Issue #4: Implement Constant temperature function in GUI. This is useful to verify the oven parameters

stm-firmware/ui/gui.c

@@ -25,6 +25,7 @@
 #include <reflow-controller/systick.h>
 #include <reflow-controller/adc-meas.h>
 #include <reflow-controller/safety/safety-controller.h>
+#include <reflow-controller/settings/settings.h>
 #include <reflow-controller/temp-converter.h>
 #include <helper-macros/helper-macros.h>
 #include <stm-periph/unique-id.h>
@@ -33,6 +34,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <inttypes.h>
+#include <reflow-controller/oven-driver.h>
 
 static char IN_SECTION(.ccm.bss) display_buffer[4][21] = {0};
 static struct lcd_menu IN_SECTION(.ccm.bss) reflow_menu;
@@ -297,21 +299,113 @@ static void gui_menu_err_flags(struct lcd_menu *menu, enum menu_entry_func_entry
 	timestamp = systick_get_global_tick();
 }
 
+static void gui_menu_constant_temperature_driver(struct lcd_menu *menu, enum menu_entry_func_entry entry_type, void *parent)
+{
+	static void IN_SECTION(.ccm.bss) *my_parent;
+	static int16_t IN_SECTION(.ccm.bss) temperature;
+	static bool IN_SECTION(.ccm.bss) fine;
+	enum button_state button;
+	int16_t rot;
+	int16_t temp_old;
+
+	if (entry_type == MENU_ENTRY_FIRST_ENTER) {
+		my_parent = parent;
+		temperature = 30;
+		menu_display_clear(menu);
+		menu_lcd_outputf(menu, 0, "Temp Controller");
+		temp_old = 0;
+	} else {
+		temp_old = temperature;
+	}
+	if (menu_get_button_ready_state(menu)) {
+		button = menu_get_button_state(menu);
+		rot = menu_get_rotary_delta(menu);
+		if (rot >= 4 || rot <= -4) {
+			menu_ack_rotary_delta(menu);
+			if (rot > 0)
+				temperature += (fine ? 1 : 10);
+			else
+				temperature -= (fine ? 1 : 10);
+			if (temperature > 300)
+				temperature = 300;
+			else if (temperature < 0)
+				temperature = 0;
+		}
+
+		switch (button) {
+		case BUTTON_SHORT_RELEASED:
+			fine = !fine;
+			break;
+		case BUTTON_LONG:
+			oven_pid_stop();
+			menu_entry_dropback(menu, my_parent);
+			break;
+		default:
+			break;
+		}
+	}
+	if (oven_pid_get_status() != OVEN_PID_RUNNING) {
+		menu_lcd_output(menu, 1, "PID stopped!");
+		menu_lcd_output(menu, 2, "Check Flags!");
+	} else {
+		if (temperature != temp_old) {
+			oven_pid_set_target_temperature((float)temperature);
+			menu_lcd_outputf(menu, 1, "Temp: %d " LCD_DEGREE_SYMBOL_STRING "C", (int)temperature);
+		}
+	}
+
+}
+
+static void gui_menu_constant_temperature_driver_setup(struct lcd_menu *menu, enum menu_entry_func_entry entry_type, void *parent)
+{
+	static void IN_SECTION(.ccm.bss) *my_parent;
+	struct oven_pid_settings pid_settings;
+	enum button_state button;
+	struct pid_controller pid_controller;
+
+	if (entry_type == MENU_ENTRY_FIRST_ENTER) {
+		my_parent = parent;
+
+		/* Try loading PID parameters */
+		if (settings_load_pid_oven_parameters(&pid_settings)) {
+			menu_display_clear(menu);
+			menu_lcd_output(menu, 0, "Could not load");
+			menu_lcd_output(menu, 1, "PID parameters");
+		} else {
+			pid_init(&pid_controller, pid_settings.kd, pid_settings.ki, pid_settings.kp, 0, 100,
+				 pid_settings.max_integral, pid_settings.t_sample);
+			oven_pid_init(&pid_controller);
+			menu_entry_enter(menu, gui_menu_constant_temperature_driver, true);
+		}
+	} else if (entry_type == MENU_ENTRY_DROPBACK) {
+		menu_entry_dropback(menu, my_parent);
+	}
+
+	if (menu_get_button_ready_state(menu)) {
+		button = menu_get_button_state(menu);
+		if (button == BUTTON_SHORT_RELEASED || button == BUTTON_LONG) {
+			menu_entry_dropback(menu, my_parent);
+		}
+	}
+}
+
 static void gui_menu_root_entry(struct lcd_menu *menu, enum menu_entry_func_entry entry_type, void *parent)
 {
 	(void)parent;
 	static struct menu_list list;
 	bool menu_changed = false;
 	static const char * const root_entry_names[] = {
-		"About",
+		"Constant Temp",
 		"Monitoring",
 		"Error Flags",
+		"About",
 		NULL
 	};
 	static const menu_func_t root_entry_funcs[] = {
-		gui_menu_about,
+		gui_menu_constant_temperature_driver_setup,
 		gui_menu_monitor,
 		gui_menu_err_flags,
+		gui_menu_about,
 	};
 	enum button_state push_button;
 	int16_t rot_delta;

stm-firmware/ui/menu.c

@@ -81,6 +81,8 @@ void menu_entry_dropback(struct lcd_menu *menu, menu_func_t parent_func)
 	else
 		menu->active_entry = menu->root_entry;
 
+	menu_ack_rotary_delta(menu);
+
 	menu->active_entry_type = MENU_ENTRY_DROPBACK;
 }