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First commit input_pullup

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This commit is contained in:
Renzo Mischianti 2019-10-29 22:04:03 +01:00
parent 14ebfa3025
commit 2d5584f665
2 changed files with 57 additions and 18 deletions
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67
PCF8574.cpp
View File

@ -173,7 +173,10 @@ void PCF8574::begin(){
DEBUG_PRINT("usedPin pin ");
byte usedPin = writeMode | readMode;
byte usedPin = writeMode | readModePullUp;
DEBUG_PRINTLN( writeMode, BIN);
DEBUG_PRINTLN( readModePullUp, BIN);
DEBUG_PRINTLN( readModePullDown, BIN);
DEBUG_PRINTLN( ~usedPin, BIN);
_wire->write(~usedPin);
@ -206,18 +209,37 @@ void PCF8574::pinMode(uint8_t pin, uint8_t mode){
if (mode == OUTPUT){
writeMode = writeMode | bit(pin);
readMode = readMode & ~bit(pin);
readModePullDown = readModePullDown & ~bit(pin);
readModePullUp = readModePullUp & ~bit(pin);
DEBUG_PRINT("writeMode: ");
DEBUG_PRINT(writeMode, BIN);
DEBUG_PRINT("readMode: ");
DEBUG_PRINT("readMode ALL: ");
DEBUG_PRINTLN(readMode, BIN);
}else if (mode == INPUT){
writeMode = writeMode & ~bit(pin);
readMode = readMode | bit(pin);
readMode = readMode | bit(pin);
readModePullDown = readModePullDown | bit(pin);
readModePullUp = readModePullUp & ~bit(pin);
DEBUG_PRINT("writeMode: ");
DEBUG_PRINT(writeMode, BIN);
DEBUG_PRINT("readMode: ");
DEBUG_PRINT("readMode ALL: ");
DEBUG_PRINTLN(readMode, BIN);
}else if (mode == INPUT_PULLUP){
writeMode = writeMode & ~bit(pin);
readMode = readMode | bit(pin);
readModePullDown = readModePullDown & ~bit(pin);
readModePullUp = readModePullUp | bit(pin);
DEBUG_PRINT("writeMode: ");
DEBUG_PRINT(writeMode, BIN);
DEBUG_PRINT("readMode ALL: ");
DEBUG_PRINTLN(readMode, BIN);
}
else{
@ -239,7 +261,8 @@ void PCF8574::readBuffer(bool force){
if(_wire->available()) // If bytes are available to be recieved
{
byte iInput = _wire->read();// Read a byte
if ((iInput & readMode)>0){
if ((iInput & readModePullDown)>0 and (~iInput & readModePullUp)>0){
// if ((iInput & readMode)>0){
byteBuffered = byteBuffered | (byte)iInput;
}
}
@ -261,7 +284,8 @@ void PCF8574::readBuffer(bool force){
DEBUG_PRINTLN("Data ready");
byte iInput = _wire->read();// Read a byte
if ((iInput & readMode)>0){
if ((iInput & readModePullDown)>0 and (~iInput & readModePullUp)>0){
// if ((iInput & readMode)>0){
DEBUG_PRINT("Input ");
DEBUG_PRINTLN((byte)iInput, BIN);
@ -283,7 +307,7 @@ void PCF8574::readBuffer(bool force){
if ((bit(6) & readMode)>0) digitalInput.p6 = ((byteBuffered & bit(6))>0)?HIGH:LOW;
if ((bit(7) & readMode)>0) digitalInput.p7 = ((byteBuffered & bit(7))>0)?HIGH:LOW;
if ((readMode & byteBuffered)>0){
if ((byteBuffered & readModePullDown)>0 and (~byteBuffered & readModePullUp)>0){
byteBuffered = ~readMode & byteBuffered;
DEBUG_PRINT("Buffer hight value readed set readed ");
DEBUG_PRINTLN(byteBuffered, BIN);
@ -306,7 +330,8 @@ void PCF8574::readBuffer(bool force){
DEBUG_PRINTLN("Data ready");
