Revision 0:a1f9bf062855, committed 2020-09-14

Comitter:

f3d

Date:

Mon Sep 14 14:30:15 2020 +0000

Commit message:

Tested with new pattern

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Sep 14 14:30:15 2020 +0000
@@ -0,0 +1,100 @@
+#include "mbed.h"
+/* 
+ * All the LEDs on the micro:bit are part of the LED Matrix,
+ * In order to get simple blinking behaviour, we set column 0
+ * to be permanently at ground. If you want to use the LEDs as
+ * a screen, there is a display driver in the micro:bit 'DAL',
+ */
+// Columns are active low
+// Rows are active high 
+// Initialize all LED matrix connections in an inactive state
+DigitalOut col1(P0_4,1);
+DigitalOut col2(P0_5,1);
+DigitalOut col3(P0_6,1);
+DigitalOut col4(P0_7,1);
+DigitalOut col5(P0_8,1);
+DigitalOut col6(P0_9,1);
+DigitalOut col7(P0_10,1);
+DigitalOut col8(P0_11,1);
+DigitalOut col9(P0_12,1);
+DigitalOut row1(P0_13,0);
+DigitalOut row2(P0_14,0);
+DigitalOut row3(P0_15,0);
+
+
+
+Ticker DisplayThreadObject;
+typedef struct  {
+    DigitalOut & row;
+    DigitalOut & col;
+    int state;  
+} LEDStruct;
+LEDStruct FrameBuffer[5][5] = { {{row1,col1,0}, {row2,col4,0}, {row1,col2,0}, {row2,col5,0}, {row1,col3,0}},
+                                {{row3,col4,0}, {row3,col5,0}, {row3,col6,0}, {row3,col7,0}, {row3,col8,0}}, 
+                                {{row2,col2,0}, {row1,col9,0}, {row2,col3,0}, {row3,col9,0}, {row2,col1,0}}, 
+                                {{row1,col8,0}, {row1,col7,0}, {row1,col6,0}, {row1,col5,0}, {row1,col4,0}}, 
+                                {{row3,col3,0}, {row2,col7,0}, {row3,col1,0}, {row2,col6,0}, {row3,col2,0}} 
+                            };
+
+
+void DisplayThreadTask(void)
+{
+    static int row=0;
+    static int col=0;
+
+    // Turn off all LEDs from previous state
+    for (int row=0;row<5;row++)
+    {
+        for (int col=0;col<5;col++)
+        {
+            FrameBuffer[row][col].row=0;            
+            FrameBuffer[row][col].col=1;
+        }
+    }
+    
+    if (FrameBuffer[row][col].state==1)
+    {
+        // Turn LED on
+        FrameBuffer[row][col].row = 1;
+        FrameBuffer[row][col].col = 0;
+    }
+    else
+    {
+        // Turn LED off
+        FrameBuffer[row][col].row = 0;
+        FrameBuffer[row][col].col = 1;
+    }
+    
+    col++;
+    if (col > 4)
+    {
+        col = 0;
+        row ++ ;
+        if (row > 4)
+            row = 0;
+    }
+    
+}
+int main() {
+    
+    DisplayThreadObject.attach(DisplayThreadTask,0.001); // update the display once LED per millisecond
+
+    FrameBuffer[0][0].state = 1;
+    FrameBuffer[0][1].state = 1;
+    FrameBuffer[0][2].state = 1;
+    FrameBuffer[0][3].state = 1;
+    FrameBuffer[0][4].state = 1;
+    
+    FrameBuffer[2][2].state = 1;
+    
+    FrameBuffer[4][0].state = 1;
+    FrameBuffer[4][1].state = 1;
+    FrameBuffer[4][2].state = 1;
+    FrameBuffer[4][3].state = 1;
+    FrameBuffer[4][4].state = 1;
+    
+
+    while(1) {
+        
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Mon Sep 14 14:30:15 2020 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400
\ No newline at end of file