Class B Oven settings.

Macros
#define	oven_wdt_periodic_reset()
	Reset the WDT when OVEN_WDT_RESET_PERIOD has passed. More...

Timing configurations
#define	OVEN_WDT_RESET_PERIOD 1250
	Number of RTC ticks between WDT resets. More...

#define	OVEN_SIM_STEP_TIME 100
	How often a simulation step should be executed [ms]. More...

#define	OVEN_CTL_STEP_TIME 20
	How often a control step should be executed [ms]. More...

Simulation control signal timers selection
#define	OVEN_FREQ_TC TCC0
	Timer used to output frequency signal controlling the induction element. More...

#define	FREQ_TIMER_PERIOD_INIT 0x100
	Initial period for the frequency timer. More...

#define	OVEN_FREQ_CAPT_TC TCC1
	Timer used to capture the generated frequency signal. More...

Test timer selection
#define	CLASSB_FREQTEST_TC TCD1
	Timer used by the Class B frequency consistency test of the CPU clock. More...

#define	OVEN_PERIODIC_TEMPTEST_TC TCE1
	Timer used to execute periodic temperature sanity test. More...

#define	OVEN_PERIODIC_CLASSB_TC TCE0
	Timer used to execute periodic Class B tests. More...

Display configuration
#define	OVEN_PLOT_OFFSET_X 5
	X offset for the plot window. More...

#define	OVEN_PLOT_MAX_X 112
	Rightmost X coordinate of the plot window. More...

#define	OVEN_PLOT_MAX_Y 29
	Lowest Y coordinate in the plot window. More...

#define	OVEN_PLOT_MIN_Y 0
	Topmost Y coordinate in the plot window. More...

#define	OVEN_DISP_MAX_Y 32
	Display height. More...

#define	MAX_WATTAGE 15
	Maximum watt level. More...

Enumerations
Oven state enumerations
enum	ovenctl_plate_state { POWER_OFF, ON_NO_POT, ON_ACTUATING }
	Current state of the oven. More...

enum	status_led { S_ORANGE, S_GREEN, S_RED, S_OFF }
	Status LED color enumerations. More...

enum	pot_t { POT_OFF, POT_ON }
	Pot status on or off plate enumeration. More...

Functions
void	main_init_adc_dac (void)
	Initialize ADC and DAC used to simulate a temperature sensor. More...

void	main_init_tc (void)
	Initialize Timer/Counters used to simulate oven actuation signal. More...

Variables
volatile uint32_t	classb_last_wdt_reset
	Global container for last WDT reset time. More...

#define CLASSB_FREQTEST_TC TCD1

Timer used by the Class B frequency consistency test of the CPU clock.

Referenced by oven_classb_init_tests().

#define FREQ_TIMER_PERIOD_INIT 0x100

Initial period for the frequency timer.

Referenced by main_init_tc().

#define MAX_WATTAGE 15

Maximum watt level.

Referenced by oven_ui_update_graphics().

#define OVEN_CTL_STEP_TIME 20

How often a control step should be executed [ms].

Referenced by main().

#define OVEN_DISP_MAX_Y 32

Display height.

Referenced by oven_ui_draw_plot_step().

#define OVEN_FREQ_CAPT_TC TCC1

Timer used to capture the generated frequency signal.

Referenced by main_init_tc(), and oven_plant_read_signal_period().

#define OVEN_FREQ_TC TCC0

Timer used to output frequency signal controlling the induction element.

Referenced by main_init_tc(), and ovenctl_actuate_induction_element().

#define OVEN_PERIODIC_CLASSB_TC TCE0

Timer used to execute periodic Class B tests.

Referenced by main(), ovenctl_turn_off_plate(), and ovenctl_turn_on_plate().

#define OVEN_PERIODIC_TEMPTEST_TC TCE1

Timer used to execute periodic temperature sanity test.

Referenced by main(), oven_classb_error_insertion(), ovenctl_turn_off_plate(), and ovenctl_turn_on_plate().

#define OVEN_PLOT_MAX_X 112

Rightmost X coordinate of the plot window.

Referenced by oven_ui_draw_plot_step().

#define OVEN_PLOT_MAX_Y 29

Lowest Y coordinate in the plot window.

Referenced by oven_ui_draw_plot_step().

#define OVEN_PLOT_MIN_Y 0

Topmost Y coordinate in the plot window.

Referenced by oven_ui_draw_plot_step().

