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 0x95
128 #define KEY_COUNT ((STROBE_LINES) * (MUXES_COUNT))
133 #define RECOVERY_CONTROL 1
135 #define RECOVERY_SOURCE 0
136 #define RECOVERY_SINK 2
137 #define RECOVERY_MASK 0x03
143 // mix in 1/4 of the current average to the running average. -> (@mux_mix = 2)
147 #define IDLE_COUNT_MASK 0xff
148 #define IDLE_COUNT_MAX (IDLE_COUNT_MASK + 1)
149 #define IDLE_COUNT_SHIFT 8
151 #define KEYS_AVERAGES_MIX 2
156 #define D_MASK (0xff)
159 #define E_MASK (0x00)
162 #define C_MASK (0xff)
168 #define D_MASK (0x3f)
171 #define E_MASK (0x03)
174 #define C_MASK (0xff)
180 #define D_MASK (0xff)
183 #define E_MASK (0x03)
186 #define C_MASK (0xff)
196 // ----- Macros -----
198 // Make sure we haven't overflowed the buffer
199 #define bufferAdd(byte) \
200 if ( KeyIndex_BufferUsed < KEYBOARD_BUFFER ) \
201 KeyIndex_Buffer[KeyIndex_BufferUsed++] = byte
204 // TODO dfj macros...needs cleaning up and commenting...
205 #define STROBE_CASE(SC_CASE, SC_REG_A) case (SC_CASE): PORT##SC_REG_A = \
206 (( (PORT##SC_REG_A) & ~(1 << (SC_CASE - SC_REG_A##_SHIFT)) ) | (1 << (SC_CASE - SC_REG_A##_SHIFT)))
208 #define SET_MUX(X) ((ADMUX) = (((ADMUX) & ~(MUX_MASK)) | ((X) & (MUX_MASK))))
209 #define SET_FULL_MUX(X) ((ADMUX) = (((ADMUX) & ~(FULL_MUX_MASK)) | ((X) & (FULL_MUX_MASK))))
215 // ----- Variables -----
217 // Buffer used to inform the macro processing module which keys have been detected as pressed
218 volatile uint8_t KeyIndex_Buffer[KEYBOARD_BUFFER];
219 volatile uint8_t KeyIndex_BufferUsed;
222 // TODO dfj variables...needs cleaning up and commenting
224 volatile uint16_t full_av = 0;
226 /**/ uint8_t ze_strober = 0;
228 uint16_t samples [SAMPLES];
230 //int16_t gsamples [SAMPLES];
232 int16_t adc_mux_averages[MUXES_COUNT];
233 int16_t adc_strobe_averages[STROBE_LINES];
236 uint8_t cur_keymap[STROBE_LINES];
237 // /**/ int8_t last_keymap[STROBE_LINES];
238 uint8_t usb_keymap[STROBE_LINES];
239 uint16_t keys_down=0;
245 uint16_t threshold = THRESHOLD;
255 uint16_t keys_averages_acc[KEY_COUNT];
256 uint16_t keys_averages[KEY_COUNT];
257 uint16_t keys_averages_acc_count=0;
259 uint8_t full_samples[KEY_COUNT];
262 // #define COUNT_MASK 0x9fff
263 // #define COUNT_HIGH_BIT (INT16_MIN)
264 // TODO: change this to 'booting', then count down.
265 uint16_t boot_count = 0;
267 uint16_t idle_count=0;
270 /*volatile*/ uint16_t count = 0;
272 /*volatile*/ uint8_t error = 0;
273 uint16_t error_data = 0;
276 int16_t mux_averages[MUXES_COUNT];
277 int16_t strobe_averages[STROBE_LINES];
279 uint8_t dump_count = 0;
283 uint16_t db_delta = 0;
284 uint8_t db_sample = 0;
285 uint16_t db_threshold = 0;
289 // ----- Function Declarations -----
292 void dumpkeys( void );
294 void recovery( uint8_t on );
296 int sampleColumn ( uint8_t column );
297 //int sampleColumn_i( uint8_t column, uint8_t muxes, int16_t * buffer); // XXX Not currently used
298 int sampleColumn_k( uint8_t column, int16_t *buffer );
300 void setup_ADC( void );
302 void strobe_w( uint8_t strobe_num );
304 uint8_t testColumn( uint8_t strobe );
308 // ----- Functions -----
310 // Initial setup for cap sense controller
311 inline void scan_setup()
313 // TODO dfj code...needs cleanup + commenting...
