123 lines
3.1 KiB
C++
123 lines
3.1 KiB
C++
/*
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||
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|| @file Keypad_tw.h
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|| @version 1.0 - Convert Keypad_I2C to use TinyWireM library for ATtiny micros
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|| @version 2.0 - PCF8575 support added by Paul Williamson
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|| @author G. D. (Joe) Young, ptw
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|| @contact "G. D. (Joe) Young" <gdyoung@islandnet.com>
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||
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|| @description
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|| | Keypad_tw provides an interface for using matrix keypads that
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|| | are attached with I2C port expanders. It supports multiple keypads,
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|| | user selectable pins, and user defined keymaps.
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|| |
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|| | This version replaces all references to Wire functions (TwoWire) with
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|| | their TinyWireM (USI_TWI) equivalents
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|| #
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||
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|| @license
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|| | This library is free software; you can redistribute it and/or
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|| | modify it under the terms of the GNU Lesser General Public
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|| | License as published by the Free Software Foundation; version
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|| | 2.1 of the License.
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|| |
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|| | This library is distributed in the hope that it will be useful,
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|| | but WITHOUT ANY WARRANTY; without even the implied warranty of
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|| | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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|| | Lesser General Public License for more details.
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|| |
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|| | You should have received a copy of the GNU Lesser General Public
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|| | License along with this library; if not, write to the Free Software
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|| | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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|| #
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||
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*/
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#include "Keypad_tw.h"
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// Let the user define a keymap - assume the same row/column count as defined in constructor
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void Keypad_tw::begin(char *userKeymap) {
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Keypad::begin(userKeymap);
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pinState = pinState_set( );
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}
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// Initialize tw
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void Keypad_tw::begin(void) {
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// pinState = 0xff;
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pinState = pinState_set( );
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}
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#if 0
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// Initialize tw //TinyWireM does not allow re-assigning bus adr
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void Keypad_tw::begin(byte address) {
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twaddr = address;
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USI_TWI::begin(address);
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// pinState = 0xff;
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pinState = pinState_set( );
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}
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// Initialize tw
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void Keypad_tw::begin(int address) {
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twaddr = address;
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USI_TWI::begin(address);
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// pinState = 0xff;
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pinState = pinState_set( );
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}
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#endif
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void Keypad_tw::pin_write(byte pinNum, boolean level) {
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word mask = 1<<pinNum;
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if( level == HIGH ) {
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pinState |= mask;
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} else {
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pinState &= ~mask;
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}
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port_write( pinState );
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} // twxWrite( )
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int Keypad_tw::pin_read(byte pinNum) {
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word mask = 0x1<<pinNum;
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Wire.requestFrom((int)twaddr, (int)twwidth);
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word pinVal = Wire.read( );
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if (twwidth > 1) {
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pinVal |= Wire.read( ) << 8;
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}
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pinVal &= mask;
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if( pinVal == mask ) {
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return 1;
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} else {
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return 0;
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}
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}
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void Keypad_tw::port_write( word twportval ) {
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Wire.beginTransmission((int)twaddr);
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Wire.write( twportval & 0x00FF);
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if (twwidth > 1) {
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Wire.write( twportval >> 8 );
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}
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Wire.endTransmission();
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pinState = twportval;
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} // port_write( )
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word Keypad_tw::pinState_set( ) {
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Wire.requestFrom( (int)twaddr, (int)twwidth );
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pinState = Wire.read( );
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if (twwidth > 1) {
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pinState |= Wire.read( ) << 8;
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}
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return pinState;
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} // set_pinState( )
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/*
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|| @changelog
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|| | 1.0 2015-05-24 - Joe Young : initial conversion from Wire to TinyWireM
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|| |
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|| | 2.0 2013-08-31 - Paul Williamson : Added i2cwidth parameter for PCF8575 support
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|| |
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|| | 1.0 2012-07-12 - Joe Young : Initial Release
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|| #
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*/
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