Diff: lab6b.cpp

Revision:

0:cb2826e4b518

Child:

1:734e32694486

diff -r 000000000000 -r cb2826e4b518 lab6b.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lab6b.cpp	Thu Aug 27 17:22:29 2020 +0000
@@ -0,0 +1,44 @@
+/*
+    Title:  Program to position text on different coloured backgrounds.
+    Author: Dave Ross
+    Date:   Mar 21st, 2019
+    Description:    This program will take keyboard input to position
+                    fixed text and to change the colour of screen the
+                    text is displayed on.
+*/
+    
+// Include Section
+#include "Grove_LCD_RGB_Backlight.h"        // Grove LCD header file
+#include "mbed.h"                           // mbed header file
+    
+// Function Prototype Section
+void clear(void);                           // clears the PC screen
+void position(int x, int y);                // positions screen cursor at (x,y)
+
+// Hardware definition Section
+Grove_LCD_RGB_Backlight lcd(D14,D15);       // lcd is associated with (D14,D15)
+AnalogIn pot(A1);                           // pot is associated with A1
+const int MAX=10;                           // MAX is dimension of Buffer Array
+int main(void) 
+{
+   char buffer[MAX];                        // buffer has MAX elements
+   double voltage;                          // variable for storing voltage
+   int i;                                   // variable used to null array
+   for(i=0;i<=MAX-1;++i)                    // NULL all elements 0 to MAX-1
+   {
+     buffer[i]=0;                           // set element to NULL character
+   }
+   lcd.clear();                             // clear lcd screen
+   lcd.locate(0,0);                         // 1st column 1st row
+   lcd.print("0123456789012345");           // print grid 0-15
+   lcd.setRGB(0x00,0x00,0xff);              // set background to blue
+   for(;;)                                  // infinite loop
+   {
+      voltage=pot.read();                   // voltage reading (0-1) from pot
+      voltage=3.33*voltage;                 // scale to 3.33 volts
+      lcd.locate(3,1);                      // 4th column 2nd row
+      sprintf(buffer,"%5.3f",voltage);      // voltage to string in buffer
+      lcd.print(buffer);                    // print buffer on lcd
+      wait(0.05);
+   }
+}
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