Subversion Repositories group.electronics

Rev

Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
122 pfowler 1 
#include <avr/io.h>
2 
#include <avr/wdt.h>
3 
#include <avr/interrupt.h>
127 pfowler 4 
#include <string.h>
122 pfowler 5 
#include <util/delay.h>
6 
#include <stdlib.h>
7 
 
128 pfowler 8 
#include "config.h"
123 pfowler 9 
#include "avrutil.h"
128 pfowler 10 
#include "hc595.h"
11 
#include "twires.h"
122 pfowler 12 
 
128 pfowler 13 
 
122 pfowler 14 
#ifndef NULL
15 
#define NULL    ((void *)0)
16 
#endif
17 
 
18 
 
128 pfowler 19 
void writeSegment(uint8_t digit, uint8_t value);
20 
void pcInterrupt(void);
21 
void receiveEvent(uint8_t howMany);
22 
 
122 pfowler 23 
/* ------------------------------------------------------------------------- */
24 
 
128 pfowler 25 
#define I2C_SLAVE_ADDR  0x26
26 
#ifndef TWI_RX_BUFFER_SIZE
27 
#define TWI_RX_BUFFER_SIZE ( 16 )
28 
#endif
127 pfowler 29 
 
122 pfowler 30 
volatile uint8_t tmr0_ovf = 0;
127 pfowler 31 
volatile struct {
32 
        uint8_t current;
33 
        uint8_t last;
34 
        uint8_t mask;
128 pfowler 35 
} pcInt;
122 pfowler 36 
 
128 pfowler 37 
struct {
127 pfowler 38 
	int8_t outer;
39 
	int8_t inner;
40 
} input;
122 pfowler 41 
 
128 pfowler 42 
//volatile uint8_t doInt = 0;
123 pfowler 43 
 
128 pfowler 44 
 
45 
 
46 
uint8_t disVal[] = {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1};
47 
uint8_t disPt[] = {0, 0};
48 
 
122 pfowler 49 
int main(void) {
50 
 
51 
 
52 
  /*
53 
  DDR : 1 = Output, 0 = Input
54 
  PORT: 1 = Pullup for Input, otherwise set output
55 
  PIN : Read input pin
56 
  */
57 
 
128 pfowler 58 
 
122 pfowler 59 
  /*
128 pfowler 60 
		PA0	- Output					- System LED
61 
		PA1	- Input, Pullup				- System button
62 
		PA2 - N/A						- Reset
63 
  */
64 
  DDRA          = 0B00000001;
65 
  PORTA         = 0B00000010;
66 
  /*
67 
        PB0     - Input, PCInt, Pullup	- Rot1a
68 
        PB1     - Input, PCInt, Pullup	- Rot1b
69 
        PB2     - Input, PCInt, Pullup	- Rot2a
70 
        PB3     - Input, PCInt, Pullup	- Rot2b
71 
        PB4     - Input, Pullup			- Swap button
127 pfowler 72 
        PB5     -
73 
        PB6     -
74 
        PB7     -
122 pfowler 75 
  */
128 pfowler 76 
  DDRB          = 0B00000000;
77 
  PORTB         = 0B00011111;
122 pfowler 78 
 
79 
  /*
127 pfowler 80 
        PD0     -
81 
        PD1     -
128 pfowler 82 
        PD2     -	Output			- Decimal Point
83 
        PD3     -	Output			- 4511 blanking
84 
        PD4     -	Output			- HC595 DS
85 
        PD5     - 	Output			- HC595 ST
86 
        PD6     -	Output			- HC595 SH
122 pfowler 87 
  */
128 pfowler 88 
  DDRD          = 0B01111100;
89 
  PORTD         = 0B00000000;
122 pfowler 90 
 
128 pfowler 91 
    systime = 0;
127 pfowler 92 
    sysclockInit();
93 
 
128 pfowler 94 
    PCMSK |= (( 1 << PCINT0 ) | ( 1 << PCINT1 )| ( 1 << PCINT2 )| ( 1 << PCINT3 ));
95 
    GIMSK |= (1 << PCIE);
96 
    //PCICR |= ( 1 << PCIE1 );
127 pfowler 97 
 
128 pfowler 98 
    pcInt.last = PINB;
99 
    pcInt.current = pcInt.last;
100 
    pcInt.mask = 0;
127 pfowler 101 
 
128 pfowler 102 
    twires_begin(I2C_SLAVE_ADDR);
103 
    twires_onReceive(receiveEvent);
122 pfowler 104 
 
128 pfowler 105 
    wdt_enable(WDTO_1S);	// Watchdog for 1 sec
106 
    sei();					// Enable interrupts
122 pfowler 107 
 
128 pfowler 108 
    hc595_init();
109 
    hc595_write(0x00);
127 pfowler 110 
 
128 pfowler 111 
    uint32_t refresh = systime;
127 pfowler 112 
 
128 pfowler 113 
    sbi(PORTA, PA0);
114 
    _delay_ms(100);
115 
    cbi(PORTA, PA0);
127 pfowler 116 
 
117 
 
128 pfowler 118 
    uint8_t disIdx = 0;
127 pfowler 119 
 
120 
 
122 pfowler 121 
    for(;;){
127 pfowler 122 
    	 wdt_reset();
123 pfowler 123 
 
128 pfowler 124 
    	/*
125 
		if ( rbi(PINA, PA1) )
126 
			cbi(PORTA, PA0);
127 
		else
128 
			sbi (PORTA, PA0);
129 
		*/
123 pfowler 130 
 
