diff options
Diffstat (limited to 'ferment.c')
| -rw-r--r-- | ferment.c | 74 |
1 files changed, 66 insertions, 8 deletions
@@ -1,4 +1,4 @@ -#define F_CPU 1000000UL +//#define F_CPU 7372800UL #include <stdint.h> #include <string.h> #include <avr/io.h> @@ -8,6 +8,10 @@ #include <avr/eeprom.h> #include <util/delay.h> +#include "serial.h" +#include "stdio.h" +#include "pid.h" + /* port D * * 4 1- (NMOS, inverted) @@ -22,6 +26,12 @@ #define D_2_MINUS (1 << 6) #define D_2_PLUS (1 << 7) +const int target_temp = 30; +volatile uint16_t adc_res; +volatile uint8_t adc_new; + +struct PID_DATA pid_data; + /* Turns the H-bridge off, putting the output * into high impedance mode. */ static void bridge_off(void) @@ -55,15 +65,63 @@ static void bridge_init(void) DDRD |= D_1_PLUS | D_1_MINUS | D_2_PLUS | D_2_MINUS; } -int main() +/* initializes ADC */ +static void adc_init(void) +{ + adc_new = 0; + ADMUX = (1 << REFS1) | (1 << REFS0); + /* select channel x (0 for now) */ + ADMUX |= 0x0; + ADCSRA = (1 << ADEN) | (1 << ADIE) | (1 << ADPS2) | (1 << ADPS1) | (1 << ADPS0); +} + +/* reads ADC */ +static void start_temp_conv(void) +{ + ADCSRA |= (1<<ADSC); +} + +/* ADC completion interrupt */ +ISR(ADC_vect) +{ + adc_res = ADCW; + adc_new = 1; +} + +/* ADC results to temperature conversion routine */ +int adc_to_centigrade(uint16_t adc_val) { + return 0; +} + +/* Initializes TIMER1 */ +static void timer_init(void) +{ + TCCR1B = (1 << WGM12) | (1 << CS11); + OCR1A = 1000; + TIMSK|=(1<<OCIE1A); +} + +ISR(TIMER1_COMPA_vect) +{ + serial_send("*\n", 2, 1); + start_temp_conv(); +} + +int main(void) { + char params[12]; + + serial_init(); + adc_init(); + timer_init(); bridge_init(); - /* simple demo, just flips polarity every now and then */ + + sei(); + while (1) { - bridge_on_a(); - _delay_ms(200); - bridge_on_b(); - _delay_ms(200); + sprintf(params, "%u\n", adc_res); + serial_send(params, strlen(params), 1); + //bridge_on_a(); + _delay_ms(1000); } } - |