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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)]
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volatile uint8_t rotdata[2][2] = { {0,0}, {0,0} };
43 
 
34 pfowler 44 
uint8_t keyMap[] = { 	49, 50, 51,
45 
			52, 53, 54,
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			55, 56, 57,
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			56, 48, 52 };
33 pfowler 48 
 
49 
struct {
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	uint8_t report_id;
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	uint8_t modifier;
34 pfowler 52 
	uint8_t keycode;
33 pfowler 53 
} reportKeyboard;
54 
 
55 
struct{
56 
	uint8_t report_id;
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  union {
58 
    uint8_t data1[2];
59 
    struct {
60 
	uint8_t rx:8;
61 
	uint8_t ry:8;
62 
    };
63 
  };
64 
 
65 
  union {
66 
    uint16_t data2;
67 
    struct {
68 
	uint16_t buttons:12;
69 
	uint16_t rot2a:1;
70 
	uint16_t rot2b:1;
71 
	uint16_t rot1a:1;
72 
	uint16_t rot1b:1;
73 
    };
74 
  };
75 
} reportJoystick;
76 
 
77 
usbMsgLen_t usbFunctionSetup(uchar data[8]) {
78 
	usbRequest_t *rq = (void *)data;
79 
 
80 
	if((rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_CLASS) {
81 
		switch (rq->bRequest) {
82 
			case USBRQ_HID_GET_REPORT:
83 
				if (rq->wValue.bytes[0] == 1)
84 
					return sizeof(reportKeyboard);
85 
				else if (rq->wValue.bytes[0] == 2)
86 
					return sizeof(reportJoystick);
87 
				else
88 
					return 0;
89 
			case USBRQ_HID_GET_IDLE:
90 
				return 1;
91 
			default:
92 
				return 0;
93 
		}
94 
	}
95 
	return 0;
96 
}
97 
 
98 
void hadUsbReset(void) {
99 
}
100 
 
101 
int main(void) {
102 
 
103 
  ACSR |= (1<<ACD); // Disable analog comparator
104 
 
105 
  ADMUX = (1<<ADLAR) | (0<<REFS0) | (1<<REFS1);
106 
  ADCSRA = (1<<ADEN) | (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0) ;
107 
 
108 
  /*
109 
  DDR : 1 = Output, 0 = Input
110 
  PORT: 1 = Pullup for Input, otherwise set output
111 
  PIN : Read input pin
112 
  */
113 
 
114 
  /*
115 
	PB0	- Output 		- Keypad 1
116 
	PB1	- Output 		- Keypad 2
117 
	PB2	- Output 		- Keypad 3
118 
	PB3	- Output 		- Keypad 4
119 
	PB4	- Input, Pullup		- Function select
36 pfowler 120 
	PB5	- Input, Pullup		- Function select
33 pfowler 121 
  */
122 
  DDRB		= 0B00001111;
36 pfowler 123 
  PORTB 	= 0B00111111;
33 pfowler 124 
 
125 
  /*
126 
	PD0	- Input, Pullup, PCINT16	- Rotary 1a
127 
	PD1	- Input, Pullup, PCINT17	- Rotary 1b
128 
 
129 
 
35 pfowler 130 
	PD4	- Output		- Keypad select status led
33 pfowler 131 
	PD5	- Input, Pullup		- Keypad 6
132 
	PD6	- Input, Pullup		- Keypad 7
133 
	PD7	- Input, Pullup		- Keypad 8
134 
  */
35 pfowler 135 
  DDRD		= 0B00010000;
136 
  PORTD		= 0B11100011;
33 pfowler 137 
 
138 
  PCMSK2 |= (( 1 << PCINT16 ) | ( 1 << PCINT17 )); //enable encoder pins interrupt sources
139 
  PCICR |= ( 1 << PCIE2 ); //enable pin change interupts
140 
 
141 
  // Timers not used for the moment
142 
  // Setup timer0 - Enable overflow, 8 times prescaler
143 
  //TIMSK0 = (1<<TOIE0);			// Eable timer overflow for Timer0
144 
  //TCNT0 = 0x00;				// Set Timer0 to 0
145 
  //TCCR0B = (1<< CS01) ;			// /8 prescaler
146 
 
147 
  usbDeviceDisconnect();  /* enforce re-enumeration, do this while interrupts are disabled! */
148 
  _delay_ms(500);
149 
  usbDeviceConnect();
150 
 
151 
  wdt_enable(WDTO_1S);
152 
  usbInit();
153 
  sei();
154 
 
155 
	reportKeyboard.report_id = 1;
156 
	reportJoystick.report_id = 2;
157 
 
158 
  for(;;) {
159 
    wdt_reset();
160 
    usbPoll();
161 
 
162 
    if(usbInterruptIsReady()){
163 
	reportJoystick.data1[0] = (-128 + analogRead(0));
164 
	reportJoystick.data1[1] = (-128 + analogRead(1));
36 pfowler 165 
	reportJoystick.data2 = 0x0000;				// Clear all the buttons
33 pfowler 166 
 
36 pfowler 167 
	reportKeyboard.keycode = 0x00;
168 
	reportKeyboard.modifier = 0x00;
33 pfowler 169 
 
170 
	uint8_t key = getKey();
171 
	if (rbi(PINB, PB5)) {
36 pfowler 172 
		cbi(PORTD, PD4);
33 pfowler 173 
		// Keypad is joystick
174 
		if (key > 0)
175 
			reportJoystick.data2 |= (1 << (key -1));
176 
	} else {
36 pfowler 177 
		sbi(PORTD, PD4);
33 pfowler 178 
		// Keypad is keyboard
179 
		if (key > 0) {
36 pfowler 180 
			key--;
181 
			//if (key==10 || key==12)
182 
			//	reportKeyboard.modifier |= (1<<1);	//Left shif
183 
			//reportKeyboard.keycode = keyMap[key];
184 
			reportKeyboard.keycode = 0x30;
185 
 
