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122 pfowler 1 
#include <avr/io.h>
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#include <avr/wdt.h>
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#include <avr/interrupt.h>
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#include <string.h>
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#include <util/delay.h>
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#include <stdlib.h>
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#include "avrutil.h"
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#include "wire.h"
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#include "lcd.h"
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#include "config.h"
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#include "uart.h"
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#include "lmd.h"
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#ifndef NULL
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#define NULL    ((void *)0)
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#endif
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/* ------------------------------------------------------------------------- */
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#define LCD_SEND_DELAY 80
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#define OLED_SEND_DELAY		500
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#define OLED_LCDWIDTH				128
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#define OLED_LCDHEIGHT				64
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#define UART_BAUD_RATE	9600
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volatile uint8_t lcdTimer = LCD_SEND_DELAY;
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volatile uint16_t oledTimer = OLED_SEND_DELAY;
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volatile uint8_t tmr0_ovf = 0;
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char display[10];
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volatile struct {
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        uint8_t current;
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        uint8_t last;
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        uint8_t mask;
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} pcInt[3];
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volatile struct {
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	int8_t outer;
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	int8_t inner;
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} input;
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volatile uint8_t doInt = 0;
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void pcInterrupt(uint8_t pcint);
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int main(void) {
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  /*
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  DDR : 1 = Output, 0 = Input
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  PORT: 1 = Pullup for Input, otherwise set output
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  PIN : Read input pin
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  */
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  /*
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        PB0     -
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        PB1     -
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        PB2     -
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        PB3     -
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        PB4     -
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        PB5     -
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        PB6     -
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        PB7     -
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  */
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  DDRB          = 0B00000111;
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  PORTB         = 0B00000000;
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  /*
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        PC0     -
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        PC1     -
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        PC2     -
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        PC3     -
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        PC4     -
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        PC5     -
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  */
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  DDRC          = 0B00000000;
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  PORTC         = 0B00001111;
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  /*
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        PD0     -
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        PD1     -
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        PD2     -
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        PD3     -
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        PD4     -
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        PD5     - Input PcInt		- * I/O Interrupt PCINT21
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        PD6     - Output		- * Status LED
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        PD7     - Input, Pullup		- * Button
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  */
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  DDRD          = 0B01000000;
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  PORTD         = 0B10000000;
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  	systime = 0;
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    sysclockInit();
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    uart_init( UART_BAUD_SELECT(UART_BAUD_RATE,F_CPU) );
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    wdt_enable(WDTO_1S);		// Watchdog for 1 sec
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    sei();				// Enable interrupts
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    i2c_master();
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    lcd_init();
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    sbi(PORTD, PD6);
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    _delay_us(100);
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    cbi(PORTD, PD6);
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    lcd_setCursor(0, 1);
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    lcd_print("Time:\0");
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    lmd_init(0x03, PB0, PB1, PB2, 2); // PORTB = 0x03, 5 digits = 0x04
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    // Let the MAX's settle. There's also a 200us delay inside the init
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    _delay_ms(200);
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    uint16_t comm1[2];
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    comm1[0] = 12010;
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    comm1[1] = 12190;
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    input.outer = 0;
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    input.inner = 0;
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    uint8_t c;
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    for (c=0; c<=1; c++) {
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    	lmd_scanlimit(c, 0x04);
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		lmd_decodemode(c, 0xff);
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		lmd_dp(c, 0x04);
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		lmd_print_u16(c, comm1[c]);
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    }
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    //PORTC |= (( 1 << PCINT8 ) | ( 1 << PCINT9 )| ( 1 << PCINT10 )| ( 1 << PCINT11 ));
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    PCMSK1 |= (( 1 << PCINT8 ) | ( 1 << PCINT9 )| ( 1 << PCINT10 )| ( 1 << PCINT11 ));
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    PCICR |= ( 1 << PCIE1 );
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    for(;;){
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    	 wdt_reset();
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    	 if (doInt) {
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    		 doInt = 0;
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    		 pcInterrupt(1);
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    	 }
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		if (!lcdTimer) {
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		  ultoa(systime, display, 10);
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		  lcd_overprint_right(display, 10, 6, 1);
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		  lcdTimer = LCD_SEND_DELAY;
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		}
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		if (!oledTimer && !rbi(PIND, PD7)) {
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			cli();
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			statusLed(ON);
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			//swap_u16(&comm1[0], &comm1[1]);
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			uint16_t t = comm1[1];
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			comm1[1] = comm1[0];
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			comm1[0] = t;
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			_delay_ms(100);
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			statusLed(OFF);
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			sei();
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			oledTimer = OLED_SEND_DELAY;
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			lmd_print_u16(0, comm1[0]);
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			lmd_print_u16(1, comm1[1]);
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			uart_puts("Swap: ");
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			utoa(systime, display, 10);
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			uart_puts(display);
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			uart_puts("\r\n");
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		}
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177 
		if (input.inner != 0 || input.outer != 0) {
178 
 
