/**
* \brief Run tests and turn on power to simulated oven plate
*
* This functions runs some class B tests, reinitializes Timer/Counters, ADC and
* DAC used by the oven, then turns on and starts monitoring of periodic tests.
*/
static void ovenctl_turn_on_plate(void)
{
/* Store current DAC value since the analog IO test is destructive */
uint16_t dac_val = DACB.CH0DATA;
/* Run tests -- classb_error is updated if any of them fail */
oven_classb_run_tests();
/* Initialize the ADC and DAC modules, as well as the Timer/Counters
* we use to emulate real world application.
*/
main_init_adc_dac();
DACB.CH0DATA = dac_val;
main_init_tc();
/* Enable and set up timer for periodic temperature checking */
tc_enable(&OVEN_PERIODIC_TEMPTEST_TC);
/* Set timer to overflow every 600ms: 24MHz / (1024 * 14063) = 0.6s */
tc_write_clock_source(&OVEN_PERIODIC_TEMPTEST_TC, TC_CLKSEL_DIV1024_gc);
tc_write_period(&OVEN_PERIODIC_TEMPTEST_TC, 14062);
/* Set up temperature check as interrupt callback function, then enable
* interrupts
*/
tc_set_overflow_interrupt_callback(&OVEN_PERIODIC_TEMPTEST_TC,
ovenctl_periodic_temperature_sanity_check);
tc_set_overflow_interrupt_level(&OVEN_PERIODIC_TEMPTEST_TC,
TC_OVFINTLVL_LO_gc);
/* Enable monitoring of the periodic temperature check */
classb_intmon_set_state(TEMP_SANITY_TEST, M_ENABLE);
/* Enable and set up timer for periodic execution of Class B tests */
tc_enable(&OVEN_PERIODIC_CLASSB_TC);
/* Set timer to overflow every second: 24MHz / (1024 * 23438) = 1s */
tc_write_clock_source(&OVEN_PERIODIC_CLASSB_TC, TC_CLKSEL_DIV1024_gc);
tc_write_period(&OVEN_PERIODIC_CLASSB_TC, 23437);
/* Set up periodic class B test as interrupt callback function, then
* enable interrupts
*/
tc_set_overflow_interrupt_callback(&OVEN_PERIODIC_CLASSB_TC,
ovenctl_periodic_classb_tests);
tc_set_overflow_interrupt_level(&OVEN_PERIODIC_CLASSB_TC,
TC_OVFINTLVL_LO_gc);
/* Enable monitoring of the periodic temperature check */
classb_intmon_set_state(PER_CLASSB_TESTS, M_ENABLE);
}
/**
* \brief Main function.
*
* Initializes the board, displays splash screens, then launches application.
*
* If the application exits (fails), the error is written to display and an
* infinite loop with watchdog resets is entered.
*/
int main(void)
{
/* Holds state of the QTouch button */
enum pot_t potstate = POT_OFF;
/* Last state of the QTouch button for change detection */
enum pot_t last_potstate = POT_OFF;
/* Holds user-selected power-setting */
uint8_t wattage = 0;
/* Last power-setting for change detection */
uint8_t last_wattage = 0;
/* Whether the plate element is/should be actuated */
bool power = false;
/* Last power setting for change detection */
bool last_power = false;
/* Last time a simulation step was executed */
uint32_t last_sim_step;
/* Last time a control step was executed */
uint32_t last_ctl_step;
/* The WDT was just reset by the WDT functional test*/
classb_last_wdt_reset = rtc_get_time();
last_sim_step = classb_last_wdt_reset;
last_ctl_step = classb_last_wdt_reset;
sysclk_init();
board_init();
pmic_init();
gfx_mono_init();
touch_init();
main_init_rtc32();
cpu_irq_enable();
/* Enable display backlight */
ioport_set_pin_level(LCD_BACKLIGHT_ENABLE_PIN,
LCD_BACKLIGHT_ENABLE_LEVEL);
/* If an error was detected, skip directly to displaying it */
if (classb_error) {
goto display_error;
}
/* Check if required jumpers are mounted, show explanation if not */
if (!main_check_jumpers()) {
show_explain_splash();
}
/* Display a splash screen showing button functions */
show_button_splash();
/* Initialize the ADC, DAC and Timer/Counter modules that are used to
* emulate real world objects.