316 // Configure timer 0 to generate a timer overflow interrupt every
317 // 256*1024 clock cycles, or approx 61 Hz when using 16 MHz clock
318 // This demonstrates how to use interrupts to implement a simple
319 // inactivity timeout.
322 //TIMSK0 = (1<<TOIE0);
334 //uint16_t strobe = 1;
337 // TODO all this code should probably be in scan_resetKeyboard
338 for (int i=0; i< STROBE_LINES; ++i) {
340 //last_keymap[i] = 0;
344 for(int i=0; i < MUXES_COUNT; ++i) {
345 adc_mux_averages[i] = 0x20; // experimentally determined.
347 for(int i=0; i < STROBE_LINES; ++i) {
348 adc_strobe_averages[i] = 0x20; // yup.
351 for(int i=0; i< KEY_COUNT; ++i) {
352 keys_averages[i] = DEFAULT_KEY_BASE;
353 keys_averages_acc[i] = (DEFAULT_KEY_BASE);
356 /** warm things up a bit before we start collecting data, taking real samples. */
357 for(uint8_t i = 0; i< STROBE_LINES; ++i) {
362 // Reset the keyboard before scanning, we might be in a wierd state
363 // Also sets the KeyIndex_BufferUsed to 0
364 scan_resetKeyboard();
368 // Main Detection Loop
369 // This is where the important stuff happens
370 inline uint8_t scan_loop()
372 // TODO dfj code...needs commenting + cleanup...
374 uint32_t full_av_acc = 0;
376 for (strober = 0; strober < STROBE_LINES; ++strober) {
380 while (tries++ && sampleColumn(strober)) { tries &= 0x7; } // don't waste this one just because the last one was poop.
381 column = testColumn(strober);
382 idle |= column; // if column has any pressed keys, then we are not idle.
384 if( column != cur_keymap[strober] && (count >= WARMUP_LOOPS) ) {
389 while (tries++ && sampleColumn(strober)) { tries &= 0x7; }
390 col_a = testColumn(strober);
393 while (tries++ && sampleColumn(strober)) { tries &= 0x7; }
394 col_b = testColumn(strober);
397 while (tries++ && sampleColumn(strober)) { tries &= 0x7; }
398 col_c = testColumn(strober);
400 if( (col_a == col_b) && (col_b == col_c) && (cur_keymap[strober] != col_a) ) {
401 cur_keymap[strober] = col_a;
405 cur_keymap[strober] = column;
410 idle |= usb_dirty; // if any keys have changed inc. released, then we are not idle.
413 error_data |= (((uint16_t)strober) << 12);
416 uint8_t strobe_line = strober << MUXES_COUNT_XSHIFT;
417 for(int i=0; i<MUXES_COUNT; ++i) {
418 // discard sketchy low bit, and meaningless high bits.
419 uint8_t sample = samples[SAMPLE_OFFSET + i] >> 1;
420 full_samples[strobe_line + i] = sample;
421 keys_averages_acc[strobe_line + i] += sample;
423 keys_averages_acc_count++;
425 strobe_averages[strober] = 0;
426 for (uint8_t i = SAMPLE_OFFSET; i < (SAMPLE_OFFSET + MUXES_COUNT); ++i) {
427 //samples[i] -= samples[i-SAMPLE_OFFSET]; // av; // + full_av); // -something.
428 //samples[i] -= OFFSET_VOLTAGE; // moved to sampleColumn.
