First test of keypad software - the LEDs work.

software/keypad/Makefile

@@ -0,0 +1,102 @@
+PRG            = uart_hello
+OBJ            = main.o
+PROGRAMMER     = buspirate
+PORT           = /dev/ttyACM0
+MCU_TARGET     = atmega8
+AVRDUDE_TARGET = atmega8
+OPTIMIZE       = -Os
+DEFS           =
+LIBS           =
+
+HZ          = 20000000
+
+# You should not have to change anything below here.
+
+CC             = avr-gcc
+
+# Override is only needed by avr-lib build system.
+
+override CFLAGS        = -g -DF_CPU=$(HZ) -Wall $(OPTIMIZE) -mmcu=$(MCU_TARGET) $(DEFS)
+override LDFLAGS       = -Wl,-Map,$(PRG).map
+
+OBJCOPY        = avr-objcopy
+OBJDUMP        = avr-objdump
+
+all: $(PRG).elf lst text #eeprom
+
+$(PRG).elf: $(OBJ)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)
+
+clean:
+	rm -rf *.o $(PRG).elf *.eps *.png *.pdf *.bak *.hex *.bin *.srec
+	rm -rf *.lst *.map $(EXTRA_CLEAN_FILES)
+
+lst:  $(PRG).lst
+
+%.lst: %.elf
+	$(OBJDUMP) -h -S $< > $@
+
+# Rules for building the .text rom images
+
+text: hex bin srec
+
+hex:  $(PRG).hex
+bin:  $(PRG).bin
+srec: $(PRG).srec
+
+%.hex: %.elf
+	$(OBJCOPY) -j .text -j .data -O ihex $< $@
+
+%.srec: %.elf
+	$(OBJCOPY) -j .text -j .data -O srec $< $@
+
+%.bin: %.elf
+	$(OBJCOPY) -j .text -j .data -O binary $< $@
+
+# Rules for building the .eeprom rom images
+
+eeprom: ehex ebin esrec
+
+
+ehex:  $(PRG)_eeprom.hex
+#ebin:  $(PRG)_eeprom.bin
+esrec: $(PRG)_eeprom.srec
+
+%_eeprom.hex: %.elf
+	$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O ihex $< $@
+
+#%_eeprom.srec: %.elf
+#	$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O srec $< $@
+
+%_eeprom.bin: %.elf
+	$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O binary $< $@
+
+
+# command to program chip (invoked by running "make install")
+install:  $(PRG).hex
+	avrdude -p $(AVRDUDE_TARGET) -c $(PROGRAMMER) -P $(PORT) -v  \
+         -U flash:w:$(PRG).hex 
+	# hack: turn on the buspirate PSU
+	echo -e "m5\n\n\n\n\n\n\n\nW" > /dev/ttyACM0
+
+fuse:
+	avrdude -p $(AVRDUDE_TARGET) -c $(PROGRAMMER) -P $(PORT) -v \
+	-U lfuse:w:0xc6:m -U hfuse:w:0xd9:m 	
+
+ddd: gdbinit
+	ddd --debugger "avr-gdb -x $(GDBINITFILE)"
+
+gdbserver: gdbinit
+	simulavr --device $(MCU_TARGET) --gdbserver
+
+gdbinit: $(GDBINITFILE)
+
+$(GDBINITFILE): $(PRG).hex
+	@echo "file $(PRG).elf" > $(GDBINITFILE)
+
+	@echo "target remote localhost:1212" >> $(GDBINITFILE)
+	@echo "load"                         >> $(GDBINITFILE)
+	@echo "break main"                   >> $(GDBINITFILE)
+	@echo
+	@echo "Use 'avr-gdb -x $(GDBINITFILE)'"
+

software/keypad/main.c

@@ -0,0 +1,59 @@
+#include <avr/io.h>
+#include <avr/wdt.h>
+#include <avr/interrupt.h>
+
+/////////////////////
+// I/O ports setup //
+/////////////////////
+
+typedef struct
+{
+    volatile uint8_t *DDR;
+    volatile uint8_t *PORT;
+    volatile uint8_t *PIN;
+    uint8_t Bitmap;
+} TIOPort;
+
+#define DECLARE_IO(name, port, bit) TIOPort g_IO_##name = { &DDR##port, &PORT##port, &PIN##port, (1 << bit) }
+#define IO_SET_OUTPUT(name) do { *g_IO_##name.DDR |= g_IO_##name.Bitmap; } while(0)
+#define IO_SET_INPUT(name) do { *g_IO_##name.DDR &= ~g_IO_##name.Bitmap; } while(0)
+#define IO_INPUT_PULLUP(name) do { *g_IO_##name.PORT |= g_IO_##name.Bitmap; } while(0)
+
+#define IO_OUT(name, value) do { if (value) \
+        *g_IO_##name.PORT |= g_IO_##name.Bitmap; \
+    else \
+        *g_IO_##name.PORT &= ~g_IO_##name.Bitmap; } while(0)
+#define IO_TOGGLE(name) do { *g_IO_##name.PORT ^= g_IO_##name.Bitmap; } while(0)
+#define IO_IN(name) (*g_IO_##name.PIN & g_IO_##name.Bitmap)
+
+// Buzzer on PC2
+DECLARE_IO(BUZZER, C, 2);
+// Red LED pn PC1
+DECLARE_IO(LED_RED, C, 1);
+// Green LED on PC0
+DECLARE_IO(LED_GREEN, C, 0);
+
+// Keypad
+DECLARE_IO(KPAD_COL3, D, 0);
+DECLARE_IO(KAPD_ROW3, D, 1);
+DECLARE_IO(KPAD_COMMON, D, 2);
+DECLARE_IO(KPAD_COL2, D, 3);
+DECLARE_IO(KPAD_ROW1, D, 4);
+DECLARE_IO(KPAD_ROW2, D, 5);
+DECLARE_IO(KPAD_ROW4, D, 6);
+DECLARE_IO(KPAD_COL1, D, 7);
+
+
+int main (void)
+{
+    // Setup outputs
+    IO_SET_OUTPUT(BUZZER);
+    IO_SET_OUTPUT(LED_RED);
+    IO_SET_OUTPUT(LED_GREEN);
+
+    IO_OUT(LED_GREEN, 1);
+    IO_OUT(LED_RED, 1);
+
+    for (;;) {}
+    return 0;
+}