*/
main_init_adc_dac();
main_init_tc();
/* Initialize subsystems used for Class B testing */
oven_classb_init_tests();
/* Reset the simulation states */
oven_plant_init();
/* Clear screen */
gfx_mono_draw_filled_rect(0, 0, 128, 32, GFX_PIXEL_CLR);
/* Draw the initial axis system */
oven_ui_draw_axis();
/* Draw the user interface */
oven_ui_update_graphics(potstate, wattage, power);
/* Run simulation as long as no error is detected in class B tests */
while (!classb_error) {
uint32_t current_time;
oven_wdt_periodic_reset();
current_time = rtc_get_time();
/* Add power on SW1 press, wrap at 20 */
if (oven_ui_power_button_is_pressed()) {
wattage = (wattage + 5) % 20;
}
/* Check QTouch sensor and map this to `potstate`. This is
* needed both for simulation and for the control routine.
*/
potstate = (!touch_key_is_pressed()) ? POT_ON : POT_OFF;
/* Execute control routine periodically */
if (current_time > (last_ctl_step + OVEN_CTL_STEP_TIME)) {
ovenctl_execute_control_step(current_time, &wattage,
&power, potstate);
last_ctl_step = current_time;
}
/* Execute simulation step periodically */
if (current_time > (last_sim_step + OVEN_SIM_STEP_TIME)) {
main_execute_simulation_step(current_time, potstate);
last_sim_step = current_time;
}
/* Update graphics on wattage, power or pot on/off change */
if ((potstate != last_potstate) || (power != last_power)
|| (wattage != last_wattage)) {
oven_ui_update_graphics(potstate, wattage, power);
}
/* Update variable states for change detection on next loop
* iteration.
*/
last_power = power;
last_wattage = wattage;
last_potstate = potstate;
/* If back/menu button is pressed, pause simulation and test
* timers, and show menu.
*/
if (oven_ui_back_button_is_pressed()) {
/* Disable interrupt monitoring, if enabled */
classb_intmon_set_state(TEMP_SANITY_TEST, M_DISABLE);
classb_intmon_set_state(PER_CLASSB_TESTS, M_DISABLE);
OVEN_PERIODIC_TEMPTEST_TC.CTRLA &= ~TC1_CLKSEL_gm;
OVEN_PERIODIC_CLASSB_TC.CTRLA &= ~TC0_CLKSEL_gm;
/* Show the error insertion menu */
oven_classb_error_insertion();
/* Re-enable timers upon return */
OVEN_PERIODIC_CLASSB_TC.CTRLA |= TC_CLKSEL_DIV1024_gc;
/* If user did not induce an error in the temperature
* test timing, re-enable it correctly.
*/
if ((OVEN_PERIODIC_TEMPTEST_TC.CTRLA & TC1_CLKSEL_gm)
== TC_CLKSEL_OFF_gc) {
OVEN_PERIODIC_TEMPTEST_TC.CTRLA
|= TC_CLKSEL_DIV1024_gc;
}
/* Re-enable interrupt monitoring if the oven is
* supposed to be on, i.e., they were enabled before.
*/
if (wattage > 0) {
classb_intmon_set_state(TEMP_SANITY_TEST,
M_ENABLE);
classb_intmon_set_state(PER_CLASSB_TESTS,
M_ENABLE);
}
/* Reset UI */
gfx_mono_draw_filled_rect(0, 0, 128, 32, GFX_PIXEL_CLR);
oven_ui_draw_axis();
oven_ui_update_graphics(potstate, wattage, power);
}
}
display_error:
/* Show red status LED and write the error on display */
oven_ui_set_status_leds(S_RED);
oven_classb_display_error();
/* Enter infinite loop of watchdog resets so user can read display */
while (true) {
oven_wdt_periodic_reset();
}
}
