1 /* Copyright (C) 2011-2013 by Joseph Makuch
2 * Additions by Jacob Alexander (2013)
4 * dfj, put whatever license here you want -HaaTa
7 // ----- Includes -----
10 #include <Lib/ScanLib.h>
17 #include "scan_loop.h"
21 // ----- Defines -----
23 // TODO dfj defines...needs cleaning up and commenting...
24 #define LED_CONFIG (DDRD |= (1<<6))
25 #define LED_ON (PORTD &= ~(1<<6))
26 #define LED_OFF (PORTD |= (1<<6))
27 #define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
29 #define MAX_PRESS_DELTA_MV 470
30 #define THRESHOLD_MV (MAX_PRESS_DELTA_MV >> 1)
31 //(2560 / (0x3ff/2)) ~= 5
35 #define THRESHOLD (THRESHOLD_MV / MV_PER_ADC)
37 #define BUMP_DETECTION 0
38 #define BUMP_THRESHOLD 0x50
40 #define BUMP_REST_US 1200
42 #define STROBE_SETTLE 1
48 #define TEST_KEY_STROBE (0x05)
49 #define TEST_KEY_MASK (1 << 0)
53 /** Whether to use all of D and C, vs using E0, E1 instead of D6, D7,
54 * or alternately all of D, and E0,E1 and C0,..5 */
59 // rough offset voltage: one diode drop, about 50mV = 0x3ff * 50/3560 = 20
60 //#define OFFSET_VOLTAGE 0x14
61 //#define OFFSET_VOLTAGE 0x28
64 #define RIGHT_JUSTIFY 0
65 #define LEFT_JUSTIFY (0xff)
67 // set left or right justification here:
68 #define JUSTIFY_ADC RIGHT_JUSTIFY
70 #define ADLAR_MASK (1 << ADLAR)
72 #define ADLAR_BITS ((ADLAR_MASK) & (JUSTIFY_ADC))
73 #else // defaults to right justification.
79 #define FULL_MUX_MASK ((1 << MUX0) | (1 << MUX1) | (1 << MUX2) | (1 << MUX3) | (1 << MUX4))
81 // F0-f7 pins only muxmask.
82 #define MUX_MASK ((1 << MUX0) | (1 << MUX1) | (1 << MUX2))
84 #define SET_MUX(X) ((ADMUX) = (((ADMUX) & ~(MUX_MASK)) | ((X) & (MUX_MASK))))
85 #define SET_FULL_MUX(X) ((ADMUX) = (((ADMUX) & ~(FULL_MUX_MASK)) | ((X) & (FULL_MUX_MASK))))
91 // set ADC clock prescale
92 #define PRESCALE_MASK ((1 << ADPS0) | (1 << ADPS1) | (1 << ADPS2))
93 #define PRESCALE_SHIFT (ADPS0)
97 #ifdef EXTENDED_STROBE
99 #define STROBE_LINES 18
103 #define STROBE_LINES 16
107 #define STROBE_LINES_XSHIFT 4
108 #define STROBE_LINES_MASK 0x0f
109 #define MUXES_COUNT 8
110 #define MUXES_COUNT_XSHIFT 3
111 #define MUXES_MASK 0x7
113 #define WARMUP_LOOPS ( 1024 )
115 #define RECOVERY_US 2
120 #define SAMPLE_OFFSET ((SAMPLES) - MUXES_COUNT)
121 //#define SAMPLE_OFFSET 9
122 #define STROBE_OFFSET 0
124 #define SAMPLE_CONTROL 3
126 //#define DEFAULT_KEY_BASE 0xc8
127 #define DEFAULT_KEY_BASE 0x95
129 #define KEY_COUNT ((STROBE_LINES) * (MUXES_COUNT))
134 #define RECOVERY_CONTROL 1
136 #define RECOVERY_SOURCE 0
137 #define RECOVERY_SINK 2
138 #define RECOVERY_MASK 0x03
144 // mix in 1/4 of the current average to the running average. -> (@mux_mix = 2)
148 #define IDLE_COUNT_MASK 0xff
149 #define IDLE_COUNT_MAX (IDLE_COUNT_MASK + 1)
150 #define IDLE_COUNT_SHIFT 8
152 #define KEYS_AVERAGES_MIX 2
157 #define D_MASK (0xff)
160 #define E_MASK (0x00)
163 #define C_MASK (0xff)
169 #define D_MASK (0x3f)
172 #define E_MASK (0x03)
175 #define C_MASK (0xff)
181 #define D_MASK (0xff)
184 #define E_MASK (0x03)
187 #define C_MASK (0xff)
197 // ----- Macros -----
199 // Make sure we haven't overflowed the buffer
200 #define bufferAdd(byte) \
201 if ( KeyIndex_BufferUsed < KEYBOARD_BUFFER ) \
202 KeyIndex_Buffer[KeyIndex_BufferUsed++] = byte
205 // TODO dfj macros...needs cleaning up and commenting...
