
+    
+   return;
+}
+
+void LED7segDisplay::sendDataToDisplay(uint16_t data_to_send)
+{
+   CS1 = 0;
+   for(uint16_t mask = 0x8000; mask!= 0; mask>>= 1)
+   {
+      wait_us(DT);
+      SCK = 0;
+      if(mask & data_to_send)
+         MOSI = 1;
+      else
+         MOSI = 0;
+                
+      wait_us(DT);
+      SCK = 1;
+   }
+        
+   wait_us(DT);    
+   SCK = 0;
+   wait_us(DT);
+   CS1 = 1;
+}