Created
May 11, 2016 03:07
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| #include <Adafruit_GFX.h> | |
| #include <Adafruit_SSD1306.h> | |
| #include "Wire.h" | |
| extern "C" { | |
| #include "utility/twi.h" // from Wire library, so we can do bus scanning | |
| } | |
| #define TCAADDR 0x70 | |
| void tcaselect(uint8_t i) { | |
| if (i > 7) return; | |
| Wire.beginTransmission(TCAADDR); | |
| Wire.write(1 << i); | |
| Wire.endTransmission(); | |
| } | |
| Adafruit_SSD1306 displays[] = { | |
| Adafruit_SSD1306(-1), | |
| Adafruit_SSD1306(-1), | |
| Adafruit_SSD1306(-1), | |
| Adafruit_SSD1306(-1) | |
| }; | |
| int pinsSelection[] = {0, 5, 7, 6}; | |
| int initPadding = 1; | |
| void displayNumber(Adafruit_SSD1306* disp, int index) { | |
| disp->clearDisplay(); | |
| disp->setTextSize(1); | |
| disp->setTextColor(WHITE); | |
| disp->setCursor(0, 0); | |
| disp->println(String(index)); | |
| disp->display(); | |
| } | |
| void setup() { | |
| Wire.begin(); | |
| Serial.begin(9600); | |
| for (int i = 0; i < 4; i++) { | |
| tcaselect(pinsSelection[i]); | |
| displays[i].begin(SSD1306_SWITCHCAPVCC, 0x3C, false); | |
| displayNumber(&displays[i], i + 1); | |
| } | |
| initPadding += 1; | |
| } | |
| void loop() { | |
| for (int i = 0; i < 4; i++) { | |
| tcaselect(pinsSelection[i]); | |
| displayNumber(&displays[i], i + initPadding); | |
| } | |
| initPadding += 1; | |
| delay(5); | |
| } |
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