179 
			int16_t delta = 0;
180 
 
181 
			if (input.inner) {
182 
				delta = (input.inner * 5);
183 
			}
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			if (input.outer) {
185 
				delta = (input.outer * 100);
186 
			}
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	    	input.inner = 0;
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	    	input.outer = 0;
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191 
			comm1[1] += delta;
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			lmd_print_u16(1, comm1[1]);
193 
		}
194 
 
195 
    	_delay_ms(1);
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    }
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    return 0;
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}
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void pcInterrupt(uint8_t pcint) {
204 
		wdt_reset();
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        switch (pcint) {
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                case 1: pcInt[pcint].current = PINC; break;
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        }
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        pcInt[pcint].mask = pcInt[pcint].current ^ pcInt[pcint].last;
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        pcInt[pcint].last = pcInt[pcint].current;
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        if (pcInt[pcint].mask == 0)
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        		return;
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        // Check which pin caused the interrupt. If they both
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        //  equal 0 || 1, the pin that interrupted is the direction
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        if ((
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        	(rbi(pcInt[pcint].current, PCINT8) == 1 &&
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             rbi(pcInt[pcint].current, PCINT9) == 1) ||
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             (rbi(pcInt[pcint].current, PCINT8) == 0 &&
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              rbi(pcInt[pcint].current, PCINT9) == 0)) &&
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            rbi(pcInt[pcint].mask, PCINT8) ) {
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223 
        		input.outer += 1;
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        } else if ((
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        		(rbi(pcInt[pcint].current, PCINT8) == 1 &&
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                 rbi(pcInt[pcint].current, PCINT9) == 1) ||
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                (rbi(pcInt[pcint].current, PCINT8) == 0 &&
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                 rbi(pcInt[pcint].current, PCINT9) == 0)) &&
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               rbi(pcInt[pcint].mask, PCINT9) ) {
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231 
        		input.outer -= 1;
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        } else if ((
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        		(rbi(pcInt[pcint].current, PCINT10) == 1 &&
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                rbi(pcInt[pcint].current, PCINT11) == 1) ||
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                (rbi(pcInt[pcint].current, PCINT10) == 0 &&
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                 rbi(pcInt[pcint].current, PCINT11) == 0)) &&
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               rbi(pcInt[pcint].mask, PCINT10) ) {
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239 
        		input.inner += 1;
240 
        } else if ((
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        		(rbi(pcInt[pcint].current, PCINT10) == 1 &&
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        		 rbi(pcInt[pcint].current, PCINT11) == 1) ||
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        			(rbi(pcInt[pcint].current, PCINT10) == 0 &&
244 
        			 rbi(pcInt[pcint].current, PCINT11) == 0)) &&
245 
                   rbi(pcInt[pcint].mask, PCINT11) ) {
246 
 
247 
        		input.inner -= 1;
248 
        }
249 
 
250 
        // Clear the mask so we know we've delth with it
251 
        pcInt[pcint].mask = 0;
252 
 
253 
}
254 
 
255 
ISR(PCINT0_vect) {
256 
	doInt = 1;
257 
}
258 
ISR(PCINT1_vect) {
259 
	doInt = 1;
260 
}
261 
ISR(PCINT2_vect) {
262 
	doInt = 1;
263 
}
264 
 
265 
 
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ISR(TIMER0_OVF_vect) {
267 
        tmr0_ovf++;
268 
 
269 
	// Clk/1 TCCR0B = (1<< CS00);
270 
	//20.0Mhz, 1ms = 78ovf
271 
	//16.5Mhz, 1ms = 64ovf
272 
	//16.0Mhz, 1ms = 62ovf
273 
	//12.0Mhz, 1ms = 46ovf
274 
 
275 
        if (tmr0_ovf>=64) {
276 
                systime++;
277 
                tmr0_ovf = 0;
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279 
			if (lcdTimer)
280 
				lcdTimer--;
281 
 
282 
			if (oledTimer)
283 
				oledTimer--;
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        }
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}