/// Set up temp sensors.
void temp_init() {
temp_sensor_t i;
for (i = 0; i < NUM_TEMP_SENSORS; i++) {
switch(temp_sensors[i].temp_type) {
#ifdef TEMP_MAX6675
case TT_MAX6675:
WRITE(SS, 1); // Turn sensor off.
SET_OUTPUT(SS);
// Intentionally no break, we might have more than one sensor type.
#endif
#ifdef TEMP_THERMISTOR
// handled by analog_init()
/* case TT_THERMISTOR:
break;*/
#endif
#ifdef TEMP_AD595
// handled by analog_init()
/* case TT_AD595:
break;*/
#endif
#ifdef TEMP_INTERCOM
case TT_INTERCOM:
// Enable the RS485 transceiver
SET_OUTPUT(RX_ENABLE_PIN);
SET_OUTPUT(TX_ENABLE_PIN);
WRITE(RX_ENABLE_PIN,0);
disable_transmit();
intercom_init();
send_temperature(0, 0);
// Intentionally no break.
#endif
default: /* prevent compiler warning */
break;
}
}
}
/// initialise all I/O - set pins as input or output, turn off unused subsystems, etc
void io_init(void) {
// disable modules we don't use
#ifdef PRR
PRR = MASK(PRTWI) | MASK(PRADC) | MASK(PRSPI);
#elif defined PRR0
PRR0 = MASK(PRTWI) | MASK(PRADC) | MASK(PRSPI);
#if defined(PRUSART3)
// don't use USART2 or USART3- leave USART1 for GEN3 and derivatives
PRR1 |= MASK(PRUSART3) | MASK(PRUSART2);
#endif
#if defined(PRUSART2)
// don't use USART2 or USART3- leave USART1 for GEN3 and derivatives
PRR1 |= MASK(PRUSART2);
#endif
#endif
ACSR = MASK(ACD);
// setup I/O pins
// X Stepper
//WRITE(X_STEP_PIN, 0); SET_OUTPUT(X_STEP_PIN);
//WRITE(X_DIR_PIN, 0); SET_OUTPUT(X_DIR_PIN);
#ifdef X_MIN_PIN
SET_INPUT(X_MIN_PIN);
WRITE(X_MIN_PIN, 0); // pullup resistors off
#endif
#ifdef X_MAX_PIN
SET_INPUT(X_MAX_PIN);
WRITE(X_MAX_PIN, 0); // pullup resistors off
#endif
// Y Stepper
//WRITE(Y_STEP_PIN, 0); SET_OUTPUT(Y_STEP_PIN);
//WRITE(Y_DIR_PIN, 0); SET_OUTPUT(Y_DIR_PIN);
#ifdef Y_MIN_PIN
SET_INPUT(Y_MIN_PIN);
WRITE(Y_MIN_PIN, 0); // pullup resistors off
#endif
#ifdef Y_MAX_PIN
SET_INPUT(Y_MAX_PIN);
WRITE(Y_MAX_PIN, 0); // pullup resistors off
#endif
// Z Stepper
#if defined Z_STEP_PIN && defined Z_DIR_PIN
WRITE(Z_STEP_PIN, 0); SET_OUTPUT(Z_STEP_PIN);
WRITE(Z_DIR_PIN, 0); SET_OUTPUT(Z_DIR_PIN);
#endif
#ifdef Z_MIN_PIN
SET_INPUT(Z_MIN_PIN);
WRITE(Z_MIN_PIN, 0); // pullup resistors off
#endif
#ifdef Z_MAX_PIN
SET_INPUT(Z_MAX_PIN);
WRITE(Z_MAX_PIN, 0); // pullup resistors off
#endif
#if defined E_STEP_PIN && defined E_DIR_PIN
WRITE(E_STEP_PIN, 0); SET_OUTPUT(E_STEP_PIN);
WRITE(E_DIR_PIN, 0); SET_OUTPUT(E_DIR_PIN);
#endif
// Common Stepper Enable
#ifdef STEPPER_ENABLE_PIN
#ifdef STEPPER_INVERT_ENABLE
WRITE(STEPPER_ENABLE_PIN, 0);
#else
WRITE(STEPPER_ENABLE_PIN, 1);
#endif
SET_OUTPUT(STEPPER_ENABLE_PIN);
#endif
// X Stepper Enable
#ifdef X_ENABLE_PIN
#ifdef X_INVERT_ENABLE
WRITE(X_ENABLE_PIN, 0);
#else
WRITE(X_ENABLE_PIN, 1);
#endif
SET_OUTPUT(X_ENABLE_PIN);
#endif
// Y Stepper Enable
#ifdef Y_ENABLE_PIN
#ifdef Y_INVERT_ENABLE
WRITE(Y_ENABLE_PIN, 0);
#else
WRITE(Y_ENABLE_PIN, 1);
#endif
SET_OUTPUT(Y_ENABLE_PIN);
#endif
// Z Stepper Enable
#ifdef Z_ENABLE_PIN
#ifdef Z_INVERT_ENABLE
WRITE(Z_ENABLE_PIN, 0);
#else
WRITE(Z_ENABLE_PIN, 1);
#endif
SET_OUTPUT(Z_ENABLE_PIN);
#endif
// E Stepper Enable
#ifdef E_ENABLE_PIN
#ifdef E_INVERT_ENABLE
WRITE(E_ENABLE_PIN, 0);
#else
WRITE(E_ENABLE_PIN, 1);
#endif
SET_OUTPUT(E_ENABLE_PIN);
