georges
parent
d17d28b9b4
commit
967f64c935
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// Arduino 7 segment x 4 display
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// Define the LED digit patters, from 0 - 9
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// segment layout
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// 0
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// 5 1
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// 6
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// 4 2
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// 3 7
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// steve layout
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// 1
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// 3 2
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// 4
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// 6 0
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// 5 7
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byte steve_converter(byte inval) {
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byte outval=0;
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outval|=(inval & 0x1)<<1; // seg 0 goes to 1 (plus 1)
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outval|=(inval & 0x2)<<1; // seg 1 goes to 2 (plus 1)
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outval|=(inval & 0x4)>>2; // seg 2 goes to 0 (minus 2)
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outval|=(inval & 0x8)<<2; // seg 3 goes to 5 (plus 2)
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outval|=(inval & 0x10)<<2; // seg 4 goes to 6 (plus 2)
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outval|=(inval & 0x20)>>2; // seg 5 goes to 3 (minus 2)
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outval|=(inval & 0x40)>>2; // seg 6 goes to 4 (minus 2)
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outval|=(inval & 0x80); // dot 7 stays
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return outval;
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}
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byte seven_seg_digits[10][7] = { { 1,1,1,1,1,1,0 }, // = 0
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{ 0,1,1,0,0,0,0 }, // = 1
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{ 1,1,0,1,1,0,1 }, // = 2
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{ 1,1,1,1,0,0,1 }, // = 3
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{ 0,1,1,0,0,1,1 }, // = 4
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{ 1,0,1,1,0,1,1 }, // = 5
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{ 1,0,1,1,1,1,1 }, // = 6
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{ 1,1,1,0,0,0,0 }, // = 7
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{ 1,1,1,1,1,1,1 }, // = 8
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{ 1,1,1,0,0,1,1 } // = 9
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};
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// http://www.josepino.com/microcontroller/7-segment-ascii
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// http://www.raspberrypi.org/phpBB3/viewtopic.php?t=13645&p=142539
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uint8_t ascii2segments[] = {
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0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x02, /* ! " # $ % & ' */
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0x80, 0x0f, 0x80, 0x80, 0x04, 0x40, 0x80, 0x80, /* ( ) * + , - . / */
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0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, /* 0 1 2 3 4 5 6 7 */
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0x7F, 0x6F, 0x80, 0x80, 0x80, 0x48, 0x80, 0x27, /* 8 9 : ; < = > ? */
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0x80, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71, 0x3d, /* @ A B C D E F G */
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0x76, 0x30, 0x1E, 0x76, 0x38, 0x15, 0x37, 0x3f, /* H I J K L M N O */
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0x73, 0x67, 0x31, 0x6d, 0x78, 0x3e, 0x1C, 0x2A, /* P Q R S T U V W */
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0x76, 0x6e, 0x5b, 0x39, 0x80, 0x0F, 0x80, 0x08, /* X Y Z [ \ ] ^ _ */
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0x80, 0x5f, 0x7c, 0x58, 0x5e, 0x7b, 0x71, 0x6F, /* ` a b c d e f g */
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0x74, 0x30, 0x0E, 0x76, 0x06, 0x15, 0x54, 0x5c, /* h i j k l m n o */
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0x73, 0x67, 0x50, 0x6d, 0x78, 0x1c, 0x1c, 0x2A, /* p q r s t u v w */
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0x76, 0x6e, 0x5b, 0x39, 0x80, 0x0F, 0x80, 0x08, /* x y z { | } ~ */
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};
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//Pin connected to ST_CP of 74HC595
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int latchPin = 8;
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//Pin connected to SH_CP of 74HC595
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int clockPin = 12;
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////Pin connected to DS of 74HC595
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int dataPin = 11;
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void setup() {
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//Start Serial for debuging purposes
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Serial.begin(9600);
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//set pins to output because they are addressed in the main loop
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pinMode(latchPin, OUTPUT);
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// shiftOut(dataPin, clockPin, steve_converter(1<<7));
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}
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void shiftOut(int myDataPin, int myClockPin, byte myDataOut) {
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// This shifts 8 bits out MSB first,
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//on the rising edge of the clock,
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//clock idles low
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//internal function setup
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int i=0;
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int pinState;
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pinMode(myClockPin, OUTPUT);
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pinMode(myDataPin, OUTPUT);
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//clear everything out just in case to
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//prepare shift register for bit shifting
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digitalWrite(myDataPin, 0);
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digitalWrite(myClockPin, 0);
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//for each bit in the byte myDataOut<75>
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//NOTICE THAT WE ARE COUNTING DOWN in our for loop
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//This means that %00000001 or "1" will go through such
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//that it will be pin Q0 that lights.
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for (i=7; i>=0; i--) {
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digitalWrite(myClockPin, 0);
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//if the value passed to myDataOut and a bitmask result
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// true then... so if we are at i=6 and our value is
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// %11010100 it would the code compares it to %01000000
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// and proceeds to set pinState to 1.
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if ( myDataOut & (1<<i) ) {
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pinState= 1;
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}
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else {
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pinState= 0;
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}
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//Sets the pin to HIGH or LOW depending on pinState
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digitalWrite(myDataPin, pinState);
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//register shifts bits on upstroke of clock pin
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// delay(10);
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digitalWrite(myClockPin, 1);
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//zero the data pin after shift to prevent bleed through
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// delay(10);
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digitalWrite(myDataPin, 0);
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}
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//stop shifting
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digitalWrite(myClockPin, 0);
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}
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void loop() {
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//count up routine
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for (int j = 0; j < 9999; j++) {
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//ground latchPin and hold low for as long as you are transmitting
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digitalWrite(latchPin, 0);
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// send data, left char first
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char dataOut[5];
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sprintf(dataOut,"%04d",j);
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for(int i=0; i<4; i++) {
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shiftOut(dataPin, clockPin, steve_converter(ascii2segments[dataOut[i]-32]));
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}
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//return the latch pin high to signal chip that it
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//no longer needs to listen for information
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delay(500);
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digitalWrite(latchPin, 1);
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delay(50);
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}
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}
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