Fix timers in main program too

Makefile

@@ -1,6 +1,40 @@
-ARCH = avr
+PROG = main
+
+MCU = attiny84
+
+CC = avr-gcc
+CFLAGS += -mmcu=$(MCU)
+CFLAGS += -Os
+CFLAGS += -w
+
+LDFLAGS += -mmcu=$(MCU)
+
+AVDFLAGS += -p $(MCU)
+AVDFLAGS += -c usbtiny
+
+CLOCK_HZ = 16000000
+FUSES += -U lfuse:w:0xff:m
+FUSES += -U hfuse:w:0xd9:m
+FUSES += -U efuse:w:0xff:m
+
+
+upload: .upload
+
+.upload: $(PROG).hex
+	avrdude $(AVDFLAGS) -U flash:w:$<
+	touch $@
+
+fuses:
+	avrdude $(AVDFLAGS) $(FUSES)
+	
+main: main.o avr.o
+
+$(PROG).hex: $(PROG)
+	avr-objcopy -O ihex -R .eeprom -R .fuse -R .lock -R .signature $< $@
+
+clean:
+	rm -f $(PROG) *.o *.hex .upload
+
 
-CFLAGS += -DARCH=$(ARCH)
 
-include Makefile.$(ARCH)
 	

Makefile.avr

@@ -1,42 +0,0 @@
-PROG = main
-
-MCU = attiny84
-
-CC = avr-gcc
-CFLAGS += -mmcu=$(MCU)
-CFLAGS += -Os
-CFLAGS += -w
-
-LDFLAGS += -mmcu=$(MCU)
-
-AVDFLAGS += -p $(MCU)
-AVDFLAGS += -c usbtiny
-
-FUSES += -U lfuse:w:0xff:m
-FUSES += -U hfuse:w:0xd9:m
-FUSES += -U efuse:w:0xff:m
-
-
-upload: .upload
-
-.upload: $(PROG).hex
-	avrdude $(AVDFLAGS) -U flash:w:$<
-	touch $@
-
-fuses:
-	avrdude $(AVDFLAGS) $(FUSES)
-
-$(PROG).hex: $(PROG)
-	avr-objcopy -O ihex -R .eeprom -R .fuse -R .lock -R .signature $< $@
-
-main: main.o avr.o
-
-#main.o: avr.h
-#avr.o: avr.h
-
-clean:
-	rm -f $(PROG) *.o *.hex .upload
-
-
-
-	

Makefile.ti

@@ -1,17 +0,0 @@
-CC = msp430-gcc
-LDFLAGS += -mmcu=msp430g2553
-CFLAGS += -mmcu=msp430g2553
-CFLAGS += -Wall
-CFLAGS += -Os
-CFLAGS += -w
-
-upload: .upload
-
-.upload: main
-	mspdebug rf2500 "prog $<"
-	touch $@
-
-main: main.o ti.o
-
-clean:
-	rm -f main *.o .upload

avr.c

@@ -4,49 +4,39 @@
 #include <avr/interrupt.h>
 #include "avr.h"
 
+/* This only works out for a 16MHz or 8MHz clock */
+#define CLOCK_HZ 16000000
+#define TICKS_PER_SECOND (CLOCK_HZ / 256)
+#define TICKS_PER_JIFFY (TICKS_PER_SECOND / 10)
+
 #define cbi(byt, bit)   (byt &= ~_BV(bit))
 #define sbi(byt, bit)   (byt |= _BV(bit))
 
 extern volatile bool tick;
 extern volatile uint32_t jiffies;
 
-// Count microseconds
+// Interrupt called every jiffy
-volatile uint32_t micros = 0;
+ISR(TIM1_COMPA_vect)
-
-// Interrupt called every 256 * 64 microseconds
-ISR(TIM0_OVF_vect)
 {
-	uint32_t m = micros;
-	
-	m += (256 * 64);
-	if (m >= JIFFY_uS) {
-		m -= JIFFY_uS;
-		tick = true;
 	jiffies += 1;
-	}
+	tick = true;
-	micros = m;
 }
 
-
 void
 init(void)
 {
-	// Set prescaler to 16, so we get clock ticks at exactly 1MHz
+	int i;
-	CLKPR = _BV(CLKPCE);
-	CLKPR = 0x04;
-
-	// Set timer 0 interrupt clock divider to 64
-	TCCR0B = _BV(CS01) + _BV(CS00);
-
-	// enable timer 0 overflow interrupt
-	TIMSK0 |= _BV(TOIE0);    //enable compare match interrupt;
-	
-	// Enable interrupts
-	sei();
 
