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33 pfowler 1 
#include <avr/io.h>
2 
#include <avr/pgmspace.h>
3 
#include <avr/interrupt.h>
4 
 
5 
#define F_CPU 12000000
6 
#include <util/delay.h>
7 
#include <avr/wdt.h>
8 
#include <usbdrv.h>
9 
 
10 
#include <stdlib.h>
11 
#include <string.h>
12 
 
63 pfowler 13 
#include "lcd.h"
60 pfowler 14 
#include "util.h"
40 pfowler 15 
#include "wire.h"
33 pfowler 16 
#include "config.h"
17 
#include "hiddesc.h"
18 
 
39 pfowler 19 
#define ROTS_ATTACHED	1
33 pfowler 20 
#define STAT		0
21 
#define SENT		1
22 
 
39 pfowler 23 
#define SWITCHES	1
24 
#define ON		1
25 
#define OFF		0
26 
 
27 
#define DETECTED	0
28 
#define TIMER		1
29 
#define	DEBOUNCED	2
30 
 
34 pfowler 31 
/*
32 
 * Keyboard modifier codes
33 
 */
34 
#define MOD_CONTROL_LEFT    (1<<0)
35 
#define MOD_SHIFT_LEFT      (1<<1)
36 
#define MOD_ALT_LEFT        (1<<2)
37 
#define MOD_GUI_LEFT        (1<<3)
38 
#define MOD_CONTROL_RIGHT   (1<<4)
39 
#define MOD_SHIFT_RIGHT     (1<<5)
40 
#define MOD_ALT_RIGHT       (1<<6)
41 
#define MOD_GUI_RIGHT       (1<<7)
33 pfowler 42 
 
34 pfowler 43 
 
33 pfowler 44 
void doInt(uint8_t pcint);
45 
uint8_t getKey(void);
46 
 
63 pfowler 47 
uint8_t oldpotVal = 0;
48 
 
49 
volatile uint8_t tmr0_ovf = 0;
50 
volatile uint8_t tmr2_ovf = 0;
51 
volatile uint32_t systime = 0;
52 
volatile uint8_t lcdupdate = 1;
53 
 
54 
uint8_t emblock[] = {   0B00011111,
55 
                        0B00010001,
56 
                        0B00010001,
57 
                        0B00010001,
58 
                        0B00010001,
59 
                        0B00010001,
60 
                        0B00010001,
61 
                        0B00011111 };
62 
 
63 
 
62 pfowler 64 
volatile struct {
65 
	uint8_t current;
66 
	uint8_t last;
67 
	uint8_t mask;
68 
} pcInt[3];
33 pfowler 69 
 
39 pfowler 70 
// switches = [detected][timer][debounced]
71 
volatile uint8_t switches[1][3] = { {0,0,0} };
72 
 
62 pfowler 73 
// rotData = [rot#][(stat|sent)]
74 
//volatile uint8_t rotData[2][2] = { {0,0}, {0,0} };
33 pfowler 75 
 
62 pfowler 76 
volatile struct {
77 
	union {
78 
		uint8_t data;
79 
		struct {
80 
			uint8_t stat:4;
81 
			uint8_t sent:4;
82 
		};
83 
	};
84 
} rotData[2];
85 
 
37 pfowler 86 
uint8_t keyMap[] = { 	0x1E, 0x1F, 0x20,
87 
			0x21, 0x22, 0x23,
88 
			0x24, 0x25, 0x26,
39 pfowler 89 
			0x25, 0x27, 0x20 };
33 pfowler 90 
 
39 pfowler 91 
uint8_t keySelect = 1;
92 
 
33 pfowler 93 
struct {
94 
	uint8_t report_id;
95 
	uint8_t modifier;
39 pfowler 96 
	uint8_t keycode;
33 pfowler 97 
} reportKeyboard;
98 
 
99 
struct{
100 
	uint8_t report_id;
101 
  union {
102 
    uint8_t data1[2];
103 
    struct {
104 
	uint8_t rx:8;
105 
	uint8_t ry:8;
106 
    };
107 
  };
108 
 
109 
  union {
110 
    uint16_t data2;
111 
    struct {
112 
	uint16_t buttons:12;
113 
	uint16_t rot2a:1;
114 
	uint16_t rot2b:1;
115 
	uint16_t rot1a:1;
116 
	uint16_t rot1b:1;
117 
    };
118 
  };
119 
} reportJoystick;
120 
 
39 pfowler 121 
void usbSendHidReport(uchar * data, uchar len) {
122 
	while(1)
123 
	{
124 
		usbPoll();
125 
		if (usbInterruptIsReady())
126 
		{
127 
			usbSetInterrupt(data, len);
128 
			break;
129 
		}
130 
	}
131 
}
132 
 
