[#78] Keypad not working

Examples/CMakeLists.txt

@@ -14,6 +14,7 @@ add_subdirectory(PropWare_FullDuplexSerial)
 add_subdirectory(PropWare_HD44780)
 add_subdirectory(PropWare_I2C)
 add_subdirectory(PropWare_I2CSlave)
+add_subdirectory(PropWare_Keypad)
 add_subdirectory(PropWare_L3G)
 add_subdirectory(PropWare_MAX6675)
 add_subdirectory(PropWare_MCP2515)

Examples/PropWare_Keypad/CMakeLists.txt

@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.3)
+find_package(PropWare REQUIRED)
+
+project(PropWareKeypad_Demo)
+
+create_simple_executable(${PROJECT_NAME} Keypad_Demo.cpp)

Examples/PropWare_Keypad/Keypad_Demo.cpp

@@ -0,0 +1,71 @@
+/**
+ * @file    Keypad_Demo.cpp
+ *
+ * @author  David Zemon
+ *
+ * @copyright
+ * The MIT License (MIT)<br>
+ * <br>Copyright (c) 2013 David Zemon<br>
+ * <br>Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
+ * documentation files (the "Software"), to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and
+ * to permit persons to whom the Software is furnished to do so, subject to the following conditions:<br>
+ * <br>The above copyright notice and this permission notice shall be included in all copies or substantial portions
+ * of the Software.<br>
+ * <br>THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+ * TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <PropWare/hmi/input/keypad.h>
+#include <PropWare/hmi/output/printer.h>
+
+using namespace PropWare;
+
+/**
+ * @example     PropWare_Keypad/Keypad_Demo.cpp
+ *
+ * Read keys from a common 4x4 keypad to interact with a user
+ *
+ * @include PropWare_Keypad/CMakeLists.txt
+ */
+int main() {
+    Keypad::Key keys[] = {
+        Keypad::Key('1'), Keypad::Key('2'), Keypad::Key('3'), Keypad::Key('A'),
+        Keypad::Key('4'), Keypad::Key('5'), Keypad::Key('6'), Keypad::Key('B'),
+        Keypad::Key('7'), Keypad::Key('8'), Keypad::Key('9'), Keypad::Key('C'),
+        Keypad::Key('*'), Keypad::Key('0'), Keypad::Key('#'), Keypad::Key('D')
+    };
+    const Pin   rowPins[]       = {
+        Pin(Pin::P19),
+        Pin(Pin::P20),
+        Pin(Pin::P21),
+        Pin(Pin::P22),
+    };
+    const Pin   columnPins[]    = {
+        Pin(Pin::P26),
+        Pin(Pin::P25),
+        Pin(Pin::P24),
+        Pin(Pin::P23),
+    };
+
+    Keypad keypad(keys, rowPins, columnPins);
+
+    while (1) {
+        //for (auto key : keys) {
+        //    if (keypad.is_pressed(key.get_character()))
+        //        pwOut << key.get_character() << '\n';
+        //}
+
+        keypad.get_keys();
+        for (size_t i = 0; i < Utility::size_of_array(keys); ++i) {
+            if (0 == i % 4)
+                pwOut << '\n';
+            pwOut << (keys[i].get_state() ? keys[i].get_character() : ' ') << ' ';
+        }
+
+        waitcnt(100*MILLISECOND + CNT);
+    }
+}

PropWare/CMakeLists.txt

@@ -12,6 +12,7 @@ set(PROPWARE_SOURCES
     ${CMAKE_CURRENT_LIST_DIR}/gpio/pin.h
     ${CMAKE_CURRENT_LIST_DIR}/gpio/port.h
     ${CMAKE_CURRENT_LIST_DIR}/gpio/simpleport.h
+    ${CMAKE_CURRENT_LIST_DIR}/hmi/input/keypad.h
     ${CMAKE_CURRENT_LIST_DIR}/hmi/input/scancapable.h
     ${CMAKE_CURRENT_LIST_DIR}/hmi/input/scanner.cpp
     ${CMAKE_CURRENT_LIST_DIR}/hmi/input/scanner.h

