Add TI support back in

Makefile

@@ -1,31 +1,4 @@
-PROG = main
+ARCH = ti
 
-CC = avr-gcc
+include Makefile.$(ARCH)
-CFLAGS += -mmcu=atmega328p
-CFLAGS += -DF_CPU=16000000UL
-CFLAGS += -Os
-CFLAGS += -w
 
-AVDFLAGS += -p m328p
-AVDFLAGS += -c arduino
-AVDFLAGS += -b 115200
-AVDFLAGS += -P /dev/ttyACM0
-
-
-upload: .upload
-
-.upload: $(PROG).hex
-	avrdude $(AVDFLAGS) -U flash:w:$<
-	touch $@
-
-$(PROG).hex: $(PROG)
-	avr-objcopy -O ihex -R .eeprom -R .fuse -R .lock -R .signature $< $@
-
-main: main.o avr.o
-
-clean:
-	rm -f $(PROG) *.hex .upload
-
-
-
-	

Makefile.avr

@@ -0,0 +1,31 @@
+PROG = main
+
+CC = avr-gcc
+CFLAGS += -mmcu=atmega328p
+CFLAGS += -DF_CPU=16000000UL
+CFLAGS += -Os
+CFLAGS += -w
+
+AVDFLAGS += -p m328p
+AVDFLAGS += -c arduino
+AVDFLAGS += -b 115200
+AVDFLAGS += -P /dev/ttyACM0
+
+
+upload: .upload
+
+.upload: $(PROG).hex
+	avrdude $(AVDFLAGS) -U flash:w:$<
+	touch $@
+
+$(PROG).hex: $(PROG)
+	avr-objcopy -O ihex -R .eeprom -R .fuse -R .lock -R .signature $< $@
+
+main: main.o avr.o
+
+clean:
+	rm -f $(PROG) *.hex .upload
+
+
+
+	

Makefile.ti

@@ -0,0 +1,17 @@
+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

@@ -0,0 +1,60 @@
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include "avr.h"
+
+#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
+volatile uint32_t micros = 0;
+
+// Interrupt called every 1024 µs
+SIGNAL(TIMER0_OVF_vect)
+{
+	uint32_t m = micros;
+	
+	m += 1024;
+	if (m >= JIFFY_uS) {
+		m %= JIFFY_uS;
+		tick = true;
+		jiffies += 1;
+	}
+	micros = m;
+}
+
+
+#define mode(on) bit(PORTD, _BV(0), on)
+#define sin(on) bit(PORTD, _BV(1), on)
+#define sclk(on) bit(PORTD, _BV(2), on)
+#define xlat(on) bit(PORTD, _BV(3), on)
+// Connect GSCLK to SCLK
+// Connect BLANK to XLAT
+// TRUST ME, THIS TOTALLY WORKS
+
+#define nesclk(on) bit(PORTD, _BV(4), on)
+#define nesltch(on) bit(PORTD, _BV(5), on)
+#define nesout() ((PIND & _BV(6)) << 6)
+
+void
+init(void)
+{
+	// Set timer 0 interrupt clock divider to 64
+	TCCR0B = 0x03;
+
+	// enable timer 0 overflow interrupt
+	TIMSK0 = 0x01;
+	
+	// Enable interrupts
+	sei();
+
+	DDRD = ~(_BV(NESOUT));
+	DDRB = 0xff;
+
+	PORTD = 0;
+	
+}

avr.h

@@ -0,0 +1,27 @@
+#ifndef AVR_H
+#define AVR_H
+
+#include <stdint.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+// Make sure JIFFY_uS is going to be an integer and not a float!
+#define JIFFIES_PER_SECOND 50
+#define JIFFY_uS (1000000 / JIFFIES_PER_SECOND)
+
+#define mode(on) bit(PORTD, _BV(0), on)
+#define sin(on) bit(PORTD, _BV(1), on)
+#define sclk(on) bit(PORTD, _BV(2), on)
+#define xlat(on) bit(PORTD, _BV(3), on)
+// Connect GSCLK to SCLK
+// Connect BLANK to XLAT
+// TRUST ME, THIS TOTALLY WORKS
+
+#define NESOUT 6
+#define nesclk(on) bit(PORTD, _BV(4), on)
+#define nesltch(on) bit(PORTD, _BV(5), on)
+#define nesout() ((PIND & _BV(NESOUT)) << NESOUT)
+
+void init(void);
+
+#endif

main.c

@@ -1,7 +1,7 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include <stdbool.h>
-#include "avr.h"
+#include "ti.h"
 
 // Number of shift registers in your scoreboard
 // If you want scores to go over 199, you need 8

ti.c

@@ -0,0 +1,34 @@
+#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

@@ -0,0 +1,26 @@
+#ifndef TI_H
+#define TI_H
+
+#include <stdint.h>
+#include <msp430.h>
+
+#define _BV(x) (1 << x)
+
+#define JIFFIES_PER_SECOND 60
+
+#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