206 #define STROBE_CASE(SC_CASE, SC_REG_A) case (SC_CASE): PORT##SC_REG_A = \
207 (( (PORT##SC_REG_A) & ~(1 << (SC_CASE - SC_REG_A##_SHIFT)) ) | (1 << (SC_CASE - SC_REG_A##_SHIFT)))
209 #define SET_MUX(X) ((ADMUX) = (((ADMUX) & ~(MUX_MASK)) | ((X) & (MUX_MASK))))
210 #define SET_FULL_MUX(X) ((ADMUX) = (((ADMUX) & ~(FULL_MUX_MASK)) | ((X) & (FULL_MUX_MASK))))
216 // ----- Variables -----
218 // Buffer used to inform the macro processing module which keys have been detected as pressed
219 volatile uint8_t KeyIndex_Buffer[KEYBOARD_BUFFER];
220 volatile uint8_t KeyIndex_BufferUsed;
223 // TODO dfj variables...needs cleaning up and commenting
225 volatile uint16_t full_av = 0;
227 /**/ uint8_t ze_strober = 0;
229 uint16_t samples [SAMPLES];
231 //int16_t gsamples [SAMPLES];
233 int16_t adc_mux_averages[MUXES_COUNT];
234 int16_t adc_strobe_averages[STROBE_LINES];
237 uint8_t cur_keymap[STROBE_LINES];
238 // /**/ int8_t last_keymap[STROBE_LINES];
239 uint8_t usb_keymap[STROBE_LINES];
240 uint16_t keys_down=0;
246 uint16_t threshold = 0x25; // HaaTa Hack -TODO
247 //uint16_t threshold = 0x16; // HaaTa Hack -TODO
248 //uint16_t threshold = THRESHOLD;
258 uint16_t keys_averages_acc[KEY_COUNT];
259 uint16_t keys_averages[KEY_COUNT];
260 uint16_t keys_averages_acc_count=0;
262 uint8_t full_samples[KEY_COUNT];
265 // #define COUNT_MASK 0x9fff
266 // #define COUNT_HIGH_BIT (INT16_MIN)
267 // TODO: change this to 'booting', then count down.
268 uint16_t boot_count = 0;
270 uint16_t idle_count=0;
276 uint16_t error_data = 0;
279 int16_t mux_averages[MUXES_COUNT];
280 int16_t strobe_averages[STROBE_LINES];
282 uint8_t dump_count = 0;
286 uint16_t db_delta = 0;
287 uint8_t db_sample = 0;
288 uint16_t db_threshold = 0;
292 // ----- Function Declarations -----
295 void dumpkeys( void );
297 void recovery( uint8_t on );
299 int sampleColumn( uint8_t column );
301 void setup_ADC( void );
303 void strobe_w( uint8_t strobe_num );
305 uint8_t testColumn( uint8_t strobe );
309 // ----- Functions -----
311 // Initial setup for cap sense controller
312 inline void scan_setup()
314 // TODO dfj code...needs cleanup + commenting...