 	DDRA = ~(_BV(NESOUT));
 	DDRB = 0xff;
 
-	PORTA = 0;
+	TCCR1A = 0;
-	PORTB = 0xff;
+	TCCR1B = 0;
+	TCNT1 = 0;
+	OCR1A = TICKS_PER_JIFFY - 1;
+	TCCR1B |= (1 << WGM12);
+	TCCR1B |= (1 << CS12);
+	TIMSK1 |= (1 << OCIE1A);
+
+	sei();
 }

main.c

@@ -5,11 +5,7 @@
 #include <avr/io.h>
 #include <util/delay.h>
 
-#if ARCH == avr
+#include "avr.h"
-#  include "avr.h"
-#else
-#  include "ti.h"
-#endif
 
 // Number of shift registers in your scoreboard
 // If you want scores to go over 199, you need 8
@@ -19,9 +15,16 @@ const int nsr = 6;
 // Timing stuff
 // 
 
-volatile uint32_t jiffies = 0;
+// 
+// 2**32 deciseconds = 13.610221 years
+// 
+// As long as you unplug your scoreboard once every 10 years or so,
+// you're good.
+// 
+volatile uint32_t jiffies = 0;	// Elapsed time in deciseconds
 volatile bool tick = false;	// Set high when jiffy clock ticks
 
+
 // Clocks are in deciseconds
 uint16_t score_a = 0;
 uint16_t score_b = 0;
@@ -108,7 +111,7 @@ draw()
 {
 	uint16_t clk;
 
-	//XXX testing
+	// XXX testing
 
 
 	write_num(score_b, 2);
@@ -223,7 +226,7 @@ setup()
 {
 	int i;
 
-	// Datasheet says you have to do this before DC initialization.
+	// TLC5941 datasheet says you have to do this before DC initialization.
 	// In practice it doesn't seem to matter, but what the hey.
 	draw();
 
@@ -247,10 +250,11 @@ loop()
 
 		update_controller();
 		
-		if (jiffies % 66 == 0) {
+		if (jiffies % 10 == 0) {
 			PORTB ^= 0xff;
 		}
-		if (jiffies % (JIFFIES_PER_SECOND / 10) == 0) {
+
+		if (jiffies == 0) {
 			switch (state) {
 				case SETUP:
 					break;
@@ -281,6 +285,3 @@ main(void)
 	}
 	return 0;
 }
-
-
-

ti.c

@@ -1,34 +0,0 @@
-#include <stdbool.h>
-#include <stdint.h>
-#include "ti.h"
-
-extern volatile bool tick;
-extern volatile uint32_t jiffies;
-
-// Count microseconds
-volatile uint32_t micros = 0;
-
-// Interrupt called every 1024 µs
-__attribute__((interrupt(TIMER0_A0_VECTOR)))
-void
-timer_a(void)
-{
-	tick = true;
-	jiffies += 1;
-}
-
-
-
-void
-init()
-{
-	WDTCTL = WDTPW + WDTHOLD;	// Disable Watchdog Timer
-	P1DIR = ~(_BV(NESOUT));
-	P1OUT = 0;
-
-	CCTL0 |= CCIE;		// Trigger interrupt on A checkpoint
-	TACTL = TASSEL_2 + MC_1;	// Set timer A to SMCLCK, up mode
-	TACCR0 = 0x4444;	// Interrupt 60 times per second
-
-	__enable_interrupt();
-}

ti.h

@@ -1,28 +0,0 @@
-#ifndef TI_H
-#define TI_H
-
-#include <stdint.h>
-#include <msp430.h>
-
-#define _BV(x) (1 << x)
-
-#define JIFFIES_PER_SECOND 60
-
-#define bit(pin, bit, on) pin = (on ? (pin | bit) : (pin & ~bit))
-
-#define mode(on) bit(P1OUT, _BV(0), on)
-#define sin(on) bit(P1OUT, _BV(1), on)
-#define sclk(on) bit(P1OUT, _BV(2), on)
-#define xlat(on) bit(P1OUT, _BV(3), on)
-// Connect GSCLK to SCLK
-// Connect BLANK to XLAT
-// TRUST ME, THIS TOTALLY WORKS
-
-#define NESOUT 6
-#define nesclk(on) bit(P1OUT, _BV(4), on)
-#define nesltch(on) bit(P1OUT, _BV(5), on)
-#define nesout() ((P1IN & _BV(NESOUT)) << NESOUT)
-
-void init();
-
-#endif