Не читает i2c матричную клавиатуру после портирования библиотеки с wire.h на tinywire.h
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Пт, 03/06/2016 - 22:36
Не читает i2c матричную клавиатуру после портирования библиотеки с wire.h на tinywire.h.
Где я накосячил?
Скетч:
#include <TinyWireM.h>
#include <i2ckeypad.h>
#define ROWS 3
#define COLS 3
#define PCF8574_ADDR 0x27
i2ckeypad kpd = i2ckeypad(PCF8574_ADDR, ROWS, COLS);
void setup()
{
TinyWireM.begin();
kpd.init();
pinMode(4, OUTPUT);
digitalWrite(4, HIGH);
}
void loop()
{
char key = kpd.get_key();
if(key != '\0') {
digitalWrite(4, LOW);
}
}
Исходная библиотека:
/* * i2ckeypad.cpp v0.1 - keypad/I2C expander interface for Arduino * * Copyright (c) 2009 Angel Sancho <angelitodeb@gmail.com> * All rights reserved. * * Original source from keypad v0.3 of Mark Stanley <mstanley@technologist.com> * (http://www.arduino.cc/playground/Main/KeypadTutorial) * * * LICENSE * ------- * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * * EXPLANATION * ----------- * This library is designed for use with PCF8574, but can possibly be * adapted to other I2C port expanders * * Wiring diagrams for PCF8574 and 4x3 keypad can be found under * examples directory. Library runs correctly without cols pull-up * resistors but it's better to use it * * You can change pin connections between PCF8574 and keypad under * PIN MAPPING section below * * IMPORTANT! You have to call Wire.begin() before init() in your code * * ... and sorry for my poor english! */ #include "i2ckeypad.h" #include <Wire.h> extern "C" { } /* * PIN MAPPING * * Here you can change your wire mapping between your keypad and PCF8574 * Default mapping is for sparkfun 4x3 keypad */ #define COL0 4 // P2 of PCF8574, col0 is usually pin 3 of 4x3 keypads #define COL1 5 // P0 of PCF8574, col1 is usually pin 1 of 4x3 keypads #define COL2 6 // P4 of PCF8574, col2 is usually pin 5 of 4x3 keypads #define COL3 7 // sorry, don't have a 4x4 keypad to try it #define ROW0 3 // P1 of PCF8574, row0 is usually pin 2 of 4x3 keypads #define ROW1 2 // P6 of PCF8574, row1 is usually pin 7 of 4x3 keypads #define ROW2 1 // P5 of PCF8574, row2 is usually pin 6 of 4x3 keypads #define ROW3 0 // P3 of PCF8574, row3 is usually pin 4 of 4x3 keypads /* * KEYPAD KEY MAPPING * * Default key mapping for 4x4 keypads, you can change it here if you have or * like different keys */ const char keymap[4][5] = { "123A", "456B", "789C", "*0#D" }; /* * VAR AND CONSTANTS DEFINITION. Don't change nothing here * */ // Default row and col pin counts int num_rows = 3; int num_cols = 3; // PCF8574 i2c address int pcf8574_i2c_addr; // Current search row static int row_select; // Current data set in PCF8574 static int current_data; // Hex byte statement for each port of PCF8574 const int hex_data[8] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80}; // Hex data for each row of keypad in PCF8574 const int pcf8574_row_data[4] = { hex_data[ROW1] | hex_data[ROW2] | hex_data[ROW3] | hex_data[COL0] | hex_data[COL1] | hex_data[COL2] | hex_data[COL3], hex_data[ROW0] | hex_data[ROW2] | hex_data[ROW3] | hex_data[COL0] | hex_data[COL1] | hex_data[COL2] | hex_data[COL3], hex_data[ROW0] | hex_data[ROW1] | hex_data[ROW3] | hex_data[COL0] | hex_data[COL1] | hex_data[COL2] | hex_data[COL3], hex_data[ROW0] | hex_data[ROW1] | hex_data[ROW2] | hex_data[COL0] | hex_data[COL1] | hex_data[COL2] | hex_data[COL3], }; // Hex data for each col of keypad in PCF8574 int col[4] = {hex_data[COL0], hex_data[COL1], hex_data[COL2], hex_data[COL3]}; /* * CONSTRUCTORS */ i2ckeypad::i2ckeypad(int addr) { pcf8574_i2c_addr = addr; } i2ckeypad::i2ckeypad(int addr, int r, int c) { pcf8574_i2c_addr = addr; num_rows = r; num_cols = c; } /* * PUBLIC METHODS */ void i2ckeypad::init() { // All PCF8574 ports high pcf8574_write(pcf8574_i2c_addr, 0xff); // Start with the first row row_select = 0; } char i2ckeypad::get_key() { static int temp_key; int tmp_data; int r; int key = '\0'; // Search row low pcf8574_write(pcf8574_i2c_addr, pcf8574_row_data[row_select]); for(r=0;r<num_cols;r++) { // Read pcf8574 port data tmp_data = pcf8574_byte_read(pcf8574_i2c_addr); // XOR to compare obtained data and current data and know // if some column are low tmp_data ^= current_data; // Key pressed! if(col[r] == tmp_data) { temp_key = keymap[row_select][r]; return '\0'; } } // Key was pressed and then released if((key == '\0') && (temp_key != '\0')) { key = temp_key; temp_key = '\0'; return key; } // All PCF8574 ports high again pcf8574_write(pcf8574_i2c_addr, 0xff); // Next row row_select++; if(row_select == num_rows) { row_select = 0; } return key; } /* * PRIVATE METHODS */ void i2ckeypad::pcf8574_write(int addr, int data) { current_data = data; Wire.beginTransmission(addr); Wire.write(data); Wire.endTransmission(); } int i2ckeypad::pcf8574_byte_read(int addr) { Wire.requestFrom(addr, 1); return Wire.read(); }
