ArmfulKST / Mbed 2 deprecated LEDTester2020

Test program for the microbit LED matrix

Dependencies:   mbed

main.cpp@0:a1f9bf062855, 2020-09-14 (annotated)

Committer:
f3d
Date:
Mon Sep 14 14:30:15 2020 +0000
Revision:
0:a1f9bf062855
Tested with new pattern

Who changed what in which revision?

UserRevisionLine numberNew contents of line
f3d 0:a1f9bf062855 1 #include "mbed.h"
f3d 0:a1f9bf062855 2 /*
f3d 0:a1f9bf062855 3 * All the LEDs on the micro:bit are part of the LED Matrix,
f3d 0:a1f9bf062855 4 * In order to get simple blinking behaviour, we set column 0
f3d 0:a1f9bf062855 5 * to be permanently at ground. If you want to use the LEDs as
f3d 0:a1f9bf062855 6 * a screen, there is a display driver in the micro:bit 'DAL',
f3d 0:a1f9bf062855 7 */
f3d 0:a1f9bf062855 8 // Columns are active low
f3d 0:a1f9bf062855 9 // Rows are active high
f3d 0:a1f9bf062855 10 // Initialize all LED matrix connections in an inactive state
f3d 0:a1f9bf062855 11 DigitalOut col1(P0_4,1);
f3d 0:a1f9bf062855 12 DigitalOut col2(P0_5,1);
f3d 0:a1f9bf062855 13 DigitalOut col3(P0_6,1);
f3d 0:a1f9bf062855 14 DigitalOut col4(P0_7,1);
f3d 0:a1f9bf062855 15 DigitalOut col5(P0_8,1);
f3d 0:a1f9bf062855 16 DigitalOut col6(P0_9,1);
f3d 0:a1f9bf062855 17 DigitalOut col7(P0_10,1);
f3d 0:a1f9bf062855 18 DigitalOut col8(P0_11,1);
f3d 0:a1f9bf062855 19 DigitalOut col9(P0_12,1);
f3d 0:a1f9bf062855 20 DigitalOut row1(P0_13,0);
f3d 0:a1f9bf062855 21 DigitalOut row2(P0_14,0);
f3d 0:a1f9bf062855 22 DigitalOut row3(P0_15,0);
f3d 0:a1f9bf062855 23
f3d 0:a1f9bf062855 24
f3d 0:a1f9bf062855 25
f3d 0:a1f9bf062855 26 Ticker DisplayThreadObject;
f3d 0:a1f9bf062855 27 typedef struct {
f3d 0:a1f9bf062855 28 DigitalOut & row;
f3d 0:a1f9bf062855 29 DigitalOut & col;
f3d 0:a1f9bf062855 30 int state;
f3d 0:a1f9bf062855 31 } LEDStruct;
f3d 0:a1f9bf062855 32 LEDStruct FrameBuffer[5][5] = { {{row1,col1,0}, {row2,col4,0}, {row1,col2,0}, {row2,col5,0}, {row1,col3,0}},
f3d 0:a1f9bf062855 33 {{row3,col4,0}, {row3,col5,0}, {row3,col6,0}, {row3,col7,0}, {row3,col8,0}},
f3d 0:a1f9bf062855 34 {{row2,col2,0}, {row1,col9,0}, {row2,col3,0}, {row3,col9,0}, {row2,col1,0}},
f3d 0:a1f9bf062855 35 {{row1,col8,0}, {row1,col7,0}, {row1,col6,0}, {row1,col5,0}, {row1,col4,0}},
f3d 0:a1f9bf062855 36 {{row3,col3,0}, {row2,col7,0}, {row3,col1,0}, {row2,col6,0}, {row3,col2,0}}
f3d 0:a1f9bf062855 37 };