33 pfowler 133 
usbMsgLen_t usbFunctionSetup(uchar data[8]) {
134 
	usbRequest_t *rq = (void *)data;
135 
 
136 
	if((rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_CLASS) {
137 
		switch (rq->bRequest) {
138 
			case USBRQ_HID_GET_REPORT:
139 
				if (rq->wValue.bytes[0] == 1)
140 
					return sizeof(reportKeyboard);
141 
				else if (rq->wValue.bytes[0] == 2)
142 
					return sizeof(reportJoystick);
143 
				else
144 
					return 0;
145 
			case USBRQ_HID_GET_IDLE:
146 
				return 1;
147 
			default:
148 
				return 0;
149 
		}
150 
	}
151 
	return 0;
152 
}
153 
 
154 
void hadUsbReset(void) {
155 
}
156 
 
157 
int main(void) {
62 pfowler 158 
	analogInit();
33 pfowler 159 
 
39 pfowler 160 
  /*
33 pfowler 161 
  DDR : 1 = Output, 0 = Input
162 
  PORT: 1 = Pullup for Input, otherwise set output
163 
  PIN : Read input pin
164 
  */
165 
 
166 
  /*
39 pfowler 167 
	PB0	- Output 		- Keypad 2
168 
	PB1	- Output 		- Keypad 7
169 
	PB2	- Output 		- Keypad 6
33 pfowler 170 
	PB3	- Output 		- Keypad 4
171 
	PB4	- Input, Pullup		- Function select
36 pfowler 172 
	PB5	- Input, Pullup		- Function select
33 pfowler 173 
  */
174 
  DDRB		= 0B00001111;
36 pfowler 175 
  PORTB 	= 0B00111111;
33 pfowler 176 
 
177 
  /*
178 
	PD0	- Input, Pullup, PCINT16	- Rotary 1a
179 
	PD1	- Input, Pullup, PCINT17	- Rotary 1b
180 
 
181 
 
35 pfowler 182 
	PD4	- Output		- Keypad select status led
39 pfowler 183 
	PD5	- Input, Pullup		- Keypad 3
184 
	PD6	- Input, Pullup		- Keypad 1
185 
	PD7	- Input, Pullup		- Keypad 5
33 pfowler 186 
  */
35 pfowler 187 
  DDRD		= 0B00010000;
188 
  PORTD		= 0B11100011;
33 pfowler 189 
 
190 
  PCMSK2 |= (( 1 << PCINT16 ) | ( 1 << PCINT17 )); //enable encoder pins interrupt sources
191 
  PCICR |= ( 1 << PCIE2 ); //enable pin change interupts
192 
 
193 
  // Timers not used for the moment
194 
  // Setup timer0 - Enable overflow, 8 times prescaler
39 pfowler 195 
	TIMSK0 = (1<<TOIE0);			// Eable timer overflow for Timer0
196 
	TCNT0 = 0x00;				// Set Timer0 to 0
63 pfowler 197 
	TCCR0B = (1<< CS00) ;			// /1 prescaler
33 pfowler 198 
 
63 pfowler 199 
	TIMSK2 = (1<<TOIE2);
200 
	TCNT2 = 0x00;
201 
	TCCR2B = (1<<CS21 | 1<<CS20);
202 
 
40 pfowler 203 
	i2c_master();
63 pfowler 204 
	lcd_init();
205 
	lcd_createChar(0x00, emblock);
40 pfowler 206 
 
63 pfowler 207 
	char strTime[] = {'T', 'i', 'm', 'e', ':', 0x00};
208 
        lcd_setCursor(0, 1);
209 
        lcd_print(strTime);
33 pfowler 210 
 
63 pfowler 211 
	usbDeviceDisconnect();  /* enforce re-enumeration, do this while interrupts are disabled! */
212 
	_delay_ms(500);
213 
	usbDeviceConnect();
214 
 
215 
	wdt_enable(WDTO_1S);
216 
	usbInit();
217 
	sei();
33 pfowler 218 
 
219 
	reportKeyboard.report_id = 1;
220 
	reportJoystick.report_id = 2;
221 
 
222 
  for(;;) {
223 
    wdt_reset();
224 
    usbPoll();
225 
 
39 pfowler 226 
	/*
227 
	 * This is some really bad deboucing code
228 
	 */
229 
 
230 
	// Detect the button press, wait 100 timer cycles (1.7ms / cycle)
231 
	if (rbi(PINB, PB5) == 0 && switches[0][DETECTED]==0) {
232 
		switches[0][DETECTED] = 1;
233 
		switches[0][TIMER] = 100;
234 
	}
235 
 
