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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 
 
13 
#include "config.h"
14 
#include "hiddesc.h"
15 
 
16 
#define ROTS_ATTACHED	2
17 
#define STAT		0
18 
#define SENT		1
19 
 
34 pfowler 20 
/*
21 
 * Keyboard modifier codes
22 
 */
23 
#define MOD_CONTROL_LEFT    (1<<0)
24 
#define MOD_SHIFT_LEFT      (1<<1)
25 
#define MOD_ALT_LEFT        (1<<2)
26 
#define MOD_GUI_LEFT        (1<<3)
27 
#define MOD_CONTROL_RIGHT   (1<<4)
28 
#define MOD_SHIFT_RIGHT     (1<<5)
29 
#define MOD_ALT_RIGHT       (1<<6)
30 
#define MOD_GUI_RIGHT       (1<<7)
33 pfowler 31 
 
34 pfowler 32 
 
33 pfowler 33 
void doInt(uint8_t pcint);
34 
uint8_t getKey(void);
35 
uint8_t analogRead(uint8_t pin);
36 
 
37 
volatile uint8_t pcIntCurr[3] = {0,0,0};
38 
volatile uint8_t pcIntLast[3] = {0,0,0};
39 
volatile uint8_t pcIntMask[3] = {0,0,0};
40 
 
41 
// rotdata = [rot#][(stat|sent)]
42 
volatile uint8_t rotdata[2][2] = { {0,0}, {0,0} };
43 
 
37 pfowler 44 
uint8_t keyMap[] = { 	0x1E, 0x1F, 0x20,
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			0x21, 0x22, 0x23,
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			0x24, 0x25, 0x26,
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			0x20, 0x27, 0x25 };
33 pfowler 48 
 
49 
struct {
50 
	uint8_t report_id;
51 
	uint8_t modifier;
37 pfowler 52 
	uint8_t reserved;
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	uint8_t keycode[6];
33 pfowler 54 
} reportKeyboard;
55 
 
56 
struct{
57 
	uint8_t report_id;
58 
  union {
59 
    uint8_t data1[2];
60 
    struct {
61 
	uint8_t rx:8;
62 
	uint8_t ry:8;
63 
    };
64 
  };
65 
 
66 
  union {
67 
    uint16_t data2;
68 
    struct {
69 
	uint16_t buttons:12;
70 
	uint16_t rot2a:1;
71 
	uint16_t rot2b:1;
72 
	uint16_t rot1a:1;
73 
	uint16_t rot1b:1;
74 
    };
75 
  };
76 
} reportJoystick;
77 
 
78 
usbMsgLen_t usbFunctionSetup(uchar data[8]) {
79 
	usbRequest_t *rq = (void *)data;
80 
 
81 
	if((rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_CLASS) {
82 
		switch (rq->bRequest) {
83 
			case USBRQ_HID_GET_REPORT:
84 
				if (rq->wValue.bytes[0] == 1)
85 
					return sizeof(reportKeyboard);
86 
				else if (rq->wValue.bytes[0] == 2)
87 
					return sizeof(reportJoystick);
88 
				else
89 
					return 0;
90 
			case USBRQ_HID_GET_IDLE:
91 
				return 1;
92 
			default:
93 
				return 0;
94 
		}
95 
	}
96 
	return 0;
97 
}
98 
 
99 
void hadUsbReset(void) {
100 
}
101 
 
102 
int main(void) {
103 
 
104 
  ACSR |= (1<<ACD); // Disable analog comparator
105 
 
106 
  ADMUX = (1<<ADLAR) | (0<<REFS0) | (1<<REFS1);
107 
  ADCSRA = (1<<ADEN) | (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0) ;
108 
 
109 
  /*
110 
  DDR : 1 = Output, 0 = Input
111 
  PORT: 1 = Pullup for Input, otherwise set output
112 
  PIN : Read input pin
113 
  */
114 
 
115 
  /*
116 
	PB0	- Output 		- Keypad 1
117 
	PB1	- Output 		- Keypad 2
118 
	PB2	- Output 		- Keypad 3
119 
	PB3	- Output 		- Keypad 4
120 
	PB4	- Input, Pullup		- Function select
36 pfowler 121 
	PB5	- Input, Pullup		- Function select
33 pfowler 122 
  */
123 
  DDRB		= 0B00001111;
36 pfowler 124 
  PORTB 	= 0B00111111;
33 pfowler 125 
 