430 full_av_acc += (samples[i]);
431 #ifdef COLLECT_STROBE_AVERAGES
432 mux_averages[i - SAMPLE_OFFSET] += samples[i];
433 strobe_averages[strober] += samples[i];
435 //samples[i] -= (full_av - HYST_T);
440 #ifdef COLLECT_STROBE_AVERAGES
441 adc_strobe_averages[strober] += strobe_averages[strober] >> 3;
442 adc_strobe_averages[strober] >>= 1;
444 /** test if we went negative. */
445 if ((adc_strobe_averages[strober] & 0xFF00) && (boot_count
447 error = 0xf; error_data = adc_strobe_averages[strober];
452 #ifdef VERIFY_TEST_PAD
453 // verify test key is not down.
454 if((cur_keymap[TEST_KEY_STROBE] & TEST_KEY_MASK) ) {
457 error_data = cur_keymap[TEST_KEY_STROBE] << 8;
458 error_data += full_samples[TEST_KEY_STROBE * 8];
463 #ifdef COLLECT_STROBE_AVERAGES
464 // calc mux averages.
465 if (boot_count < WARMUP_LOOPS) {
466 full_av += (full_av_acc >> (7));
468 //full_av = full_av_acc / count;
471 for (int i=0; i < MUXES_COUNT; ++i) {
472 #define MUX_MIX 2 // mix in 1/4 of the current average to the running average. -> (@mux_mix = 2)
473 adc_mux_averages[i] = (adc_mux_averages[i] << MUX_MIX) - adc_mux_averages[i];
474 adc_mux_averages[i] += (mux_averages[i] >> 4);
475 adc_mux_averages[i] >>= MUX_MIX;
482 // av = (av << shift) - av + sample; av >>= shift
483 // e.g. 1 -> (av + sample) / 2 simple average of new and old
484 // 2 -> (3 * av + sample) / 4 i.e. 3:1 mix of old to new.
485 // 3 -> (7 * av + sample) / 8 i.e. 7:1 mix of old to new.
486 #define KEYS_AVERAGES_MIX_SHIFT 3
488 /** aggregate if booting, or if idle;
489 * else, if not booting, check for dirty USB.
493 idle_count &= IDLE_COUNT_MASK;
495 idle = idle && !keys_down;
497 if (boot_count < WARMUP_LOOPS) {
499 error_data = boot_count;
501 } else { // count >= WARMUP_LOOPS
503 for (int i=0; i<STROBE_LINES; ++i) {
504 usb_keymap[i] = cur_keymap[i];
509 memset(((void *)keys_averages_acc), 0, (size_t)(KEY_COUNT * sizeof (uint16_t)));
510 keys_averages_acc_count = 0;
519 for (uint8_t i = 0; i < KEY_COUNT; ++i) {
520 uint16_t acc = keys_averages_acc[i] >> IDLE_COUNT_SHIFT;
521 uint32_t av = keys_averages[i];
523 av = (av << KEYS_AVERAGES_MIX_SHIFT) - av + acc;
524 av >>= KEYS_AVERAGES_MIX_SHIFT;
526 keys_averages[i] = av;
527 keys_averages_acc[i] = 0;
530 keys_averages_acc_count = 0;
532 if(boot_count >= WARMUP_LOOPS) {
536 sampleColumn(0x0); // to resync us if we dumped a mess 'o text.
