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70 lines
1.2 KiB
C++
70 lines
1.2 KiB
C++
//
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// FILE: MCP23017_digitalWrite.ino
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// AUTHOR: Rob Tillaart
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// DATE: 2019-10-14
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// PUPROSE: test MCP23017 library
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#include "MCP23017.h"
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#include "Wire.h"
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MCP23017 MCP(0x27);
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void setup()
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{
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Serial.begin(230400);
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Serial.print("MCP23017_test version: ");
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Serial.println(MCP23017_LIB_VERSION);
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Wire.begin();
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MCP.begin();
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MCP.pinMode8(0, 0x00); // 0 = output , 1 = input
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MCP.pinMode8(1, 0x00);
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Wire.setClock(50);
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Serial.println("TEST digitalWrite(0)");
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for (int i = 0; i < 16; i++)
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{
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MCP.digitalWrite(0, i % 2); // alternating HIGH/LOW
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Serial.print(i % 2);
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Serial.print('\t');
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delay(250);
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}
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Serial.println();
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Serial.println();
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Serial.println("TEST digitalWrite(pin)");
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for (int pin = 0; pin < 16; pin++)
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{
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MCP.digitalWrite(pin, 1 - pin % 2); // alternating HIGH/LOW
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Serial.print(1 - pin % 2);
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Serial.print('\t');
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}
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Serial.println();
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Serial.println();
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Serial.println("TEST read back");
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for (int pin = 0; pin < 16; pin++)
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{
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int val = MCP.digitalRead(pin);
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Serial.print(val);
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Serial.print('\t');
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}
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Serial.println();
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Serial.println();
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}
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void loop()
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{
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}
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// -- END OF FILE --
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