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--- arduino:displays_for_classic_arduinos:display_nokia_5110_u8g2_counter.ino [2018/01/28 04:36] – created mithat
+++ arduino:displays_for_classic_arduinos:display_nokia_5110_u8g2_counter.ino [2018/04/23 16:16] (current) – mithat
@@ Line 1: / Line 1: @@
 <file c++ display_nokia_5110_u8g2_counter.ino>
-#include <U8g2lib.h>
 /*
- *  display_nokia_5110_u8g2_counter.ino
+   display_nokia_5110_u8g2_counter.ino
- *
+   Mithat Konar
- * Test screen update speed with large solid fonts on
- * a Nokia 5110 screen that uses the PCD8544 controller.
+   Test screen update speed with large solid fonts on
- *
+   a Nokia 5110 screen that uses the PCD8544 controller.
- * Notes:
- * Consumes 42% of program storage space and
+   Notes:
- * 24% of dynamic memory on a Pro Mini.
+   Consumes 42% of program storage space and
+% of dynamic memory on a Pro Mini.
+   String storage may not be not optimized.
+   Frame rate without additional LOOP_DELAY is about
+fps with 8MHz processor.
  */
@@ Line 24: / Line 28: @@
  * GND: ground
  */
+#include <U8g2lib.h>
 const unsigned int CLOCK_PIN = 13,
@@ Line 31: / Line 37: @@
                    RESET_PIN = 8;
-//U8G2_PCD8544_84X48_1_4W_SW_SPI u8g2 = U8G2_PCD8544_84X48_1_4W_SW_SPI(U8G2_R0, CLOCK_PIN, DATA_PIN, CS_PIN, DC_PIN, RESET_PIN);  // SW SPI
+U8G2_PCD8544_84X48_1_4W_HW_SPI disp(U8G2_R0, CS_PIN, DC_PIN, RESET_PIN);  // HW SPI
-U8G2_PCD8544_84X48_1_4W_HW_SPI disp = U8G2_PCD8544_84X48_1_4W_HW_SPI(U8G2_R0, CS_PIN, DC_PIN, RESET_PIN);                       // HW SPI
 unsigned int counter = 80;
 char dispStr[4];    // null terminated char array used to pass to renderer.
+const unsigned int LOOP_DELAY = 500; // msec of additional loop delay
 void setup(void) {
@@ Line 55: / Line 61: @@
     String(counter).toCharArray(dispStr, 4);
     disp.drawStr( 0, 47, dispStr);
-  } while ( disp.nextPage() );
+  } while (disp.nextPage());
-  /* inherent frame rate is about 10 fps with 8MHz processor
+//  delay(LOOP_DELAY);
-     (without additional delay). */
-  delay(500);
 }
 </file>