7 Segment display counter

Dependencies:   SevenSegLed mbed

Files at this revision

API Documentation at this revision

Comitter:
jf1452
Date:
Thu Nov 14 14:21:22 2013 +0000
Commit message:
First code issue

Changed in this revision

SevenSegLed.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.lib Show annotated file Show diff for this revision Revisions of this file
diff -r 000000000000 -r 134a896bf705 SevenSegLed.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SevenSegLed.lib	Thu Nov 14 14:21:22 2013 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/jf1452/code/SevenSegLed/#2f235ad35a6d
diff -r 000000000000 -r 134a896bf705 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Nov 14 14:21:22 2013 +0000
@@ -0,0 +1,58 @@
+#include "mbed.h"           //Include the mbed header file which contains the prototypes of the libraries used here (DigitalOut, Ticker) as well as various syntax definitions.
+#include "SevenSegLed.h"    //Include the SevenSegLed header file which contains the class for the SevenSegLed output library.
+
+// Lets define some "macros" to make the code easier to read
+
+#define mUnits D_7seg[1]     // When the compiler finds "units" it will substiute it for "D_7seg[1]"
+#define mTens  D_7seg[0]     // When the compiler finds "units" it will substiute it for "D_7seg[1]"
+#define mDot   D_dot[1]      // When the compiler finds "units" it will substiute it for "D_7seg[1]"
+
+void attimeout();            //prototype declared above main function to avoid errors.
+
+//Below is the creation of an instance of SevenSegLed called segmentled.
+//It is constructed with the information relating to the pins which are used, the type of display (common anode or cathode) and
+//the type of transition between outputs. Display mode = smooth will fade the new number in while hard will just change it immediately.
+//com1 and com2 are the pins which power each display. As we only use one pin, com1 is filled with any unused pin and com2 is filled with
+//the pin that is used for MUX. As com2 will go low when not in use the other display will be selected and the MUX effect will still work.
+//
+//                     common type (0:anode common 1:cathode common)
+//                     |
+//                     |  display mode (0:smooth 1:hard)
+//                     |  |
+//                     |  |   segA   segB   segC   segD   segE   segF   segG   segP  com1  com2
+//                     |  |    |      |      |      |      |      |      |      |     |     |
+SevenSegLed segmentled(0, 0, P1_23, P1_28, P0_16, P1_31, P1_13, P1_16, P1_19, P0_23, p21, P1_25);
+
+//Define two arrays to house the data to be outputted. D_7seg can contain digits 0-F and D_dot 0-1.
+//
+//                   0  1   //0 = leftmost digit, 1 = rightmost digit
+//                   |  |
+uint8_t D_7seg[2] = {0, 0}; // seven segment digit number    (0x00:"0", 0x01:"1", ... , 0x09:"9", 0x0A:"A", ... , 0x0F:"F", other:" ")
+uint8_t D_dot[2]  = {0, 0}; // seven segment digit dotpoint. (0:off 1:on)
+
+Ticker timeout;             //Create an instance of class Ticker called timeout.
+
+int main()
+{
+
+    timeout.attach_us(&attimeout, 500000);            //Call attach function in timeout instance to call attimeout() every 500,000us (half a second).
+
+    for(;;) {
+        segmentled.SevenSegLed_main(D_7seg, D_dot);   //Repeatedly call the Segment output function to keep the displays multiplexed.
+    }
+}
+
+void attimeout()                //Timer interrupt routine.
+{
+    mDot = 1 - mDot;
+    if (mDot == 1) {
+        mUnits++;               // This means the same as D_7seg[0] = D_7seg[0] + 1; Increment "units" digit
+        if (mUnits > 9) {       // "units" digit should be in the range 0 -> 9
+            mUnits = 0;         // Reset the "units" to 0
+            mTens++;            // Increment "tens" digit
+            if (mTens > 9) {    // "tens" digit should be in the range 0 -> 9
+                mTens = 0;      // Reset the "tens" to 0
+            }
+        }
+    }
+}
diff -r 000000000000 -r 134a896bf705 mbed.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.lib	Thu Nov 14 14:21:22 2013 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/#f37f3b9c9f0b