327 //uint16_t strobe = 1;
330 // TODO all this code should probably be in scan_resetKeyboard
331 for (int i=0; i < STROBE_LINES; ++i) {
333 //last_keymap[i] = 0;
337 for(int i=0; i < MUXES_COUNT; ++i) {
338 adc_mux_averages[i] = 0x20; // experimentally determined.
340 for(int i=0; i < STROBE_LINES; ++i) {
341 adc_strobe_averages[i] = 0x20; // yup.
344 for(int i=0; i < KEY_COUNT; ++i) {
345 keys_averages[i] = DEFAULT_KEY_BASE;
346 keys_averages_acc[i] = (DEFAULT_KEY_BASE);
349 /** warm things up a bit before we start collecting data, taking real samples. */
350 for(uint8_t i = 0; i < STROBE_LINES; ++i) {
355 // Reset the keyboard before scanning, we might be in a wierd state
356 // Also sets the KeyIndex_BufferUsed to 0
357 scan_resetKeyboard();
361 // Main Detection Loop
362 // This is where the important stuff happens
363 inline uint8_t scan_loop()
365 // TODO dfj code...needs commenting + cleanup...
367 uint32_t full_av_acc = 0;
369 for (strober = 0; strober < STROBE_LINES; ++strober) {
373 while (tries++ && sampleColumn(strober)) { tries &= 0x7; } // don't waste this one just because the last one was poop.
374 column = testColumn(strober);
376 idle |= column; // if column has any pressed keys, then we are not idle.
378 if( column != cur_keymap[strober] && (boot_count >= WARMUP_LOOPS) ) {
381 cur_keymap[strober] = column;
385 idle |= usb_dirty; // if any keys have changed inc. released, then we are not idle.
388 error_data |= (((uint16_t)strober) << 12);
391 uint8_t strobe_line = strober << MUXES_COUNT_XSHIFT;
392 for(int i=0; i<MUXES_COUNT; ++i) {
393 // discard sketchy low bit, and meaningless high bits.
394 uint8_t sample = samples[SAMPLE_OFFSET + i] >> 1;
395 full_samples[strobe_line + i] = sample;
396 keys_averages_acc[strobe_line + i] += sample;
398 keys_averages_acc_count++;
400 strobe_averages[strober] = 0;
401 for (uint8_t i = SAMPLE_OFFSET; i < (SAMPLE_OFFSET + MUXES_COUNT); ++i) {
402 //samples[i] -= samples[i-SAMPLE_OFFSET]; // av; // + full_av); // -something.
403 //samples[i] -= OFFSET_VOLTAGE; // moved to sampleColumn.
405 full_av_acc += (samples[i]);
406 #ifdef COLLECT_STROBE_AVERAGES
407 mux_averages[i - SAMPLE_OFFSET] += samples[i];
408 strobe_averages[strober] += samples[i];
410 //samples[i] -= (full_av - HYST_T);
415 #ifdef COLLECT_STROBE_AVERAGES
416 adc_strobe_averages[strober] += strobe_averages[strober] >> 3;
417 adc_strobe_averages[strober] >>= 1;
419 /** test if we went negative. */
420 if ((adc_strobe_averages[strober] & 0xFF00) && (boot_count
422 error = 0xf; error_data = adc_strobe_averages[strober];
427 #ifdef VERIFY_TEST_PAD
428 // verify test key is not down.
429 if((cur_keymap[TEST_KEY_STROBE] & TEST_KEY_MASK) ) {
432 error_data = cur_keymap[TEST_KEY_STROBE] << 8;
433 error_data += full_samples[TEST_KEY_STROBE * 8];
438 #ifdef COLLECT_STROBE_AVERAGES
439 // calc mux averages.