542 // Return non-zero if macro and USB processing should be delayed
543 // Macro processing will always run if returning 0
544 // USB processing only happens once the USB send timer expires, if it has not, scan_loop will be called
545 // after the macro processing has been completed
551 void scan_resetKeyboard( void )
553 // Empty buffer, now that keyboard has been reset
554 KeyIndex_BufferUsed = 0;
558 // Send data to keyboard
559 // NOTE: Only used for converters, since the scan module shouldn't handle sending data in a controller
560 uint8_t scan_sendData( uint8_t dataPayload )
566 // Reset/Hold keyboard
567 // NOTE: Only used for converters, not needed for full controllers
568 void scan_lockKeyboard( void )
572 // NOTE: Only used for converters, not needed for full controllers
573 void scan_unlockKeyboard( void )
578 // Signal KeyIndex_Buffer that it has been properly read
579 // NOTE: Only really required for implementing "tricks" in converters for odd protocols
580 void scan_finishedWithBuffer( uint8_t sentKeys )
582 // Convenient place to clear the KeyIndex_Buffer
583 KeyIndex_BufferUsed = 0;
588 // Signal KeyIndex_Buffer that it has been properly read and sent out by the USB module
589 // NOTE: Only really required for implementing "tricks" in converters for odd protocols
590 void scan_finishedWithUSBBuffer( uint8_t sentKeys )
596 void _delay_loop(uint8_t __count)
607 void setup_ADC (void) {
608 // disable adc digital pins.
609 DIDR1 |= (1 << AIN0D) | (1<<AIN1D); // set disable on pins 1,0.
610 //DIDR0 = 0xff; // disable all. (port F, usually). - testing w/o disable.
613 uint8_t mux = 0 & 0x1f; // 0 == first. // 0x1e = 1.1V ref.
615 // 0 = external aref 1,1 = 2.56V internal ref
616 uint8_t aref = ((1 << REFS1) | (1 << REFS0)) & ((1 << REFS1) | (1 << REFS0));
617 // uint8_t adlar = 0xff & (1 << ADLAR); // 1 := left justify bits, 0 := right
618 uint8_t adate = (1 << ADATE) & (1 << ADATE); // trigger enable
619 uint8_t trig = 0 & ((1 << ADTS0) | (1 << ADTS1) | (1 << ADTS2)); // 0 = free running
620 // ps2, ps1 := /64 ( 2^6 ) ps2 := /16 (2^4), ps1 := 4, ps0 :=2, PS1,PS0 := 8 (2^8)
621 uint8_t prescale = ( ((PRESCALE) << PRESCALE_SHIFT) & PRESCALE_MASK ); // 001 == 2^1 == 2
622 uint8_t hispeed = (1 << ADHSM);
623 uint8_t en_mux = (1 << ACME);
625 //ADCSRA = (ADCSRA & ~PRESCALES) | ((1 << ADPS1) | (1 << ADPS2)); // 2, 1 := /64 ( 2^6 )
626 //ADCSRA = (ADCSRA & ~PRESCALES) | ((1 << ADPS0) | (1 << ADPS2)); // 2, 0 := /32 ( 2^5 )
627 //ADCSRA = (ADCSRA & ~PRESCALES) | ((1 << ADPS2)); // 2 := /16 ( 2^4 )
629 ADCSRA = (1 << ADEN) | prescale; // ADC enable
632 //ADMUX |= ((1 << REFS1) | (1 << REFS0)); // 2.56 V internal.
633 //ADMUX |= ((1 << REFS0) ); // Vcc with external cap.
634 //ADMUX &= ~((1 << REFS1) | (1 << REFS0)); // 0,0 : aref.
635 ADMUX = aref | mux | ADLAR_BITS;
638 // ADCSRB |= (1 << ACME); // enable
639 // ADCSRB &= ~(1 << ADEN); // ?
642 //ADMUX = (ADMUX & ~MUXES); // start at 000 = ADC0
644 // clear adlar to left justify data
647 // set adlar to right justify data
648 //ADMUX |= (1 << ADLAR);
652 ADCSRA |= adate; // trigger enable
653 ADCSRB = en_mux | hispeed | trig | (ADCSRB & ~((1 << ADTS0) | (1 << ADTS1) | (1 << ADTS2))); // trigger select free running
655 // ADCSRA |= (1 << ADATE); // tiggger enable
657 ADCSRA |= (1 << ADEN); // ADC enable
658 ADCSRA |= (1 << ADSC); // start conversions q
662 void recovery(uint8_t on) {
663 DDRB |= (1 << RECOVERY_CONTROL);
665 PORTB &= ~(1 << RECOVERY_SINK); // SINK always zero
666 DDRB &= ~(1 << RECOVERY_SOURCE); // SOURCE high imp
669 // set strobes to sink to gnd.
