b4e1868d19
- Include option is currently "hacked" and needs to be fixed - Builds on Linux, but Mac and Windows needs to be tested - Loader script generation isn't complete
138 lines
4.1 KiB
C
138 lines
4.1 KiB
C
/* Copyright (C) 2011 by Jacob Alexander
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdint.h>
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#include <usb_keyboard_debug.h>
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#include <keymap.h>
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// Debouncing Defines
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#define SAMPLE_THRESHOLD 110
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#define MAX_SAMPLES 127 // Max is 127, reaching 128 is very bad
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// Loop over all of the sampled keys of the given array
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// If the number of samples is higher than the sample threshold, flag the high bit, clear otherwise
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// This should be resetting VERY quickly, cutting off a potentially valid keypress is not an issue
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#define DEBOUNCE_ASSESS(table,size) \
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for ( uint8_t key = 1; key < size + 1; key++ ) {\
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table[key] = ( table[key] & ~(1 << 7) ) > SAMPLE_THRESHOLD ? (1 << 7) : 0x00; \
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} \
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// NOTE: Highest Bit: Valid keypress (0x80 is valid keypress)
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// Other Bits: Pressed state sample counter
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#define KEYBOARD_SIZE 23
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uint8_t keyboardDetectArray[KEYBOARD_SIZE + 1];
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// Interrupt Variable
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volatile uint8_t sendKeypresses = 0;
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// USB Data Send
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void usb_send( uint8_t validKeys )
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{
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// TODO undo potentially old keys
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for ( uint8_t c = validKeys; c < 6; c++ )
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keyboard_keys[c] = 0;
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// Send keypresses
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usb_keyboard_send();
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// Clear sendKeypresses Flag
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sendKeypresses = 0;
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// Clear modifiers
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keyboard_modifier_keys = 0;
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}
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// Given a sampling array, and the current number of detected keypress
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// Add as many keypresses from the sampling array to the USB key send array as possible.
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void keyPressDetection( uint8_t *keys, uint8_t *validKeys, uint8_t numberOfKeys, uint8_t *modifiers, uint8_t numberOfModifiers, uint8_t *map ) {
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for ( uint8_t key = 0; key < numberOfKeys + 1; key++ ) {
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if ( keys[key] & (1 << 7) ) {
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pint8( key );
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//print(" ");
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uint8_t modFound = 0;
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// Determine if the key is a modifier
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for ( uint8_t mod = 0; mod < numberOfModifiers; mod++ ) {
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// Modifier found
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if ( modifiers[mod] == key ) {
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keyboard_modifier_keys |= map[key];
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modFound = 1;
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break;
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}
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}
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if ( modFound )
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continue;
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// Too many keys
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if ( *validKeys == 6 )
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break;
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// Allow ignoring keys with 0's
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if ( map[key] != 0 )
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keyboard_keys[(*validKeys)++] = map[key];
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}
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}
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}
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// Main Detection Loop
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void scan_loop( void )
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{
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//matrix_pinSetup( matrix_pinout );
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uint8_t count = 0;
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for ( ;; ) {
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//matrix_scan( matrix_pinout, keyboardDetectArray );
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// Check count to see if the sample threshold may have been reached, otherwise collect more data
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if ( count++ < MAX_SAMPLES )
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continue;
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// Reset Sample Counter
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count = 0;
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// Assess debouncing sample table
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//DEBOUNCE_ASSESS(keyDetectArray,KEYBOARD_SIZE)
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// Send keypresses over USB if the ISR has signalled that it's time
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if ( !sendKeypresses )
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continue;
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// Layout Setup
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uint8_t validKeys = 0;
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uint8_t *keyboard_MODMASK = keyboard_modifierMask;
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uint8_t keyboard_NUMMODS = MODIFIERS_KEYBOARD;
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uint8_t *keyboard_MAP = defaultMap;
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// TODO Layout Switching
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// TODO Macro Processing
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// Debounce Sampling Array to USB Data Array
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keyPressDetection( keyboardDetectArray, &validKeys, KEYBOARD_SIZE, keyboard_MODMASK, keyboard_NUMMODS, keyboard_MAP );
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// Send USB Data
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usb_send( validKeys );
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}
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}
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