EldritchE
commented
1 year ago OK ! I found a solution! Actually an error. I did not specify the PCF8575 parameter in object creation :) My mistake.
The code that works correctly with PCF8575 :) looks like this :)
| /* @file CustomKeypad.pde | @version 1.0 | @author Alexander Brevig | @contact alexanderbrevig@gmail.com | |||
|---|---|---|---|---|---|---|
| @description | ||||||
| Demonstrates changing the keypad size and key values. | ||||||
| # |
Use with I2C i/o G. D. (Joe) Young Feb 28/12*/
include
include // GDY120705
include
define I2CADDR 0x20
const byte ROWS = 4; //four rows const byte COLS = 4; //four columns //define the cymbols on the buttons of the keypads char hexaKeys[ROWS][COLS] = { {'0','1','2','3'}, {'4','5','6','7'}, {'8','9','A','B'}, {'C','D','E','F'} }; byte rowPins[ROWS] = {3, 2, 1, 0}; //connect to the row pinouts of the keypad byte colPins[COLS] = {7, 6, 5, 4}; //connect to the column pinouts of the keypad
//initialize an instance of class NewKeypad Keypad_I2C customKeypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS, I2CADDR,PCF8575);
void setup(){ Wire.begin( ); // GDY200622 customKeypad.begin( ); // GDY120705 Serial.begin(9600); }
void loop(){ char customKey = customKeypad.getKey();
if (customKey != NO_KEY){ Serial.println(customKey); } }
joeyoung
I connected everything correctly but unfortunately the CustomKeypad example does not work for me. I use PCF8575, I correctly specified the address at 0x20> I connected one button to pins P0 and P6 on the expander, but no effect.
On the serial monitor, I have no reaction to pressing a button.
include
include // GDY120705
include
define I2CADDR 0x20
const byte ROWS = 4; //four rows const byte COLS = 4; //four columns //define the cymbols on the buttons of the keypads char hexaKeys[ROWS][COLS] = { {'0','1','2','3'}, {'4','5','6','7'}, {'8','9','A','B'}, {'C','D','E','F'} }; byte rowPins[ROWS] = {3, 2, 1, 0}; //connect to the row pinouts of the keypad byte colPins[COLS] = {12, 11, 10, 9}; //connect to the column pinouts of the keypad
//initialize an instance of class NewKeypad Keypad_I2C customKeypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS, I2CADDR);
void setup(){ Wire.begin( ); // GDY200622 customKeypad.begin( ); // GDY120705 Serial.begin(9600); }
void loop(){ char customKey = customKeypad.getKey();
if (customKey != NO_KEY){ Serial.println(customKey); } }