440 if (boot_count < WARMUP_LOOPS) {
441 full_av += (full_av_acc >> (7));
443 //full_av = full_av_acc / count;
446 for (int i=0; i < MUXES_COUNT; ++i) {
447 #define MUX_MIX 2 // mix in 1/4 of the current average to the running average. -> (@mux_mix = 2)
448 adc_mux_averages[i] = (adc_mux_averages[i] << MUX_MIX) - adc_mux_averages[i];
449 adc_mux_averages[i] += (mux_averages[i] >> 4);
450 adc_mux_averages[i] >>= MUX_MIX;
457 // av = (av << shift) - av + sample; av >>= shift
458 // e.g. 1 -> (av + sample) / 2 simple average of new and old
459 // 2 -> (3 * av + sample) / 4 i.e. 3:1 mix of old to new.
460 // 3 -> (7 * av + sample) / 8 i.e. 7:1 mix of old to new.
461 #define KEYS_AVERAGES_MIX_SHIFT 3
463 /** aggregate if booting, or if idle;
464 * else, if not booting, check for dirty USB.
468 idle_count &= IDLE_COUNT_MASK;
470 idle = idle && !keys_down;
472 if (boot_count < WARMUP_LOOPS) {
474 error_data = boot_count;
476 } else { // count >= WARMUP_LOOPS
478 for (int i=0; i < STROBE_LINES; ++i) {
479 usb_keymap[i] = cur_keymap[i];
484 memset(((void *)keys_averages_acc), 0, (size_t)(KEY_COUNT * sizeof (uint16_t)));
485 keys_averages_acc_count = 0;
494 for (uint8_t i = 0; i < KEY_COUNT; ++i) {
495 uint16_t acc = keys_averages_acc[i] >> IDLE_COUNT_SHIFT;
496 uint32_t av = keys_averages[i];
498 av = (av << KEYS_AVERAGES_MIX_SHIFT) - av + acc;
499 av >>= KEYS_AVERAGES_MIX_SHIFT;
501 keys_averages[i] = av;
502 keys_averages_acc[i] = 0;
505 keys_averages_acc_count = 0;
507 if(boot_count >= WARMUP_LOOPS) {
511 sampleColumn(0x0); // to resync us if we dumped a mess 'o text.
517 // Return non-zero if macro and USB processing should be delayed
518 // Macro processing will always run if returning 0
519 // USB processing only happens once the USB send timer expires, if it has not, scan_loop will be called
520 // after the macro processing has been completed
526 void scan_resetKeyboard( void )
528 // Empty buffer, now that keyboard has been reset
529 KeyIndex_BufferUsed = 0;
533 // Send data to keyboard
534 // NOTE: Only used for converters, since the scan module shouldn't handle sending data in a controller
535 uint8_t scan_sendData( uint8_t dataPayload )
541 // Reset/Hold keyboard
542 // NOTE: Only used for converters, not needed for full controllers
543 void scan_lockKeyboard( void )
547 // NOTE: Only used for converters, not needed for full controllers
548 void scan_unlockKeyboard( void )
553 // Signal KeyIndex_Buffer that it has been properly read
554 // NOTE: Only really required for implementing "tricks" in converters for odd protocols
555 void scan_finishedWithBuffer( uint8_t sentKeys )
557 // Convenient place to clear the KeyIndex_Buffer
558 KeyIndex_BufferUsed = 0;
563 // Signal KeyIndex_Buffer that it has been properly read and sent out by the USB module
564 // NOTE: Only really required for implementing "tricks" in converters for odd protocols
565 void scan_finishedWithUSBBuffer( uint8_t sentKeys )
571 void _delay_loop(uint8_t __count)
582 void setup_ADC (void) {
583 // disable adc digital pins.
584 DIDR1 |= (1 << AIN0D) | (1<<AIN1D); // set disable on pins 1,0.
585 //DIDR0 = 0xff; // disable all. (port F, usually). - testing w/o disable.
588 uint8_t mux = 0 & 0x1f; // 0 == first. // 0x1e = 1.1V ref.