236 
	// After timer is zero, check switch again.
237 
	//  If switch still pressed, its debounced
238 
	//  Otherwise, reset the debounce
239 
	if (switches[0][DETECTED] == 1 && switches[0][TIMER] == 0 && switches[0][DEBOUNCED]==0) {
240 
		if (rbi(PINB, PB5) == 0)
241 
			switches[0][DEBOUNCED] = 1;
242 
		else {
243 
			switches[0][DETECTED] = 0;
244 
			switches[0][TIMER] = 0;
245 
		}
246 
	}
247 
 
248 
	// If the switch has come up, do another debounce
249 
	if (rbi(PINB, PB5) && switches[0][DETECTED]==2) {
250 
		switches[0][TIMER] = 100;
251 
		switches[0][DETECTED] = 3;
252 
	}
253 
 
254 
	// After the up switch timer is zero, do the debounce check
255 
	// Otherwise, assume switch is still down
256 
	if (switches[0][DETECTED] == 3 && switches[0][TIMER] == 0) {
257 
		if (rbi(PINB, PB5))
258 
			switches[0][DETECTED] = 0;
259 
	}
260 
 
261 
	// Process the switch
262 
	if (switches[0][DEBOUNCED] == 1) {
263 
		xbi(keySelect, 0);
264 
 
265 
		if (keySelect == 0)
266 
			sbi(PORTD, PD4);
267 
		else
268 
			cbi(PORTD, PD4);
269 
 
270 
		switches[0][DETECTED] = 2;
271 
		switches[0][DEBOUNCED] = 0;
272 
	}
273 
 
63 pfowler 274 
	usbPoll();
39 pfowler 275 
 
33 pfowler 276 
    if(usbInterruptIsReady()){
277 
	reportJoystick.data1[0] = (-128 + analogRead(0));
278 
	reportJoystick.data1[1] = (-128 + analogRead(1));
36 pfowler 279 
	reportJoystick.data2 = 0x0000;				// Clear all the buttons
33 pfowler 280 
 
36 pfowler 281 
	reportKeyboard.modifier = 0x00;
39 pfowler 282 
	reportKeyboard.keycode = 0x00;
33 pfowler 283 
 
284 
	uint8_t key = getKey();
39 pfowler 285 
	if (rbi(keySelect, 0)) {
33 pfowler 286 
		// Keypad is joystick
287 
		if (key > 0)
39 pfowler 288 
			reportJoystick.data2 |= (1 << (--key));
33 pfowler 289 
	} else {
290 
		// Keypad is keyboard
291 
		if (key > 0) {
39 pfowler 292 
			if (key==10 || key==12)
293 
				reportKeyboard.modifier |= (1<<1);	//Left shift
294 
			reportKeyboard.keycode = keyMap[--key];
33 pfowler 295 
		}
296 
	}
297 
 
298 
	// Now work out what rotary to send, if any
299 
	// Also record if we sent a positive response,
300 
	//  so we can send a '0' next time (if selected on PD4)
62 pfowler 301 
	// rotData = [rot#][(stat|sent)]
33 pfowler 302 
	uint8_t rot = 0;
303 
	for (rot=0; rot<=(ROTS_ATTACHED - 1); rot++) {
62 pfowler 304 
	        if (rotData[rot].stat == 0x01 && rotData[rot].sent == 0) {
305 
                	rotData[rot].sent = 1;
33 pfowler 306 
			switch (rot) {
307 
				case(0):	reportJoystick.rot1a = 1; break;
308 
				case(1):	reportJoystick.rot2a = 1; break;
309 
			}
62 pfowler 310 
	        } else if (rotData[rot].stat == 0x02 && rotData[rot].sent == 0) {
311 
                	rotData[rot].sent = 1;
33 pfowler 312 
                        switch (rot) {
313 
                                case(0):      reportJoystick.rot1b = 1; break;
314 
                                case(1):      reportJoystick.rot2b = 1; break;
315 
                        }
316 
	        } else {
62 pfowler 317 
        	        rotData[rot].sent = 0;
33 pfowler 318 
	        }
62 pfowler 319 
		rotData[rot].stat = 0;
33 pfowler 320 
 
321 
	        if (rbi(PINB, PB4))
62 pfowler 322 
        	        rotData[rot].sent = 0;
33 pfowler 323 
	}
324 
 
325 
      /* called after every poll of the interrupt endpoint */
39 pfowler 326 
      //usbSetInterrupt(&reportKeyboard, sizeof(reportKeyboard));
327 
      //usbSetInterrupt(&reportJoystick, sizeof(reportJoystick));
328 
 
329 
	usbSendHidReport(&reportKeyboard, sizeof(reportKeyboard));
330 
	usbSendHidReport(&reportJoystick, sizeof(reportJoystick));
331 
 