PropWare/hmi/input/keypad.h

@@ -0,0 +1,153 @@
+/**
+ * @file    PropWare/hmi/input/keypad.h
+ *
+ * @author  David Zemon
+ *
+ * @copyright
+ * The MIT License (MIT)<br>
+ * <br>Copyright (c) 2013 David Zemon<br>
+ * <br>Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
+ * documentation files (the "Software"), to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and
+ * to permit persons to whom the Software is furnished to do so, subject to the following conditions:<br>
+ * <br>The above copyright notice and this permission notice shall be included in all copies or substantial portions
+ * of the Software.<br>
+ * <br>THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+ * TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#pragma once
+
+#include <PropWare/gpio/pin.h>
+#include <PropWare/utility/utility.h>
+
+namespace PropWare {
+
+class Keypad {
+    public:
+        class Key {
+            public:
+                friend class Keypad;
+
+            public:
+                Key(const char character)
+                    : character(character),
+                      state(false) {
+                }
+
+                char get_character() const {
+                    return this->character;
+                }
+
+
+                bool get_state() const {
+                    return this->state;
+                }
+
+            protected:
+                char character;
+                bool state;
+        };
+
+    public:
+        /**
+         * MAPSIZE is the number of rows (times 16 columns)
+         */
+        static const unsigned int DEFAULT_BOUNCE_TIME_MS = 10;
+
+    public:
+        /**
+         * Allows custom m_keymap, pin configuration, and keypad sizes
+         */
+        template<size_t ROW_SIZE, size_t COLUMN_SIZE>
+        Keypad(Key keys[], const Pin (&rowPins)[ROW_SIZE], const Pin (&columnPins)[COLUMN_SIZE])
+            : m_keys(keys),
+              m_rowPins(rowPins),
+              m_columnPins(columnPins),
+              m_rows(ROW_SIZE),
+              m_columns(COLUMN_SIZE),
+              m_keyCount(this->m_rows * this->m_columns),
+              m_startTime(CNT - DEFAULT_BOUNCE_TIME_MS * MILLISECOND) {
+            this->set_debounce_time(Keypad::DEFAULT_BOUNCE_TIME_MS);
+        }
+
+        /**
+         * Populate the key list
+         */
+
+        bool is_pressed(const char character) {
+            this->get_keys();
+
+            for (uint_fast8_t i = 0; i < this->m_keyCount; i++)
+                if (character == this->m_keys[i].character) {
+                    return this->m_keys[i].state;
+                }
+            return false;
+        }
+
+        bool get_keys() {
+            bool keyActivity = false;
+
+            // Limit how often the keypad is scanned. This makes the loop() run 10 times as fast.
+            if ((CNT - this->m_startTime) > this->m_debounceTime) {
+                this->scan_keys();
+                this->m_startTime = CNT;
+            }
+
+            return keyActivity;
+        }
+
+        /**
+         * Minimum debounceTime is 1 mS.
+         */
+        void set_debounce_time(const uint32_t debounceMs) {
+            if (!debounceMs)
+                this->m_debounceTime = MILLISECOND;
+            else
+                this->m_debounceTime = debounceMs * MILLISECOND;
+        }
+
+    private:
+
+        /**
+         * Hardware scan
+         */
+        void scan_keys() {
+            for (uint_fast8_t row = 0; row < this->m_rows; row++) {
+                this->m_rowPins[row].set_dir_in();
+                this->m_rowPins[row].high();
+            }
+
+            // bitMap stores ALL the keys that are being pressed.
+            for (uint_fast8_t column = 0; column < this->m_columns; ++column) {
+                // Begin column pulse output.
+                this->m_columnPins[column].low();
+                this->m_columnPins[column].set_dir_out();
+
+                for (uint_fast8_t row = 0; row < this->m_rows; ++row) {
+                    const uint_fast8_t keyIndex = column * 4 + row;
+                    this->m_keys[keyIndex].state = !this->m_rowPins[row].read();
+                }
+
+                // Set pin to high impedance input. Effectively ends column pulse.
+                this->m_columnPins[column].high();
+                this->m_columnPins[column].set_dir_in();
+            }
+        }
+
+    private:
+        Key                *m_keys;
+        const Pin          *m_rowPins;
+        const Pin          *m_columnPins;
+        const uint_fast8_t m_rows;
+        const uint_fast8_t m_columns;
+        const uint_fast8_t m_keyCount;
+
+        uint32_t          m_debounceTime;
+        volatile uint32_t m_startTime;
+};
+
+}