f3d 0:a1f9bf062855 38
f3d 0:a1f9bf062855 39
f3d 0:a1f9bf062855 40 void DisplayThreadTask(void)
f3d 0:a1f9bf062855 41 {
f3d 0:a1f9bf062855 42 static int row=0;
f3d 0:a1f9bf062855 43 static int col=0;
f3d 0:a1f9bf062855 44
f3d 0:a1f9bf062855 45 // Turn off all LEDs from previous state
f3d 0:a1f9bf062855 46 for (int row=0;row<5;row++)
f3d 0:a1f9bf062855 47 {
f3d 0:a1f9bf062855 48 for (int col=0;col<5;col++)
f3d 0:a1f9bf062855 49 {
f3d 0:a1f9bf062855 50 FrameBuffer[row][col].row=0;
f3d 0:a1f9bf062855 51 FrameBuffer[row][col].col=1;
f3d 0:a1f9bf062855 52 }
f3d 0:a1f9bf062855 53 }
f3d 0:a1f9bf062855 54
f3d 0:a1f9bf062855 55 if (FrameBuffer[row][col].state==1)
f3d 0:a1f9bf062855 56 {
f3d 0:a1f9bf062855 57 // Turn LED on
f3d 0:a1f9bf062855 58 FrameBuffer[row][col].row = 1;
f3d 0:a1f9bf062855 59 FrameBuffer[row][col].col = 0;
f3d 0:a1f9bf062855 60 }
f3d 0:a1f9bf062855 61 else
f3d 0:a1f9bf062855 62 {
f3d 0:a1f9bf062855 63 // Turn LED off
f3d 0:a1f9bf062855 64 FrameBuffer[row][col].row = 0;
f3d 0:a1f9bf062855 65 FrameBuffer[row][col].col = 1;
f3d 0:a1f9bf062855 66 }
f3d 0:a1f9bf062855 67
f3d 0:a1f9bf062855 68 col++;
f3d 0:a1f9bf062855 69 if (col > 4)
f3d 0:a1f9bf062855 70 {
f3d 0:a1f9bf062855 71 col = 0;
f3d 0:a1f9bf062855 72 row ++ ;
f3d 0:a1f9bf062855 73 if (row > 4)
f3d 0:a1f9bf062855 74 row = 0;
f3d 0:a1f9bf062855 75 }
f3d 0:a1f9bf062855 76
f3d 0:a1f9bf062855 77 }
f3d 0:a1f9bf062855 78 int main() {
f3d 0:a1f9bf062855 79
f3d 0:a1f9bf062855 80 DisplayThreadObject.attach(DisplayThreadTask,0.001); // update the display once LED per millisecond
f3d 0:a1f9bf062855 81
f3d 0:a1f9bf062855 82 FrameBuffer[0][0].state = 1;
f3d 0:a1f9bf062855 83 FrameBuffer[0][1].state = 1;
f3d 0:a1f9bf062855 84 FrameBuffer[0][2].state = 1;
f3d 0:a1f9bf062855 85 FrameBuffer[0][3].state = 1;
f3d 0:a1f9bf062855 86 FrameBuffer[0][4].state = 1;
f3d 0:a1f9bf062855 87
f3d 0:a1f9bf062855 88 FrameBuffer[2][2].state = 1;
f3d 0:a1f9bf062855 89
f3d 0:a1f9bf062855 90 FrameBuffer[4][0].state = 1;
f3d 0:a1f9bf062855 91 FrameBuffer[4][1].state = 1;
f3d 0:a1f9bf062855 92 FrameBuffer[4][2].state = 1;
f3d 0:a1f9bf062855 93 FrameBuffer[4][3].state = 1;
f3d 0:a1f9bf062855 94 FrameBuffer[4][4].state = 1;
f3d 0:a1f9bf062855 95
f3d 0:a1f9bf062855 96
f3d 0:a1f9bf062855 97 while(1) {
f3d 0:a1f9bf062855 98
f3d 0:a1f9bf062855 99 }
f3d 0:a1f9bf062855 100 }