126 
  /*
127 
	PD0	- Input, Pullup, PCINT16	- Rotary 1a
128 
	PD1	- Input, Pullup, PCINT17	- Rotary 1b
129 
 
130 
 
35 pfowler 131 
	PD4	- Output		- Keypad select status led
33 pfowler 132 
	PD5	- Input, Pullup		- Keypad 6
133 
	PD6	- Input, Pullup		- Keypad 7
134 
	PD7	- Input, Pullup		- Keypad 8
135 
  */
35 pfowler 136 
  DDRD		= 0B00010000;
137 
  PORTD		= 0B11100011;
33 pfowler 138 
 
139 
  PCMSK2 |= (( 1 << PCINT16 ) | ( 1 << PCINT17 )); //enable encoder pins interrupt sources
140 
  PCICR |= ( 1 << PCIE2 ); //enable pin change interupts
141 
 
142 
  // Timers not used for the moment
143 
  // Setup timer0 - Enable overflow, 8 times prescaler
144 
  //TIMSK0 = (1<<TOIE0);			// Eable timer overflow for Timer0
145 
  //TCNT0 = 0x00;				// Set Timer0 to 0
146 
  //TCCR0B = (1<< CS01) ;			// /8 prescaler
147 
 
148 
  usbDeviceDisconnect();  /* enforce re-enumeration, do this while interrupts are disabled! */
149 
  _delay_ms(500);
150 
  usbDeviceConnect();
151 
 
152 
  wdt_enable(WDTO_1S);
153 
  usbInit();
154 
  sei();
155 
 
156 
	reportKeyboard.report_id = 1;
37 pfowler 157 
	reportKeyboard.reserved = 0x00;
158 
 
33 pfowler 159 
	reportJoystick.report_id = 2;
160 
 
37 pfowler 161 
 
33 pfowler 162 
  for(;;) {
163 
    wdt_reset();
164 
    usbPoll();
165 
 
166 
    if(usbInterruptIsReady()){
167 
	reportJoystick.data1[0] = (-128 + analogRead(0));
168 
	reportJoystick.data1[1] = (-128 + analogRead(1));
36 pfowler 169 
	reportJoystick.data2 = 0x0000;				// Clear all the buttons
33 pfowler 170 
 
36 pfowler 171 
	reportKeyboard.modifier = 0x00;
37 pfowler 172 
	reportKeyboard.keycode[0] = 0x00;
33 pfowler 173 
 
174 
	uint8_t key = getKey();
175 
	if (rbi(PINB, PB5)) {
36 pfowler 176 
		cbi(PORTD, PD4);
33 pfowler 177 
		// Keypad is joystick
178 
		if (key > 0)
179 
			reportJoystick.data2 |= (1 << (key -1));
180 
	} else {
36 pfowler 181 
		sbi(PORTD, PD4);
33 pfowler 182 
		// Keypad is keyboard
183 
		if (key > 0) {
36 pfowler 184 
			key--;
37 pfowler 185 
			//if (key==0x20 || key==0x25)
36 pfowler 186 
			//	reportKeyboard.modifier |= (1<<1);	//Left shif
187 
			//reportKeyboard.keycode = keyMap[key];
37 pfowler 188 
			reportKeyboard.keycode[0] = 0x30;
36 pfowler 189 
 
33 pfowler 190 
		}
191 
	}
192 
 
193 
	// Now work out what rotary to send, if any
194 
	// Also record if we sent a positive response,
195 
	//  so we can send a '0' next time (if selected on PD4)
196 
	// rotdata = [rot#][(stat|sent)]
197 
	uint8_t rot = 0;
198 
	for (rot=0; rot<=(ROTS_ATTACHED - 1); rot++) {
199 
	        if (rotdata[rot][STAT] == 0x01 && rotdata[rot][SENT] == 0) {
200 
                	rotdata[rot][SENT] = 1;
201 
			switch (rot) {
202 
				case(0):	reportJoystick.rot1a = 1; break;
203 
				case(1):	reportJoystick.rot2a = 1; break;
204 
			}
205 
	        } else if (rotdata[rot][STAT] == 0x02 && rotdata[rot][SENT] == 0) {
206 
                	rotdata[rot][SENT] = 1;
207 
                        switch (rot) {
208 
                                case(0):      reportJoystick.rot1b = 1; break;
209 
                                case(1):      reportJoystick.rot2b = 1; break;
210 
                        }
211 
	        } else {
212 
        	        rotdata[rot][SENT] = 0;
213 
	        }
214 
		rotdata[rot][STAT] = 0;
215 
 