678 DDRB |= (1 << RECOVERY_SINK); // SINK pull
680 PORTB |= (1 << RECOVERY_CONTROL);
682 PORTB |= (1 << RECOVERY_SOURCE); // SOURCE high
683 DDRB |= (1 << RECOVERY_SOURCE);
686 PORTB &= ~(1 << RECOVERY_CONTROL);
688 DDRB &= ~(1 << RECOVERY_SOURCE);
689 PORTB &= ~(1 << RECOVERY_SOURCE); // SOURCE low
690 DDRB &= ~(1 << RECOVERY_SINK); // SINK high-imp
692 //DDRB &= ~(1 << RECOVERY_SINK);
697 void hold_sample(uint8_t on) {
699 PORTB |= (1 << SAMPLE_CONTROL);
700 DDRB |= (1 << SAMPLE_CONTROL);
702 DDRB |= (1 << SAMPLE_CONTROL);
703 PORTB &= ~(1 << SAMPLE_CONTROL);
708 void strobe_w(uint8_t strobe_num) {
715 strobe_num = 15 - strobe_num;
718 printHex( strobe_num );
720 strobe_num = 9 - strobe_num;
721 printHex( strobe_num );
727 // XXX Kishsaver strobe (note that D0, D1 are not used)
728 case 2: PORTD |= (1 << 2); break;
729 case 3: PORTD |= (1 << 3); break;
730 case 4: PORTD |= (1 << 4); break;
731 case 5: PORTD |= (1 << 5); break;
734 case 6: PORTD |= (1 << 6); break;
735 case 7: PORTD |= (1 << 7); break;
736 case 8: PORTE |= (1 << 0); break;
737 case 9: PORTE |= (1 << 1); break;
738 case 15: PORTC |= (1 << 5); break;
742 case 6: PORTD |= (1 << 6); break;
743 case 7: PORTD |= (1 << 7); break;
745 case 8: PORTC |= (1 << 0); break;
746 case 9: PORTC |= (1 << 1); break;
747 case 10: PORTC |= (1 << 2); break;
748 case 11: PORTC |= (1 << 3); break;
749 case 12: PORTC |= (1 << 4); break;
750 case 13: PORTC |= (1 << 5); break;
751 case 14: PORTC |= (1 << 6); break;
752 case 15: PORTC |= (1 << 7); break;
754 case 16: PORTE |= (1 << 0); break;
755 case 17: PORTE |= (1 << 1); break;
760 case 6: PORTE |= (1 << 0); break;
761 case 7: PORTE |= (1 << 1); break;
763 case 8: PORTC |= (1 << 0); break;
764 case 9: PORTC |= (1 << 1); break;
765 case 10: PORTC |= (1 << 2); break;
766 case 11: PORTC |= (1 << 3); break;
767 case 12: PORTC |= (1 << 4); break;
768 case 13: PORTC |= (1 << 5); break;
769 case 14: PORTC |= (1 << 6); break;
770 case 15: PORTC |= (1 << 7); break;
775 case 6: PORTD |= (1 << 6); break;
776 case 7: PORTD |= (1 << 7); break;
778 case 8: PORTE |= (1 << 0); break;
779 case 9: PORTE |= (1 << 1); break;
781 case 10: PORTC |= (1 << 0); break;
782 case 11: PORTC |= (1 << 1); break;
783 case 12: PORTC |= (1 << 2); break;
784 case 13: PORTC |= (1 << 3); break;
785 case 14: PORTC |= (1 << 4); break;
786 case 15: PORTC |= (1 << 5); break;
788 case 16: PORTC |= (1 << 6); break;
789 case 17: PORTC |= (1 << 7); break;
801 #if 0 // New code from dfj -> still needs redoing for kishsaver and autodetection of strobes
803 strobe_num = 15 - strobe_num;
806 #ifdef SINGLE_COLUMN_TEST
812 case 0: PORTD |= (1 << 0); DDRD &= ~(1 << 0); break;
