stupid network

[HokieGeek]

http://www.adnbr.co.uk/articles/adc-and-pwm-basics https://gist.github.com/adnbr/9289235 https://arduinodiy.wordpress.com/2015/06/22/flashing-an-led-with-attiny13/ http://www.avrfreaks.net/forum/please-big-help-attiny13-adc

Reuse these: https://github.com/HokieGeek/power-supply-voltage-selector/blob/master/spi.h https://github.com/HokieGeek/power-supply-voltage-selector/blob/master/spi.c

[HokieGeek]

#include <avr/interrupt.h>
#include <avr/sleep.h>

// #include "spi.h"
// #include "led-patterns.h"

#define VIBRATOR_PIN PB0

#define LEDS_PIN_DATA PB1
#define LEDS_PIN_SERIALCLOCK PB2
#define LEDS_PIN_CHIPSELECT PB3

#define PHOTOCELL_PIN PB4

// #define PHOTOCELL_ACTIVATE_THRESHOLD 80
// #define VIBRATE_PULSE 50

// SpiDevice *leds;

ISR(WDT_vect) {
    // Nothing to do. Just wake up
}

int read_photocell() {
    ADCSRA |= (1 << ADSC); // Start the conversion

    while (ADCSRA & (1 << ADSC)); // Wait for conversion

    return ADC;
}

int vibrate(int pulse) {
    OCR0A = pulse;
}

void analyze_and_activate() {
    /*
    if (read_photocell() < PHOTOCELL_ACTIVATE_THRESHOLD) {
        // TODO: vibrate(VIBRATE_PULSE);
        // TODO: Apply an animation
        // TODO: Turn on all leds
    } else {
        // TODO: Turn off all leds
    }
    */
    vibrate(read_photocell()); // This is strictly for testing
}

void init_pins() {
    // Vibrator
    TCCR0B |= (1 << CS01); // clock/8 (See 11-9)
    TCCR0A |= (1 << WGM01) | (1 << WGM00); // Set for fast PWM with 0xFF Max (See 11-8)
    TCCR0A |= (1 << COM0A1); // Clear on compare match (See 11-5)

    DDRB |= (1 << VIBRATOR_PIN);

    // The LEDS
    /*
    leds = Init3WireSpiDevice(LEDS_PIN_CHIPSELECT, 
                              LEDS_PIN_SERIALCLOCK, 
                              LEDS_PIN_DATA); 
    */

    // The photocell ADC. Enable ADC2 / PB4 as an ADC pin
    ADMUX |= (0 << REFS0) | (1 << MUX1) | (0 << MUX0);
    ADCSRA |= (1 << ADPS1) | (1 << ADPS0) | (1 << ADEN); // Enable ADC and set prescaler to clock/128
}

void init_interrupts() {
    cli(); // JIC

    // See table 8-2 on datasheet
    // WDTCR |= (1 << WDP2) | (1 << WDP1) | (1 << WDP0); // Sleep for ~2s
    WDTCR |= (1 << WDP2) | (1 << WDP1); // Sleep for ~1s
    // WDTCR |= (1 << WDP2) | (1 << WDP0); // Sleep for ~30s
    // WDTCR |= (1 << WDP2); // Sleep for ~15s
    WDTCR |= (1 << WDTIE) | (0 << WDE); // Enable watchdog timer
    WDTCR |= (0 << WDE);

    sei();

    set_sleep_mode(SLEEP_MODE_PWR_DOWN);
    sleep_enable();
}

int main(void) {
    init_pins();
    // init_interrupts();

    // TODO: Read from light sensor (ADC)
    // TODO: Do the vibrator (PWM)
    // TODO: Control the LEDs (SPI)
    // TODO: go to sleep for 30 seconds

    for (;;) {
        // ADCSRA &= ~(1 << ADEN);  // Disable ADC
        // sleep_mode();

        // ADCSRA |= (1 << ADEN);  // Enable ADC
        analyze_and_activate();
    }
}

[HokieGeek]

prog=main
chip=t13
cpu_freq=
programmer=usbtiny
port=usb
CC=avr-gcc
CFLAGS=-funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -Wall -Wstrict-prototypes

DEPS = 
OBJ = $(prog).o $(DEPS:.h=.o)

all: $(prog).eep $(prog).lss $(prog).sym 

%.o: %.c $(DEPS)
    @echo "== Compiling object file: $@" && \
    $(CC) -c -mdeb -mmcu=$(chip) -I. -gdwarf-2 $(cpu_freq) -Os $(CFLAGS) -Wa,-adhlns=./$@.lst -std=gnu99 $< -o $@ || true

$(prog).eep: $(prog).elf
    @echo "== Creating load file for EEPROM" && \
    avr-objcopy -j .eeprom --set-section-flags=.eeprom="alloc,load" --change-section-lma .eeprom=0 --no-change-warnings -O ihex $< $@

$(prog).lss: $(prog).elf
    @echo "== Creating Extended Listing" && \
    avr-objdump -h -S -z $< > $@

$(prog).sym: $(prog).elf
    @echo "== Creating Symbol Table" && \
    avr-nm -n $< > $@

$(prog).elf: $(prog).hex
    @echo "== Creating load file for Flash" && \
    avr-objcopy -O ihex -R .eeprom -R .fuse -R .lock -R .signature $@ $^

$(prog).hex: $(OBJ)
    @echo "== Creating hex" && \
    $(CC) -mmcu=$(chip) -I. -mdeb -gdwarf-2 $(cpu_freq) -Os $(CFLAGS) -Wa,-adhlns=$<  -std=gnu99 -MMD -MP -MF .dep/$(prog).elf.d $^ --output $(prog).elf -Wl,-Map=$(prog).map,--cref -lm

upload: all
    @echo "== Uploading to chip"
    sudo avrdude -p $(chip) -P $(port) -c $(programmer) -U flash:w:$(prog).hex

clean:
    rm -rf *.{eep,elf,hex,lss,lst,map,o,sym}

.PHONY: all upload clean