diff options
| -rw-r--r-- | .gitignore | 6 | ||||
| -rw-r--r-- | Makefile | 41 | ||||
| -rw-r--r-- | ferment.c | 69 |
3 files changed, 116 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..6769eb2 --- /dev/null +++ b/.gitignore @@ -0,0 +1,6 @@ +*.o +*.flash +*.eeprom +*.map +*.orig +*.?#? diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..b7690cd --- /dev/null +++ b/Makefile @@ -0,0 +1,41 @@ +MCU=atmega32 +AVRDUDE=avrdude +ACC=avr-gcc +AOBJCOPY=avr-objcopy +ALD=avr-ld +ASIZE=avr-size +CFLAGS=-Wall -Wextra -Wno-unused-parameter -pedantic -std=c99 + +ACFLAGS=-g -mmcu=$(MCU) $(CFLAGS) $(DPIN) -Os -mcall-prologues +# ALDFLAGS=-L/usr/avr/lib/avr4 -L/usr/lib/binutils/avr/2.18 +LD=gcc +CC=gcc +CXX=g++ -g +LDXX=g++ -g + +love: ferment.flash ferment.eeprom + +%.flash: %.ld.o + $(AOBJCOPY) -O binary $< $@ + +%.eeprom: %.ld.o + $(AOBJCOPY) -j .eeprom -O binary $^ $@ + +%.ld.o: %.o + $(ACC) $(ACFLAGS) $(ALDFLAGS) -Wl,-Map,$(patsubst %.ld.o,%.map,$@) -o $@ $< + @$(ASIZE) $@ + +%.o: %.c + $(ACC) $(ACFLAGS) -c -o $@ $< + +flash: ferment.flash + $(AVRDUDE) -y -p m32 -E noreset -U flash:w:$<:r +eeprom: ferment.eeprom + $(AVRDUDE) -y -p m32 -E noreset -U eeprom:w:$<:r + +clean: + rm -f *.flash *.eeprom *.o + +.PHONY: love flash eeprom clean +.SECONDARY: + diff --git a/ferment.c b/ferment.c new file mode 100644 index 0000000..aba1916 --- /dev/null +++ b/ferment.c @@ -0,0 +1,69 @@ +#define F_CPU 1000000UL +#include <stdint.h> +#include <string.h> +#include <avr/io.h> +#include <avr/interrupt.h> +#include <avr/sleep.h> +#include <avr/pgmspace.h> +#include <avr/eeprom.h> +#include <util/delay.h> + +/* port D + * + * 4 1- (NMOS, inverted) + * 5 1+ (PMOS) + * 6 2- (NMOS, inverted) + * 7 2+ (PMOS) + * + */ + +#define D_1_MINUS (1 << 4) +#define D_1_PLUS (1 << 5) +#define D_2_MINUS (1 << 6) +#define D_2_PLUS (1 << 7) + +/* Turns the H-bridge off, putting the output + * into high impedance mode. */ +static void bridge_off(void) +{ + PORTD |= D_1_MINUS | D_2_MINUS; + PORTD &= ~(D_1_PLUS | D_2_PLUS); +} + +/* Turns the H-bridge on, setting 1+ 2- */ +static void bridge_on_a(void) +{ + bridge_off(); + _delay_ms(100); + PORTD |= D_1_PLUS; + PORTD &= ~D_2_MINUS; +} + +/* Turns the H-bridge on, setting 1- 2+ */ +static void bridge_on_b(void) +{ + bridge_off(); + _delay_ms(100); + PORTD |= D_2_PLUS; + PORTD &= ~D_1_MINUS; +} + +/* Initializes the output port needed for the H-bridge */ +static void bridge_init(void) +{ + bridge_off(); + DDRD |= D_1_PLUS | D_1_MINUS | D_2_PLUS | D_2_MINUS; +} + +int main() +{ + bridge_init(); + /* simple demo, just flips polarity every now and then */ + while (1) { + bridge_on_a(); + _delay_ms(200); + bridge_on_b(); + _delay_ms(200); + } +} + |