216 
	        if (rbi(PINB, PB4))
217 
        	        rotdata[rot][SENT] = 0;
218 
	}
219 
 
220 
      /* called after every poll of the interrupt endpoint */
221 
      usbSetInterrupt(&reportKeyboard, sizeof(reportKeyboard));
222 
      usbSetInterrupt(&reportJoystick, sizeof(reportJoystick));
223 
    }
224 
  }
225 
}
226 
 
227 
uint8_t analogRead(uint8_t pin) {
228 
	ADMUX = (1<<ADLAR) | (1<<REFS0) | (0<<REFS1) | (pin & 0x0f);
229 
	ADCSRA |= (1<<ADSC);		// Start converting
230 
 
231 
	while (((ADCSRA >> ADSC) & 1)) {}	//Wait until conversion finished
232 
	uint8_t result = ADCH;
233 
	//ADCSRA |= (0<<ADSC);		// Stop converting
234 
 
235 
	return result;
236 
}
237 
 
238 
uint8_t getKey() {
239 
	uint8_t col, row = 0;
240 
	uint8_t key = 0;
241 
	uint8_t n = 1;
242 
 
243 
	for (row=0; row<=3; row++) {
244 
		cbi(PORTB, row);
245 
		_delay_us(10);				// Wait for the port to change
246 
 
247 
		for (col=5; col<=7; col++) {
248 
			if (rbi(PIND, col) == 0)
249 
				key = n;
250 
			n++;
251 
		}
252 
 
253 
		sbi(PORTB, row);
254 
	}
255 
	return key;
256 
}
257 
 
258 
/*
259 
 *
260 
 * Process the Pin Change Interrupt.
261 
 * pcint provides what bank caused the interrupt
262 
 *
263 
 */
264 
void doInt(uint8_t pcint) {
265 
 
266 
	// Select what rotary we are dealing with
267 
	//   based on the pc interrupt that fired.
268 
	uint8_t rot = 0;
269 
	if (pcint == 1)
270 
		rot = 1;
271 
 
272 
	// If rot stat is not 0, we havn't sent
273 
	//  our last results yet. Skip this click.
274 
	if (rotdata[rot][STAT] != 0) {
275 
		pcIntMask[pcint] = 0;
276 
		return;
277 
	}
278 
	// Check which pin caused the interrupt. If they both
279 
	//  equal 0, the pin that interrupted is the direction
280 
  	if (rbi(pcIntCurr[pcint], PCINT17) == 0
281 
		&& rbi(pcIntCurr[pcint], PCINT17) == 0
282 
		&& rbi(pcIntMask[pcint], PCINT16) ) {
283 
			rotdata[rot][STAT] = 1;
284 
  	} else if (rbi(pcIntCurr[pcint], PCINT16) == 0
285 
		&& rbi(pcIntCurr[pcint], PCINT17) == 0
286 
		&& rbi(pcIntMask[pcint], PCINT17) ) {
287 
			rotdata[rot][STAT] = 2;
288 
  	}
289 
 
290 
	// Clear the mask so we know we've delth with it
291 
	pcIntMask[pcint] = 0;
292 
}
293 
 
294 
/* Not used for the moment
295 
ISR(TIMER0_OVF_vect) {
296 
	timer0_ovf++;
297 
}
298 
*/
299 
 
300 
ISR(PCINT1_vect)
301 
{
302 
        // Save the state and work out which pin caused
303 
        //  the interrupt to occur
304 
        pcIntCurr[1] = PIND;
305 
        pcIntMask[1] = pcIntCurr[1] ^ pcIntLast[1];
306 
        pcIntLast[1] = pcIntCurr[1];
307 
        doInt(1);
308 
}
309 
 
310 
ISR(PCINT2_vect)
311 
{
312 
	// Save the state and work out which pin caused
313 
	//  the interrupt to occur
314 
	pcIntCurr[2] = PIND;
315 
	pcIntMask[2] = pcIntCurr[2] ^ pcIntLast[2];
316 
	pcIntLast[2] = pcIntCurr[2];
317 
	doInt(2);
318 
}
319