590 // 0 = external aref 1,1 = 2.56V internal ref
591 uint8_t aref = ((1 << REFS1) | (1 << REFS0)) & ((1 << REFS1) | (1 << REFS0));
592 // uint8_t adlar = 0xff & (1 << ADLAR); // 1 := left justify bits, 0 := right
593 uint8_t adate = (1 << ADATE) & (1 << ADATE); // trigger enable
594 uint8_t trig = 0 & ((1 << ADTS0) | (1 << ADTS1) | (1 << ADTS2)); // 0 = free running
595 // ps2, ps1 := /64 ( 2^6 ) ps2 := /16 (2^4), ps1 := 4, ps0 :=2, PS1,PS0 := 8 (2^8)
596 uint8_t prescale = ( ((PRESCALE) << PRESCALE_SHIFT) & PRESCALE_MASK ); // 001 == 2^1 == 2
597 uint8_t hispeed = (1 << ADHSM);
598 uint8_t en_mux = (1 << ACME);
600 //ADCSRA = (ADCSRA & ~PRESCALES) | ((1 << ADPS1) | (1 << ADPS2)); // 2, 1 := /64 ( 2^6 )
601 //ADCSRA = (ADCSRA & ~PRESCALES) | ((1 << ADPS0) | (1 << ADPS2)); // 2, 0 := /32 ( 2^5 )
602 //ADCSRA = (ADCSRA & ~PRESCALES) | ((1 << ADPS2)); // 2 := /16 ( 2^4 )
604 ADCSRA = (1 << ADEN) | prescale; // ADC enable
607 //ADMUX |= ((1 << REFS1) | (1 << REFS0)); // 2.56 V internal.
608 //ADMUX |= ((1 << REFS0) ); // Vcc with external cap.
609 //ADMUX &= ~((1 << REFS1) | (1 << REFS0)); // 0,0 : aref.
610 ADMUX = aref | mux | ADLAR_BITS;
613 // ADCSRB |= (1 << ACME); // enable
614 // ADCSRB &= ~(1 << ADEN); // ?
617 //ADMUX = (ADMUX & ~MUXES); // start at 000 = ADC0
619 // clear adlar to left justify data
622 // set adlar to right justify data
623 //ADMUX |= (1 << ADLAR);
627 ADCSRA |= adate; // trigger enable
628 ADCSRB = en_mux | hispeed | trig | (ADCSRB & ~((1 << ADTS0) | (1 << ADTS1) | (1 << ADTS2))); // trigger select free running
630 // ADCSRA |= (1 << ADATE); // tiggger enable
632 ADCSRA |= (1 << ADEN); // ADC enable
633 ADCSRA |= (1 << ADSC); // start conversions q
637 void recovery(uint8_t on) {
638 DDRB |= (1 << RECOVERY_CONTROL);
640 PORTB &= ~(1 << RECOVERY_SINK); // SINK always zero
641 DDRB &= ~(1 << RECOVERY_SOURCE); // SOURCE high imp
644 // set strobes to sink to gnd.
