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Turn off Interrupt Triggers and Pull Up Resistors on begin() #55

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Merged
merged 10 commits into from
Feb 9, 2021
Merged

Turn off Interrupt Triggers and Pull Up Resistors on begin() #55

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067a072
Turn off Interrupt Triggers and Pull Up Resistors on begin()
PsuFan Feb 9, 2021
1c8e611
Reset Interrupt Register If Trigger Came Before Ready
PsuFan Feb 9, 2021
a8effb6
Reset Interrupt Register If Trigger Came Before Ready
PsuFan Feb 9, 2021
6ac4db4
Attempt Clang Format Fix
PsuFan Feb 9, 2021
2a939fc
Update Adafruit_MCP23017.cpp
PsuFan Feb 9, 2021
e876ca9
Update Adafruit_MCP23017.cpp
PsuFan Feb 9, 2021
da518c9
Update Adafruit_MCP23017.cpp
PsuFan Feb 9, 2021
8716cd0
Update Adafruit_MCP23017.cpp
PsuFan Feb 9, 2021
4881529
Update Adafruit_MCP23017.cpp
PsuFan Feb 9, 2021
ffc8a64
Update Adafruit_MCP23017.cpp
PsuFan Feb 9, 2021
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10 changes: 10 additions & 0 deletions Adafruit_MCP23017.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -124,10 +124,20 @@ void Adafruit_MCP23017::begin(uint8_t addr, TwoWire *theWire) {

_wire->begin();

_wire->setClock(400000);
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plz remove


// set defaults!
// all inputs on port A and B
writeRegister(MCP23017_IODIRA, 0xff);
writeRegister(MCP23017_IODIRB, 0xff);

// Turn off interrupt triggers
writeRegister(MCP23017_GPINTENA, 0x00);
writeRegister(MCP23017_GPINTENB, 0x00);

// Turn off pull up resistors
writeRegister(MCP23017_GPPUA, 0x00);
writeRegister(MCP23017_GPPUB, 0x00);
}

/**
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5 changes: 5 additions & 0 deletions examples/interrupt/interrupt.ino
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Expand Up @@ -103,6 +103,11 @@ void cleanInterrupts(){
* and you can wait for interrupts while waiting.
*/
void loop(){
// Clear Previous Interrupts
if (digitalRead(arduinoIntPin) == LOW) {
mcp.digitalRead(0);
mcp.digitalRead(7);
}

// enable interrupts before going to sleep/wait
// And we setup a callback for the arduino INT handler.
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