52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
// Display values for six ADCs.
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// On Uno, ADC4 and ADC5 are I2C pins.
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#include <Wire.h>
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#include "SSD1306Ascii.h"
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#include "SSD1306AsciiWire.h"
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// 0X3C+SA0 - 0x3C or 0x3D
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#define I2C_ADDRESS 0x3C
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// Define proper RST_PIN if required.
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#define RST_PIN -1
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SSD1306AsciiWire oled;
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uint8_t col[2]; // Columns for ADC values.
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uint8_t rows; // Rows per line.
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//------------------------------------------------------------------------------
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void setup() {
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Wire.begin();
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Wire.setClock(400000L);
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#if RST_PIN >= 0
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oled.begin(&Adafruit128x64, I2C_ADDRESS, RST_PIN);
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#else // RST_PIN >= 0
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oled.begin(&Adafruit128x64, I2C_ADDRESS);
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#endif // RST_PIN >= 0
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oled.setFont(System5x7);
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oled.clear();
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// Setup form. Could use F() macro to save RAM on AVR.
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oled.println("ADC0: 9999 ADC1: 9999");
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oled.println("ADC2: 9999 ADC3: 9999");
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oled.println("ADC4: 9999 ADC5: 9999");
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// Calculate columns for ADC values. No RAM is used by strings.
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// Compiler replaces strlen() calc with 6 and 17.
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col[0] = oled.fieldWidth(strlen("ADC0: "));
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col[1] = oled.fieldWidth(strlen("ADC0: 9999 ADC1: "));
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rows = oled.fontRows();
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delay(3000);
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}
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//------------------------------------------------------------------------------
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void loop() {
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for (uint8_t i = 0; i < 6; i++) {
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oled.clearField(col[i%2], rows*(i/2), 4);
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oled.print(analogRead(i));
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}
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delay(1000);
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}
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