653 DDRB |= (1 << RECOVERY_SINK); // SINK pull
655 PORTB |= (1 << RECOVERY_CONTROL);
657 PORTB |= (1 << RECOVERY_SOURCE); // SOURCE high
658 DDRB |= (1 << RECOVERY_SOURCE);
661 PORTB &= ~(1 << RECOVERY_CONTROL);
663 DDRB &= ~(1 << RECOVERY_SOURCE);
664 PORTB &= ~(1 << RECOVERY_SOURCE); // SOURCE low
665 DDRB &= ~(1 << RECOVERY_SINK); // SINK high-imp
667 //DDRB &= ~(1 << RECOVERY_SINK);
672 void hold_sample(uint8_t on) {
674 PORTB |= (1 << SAMPLE_CONTROL);
675 DDRB |= (1 << SAMPLE_CONTROL);
677 DDRB |= (1 << SAMPLE_CONTROL);
678 PORTB &= ~(1 << SAMPLE_CONTROL);
683 void strobe_w(uint8_t strobe_num) {
690 //strobe_num = 15 - strobe_num;
693 printHex( strobe_num );
695 strobe_num = 9 - strobe_num;
696 printHex( strobe_num );
702 // XXX Kishsaver strobe (note that D0, D1 are not used)
703 case 0: PORTD |= (1 << 0); break;
704 case 1: PORTD |= (1 << 1); break;
705 case 2: PORTD |= (1 << 2); break;
706 case 3: PORTD |= (1 << 3); break;
707 case 4: PORTD |= (1 << 4); break;
708 case 5: PORTD |= (1 << 5); break;
711 case 6: PORTD |= (1 << 6); break;
712 case 7: PORTD |= (1 << 7); break;
713 case 8: PORTE |= (1 << 0); break;
714 case 9: PORTE |= (1 << 1); break;
715 //case 15: PORTC |= (1 << 5); break; // Test strobe on kishsaver
718 // XXX Kishsaver strobe (note that D0, D1 are not used)
719 case 0: PORTD |= (1 << 2); break;
720 case 1: PORTD |= (1 << 3); break;
721 case 2: PORTD |= (1 << 4); break;
722 case 3: PORTD |= (1 << 5); break;
725 case 4: PORTD |= (1 << 6); break;
726 case 5: PORTD |= (1 << 7); break;
727 case 6: PORTE |= (1 << 0); break;
728 case 7: PORTE |= (1 << 1); break;
729 case 15: PORTC |= (1 << 5); break; // Test strobe on kishsaver
734 case 6: PORTD |= (1 << 6); break;
735 case 7: PORTD |= (1 << 7); break;
737 case 8: PORTC |= (1 << 0); break;
738 case 9: PORTC |= (1 << 1); break;
739 case 10: PORTC |= (1 << 2); break;
740 case 11: PORTC |= (1 << 3); break;
741 case 12: PORTC |= (1 << 4); break;
742 case 13: PORTC |= (1 << 5); break;
743 case 14: PORTC |= (1 << 6); break;
744 case 15: PORTC |= (1 << 7); break;
746 case 16: PORTE |= (1 << 0); break;
747 case 17: PORTE |= (1 << 1); break;
752 case 6: PORTE |= (1 << 0); break;
753 case 7: PORTE |= (1 << 1); break;
755 case 8: PORTC |= (1 << 0); break;
756 case 9: PORTC |= (1 << 1); break;
757 case 10: PORTC |= (1 << 2); break;
758 case 11: PORTC |= (1 << 3); break;
759 case 12: PORTC |= (1 << 4); break;
760 case 13: PORTC |= (1 << 5); break;
761 case 14: PORTC |= (1 << 6); break;
762 case 15: PORTC |= (1 << 7); break;
767 case 6: PORTD |= (1 << 6); break;
768 case 7: PORTD |= (1 << 7); break;
770 case 8: PORTE |= (1 << 0); break;
771 case 9: PORTE |= (1 << 1); break;
773 case 10: PORTC |= (1 << 0); break;
774 case 11: PORTC |= (1 << 1); break;
775 case 12: PORTC |= (1 << 2); break;
776 case 13: PORTC |= (1 << 3); break;
777 case 14: PORTC |= (1 << 4); break;
778 case 15: PORTC |= (1 << 5); break;
780 case 16: PORTC |= (1 << 6); break;
781 case 17: PORTC |= (1 << 7); break;