#endif
#ifdef STEPPER_ENABLE_PIN
power_off();
#endif
#ifdef TEMP_MAX6675
// setup SPI
WRITE(SCK, 0); SET_OUTPUT(SCK);
WRITE(MOSI, 1); SET_OUTPUT(MOSI);
WRITE(MISO, 1); SET_INPUT(MISO);
WRITE(SS, 1); SET_OUTPUT(SS);
#endif
#ifdef TEMP_INTERCOM
// Enable the RS485 transceiver
SET_OUTPUT(RX_ENABLE_PIN);
SET_OUTPUT(TX_ENABLE_PIN);
WRITE(RX_ENABLE_PIN,0);
disable_transmit();
#endif
}
/// initialise all I/O - set pins as input or output, turn off unused subsystems, etc
void io_init(void) {
// disable modules we don't use
#ifdef PRR
PRR = MASK(PRTWI) | MASK(PRADC) | MASK(PRSPI);
#elif defined PRR0
PRR0 = MASK(PRTWI) | MASK(PRADC) | MASK(PRSPI);
#if defined(PRUSART3)
// don't use USART2 or USART3- leave USART1 for GEN3 and derivatives
PRR1 |= MASK(PRUSART3) | MASK(PRUSART2);
#endif
#if defined(PRUSART2)
// don't use USART2 or USART3- leave USART1 for GEN3 and derivatives
PRR1 |= MASK(PRUSART2);
#endif
#endif
ACSR = MASK(ACD);
// setup I/O pins
// X Stepper
WRITE(X_STEP_PIN, 0); SET_OUTPUT(X_STEP_PIN);
WRITE(X_DIR_PIN, 0); SET_OUTPUT(X_DIR_PIN);
#ifdef X_MIN_PIN
SET_INPUT(X_MIN_PIN);
#ifdef USE_INTERNAL_PULLUPS
WRITE(X_MIN_PIN, 1);
#else
WRITE(X_MIN_PIN, 0);
#endif
#endif
#ifdef X_MAX_PIN
SET_INPUT(X_MAX_PIN);
#ifdef USE_INTERNAL_PULLUPS
WRITE(X_MAX_PIN, 1);
#else
WRITE(X_MAX_PIN, 0);
#endif
#endif
// Y Stepper
WRITE(Y_STEP_PIN, 0); SET_OUTPUT(Y_STEP_PIN);
WRITE(Y_DIR_PIN, 0); SET_OUTPUT(Y_DIR_PIN);
#ifdef Y_MIN_PIN
SET_INPUT(Y_MIN_PIN);
#ifdef USE_INTERNAL_PULLUPS
WRITE(Y_MIN_PIN, 1);
#else
WRITE(Y_MIN_PIN, 0);
#endif
#endif
#ifdef Y_MAX_PIN
SET_INPUT(Y_MAX_PIN);
#ifdef USE_INTERNAL_PULLUPS
WRITE(Y_MAX_PIN, 1);
#else
WRITE(Y_MAX_PIN, 0);
#endif
#endif
// Z Stepper
#if defined Z_STEP_PIN && defined Z_DIR_PIN
WRITE(Z_STEP_PIN, 0); SET_OUTPUT(Z_STEP_PIN);
WRITE(Z_DIR_PIN, 0); SET_OUTPUT(Z_DIR_PIN);
#endif
#ifdef Z_MIN_PIN
SET_INPUT(Z_MIN_PIN);
#ifdef USE_INTERNAL_PULLUPS
WRITE(Z_MIN_PIN, 1);
#else
WRITE(Z_MIN_PIN, 0);
#endif
#endif
#ifdef Z_MAX_PIN
SET_INPUT(Z_MAX_PIN);
#ifdef USE_INTERNAL_PULLUPS
WRITE(Z_MAX_PIN, 1);
#else
WRITE(Z_MAX_PIN, 0);
#endif
#endif
#if defined E_STEP_PIN && defined E_DIR_PIN
WRITE(E_STEP_PIN, 0); SET_OUTPUT(E_STEP_PIN);
WRITE(E_DIR_PIN, 0); SET_OUTPUT(E_DIR_PIN);
#endif
// Common Stepper Enable
#ifdef STEPPER_ENABLE_PIN
#ifdef STEPPER_INVERT_ENABLE
WRITE(STEPPER_ENABLE_PIN, 0);
#else
WRITE(STEPPER_ENABLE_PIN, 1);
#endif
SET_OUTPUT(STEPPER_ENABLE_PIN);
#endif
// X Stepper Enable
#ifdef X_ENABLE_PIN
#ifdef X_INVERT_ENABLE
WRITE(X_ENABLE_PIN, 0);
#else
WRITE(X_ENABLE_PIN, 1);
#endif
SET_OUTPUT(X_ENABLE_PIN);
#endif
// Y Stepper Enable
#ifdef Y_ENABLE_PIN
#ifdef Y_INVERT_ENABLE
WRITE(Y_ENABLE_PIN, 0);
#else
WRITE(Y_ENABLE_PIN, 1);
#endif
SET_OUTPUT(Y_ENABLE_PIN);
#endif
// Z Stepper Enable
#ifdef Z_ENABLE_PIN
#ifdef Z_INVERT_ENABLE
WRITE(Z_ENABLE_PIN, 0);
#else
WRITE(Z_ENABLE_PIN, 1);
#endif
SET_OUTPUT(Z_ENABLE_PIN);
#endif
// E Stepper Enable
#ifdef E_ENABLE_PIN
#ifdef E_INVERT_ENABLE
WRITE(E_ENABLE_PIN, 0);
#else
WRITE(E_ENABLE_PIN, 1);
#endif
SET_OUTPUT(E_ENABLE_PIN);
#endif
// setup PWM timers: fast PWM, no prescaler
TCCR0A = MASK(WGM01) | MASK(WGM00);
// PWM frequencies in TCCR0B, see page 108 of the ATmega644 reference.
