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Center column scripts and utils
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center-column/waterfall/waterfall.ino
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200
center-column/waterfall/waterfall.ino
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/*
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Example 39.1 - NXP SAA1064 I2C LED Driver IC Demo I
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Demonstrating display of digits
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http://tronixstuff.com
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*/
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#include "Wire.h" // enable I2C bus
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#include <PCA9554.h> // Load the PCA9554 Library
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byte saa1064 = 0x3B; // define the I2C bus address for our SAA1064 (pin 1 to GND) ****
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PCA9554 ioCon1(0x24); // Create an object at this address
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int digits[16]={63, 6, 91, 79, 102, 109, 125,7, 127, 111, 119, 124, 57, 94, 121, 113};
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// these are the byte representations of pins required to display each digit 0~9 then A~F
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void setup()
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{
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Serial.begin(9600);
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Wire.begin(); // start up I2C bus
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Serial.println("setting up ports");
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ioCon1.portMode(ALLOUTPUT);
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delay(500);
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initDisplay();
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lightUpIO();
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}
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void initDisplay()
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// turns on dynamic mode and adjusts segment current to 12mA
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{
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Serial.println("starting display");
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Wire.beginTransmission(saa1064);
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Wire.write(B00000000); // this is the instruction byte. Zero means the next byte is the control byte
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Wire.write(B01000111); // control byte (dynamic mode on, digits 1+3 on, digits 2+4 on, 12mA segment current
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Wire.endTransmission();
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}
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void lightUpIO() {
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Serial.println("light up IO");
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ioCon1.digitalWrite(0, LOW); // power green
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ioCon1.digitalWrite(1, HIGH); // power red
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ioCon1.digitalWrite(2, LOW); // fan green
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ioCon1.digitalWrite(3, HIGH); // fan red
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ioCon1.digitalWrite(4, LOW); // temp green
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ioCon1.digitalWrite(5, HIGH); // temp red
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ioCon1.digitalWrite(6, LOW); // lock
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}
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int cursor = 0;
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#define WORD_SIZE 25
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byte registers[4] = {0, 0, 0, 0};
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byte words[WORD_SIZE][4] = {
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{ 0x00, 0x00, 0x00, 0x00 },
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{ 0x01, 0x00, 0x00, 0x00 },
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{ 0x03, 0x00, 0x00, 0x00 },
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{ 0x03, 0x03, 0x00, 0x00 },
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{ 0x07, 0x03, 0x00, 0x00 },
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{ 0x07, 0x07, 0x00, 0x00 },
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{ 0x0F, 0x07, 0x00, 0x00 },
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{ 0x0F, 0x0F, 0x00, 0x00 },
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{ 0x1F, 0x0F, 0x00, 0x00 },
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{ 0x1F, 0x1F, 0x00, 0x00 },
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{ 0x3F, 0x1F, 0x00, 0x00 },
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{ 0x3F, 0x3F, 0x00, 0x00 },
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{ 0x7F, 0x3F, 0x00, 0x00 },
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{ 0x7F, 0x7F, 0x00, 0x00 },
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{ 0x7F, 0x7F, 0x01, 0x00 },
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{ 0x7F, 0x7F, 0x01, 0x01 },
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{ 0x7F, 0x7F, 0x03, 0x01 },
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{ 0x7F, 0x7F, 0x03, 0x03 },
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{ 0x7F, 0x7F, 0x07, 0x03 },
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{ 0x7F, 0x7F, 0x07, 0x07 },
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{ 0x7F, 0x7F, 0x0F, 0x07 },
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{ 0x7F, 0x7F, 0x0F, 0x0F },
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{ 0x7F, 0x7F, 0x1F, 0x0F },
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{ 0x7F, 0x7F, 0x3F, 0x1F },
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{ 0x7F, 0x7F, 0x7F, 0x1F }
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};
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byte words_reversed[WORD_SIZE][4] = {
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// { 0x7F, 0x7F, 0x7F, 0x1F },
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{ 0x7F, 0x7F, 0x3F, 0x1F },
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{ 0x7F, 0x7F, 0x1F, 0x0F },
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{ 0x7F, 0x7F, 0x0F, 0x0F },
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{ 0x7F, 0x7F, 0x0F, 0x07 },
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{ 0x7F, 0x7F, 0x07, 0x07 },
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{ 0x7F, 0x7F, 0x07, 0x03 },
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{ 0x7F, 0x7F, 0x03, 0x03 },
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{ 0x7F, 0x7F, 0x03, 0x01 },