793 #if 0 // New code from dfj -> still needs redoing for kishsaver and autodetection of strobes
795 strobe_num = 15 - strobe_num;
798 #ifdef SINGLE_COLUMN_TEST
804 case 0: PORTD |= (1 << 0); DDRD &= ~(1 << 0); break;
805 case 1: PORTD |= (1 << 1); DDRD &= ~(1 << 1); break;
806 case 2: PORTD |= (1 << 2); DDRD &= ~(1 << 2); break;
807 case 3: PORTD |= (1 << 3); DDRD &= ~(1 << 3); break;
808 case 4: PORTD |= (1 << 4); DDRD &= ~(1 << 4); break;
809 case 5: PORTD |= (1 << 5); DDRD &= ~(1 << 5); break;
813 case 6: PORTD |= (1 << 6); break;
814 case 7: PORTD |= (1 << 7); break;
816 case 8: PORTC |= (1 << 0); break;
817 case 9: PORTC |= (1 << 1); break;
818 case 10: PORTC |= (1 << 2); break;
819 case 11: PORTC |= (1 << 3); break;
820 case 12: PORTC |= (1 << 4); break;
821 case 13: PORTC |= (1 << 5); break;
822 case 14: PORTC |= (1 << 6); break;
823 case 15: PORTC |= (1 << 7); break;
825 case 16: PORTE |= (1 << 0); break;
826 case 17: PORTE |= (1 << 1); break;
831 case 6: PORTE |= (1 << 0); break;
832 case 7: PORTE |= (1 << 1); break;
834 case 8: PORTC |= (1 << 0); break;
835 case 9: PORTC |= (1 << 1); break;
836 case 10: PORTC |= (1 << 2); break;
837 case 11: PORTC |= (1 << 3); break;
838 case 12: PORTC |= (1 << 4); break;
839 case 13: PORTC |= (1 << 5); break;
840 case 14: PORTC |= (1 << 6); break;
841 case 15: PORTC |= (1 << 7); break;
846 case 6: PORTD |= (1 << 6); DDRD &= ~(1 << 6); break;
847 case 7: PORTD |= (1 << 7); DDRD &= ~(1 << 7); break;
849 case 8: PORTE |= (1 << 0); DDRE &= ~(1 << 0); break;
850 case 9: PORTE |= (1 << 1); DDRE &= ~(1 << 1); break;
852 case 10: PORTC |= (1 << 0); DDRC &= ~(1 << 0); break;
853 case 11: PORTC |= (1 << 1); DDRC &= ~(1 << 1); break;
854 case 12: PORTC |= (1 << 2); DDRC &= ~(1 << 2); break;
855 case 13: PORTC |= (1 << 3); DDRC &= ~(1 << 3); break;
856 case 14: PORTC |= (1 << 4); DDRC &= ~(1 << 4); break;
857 case 15: PORTC |= (1 << 5); DDRC &= ~(1 << 5); break;
859 case 16: PORTC |= (1 << 6); DDRC &= ~(1 << 6); break;
860 case 17: PORTC |= (1 << 7); DDRC &= ~(1 << 7); break;
876 inline uint16_t getADC() {
877 ADCSRA |= (1 << ADIF); // clear int flag by writing 1.
878 //wait for last read to complete.
879 while (! (ADCSRA & (1 << ADIF)));
880 return ADC; // return sample
884 int sampleColumn_8x(uint8_t column, uint16_t * buffer) {
885 // ensure all probe lines are driven low, and chill for recovery delay.
888 ADCSRA |= (1 << ADEN) | (1 << ADSC); // enable and start conversions
890 // sync up with adc clock:
905 for(uint8_t i=0; i < STROBE_SETTLE; ++i) {
913 for(uint8_t mux=0; mux < 8; ++mux) {
915 SET_FULL_MUX(mux); // our sample will use this
916 // wait for mux to settle.
917 for(uint8_t i=0; i < MUX_SETTLE; ++i) {
922 // retrieve current read.
923 buffer[mux] = getADC();// - OFFSET_VOLTAGE;
929 sample = getADC(); // throw away; unknown mux.
931 SET_FULL_MUX(mux + 1); // our *next* sample will use this
933 // retrieve current read.
934 buffer[mux] = getADC();// - OFFSET_VOLTAGE;
944 ADCSRA &= ~(1 << ADEN);
946 // pull all columns' strobe-lines low.