128 pfowler 131 
		if (pcInt.current != pcInt.last) {
132 
			pcInterrupt();
133 
			//doInt = 0;
127 pfowler 134 
		}
135 
 
128 pfowler 136 
		if (systime > refresh) {
137 
			writeSegment(disIdx, disVal[disIdx]);
138 
			refresh = systime+2;
139 
			disIdx++;
140 
			if (disIdx > 10) disIdx = 0;
127 pfowler 141 
		}
142 
 
128 pfowler 143 
		twires_stop_check();
144 
    }
145 
    return 0;
146 
}
127 pfowler 147 
 
128 pfowler 148 
void receiveEvent(uint8_t bytes) {
149 
	uint8_t cmd = twires_receive();
150 
	bytes--;
151 
	switch (cmd) {
152 
		case (0x05): {
153 
				while (bytes--) {
154 
					uint8_t data = twires_receive();
155 
					disVal[(data >> 4)] = (data & 0x0f);
156 
				}
127 pfowler 157 
		}
128 pfowler 158 
			break;
159 
		case (0x08): {
160 
				disPt[0] = twires_receive();
161 
				disPt[1] = twires_receive();
162 
		}
163 
			break;
164 
		case (0x0a): {
165 
					twires_send(input.outer);
166 
		}
167 
			break;
168 
		case (0x0b): {
169 
					twires_send(input.inner);
170 
		}
171 
			break;
172 
		case (0x0c): {
173 
					twires_send(!rbi(PINB, PB4));
174 
		}
175 
			break;
176 
		default: {
177 
			while (twires_available())
178 
				twires_receive();
179 
		}
180 
			break;
181 
	}
182 
}
127 pfowler 183 
 
128 pfowler 184 
void writeSegment(uint8_t digit, uint8_t value) {
185 
	uint8_t dp = 0;
186 
	if (digit <= 4 && rbi(disPt[0], digit)) dp = 1;
187 
	if (digit > 4 && rbi(disPt[1], digit-5)) dp = 1;
127 pfowler 188 
 
128 pfowler 189 
	cbi(PORTD, PD3);			// Blank the 4511
190 
	cbi(PORTD, PD2);			// Drop the DP before changing digit
191 
	hc595_write((value << 4) | (digit & 0x0f)); //Write the value and digit
192 
	if (dp) sbi(PORTD, PD2);	// Add DP if required
193 
	sbi(PORTD, PD3);			// Enable the 4511
122 pfowler 194 
}
195 
 
128 pfowler 196 
void pcInterrupt() {
127 pfowler 197 
		wdt_reset();
122 pfowler 198 
 
128 pfowler 199 
		pcInt.mask = pcInt.current ^ pcInt.last;
200 
		pcInt.last = pcInt.current;
127 pfowler 201 
 
128 pfowler 202 
        if (pcInt.mask == 0)
203 
        	return;
204 
 
127 pfowler 205 
        // Check which pin caused the interrupt. If they both
206 
        //  equal 0 || 1, the pin that interrupted is the direction
128 pfowler 207 
        if (((rbi(pcInt.current, PCINT0) == 1 &&
208 
             rbi(pcInt.current, PCINT1) == 1) ||
209 
             (rbi(pcInt.current, PCINT0) == 0 &&
210 
              rbi(pcInt.current, PCINT1) == 0))) {
211 
              if (rbi(pcInt.mask, PCINT0) ) {
127 pfowler 212 
        		input.outer += 1;
128 pfowler 213 
              } else if (rbi(pcInt.mask, PCINT1) ) {
214 
            	input.outer -= 1;
215 
              }
127 pfowler 216 
 
128 pfowler 217 
        }
127 pfowler 218 
 
128 pfowler 219 
        if (((rbi(pcInt.current, PCINT2) == 1 &&
220 
                rbi(pcInt.current, PCINT3) == 1) ||
221 
                (rbi(pcInt.current, PCINT2) == 0 &&
222 
                 rbi(pcInt.current, PCINT3) == 0))) {
223 
        	if (rbi(pcInt.mask, PCINT2) ) {
127 pfowler 224 
        		input.inner += 1;
128 pfowler 225 
        	} else if (rbi(pcInt.mask, PCINT3) ) {
127 pfowler 226 
        		input.inner -= 1;
128 pfowler 227 
        	}
127 pfowler 228 
        }
128 pfowler 229 
        // Clear the mask so we know we've dealt with it
230 
        pcInt.mask = 0;
127 pfowler 231 
 
232 
}
233 
 
128 pfowler 234 
#ifdef _AVR_ATtiny4313_H_
235 
ISR(PCINT_B_vect) {
236 
#else
237 
ISR(PCINT_vect) {
238 
#endif
239 
	pcInt.current = PINB;
240 
	//doInt = 1;
127 pfowler 241 
}
242 
 
122 pfowler 243 
ISR(TIMER0_OVF_vect) {
128 pfowler 244 
    tmr0_ovf++;
122 pfowler 245 
 
246 
	// Clk/1 TCCR0B = (1<< CS00);
247 
	//20.0Mhz, 1ms = 78ovf
248 
	//16.5Mhz, 1ms = 64ovf
249 
	//16.0Mhz, 1ms = 62ovf
250 
	//12.0Mhz, 1ms = 46ovf
128 pfowler 251 
	// 8.0Mhz, 1ms = 31ovf
252 
    // 8.0Mhz, .5ms = 15ovf, 160r
122 pfowler 253 
 
128 pfowler 254 
	if (tmr0_ovf>=15) {
255 
			systime++;
256 
			tmr0_ovf = 0;
257 
	}
127 pfowler 258 
 
122 pfowler 259 
}