oven_controller.h File Reference

Class B Oven controller.

Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.

#include <asf.h>

Functions
void	ovenctl_execute_control_step (uint32_t time, uint8_t *wattage, bool *power, enum pot_t potstate)
	Execute oven control step. More...
uint16_t	ovenctl_get_plate_temperature (void)
	Reads a 16-bit analog value on ADC channel 0 and returns it. More...

void ovenctl_execute_control_step	(	uint32_t	time,
		uint8_t *	wattage,
		bool *	power,
		enum pot_t	potstate
	)

Execute oven control step.

This function takes information from the user interface, temperature sensor and plate (QTouch) sensing and controls the output to the induction elements via a frequency signal.

The oven has three states:

• POWER_OFF where we just wait for input from the user interface to turn on.
• ON_NO_POT where the user has indicated that power should be applied, but there is no pot in the plate. A safety timer changes the state back to POWER_OFF.
• ON_ACTUATING where we have a pot on the oven, and actuate the induction elements while waiting for user input, and check if there is a pot on the oven.

Parameters

time	Current system time in milliseconds.
*wattage	Pointer to the variable representing the desired effect
*power	Pointer to the variable controlling whether the induction coils should be actuated.
potstate	A variable representing the latest information on whether anything is present on the plate (QTouch sensor)

References ON_ACTUATING, ON_NO_POT, ovenctl_actuate_induction_element(), ovenctl_turn_off_plate(), ovenctl_turn_on_plate(), POT_OFF, POT_ON, POWER_OFF, and rtc_get_time().

Referenced by main().

uint16_t ovenctl_get_plate_temperature

(

void

)

Reads a 16-bit analog value on ADC channel 0 and returns it.

In this application CH0 is set up to read the analog voltage from a simulated thermometer.

Returns

Temperature of the induction element.

References ADC_CH0, adc_get_unsigned_result(), adc_start_conversion(), and adc_wait_for_interrupt_flag().

Referenced by main_execute_simulation_step(), and ovenctl_periodic_temperature_sanity_check().