959 int sampleColumn(uint8_t column) {
962 rval = sampleColumn_8x(column, samples+SAMPLE_OFFSET);
965 for(uint8_t i=0; i<8; ++i) {
966 if(samples[SAMPLE_OFFSET + i] - adc_mux_averages[i] > BUMP_THRESHOLD) {
969 _delay_us(BUMP_REST_US);
972 error_data = samples[SAMPLE_OFFSET +i]; // | ((uint16_t)i << 8);
982 uint8_t testColumn(uint8_t strobe)
986 for (uint8_t i = 0; i < MUXES_COUNT; ++i)
988 uint16_t delta = keys_averages[(strobe << MUXES_COUNT_XSHIFT) + i];
990 if ((db_sample = samples[SAMPLE_OFFSET + i] >> 1) > (db_threshold = threshold) + (db_delta = delta))
995 #ifdef THRESHOLD_VERIFICATION
996 if ( db_sample > 0xA0 )
998 printHex( db_sample );
1000 printHex( db_threshold );
1002 printHex( db_delta );
1017 void dumpkeys(void) {
1021 if (count >= WARMUP_LOOPS && error) {
1027 for (uint8_t i=0; i < STROBE_LINES; ++i) {
1028 printHex(usb_keymap[i]);
1036 printHex(error_data);
1041 // XXX Will be cleaned up eventually, but this will do for now :P -HaaTa
1042 for (uint8_t i=0; i < STROBE_LINES; ++i) {
1043 for(uint8_t j=0; j<MUXES_COUNT; ++j) {
1044 if ( usb_keymap[i] & (1 << j) ) {
1045 uint8_t key = (i << MUXES_COUNT_XSHIFT) + j;
1047 // Add to the Macro processing buffer
1048 // Automatically handles converting to a USB code and sending off to the PC
1059 //if(usb_dirty) print("\n");
1060 usb_keyboard_send();
1066 //#define DEBUG_FULL_SAMPLES_AVERAGES
1067 #ifdef DEBUG_FULL_SAMPLES_AVERAGES
1068 if(!dump_count) { // we don't want to debug-out during the measurements.
1070 // Averages currently set per key
1071 for(int i =0; i< KEY_COUNT; ++i) {
1074 } else if (!(i & 0x07)) {
1078 printHex (keys_averages[i]);
1083 // Previously read full ADC scans?
1084 for(int i =0; i< KEY_COUNT; ++i) {
1087 } else if (!(i & 0x07)) {
1091 printHex(full_samples[i]);
1096 #ifdef DEBUG_STROBE_SAMPLES_AVERAGES
1097 // Per strobe information
1098 uint8_t cur_strober = ze_strober;
1101 printHex(cur_strober);
1103 // Previously read ADC scans on current strobe
1105 for (uint8_t i=0; i < MUXES_COUNT; ++i) {
1107 printHex(full_samples[(cur_strober << MUXES_COUNT_XSHIFT) + i]);
1110 // Averages current set on current strobe
1113 for (uint8_t i=0; i < MUXES_COUNT; ++i) {
1115 printHex(keys_averages[(cur_strober << MUXES_COUNT_XSHIFT) + i]);
1120 //#define DEBUG_DELTA_SAMPLE_THRESHOLD
1121 #ifdef DEBUG_DELTA_SAMPLE_THRESHOLD
1123 //uint16_t db_delta = 0;
1124 //uint16_t db_sample = 0;
1125 //uint16_t db_threshold = 0;
1126 printHex( db_delta );
1128 printHex( db_sample );
1130 printHex( db_threshold );
1135 //#define DEBUG_USB_KEYMAP
1136 #ifdef DEBUG_USB_KEYMAP
1139 // Current keymap values
1140 for (uint8_t i=0; i < STROBE_LINES; ++i) {
1141 printHex(cur_keymap[i]);