813 case 1: PORTD |= (1 << 1); DDRD &= ~(1 << 1); break;
814 case 2: PORTD |= (1 << 2); DDRD &= ~(1 << 2); break;
815 case 3: PORTD |= (1 << 3); DDRD &= ~(1 << 3); break;
816 case 4: PORTD |= (1 << 4); DDRD &= ~(1 << 4); break;
817 case 5: PORTD |= (1 << 5); DDRD &= ~(1 << 5); break;
821 case 6: PORTD |= (1 << 6); break;
822 case 7: PORTD |= (1 << 7); break;
824 case 8: PORTC |= (1 << 0); break;
825 case 9: PORTC |= (1 << 1); break;
826 case 10: PORTC |= (1 << 2); break;
827 case 11: PORTC |= (1 << 3); break;
828 case 12: PORTC |= (1 << 4); break;
829 case 13: PORTC |= (1 << 5); break;
830 case 14: PORTC |= (1 << 6); break;
831 case 15: PORTC |= (1 << 7); break;
833 case 16: PORTE |= (1 << 0); break;
834 case 17: PORTE |= (1 << 1); break;
839 case 6: PORTE |= (1 << 0); break;
840 case 7: PORTE |= (1 << 1); break;
842 case 8: PORTC |= (1 << 0); break;
843 case 9: PORTC |= (1 << 1); break;
844 case 10: PORTC |= (1 << 2); break;
845 case 11: PORTC |= (1 << 3); break;
846 case 12: PORTC |= (1 << 4); break;
847 case 13: PORTC |= (1 << 5); break;
848 case 14: PORTC |= (1 << 6); break;
849 case 15: PORTC |= (1 << 7); break;
854 case 6: PORTD |= (1 << 6); DDRD &= ~(1 << 6); break;
855 case 7: PORTD |= (1 << 7); DDRD &= ~(1 << 7); break;
857 case 8: PORTE |= (1 << 0); DDRE &= ~(1 << 0); break;
858 case 9: PORTE |= (1 << 1); DDRE &= ~(1 << 1); break;
860 case 10: PORTC |= (1 << 0); DDRC &= ~(1 << 0); break;
861 case 11: PORTC |= (1 << 1); DDRC &= ~(1 << 1); break;
862 case 12: PORTC |= (1 << 2); DDRC &= ~(1 << 2); break;
863 case 13: PORTC |= (1 << 3); DDRC &= ~(1 << 3); break;
864 case 14: PORTC |= (1 << 4); DDRC &= ~(1 << 4); break;
865 case 15: PORTC |= (1 << 5); DDRC &= ~(1 << 5); break;
867 case 16: PORTC |= (1 << 6); DDRC &= ~(1 << 6); break;
868 case 17: PORTC |= (1 << 7); DDRC &= ~(1 << 7); break;
884 inline uint16_t getADC() {
885 ADCSRA |= (1 << ADIF); // clear int flag by writing 1.
886 //wait for last read to complete.
887 while (! (ADCSRA & (1 << ADIF)));
888 return ADC; // return sample
892 int sampleColumn_8x(uint8_t column, uint16_t * buffer) {
893 // ensure all probe lines are driven low, and chill for recovery delay.
896 ADCSRA |= (1 << ADEN) | (1 << ADSC); // enable and start conversions
898 // sync up with adc clock:
913 for(uint8_t i=0; i < STROBE_SETTLE; ++i) {
921 for(uint8_t mux=0; mux < 8; ++mux) {
923 SET_FULL_MUX(mux); // our sample will use this
924 // wait for mux to settle.
925 for(uint8_t i=0; i < MUX_SETTLE; ++i) {
930 // retrieve current read.
931 buffer[mux] = getADC();// - OFFSET_VOLTAGE;
937 sample = getADC(); // throw away; unknown mux.