#define OVEN_PLOT_OFFSET_X 5

X offset for the plot window.

Referenced by oven_ui_draw_plot_step().

#define OVEN_SIM_STEP_TIME 100

How often a simulation step should be executed [ms].

Referenced by main().

#define oven_wdt_periodic_reset ( )

Value:

do {                                         \
    if ((rtc_get_time() - classb_last_wdt_reset) > OVEN_WDT_RESET_PERIOD) {\
		wdt_reset();                                                   \
		classb_last_wdt_reset = rtc_get_time();                        \
    }                                                                      \
} while(0)

Reset the WDT when OVEN_WDT_RESET_PERIOD has passed.

This macro depends on the ASF RTC driver and that the timer is running because it is used to get correct timing of watchdog resets in windowed mode.

Referenced by main(), oven_classb_error_insertion(), oven_classb_flash_corrupter(), show_button_splash(), and show_explain_splash().

#define OVEN_WDT_RESET_PERIOD 1250

Number of RTC ticks between WDT resets.

Should be in the middle of the open window period of the WDT, e.g. at 625 ticks if WPER is 500CLK and PER is 250CLK.

enum ovenctl_plate_state

Current state of the oven.

Enumerator
POWER_OFF	The power to the oven is turned off.
ON_NO_POT	Actuation is desired, but there is nothing on the plate.
ON_ACTUATING	Actuation is desired and is applied.

enum pot_t

Pot status on or off plate enumeration.

Enumerator
POT_OFF
POT_ON

enum status_led

Status LED color enumerations.

Enumerator
S_ORANGE
S_GREEN
S_RED
S_OFF

void main_init_adc_dac ( void )

Initialize ADC and DAC used to simulate a temperature sensor.

DACB is used by the simulation plant to output a temperature reading of the oven plate. It is set up to output a voltage on pin B2 which is marked as ADC2 on header J2.

ADCA is used in the control step and graphical interface to show the current temperature of the oven plate. It is set up to read a voltage on pin A4 which is marked as ADC4 on header J2.

ADC2 and ADC4 should be connected together, so that the ADC samples the DAC directly.

References ADC_CH0, adc_enable(), adc_read_configuration(), ADC_REF_BANDGAP, ADC_RES_12, adc_set_clock_rate(), adc_set_conversion_parameters(), adc_set_conversion_trigger(), ADC_SIGN_ON, adc_start_conversion(), ADC_TRIG_MANUAL, adc_write_configuration(), ADCCH_NEG_NONE, ADCCH_POS_PIN4, adcch_read_configuration(), adcch_set_input(), adcch_write_configuration(), DAC_ADJ_RIGHT, DAC_CH0, dac_enable(), dac_read_configuration(), DAC_REF_BANDGAP, dac_set_active_channel(), dac_set_conversion_parameters(), dac_write_configuration(), IOPORT_DIR_INPUT, IOPORT_MODE_PULLDOWN, ioport_set_pin_dir(), ioport_set_pin_mode(), and J2_PIN4.

Referenced by main(), and ovenctl_turn_on_plate().

void main_init_tc ( void )

Initialize Timer/Counters used to simulate oven actuation signal.

TCC0 is set up to generate a dual variable frequency signal with dead-time insertion using the AWEX module. This is similar to how heating elements are actuated in real induction ovens. Its output is on pin C2 which is marked as RXD on header J1.

TCC1 is set up to capture a frequency signal via a pin change event using the XMEGA Event System. Its input is pin C4 which is marked as SS on header J1.

References FREQ_TIMER_PERIOD_INIT, IOPORT_BOTHEDGES, ioport_configure_pin(), IOPORT_DIR_INPUT, IOPORT_DIR_OUTPUT, J1_PIN2, J1_PIN4, OVEN_FREQ_CAPT_TC, OVEN_FREQ_TC, tc_awex_enable_ccb_deadtime(), tc_awex_set_dti_high(), tc_awex_set_dti_low(), tc_awex_set_output_override(), TC_CCA, TC_CCAEN, tc_enable(), tc_enable_cc_channels(), tc_set_input_capture(), tc_set_wgm(), TC_WG_FRQ, tc_write_cc(), and tc_write_clock_source().

Referenced by main(), and ovenctl_turn_on_plate().

volatile uint32_t classb_last_wdt_reset

Global container for last WDT reset time.

Referenced by main(), and main_init_rtc32().

Microchip® Advanced Software Framework

Macros

Enumerations

Functions

Variables