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{ 0x7F, 0x7F, 0x01, 0x01 },
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{ 0x7F, 0x7F, 0x01, 0x00 },
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{ 0x7F, 0x7F, 0x00, 0x00 },
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{ 0x7F, 0x3F, 0x00, 0x00 },
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{ 0x3F, 0x3F, 0x00, 0x00 },
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{ 0x3F, 0x1F, 0x00, 0x00 },
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{ 0x1F, 0x1F, 0x00, 0x00 },
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{ 0x1F, 0x0F, 0x00, 0x00 },
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{ 0x0F, 0x0F, 0x00, 0x00 },
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{ 0x0F, 0x07, 0x00, 0x00 },
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{ 0x07, 0x07, 0x00, 0x00 },
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{ 0x07, 0x03, 0x00, 0x00 },
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{ 0x03, 0x03, 0x00, 0x00 },
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{ 0x03, 0x00, 0x00, 0x00 },
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{ 0x01, 0x00, 0x00, 0x00 }
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// { 0x00, 0x00, 0x00, 0x00 }
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};
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void displayDigits()
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// show all digits 0~9, A~F on all digits of display
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{
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Serial.println("displaying digits");
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// first array
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// 000000
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// 000001
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// 000011
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// 000111
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Wire.beginTransmission(saa1064);
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Wire.write(1);
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// write whatever we have placed in these registers
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Wire.write(registers[0]);
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Wire.write(registers[1]);
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Wire.write(registers[2]);
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Wire.write(registers[3]);
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Wire.endTransmission();
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}
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void movePage() {
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cursor = cursor + 1;
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if (cursor > (WORD_SIZE * 2)) {
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cursor = 0;
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}
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if (cursor <= 24) {
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registers[0] = words[cursor][0];
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registers[1] = words[cursor][1];
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registers[2] = words[cursor][2];
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registers[3] = words[cursor][3];
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} else {
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registers[0] = words_reversed[cursor - WORD_SIZE][0];
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registers[1] = words_reversed[cursor - WORD_SIZE][1];
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registers[2] = words_reversed[cursor - WORD_SIZE][2];
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registers[3] = words_reversed[cursor - WORD_SIZE][3];
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}
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}
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void clearDisplay()
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// clears all digits
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{
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Wire.beginTransmission(saa1064);
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Wire.write(1); // instruction byte - first digit to control is 1 (right hand side)
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Wire.write(0); // digit 1 (RHS)
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Wire.write(0); // digit 2
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Wire.write(0); // digit 3
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Wire.write(0); // digit 4 (LHS)
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Wire.endTransmission();
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}
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#define TCAADDR 0x70
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void tcaselect(uint8_t i) {
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if (i > 7) return;
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Wire.beginTransmission(TCAADDR);
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Wire.write(1 << i);
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Wire.endTransmission();
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}
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void selectLeftHalf() {
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tcaselect(2);
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}
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void selectRightHalf() {
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tcaselect(1);
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}
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void loop()
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{
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selectRightHalf();
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displayDigits();
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delay(1);
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selectLeftHalf();
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displayDigits();
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movePage();
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delay(20 + (cursor * 2));
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// clearDisplay();
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}
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/* **** We bitshift the address as the SAA1064 doesn't have the address 0x70 (ADR pin
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to GND) but 0x38 and Arduino uses 7-bit addresses- so 8-bit addresses have to
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be shifted to the right one bit. Thanks to Malcolm Cox */
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