33 pfowler 332 
    }
63 pfowler 333 
 
334 
	usbPoll();
335 
	if (lcdupdate) {
336 
		lcdupdate = 0;
337 
 
338 
                char syschar[10];
339 
                ultoa(systime, syschar, 10);
340 
                lcd_overprint_right(syschar, 10, 5, 1);
341 
 
342 
                uint8_t potVal = map_8(analogRead(0), 0, 255, 0, 100);
343 
                if (potVal != oldpotVal) {
344 
                        lcd_percent_graph(potVal, 0, 0);
345 
                        oldpotVal = potVal;
346 
 
347 
                        char pot[3];
348 
                        utoa(potVal, pot, 10);
349 
                        lcd_overprint_right(pot, 3, 11, 0);
350 
 
351 
                        // Set percentage
352 
                        lcd_setCursor(15, 0);
353 
                        lcd_char(0x25);
354 
                }
355 
 
356 
 
357 
	}
358 
 
33 pfowler 359 
  }
360 
}
361 
 
362 
uint8_t getKey() {
363 
	uint8_t col, row = 0;
364 
	uint8_t key = 0;
365 
	uint8_t n = 1;
366 
 
367 
	for (row=0; row<=3; row++) {
368 
		cbi(PORTB, row);
369 
		_delay_us(10);				// Wait for the port to change
370 
 
371 
		for (col=5; col<=7; col++) {
372 
			if (rbi(PIND, col) == 0)
373 
				key = n;
374 
			n++;
375 
		}
376 
 
377 
		sbi(PORTB, row);
378 
	}
379 
	return key;
380 
}
381 
 
382 
/*
383 
 *
384 
 * Process the Pin Change Interrupt.
385 
 * pcint provides what bank caused the interrupt
386 
 *
387 
 */
62 pfowler 388 
void pcInterrupt(uint8_t pcint) {
33 pfowler 389 
 
62 pfowler 390 
	switch (pcint) {
391 
		case 0:	pcInt[pcint].current = PINB; break;
392 
		case 1:	pcInt[pcint].current = PIND; break;
393 
		case 2:	pcInt[pcint].current = PINC; break;
394 
	}
395 
	pcInt[pcint].current = PIND;
396 
	pcInt[pcint].mask = pcInt[pcint].current ^ pcInt[pcint].last;
397 
	pcInt[pcint].last = pcInt[pcint].current;
398 
 
33 pfowler 399 
	// Select what rotary we are dealing with
400 
	//   based on the pc interrupt that fired.
401 
	uint8_t rot = 0;
402 
	if (pcint == 1)
403 
		rot = 1;
404 
 
405 
	// If rot stat is not 0, we havn't sent
406 
	//  our last results yet. Skip this click.
62 pfowler 407 
	if (rotData[rot].stat != 0) {
408 
		pcInt[pcint].mask = 0;
33 pfowler 409 
		return;
410 
	}
411 
	// Check which pin caused the interrupt. If they both
412 
	//  equal 0, the pin that interrupted is the direction
62 pfowler 413 
  	if (rbi(pcInt[pcint].current, PCINT17) == 0
414 
		&& rbi(pcInt[pcint].current, PCINT17) == 0
415 
		&& rbi(pcInt[pcint].mask, PCINT16) ) {
416 
			rotData[rot].stat = 1;
417 
  	} else if (rbi(pcInt[pcint].current, PCINT16) == 0
418 
		&& rbi(pcInt[pcint].current, PCINT17) == 0
419 
		&& rbi(pcInt[pcint].mask, PCINT17) ) {
420 
			rotData[rot].stat = 2;
33 pfowler 421 
  	}
422 
 
423 
	// Clear the mask so we know we've delth with it
62 pfowler 424 
	pcInt[pcint].mask = 0;
33 pfowler 425 
}
426 
 
427 
ISR(TIMER0_OVF_vect) {
63 pfowler 428 
	tmr0_ovf++;
429 
	if (tmr0_ovf>=46) {
430 
		systime++;
431 
		tmr0_ovf = 0;
432 
	}
39 pfowler 433 
	if (switches[0][DETECTED] && switches[0][TIMER])
434 
		switches[0][TIMER]--;
33 pfowler 435 
}
436 
 
63 pfowler 437 
ISR(TIMER2_OVF_vect) {
438 
        tmr2_ovf++;
439 
        if (tmr2_ovf>=58) {
440 
                lcdupdate=1;
441 
                tmr2_ovf = 0;
442 
        }
443 
}
444 
 
445 
 
62 pfowler 446 
ISR(PCINT0_vect) {
447 
	pcInterrupt(0);
33 pfowler 448 
}
449 
 
62 pfowler 450 
ISR(PCINT1_vect) {
451 
	pcInterrupt(1);
33 pfowler 452 
}
453 
 
62 pfowler 454 
ISR(PCINT2_vect) {
455 
	pcInterrupt(2);
456 
}
457