byte iInput = _wire->read();// Read a byte
if ((iInput & readMode)>0){
if ((iInput & readModePullDown)>0 and (~iInput & readModePullUp)>0){
// if ((iInput & readMode)>0){
DEBUG_PRINT("Input ");
DEBUG_PRINTLN((byte)iInput, BIN);
@ -321,7 +346,8 @@ void PCF8574::readBuffer(bool force){
byte byteRead = byteBuffered;
if ((readMode & byteBuffered)>0){
if ((byteBuffered & readModePullDown)>0 and (~byteBuffered & readModePullUp)>0){
// if ((readMode & byteBuffered)>0){
byteBuffered = ~readMode & byteBuffered;
DEBUG_PRINT("Buffer hight value readed set readed ");
DEBUG_PRINTLN(byteBuffered, BIN);
@ -338,13 +364,17 @@ void PCF8574::readBuffer(bool force){
* @return
*/
uint8_t PCF8574::digitalRead(uint8_t pin){
uint8_t value = LOW;
uint8_t value = (bit(pin) & readModePullDown)?LOW:HIGH;
DEBUG_PRINT("Read pin ");
DEBUG_PRINTLN(pin);
// Check if pin already HIGH than read and prevent reread of i2c
if ((bit(pin) & byteBuffered)>0){
DEBUG_PRINTLN("Pin already up");
value = HIGH;
if (((bit(pin) & readModePullDown & byteBuffered)>0) and (bit(pin) & readModePullUp & ~byteBuffered) ){
DEBUG_PRINTLN("Pin already set");
if ((bit(pin) & readModePullDown & byteBuffered)>0) {
value = HIGH;
}else{
value = LOW;
}
}else if ((/*(bit(pin) & byteBuffered)<=0 && */millis() > PCF8574::lastReadMillis+READ_ELAPSED_TIME) /*|| _usingInterrupt*/){
DEBUG_PRINTLN("Read from buffer");
_wire->requestFrom(_address,(uint8_t)1);// Begin transmission to PCF8574 with the buttons
@ -354,7 +384,8 @@ uint8_t PCF8574::digitalRead(uint8_t pin){
DEBUG_PRINTLN("Data ready");
byte iInput = _wire->read();// Read a byte
if ((iInput & readMode)>0){
if ((iInput & readModePullDown)>0 and (~iInput & readModePullUp)>0){
// if ((iInput & readMode)>0){
DEBUG_PRINT("Input ");
DEBUG_PRINTLN((byte)iInput, BIN);
@ -364,6 +395,8 @@ uint8_t PCF8574::digitalRead(uint8_t pin){
if ((bit(pin) & byteBuffered)>0){
value = HIGH;
}else{
value = LOW;
}
}
}
@ -371,10 +404,14 @@ uint8_t PCF8574::digitalRead(uint8_t pin){
DEBUG_PRINT("Buffer value ");
DEBUG_PRINTLN(byteBuffered, BIN);
// If HIGH set to low to read buffer only one time
if (value==HIGH){
if ((bit(pin) & readModePullDown) and value==HIGH){
byteBuffered = ~bit(pin) & byteBuffered;
DEBUG_PRINT("Buffer hight value readed set readed ");
DEBUG_PRINTLN(byteBuffered, BIN);
}else if ((bit(pin) & readModePullUp) and value==LOW){
byteBuffered = bit(pin) & byteBuffered;
DEBUG_PRINT("Buffer low value readed set readed ");
DEBUG_PRINTLN(byteBuffered, BIN);
}
DEBUG_PRINT("Return value ");
DEBUG_PRINTLN(value);

8
PCF8574.h
View File

@ -145,9 +145,11 @@ private:
uint8_t _interruptPin = 2;
void (*_interruptFunction)(){};
byte writeMode = B00000000;
byte readMode = B00000000;
byte byteBuffered = B00000000;
byte writeMode = B00000000;
byte readMode = B00000000;
byte readModePullUp = B00000000;
byte readModePullDown = B00000000;
byte byteBuffered = B00000000;
unsigned long lastReadMillis = 0;
byte writeByteBuffered = B00000000;