Handle Mission Select

Core/Inc/events.h

@@ -1,4 +1,60 @@
 #ifndef __EVENTS_H
 #define __EVENTS_H
 
+#include "stm32g441xx.h"
+
+#include <stdint.h>
+
+typedef enum {
+  BTN_PRESS_PREV,
+  BTN_PRESS_R2D,
+  BTN_PRESS_OK,
+  BTN_PRESS_NEXT
+} ButtonPressEvent;
+
+typedef enum { ENC0, ENC1 } Encoder;
+typedef enum { ENC_CHANGE_INC, ENC_CHANGE_DEC } EncoderChangeDirection;
+typedef struct {
+  Encoder encoder;
+  EncoderChangeDirection dir;
+} EncoderChangeEvent;
+
+typedef enum { EV_BTN_PRESS, EV_ENC_CHANGE } EventType;
+
+typedef struct {
+  EventType type;
+  union {
+    ButtonPressEvent btn_press;
+    EncoderChangeEvent enc_change;
+  };
+} Event;
+
+#define EVENT_QUEUE_SIZE 32
+typedef struct {
+  Event ring_buffer[EVENT_QUEUE_SIZE];
+  uint16_t read_idx;
+  uint16_t write_idx;
+} EventQueue;
+
+/**
+ * @brief Push an event to the back of the queue.
+ *
+ * The event is deep-copied to the queue, so it can be deallocated after the
+ * call is complete.
+ */
+void event_push(Event *ev);
+/**
+ * @brief Pop an event from the start of the queue.
+ *
+ * The value in the queue may be overwritten with the next event_push() call.
+ * Since that call can happen in an interrupt, i.e. is probably out of control
+ * of the event_pop() caller, we return by value here.
+ */
+Event event_pop();
+
+uint16_t event_num_pending();
+uint16_t event_num_free();
+
+void handle_events();
+
 #endif // __EVENTS_H

Core/Inc/main.h

@@ -75,12 +75,16 @@ void Error_Handler(void);
 #define V_POT_GPIO_Port GPIOB
 #define BTN0_Pin GPIO_PIN_12
 #define BTN0_GPIO_Port GPIOB
+#define BTN0_EXTI_IRQn EXTI15_10_IRQn
 #define BTN1_Pin GPIO_PIN_13
 #define BTN1_GPIO_Port GPIOB
+#define BTN1_EXTI_IRQn EXTI15_10_IRQn
 #define BTN2_Pin GPIO_PIN_14
 #define BTN2_GPIO_Port GPIOB
+#define BTN2_EXTI_IRQn EXTI15_10_IRQn
 #define BTN3_Pin GPIO_PIN_15
 #define BTN3_GPIO_Port GPIOB
+#define BTN3_EXTI_IRQn EXTI15_10_IRQn
 #define DISP_RESET_Pin GPIO_PIN_15
 #define DISP_RESET_GPIO_Port GPIOA
 #define ENC0A_Pin GPIO_PIN_4

Core/Inc/rpi.h

@@ -28,5 +28,6 @@ extern size_t rpi_num_polls;
 void rpi_init(I2C_HandleTypeDef *handle);
 
 void rpi_update_tx_buffer();
+void rpi_update_tx_buffer_mission_select();
 
 #endif // __RPI_H

Core/Inc/state.h

@@ -8,8 +8,33 @@ typedef enum {
   VIEW_TESTING = 3
 } STWView;
 
+typedef enum {
+  MISSION_NONE,
+  MISSION_ACCELERATION,
+  MISSION_SKIDPAD,
+  MISSION_AUTOCROSS,
+  MISSION_TRACKDRIVE,
+  MISSION_EBS_TEST,
+  MISSION_INSPECTION,
+  MISSION_MANUAL
+} Mission;
+
+typedef struct {
+  Mission selection;
+} MissionSelectState;
+
+typedef struct {
+  Mission current_mission;
+} AMIState;
+
+typedef union {
+  MissionSelectState mission_select;
+  AMIState ami;
+} ViewState;
+
 typedef struct {
   STWView view;
+  ViewState view_state;
 } STWState;
 
 extern STWState stw_state;

Core/Inc/stm32g4xx_it.h

@@ -56,6 +56,7 @@ void DebugMon_Handler(void);
 void PendSV_Handler(void);
 void SysTick_Handler(void);
 void I2C2_EV_IRQHandler(void);
+void EXTI15_10_IRQHandler(void);
 /* USER CODE BEGIN EFP */
 
 /* USER CODE END EFP */

Core/Inc/user_inputs.h

@@ -0,0 +1,11 @@
+#ifndef __FT_USER_INPUTS_H
+#define __FT_USER_INPUTS_H
+
+#include "events.h"
+#include "stm32g4xx_hal.h"
+
+void handle_button_press(const ButtonPressEvent *ev);
+
+void handle_button_press_mission_select(const ButtonPressEvent *ev);
+
+#endif // __FT_USER_INPUTS_H