TCCR0B = MASK(CS00); // F_CPU / 256 (about 78(62.5) kHz on a 20(16) MHz chip)
//TCCR0B = MASK(CS01); // F_CPU / 256 / 8 (about 9.8(7.8) kHz)
//TCCR0B = MASK(CS00) | MASK(CS01); // F_CPU / 256 / 64 (about 1220(977) Hz)
//TCCR0B = MASK(CS02); // F_CPU / 256 / 256 (about 305(244) Hz)
#ifndef FAST_PWM
TCCR0B = MASK(CS00) | MASK(CS02); // F_CPU / 256 / 1024 (about 76(61) Hz)
#endif
TIMSK0 = 0;
OCR0A = 0;
OCR0B = 0;
TCCR2A = MASK(WGM21) | MASK(WGM20);
// PWM frequencies in TCCR2B, see page 156 of the ATmega644 reference.
TCCR2B = MASK(CS20); // F_CPU / 256 (about 78(62.5) kHz on a 20(16) MHz chip)
//TCCR2B = MASK(CS21); // F_CPU / 256 / 8 (about 9.8(7.8) kHz)
//TCCR2B = MASK(CS20) | MASK(CS21); // F_CPU / 256 / 32 (about 2.4(2.0) kHz)
//TCCR2B = MASK(CS22); // F_CPU / 256 / 64 (about 1220(977) Hz)
//TCCR2B = MASK(CS20) | MASK(CS22); // F_CPU / 256 / 128 (about 610(488) Hz)
//TCCR2B = MASK(CS21) | MASK(CS22); // F_CPU / 256 / 256 (about 305(244) Hz)
#ifndef FAST_PWM
TCCR2B = MASK(CS20) | MASK(CS21) | MASK(CS22); // F_CPU / 256 / 1024
#endif
TIMSK2 = 0;
OCR2A = 0;
OCR2B = 0;
#ifdef TCCR3A
TCCR3A = MASK(WGM30);
TCCR3B = MASK(WGM32) | MASK(CS30);
TIMSK3 = 0;
OCR3A = 0;
OCR3B = 0;
#endif
#ifdef TCCR4A
TCCR4A = MASK(WGM40);
TCCR4B = MASK(WGM42) | MASK(CS40);
TIMSK4 = 0;
OCR4A = 0;
OCR4B = 0;
#endif
#ifdef TCCR5A
TCCR5A = MASK(WGM50);
TCCR5B = MASK(WGM52) | MASK(CS50);
TIMSK5 = 0;
OCR5A = 0;
OCR5B = 0;
#endif
#ifdef STEPPER_ENABLE_PIN
power_off();
#endif
// set all heater pins to output
do {
#undef DEFINE_HEATER
#define DEFINE_HEATER(name, pin) WRITE(pin, 0); SET_OUTPUT(pin);
#include "config.h"
#undef DEFINE_HEATER
} while (0);
#ifdef TEMP_MAX6675
// setup SPI
WRITE(SCK, 0); SET_OUTPUT(SCK);
WRITE(MOSI, 1); SET_OUTPUT(MOSI);
WRITE(MISO, 1); SET_INPUT(MISO);
WRITE(SS, 1); SET_OUTPUT(SS);
#endif
#ifdef TEMP_INTERCOM
// Enable the RS485 transceiver
SET_OUTPUT(RX_ENABLE_PIN);
SET_OUTPUT(TX_ENABLE_PIN);
WRITE(RX_ENABLE_PIN,0);
disable_transmit();
#endif
}
static void finish_send(void) {
state = READ_START1;
disable_transmit();
}