33 pfowler 186 
		}
187 
	}
188 
 
189 
	// Now work out what rotary to send, if any
190 
	// Also record if we sent a positive response,
191 
	//  so we can send a '0' next time (if selected on PD4)
192 
	// rotdata = [rot#][(stat|sent)]
193 
	uint8_t rot = 0;
194 
	for (rot=0; rot<=(ROTS_ATTACHED - 1); rot++) {
195 
	        if (rotdata[rot][STAT] == 0x01 && rotdata[rot][SENT] == 0) {
196 
                	rotdata[rot][SENT] = 1;
197 
			switch (rot) {
198 
				case(0):	reportJoystick.rot1a = 1; break;
199 
				case(1):	reportJoystick.rot2a = 1; break;
200 
			}
201 
	        } else if (rotdata[rot][STAT] == 0x02 && rotdata[rot][SENT] == 0) {
202 
                	rotdata[rot][SENT] = 1;
203 
                        switch (rot) {
204 
                                case(0):      reportJoystick.rot1b = 1; break;
205 
                                case(1):      reportJoystick.rot2b = 1; break;
206 
                        }
207 
	        } else {
208 
        	        rotdata[rot][SENT] = 0;
209 
	        }
210 
		rotdata[rot][STAT] = 0;
211 
 
212 
	        if (rbi(PINB, PB4))
213 
        	        rotdata[rot][SENT] = 0;
214 
	}
215 
 
216 
      /* called after every poll of the interrupt endpoint */
217 
      usbSetInterrupt(&reportKeyboard, sizeof(reportKeyboard));
218 
      usbSetInterrupt(&reportJoystick, sizeof(reportJoystick));
219 
    }
220 
  }
221 
}
222 
 
223 
uint8_t analogRead(uint8_t pin) {
224 
	ADMUX = (1<<ADLAR) | (1<<REFS0) | (0<<REFS1) | (pin & 0x0f);
225 
	ADCSRA |= (1<<ADSC);		// Start converting
226 
 
227 
	while (((ADCSRA >> ADSC) & 1)) {}	//Wait until conversion finished
228 
	uint8_t result = ADCH;
229 
	//ADCSRA |= (0<<ADSC);		// Stop converting
230 
 
231 
	return result;
232 
}
233 
 
234 
uint8_t getKey() {
235 
	uint8_t col, row = 0;
236 
	uint8_t key = 0;
237 
	uint8_t n = 1;
238 
 
239 
	for (row=0; row<=3; row++) {
240 
		cbi(PORTB, row);
241 
		_delay_us(10);				// Wait for the port to change
242 
 
243 
		for (col=5; col<=7; col++) {
244 
			if (rbi(PIND, col) == 0)
245 
				key = n;
246 
			n++;
247 
		}
248 
 
249 
		sbi(PORTB, row);
250 
	}
251 
	return key;
252 
}
253 
 
254 
/*
255 
 *
256 
 * Process the Pin Change Interrupt.
257 
 * pcint provides what bank caused the interrupt
258 
 *
259 
 */
260 
void doInt(uint8_t pcint) {
261 
 
262 
	// Select what rotary we are dealing with
263 
	//   based on the pc interrupt that fired.
264 
	uint8_t rot = 0;
265 
	if (pcint == 1)
266 
		rot = 1;
267 
 
268 
	// If rot stat is not 0, we havn't sent
269 
	//  our last results yet. Skip this click.
270 
	if (rotdata[rot][STAT] != 0) {
271 
		pcIntMask[pcint] = 0;
272 
		return;
273 
	}
274 
	// Check which pin caused the interrupt. If they both
275 
	//  equal 0, the pin that interrupted is the direction
276 
  	if (rbi(pcIntCurr[pcint], PCINT17) == 0
277 
		&& rbi(pcIntCurr[pcint], PCINT17) == 0
278 
		&& rbi(pcIntMask[pcint], PCINT16) ) {
279 
			rotdata[rot][STAT] = 1;
280 
  	} else if (rbi(pcIntCurr[pcint], PCINT16) == 0
281 
		&& rbi(pcIntCurr[pcint], PCINT17) == 0
282 
		&& rbi(pcIntMask[pcint], PCINT17) ) {
283 
			rotdata[rot][STAT] = 2;
284 
  	}
285 
 
286 
	// Clear the mask so we know we've delth with it
287 
	pcIntMask[pcint] = 0;
288 
}
289 
 
290 
/* Not used for the moment
291 
ISR(TIMER0_OVF_vect) {
292 
	timer0_ovf++;
293 
}
294 
*/
295 
 
296 
ISR(PCINT1_vect)
297 
{
298 
        // Save the state and work out which pin caused
299 
        //  the interrupt to occur
300 
        pcIntCurr[1] = PIND;
301 
        pcIntMask[1] = pcIntCurr[1] ^ pcIntLast[1];
302 
        pcIntLast[1] = pcIntCurr[1];
303 
        doInt(1);
304 
}
305 
 
306 
ISR(PCINT2_vect)
307 
{
308 
	// Save the state and work out which pin caused
309 
	//  the interrupt to occur
310 
	pcIntCurr[2] = PIND;
311 
	pcIntMask[2] = pcIntCurr[2] ^ pcIntLast[2];
312 
	pcIntLast[2] = pcIntCurr[2];
313 
	doInt(2);
314 
}
315