939 SET_FULL_MUX(mux + 1); // our *next* sample will use this
941 // retrieve current read.
942 buffer[mux] = getADC();// - OFFSET_VOLTAGE;
952 ADCSRA &= ~(1 << ADEN);
954 // pull all columns' strobe-lines low.
967 int sampleColumn(uint8_t column) {
970 //rval = sampleColumn_k(column, samples+SAMPLE_OFFSET);
971 rval = sampleColumn_8x(column, samples+SAMPLE_OFFSET);
974 for(uint8_t i=0; i<8; ++i) {
975 if(samples[SAMPLE_OFFSET + i] - adc_mux_averages[i] > BUMP_THRESHOLD) {
978 _delay_us(BUMP_REST_US);
981 error_data = samples[SAMPLE_OFFSET +i]; // | ((uint16_t)i << 8);
991 uint8_t testColumn(uint8_t strobe) {
994 for (uint8_t i=0; i < MUXES_COUNT; ++i) {
995 uint16_t delta = keys_averages[(strobe << MUXES_COUNT_XSHIFT) + i];
996 if ((db_sample = samples[SAMPLE_OFFSET + i] >> 1) > (db_threshold = threshold) + (db_delta = delta)) {
1005 void dumpkeys(void) {
1009 if (count >= WARMUP_LOOPS && error) {
1015 for (uint8_t i=0; i < STROBE_LINES; ++i) {
1016 printHex(usb_keymap[i]);
1024 printHex(error_data);
1029 // XXX Will be cleaned up eventually, but this will do for now :P -HaaTa
1030 for (uint8_t i=0; i < STROBE_LINES; ++i) {
1031 for(uint8_t j=0; j<MUXES_COUNT; ++j) {
1032 if ( usb_keymap[i] & (1 << j) ) {
1033 uint8_t key = (i << MUXES_COUNT_XSHIFT) + j;
1035 // Add to the Macro processing buffer
1036 // Automatically handles converting to a USB code and sending off to the PC
1049 //if(usb_dirty) print("\n");
1050 usb_keyboard_send();
1056 #define DEBUG_FULL_SAMPLES_AVERAGES
1057 #ifdef DEBUG_FULL_SAMPLES_AVERAGES
1058 if(!dump_count) { // we don't want to debug-out during the measurements.
1060 // Averages currently set per key
1061 for(int i =0; i< KEY_COUNT; ++i) {
1064 } else if (!(i & 0x07)) {
1068 printHex (keys_averages[i]);
1073 // Previously read full ADC scans?
1074 for(int i =0; i< KEY_COUNT; ++i) {
1077 } else if (!(i & 0x07)) {
1081 printHex(full_samples[i]);
1086 #ifdef DEBUG_STROBE_SAMPLES_AVERAGES
1087 // Per strobe information
1088 uint8_t cur_strober = ze_strober;
1091 printHex(cur_strober);
1093 // Previously read ADC scans on current strobe
1095 for (uint8_t i=0; i < MUXES_COUNT; ++i) {
1097 printHex(full_samples[(cur_strober << MUXES_COUNT_XSHIFT) + i]);
1100 // Averages current set on current strobe
1103 for (uint8_t i=0; i < MUXES_COUNT; ++i) {
1105 printHex(keys_averages[(cur_strober << MUXES_COUNT_XSHIFT) + i]);
1110 #ifdef DEBUG_DELTA_SAMPLE_THRESHOLD
1112 //uint16_t db_delta = 0;
1113 //uint16_t db_sample = 0;
1114 //uint16_t db_threshold = 0;
1115 printHex( db_delta );
1117 printHex( db_sample );
1119 printHex( db_threshold );
1124 #define DEBUG_USB_KEYMAP
1125 #ifdef DEBUG_USB_KEYMAP
1128 // Current keymap values
1129 for (uint8_t i=0; i < STROBE_LINES; ++i) {
1130 printHex(cur_keymap[i]);