Модифицированная библиотека:
/* * i2ckeypad.cpp v0.1 - keypad/I2C expander interface for Arduino * * Copyright (c) 2009 Angel Sancho <angelitodeb@gmail.com> * All rights reserved. * * Original source from keypad v0.3 of Mark Stanley <mstanley@technologist.com> * (http://www.arduino.cc/playground/Main/KeypadTutorial) * * * LICENSE * ------- * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * * EXPLANATION * ----------- * This library is designed for use with PCF8574, but can possibly be * adapted to other I2C port expanders * * Wiring diagrams for PCF8574 and 4x3 keypad can be found under * examples directory. Library runs correctly without cols pull-up * resistors but it's better to use it * * You can change pin connections between PCF8574 and keypad under * PIN MAPPING section below * * IMPORTANT! You have to call Wire.begin() before init() in your code * * ... and sorry for my poor english! */ #include "i2ckeypad.h" #include <TinyWireM.h> extern "C" { } /* * PIN MAPPING * * Here you can change your wire mapping between your keypad and PCF8574 * Default mapping is for sparkfun 4x3 keypad */ #define COL0 4 // P2 of PCF8574, col0 is usually pin 3 of 4x3 keypads #define COL1 5 // P0 of PCF8574, col1 is usually pin 1 of 4x3 keypads #define COL2 6 // P4 of PCF8574, col2 is usually pin 5 of 4x3 keypads #define COL3 7 // sorry, don't have a 4x4 keypad to try it #define ROW0 3 // P1 of PCF8574, row0 is usually pin 2 of 4x3 keypads #define ROW1 2 // P6 of PCF8574, row1 is usually pin 7 of 4x3 keypads #define ROW2 1 // P5 of PCF8574, row2 is usually pin 6 of 4x3 keypads #define ROW3 0 // P3 of PCF8574, row3 is usually pin 4 of 4x3 keypads /* * KEYPAD KEY MAPPING * * Default key mapping for 4x4 keypads, you can change it here if you have or * like different keys */ const char keymap[4][5] = { "123A", "456B", "789C", "*0#D" }; /* * VAR AND CONSTANTS DEFINITION. Don't change nothing here * */ // Default row and col pin counts int num_rows = 3; int num_cols = 3; // PCF8574 i2c address int pcf8574_i2c_addr; // Current search row static int row_select; // Current data set in PCF8574 static int current_data; // Hex byte statement for each port of PCF8574 const int hex_data[8] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80}; // Hex data for each row of keypad in PCF8574 const int pcf8574_row_data[4] = { hex_data[ROW1] | hex_data[ROW2] | hex_data[ROW3] | hex_data[COL0] | hex_data[COL1] | hex_data[COL2] | hex_data[COL3], hex_data[ROW0] | hex_data[ROW2] | hex_data[ROW3] | hex_data[COL0] | hex_data[COL1] | hex_data[COL2] | hex_data[COL3], hex_data[ROW0] | hex_data[ROW1] | hex_data[ROW3] | hex_data[COL0] | hex_data[COL1] | hex_data[COL2] | hex_data[COL3], hex_data[ROW0] | hex_data[ROW1] | hex_data[ROW2] | hex_data[COL0] | hex_data[COL1] | hex_data[COL2] | hex_data[COL3], }; // Hex data for each col of keypad in PCF8574 int col[4] = {hex_data[COL0], hex_data[COL1], hex_data[COL2], hex_data[COL3]}; /* * CONSTRUCTORS */ i2ckeypad::i2ckeypad(int addr) { pcf8574_i2c_addr = addr; } i2ckeypad::i2ckeypad(int addr, int r, int c) { pcf8574_i2c_addr = addr; num_rows = r; num_cols = c; } /* * PUBLIC METHODS */ void i2ckeypad::init() { // All PCF8574 ports high pcf8574_write(pcf8574_i2c_addr, 0xff); // Start with the first row row_select = 0; } char i2ckeypad::get_key() { static int temp_key; int tmp_data; int r; int key = '\0'; // Search row low pcf8574_write(pcf8574_i2c_addr, pcf8574_row_data[row_select]); for(r=0;r<num_cols;r++) { // Read pcf8574 port data tmp_data = pcf8574_byte_read(pcf8574_i2c_addr); // XOR to compare obtained data and current data and know // if some column are low tmp_data ^= current_data; // Key pressed! if(col[r] == tmp_data) { temp_key = keymap[row_select][r]; return '\0'; } } // Key was pressed and then released if((key == '\0') && (temp_key != '\0')) { key = temp_key; temp_key = '\0'; return key; } // All PCF8574 ports high again pcf8574_write(pcf8574_i2c_addr, 0xff); // Next row row_select++; if(row_select == num_rows) { row_select = 0; } return key; } /* * PRIVATE METHODS */ void i2ckeypad::pcf8574_write(int addr, int data) { current_data = data; TinyWireM.beginTransmission(addr); TinyWireM.send(data); TinyWireM.endTransmission(); } int i2ckeypad::pcf8574_byte_read(int addr) { TinyWireM.requestFrom(addr, 1); return TinyWireM.receive(); }
Извеняюсь, забыл поставить подтягивающие резисторы.
Тема закрыта.