dc31-addon-addon-badge-firm.../badge_firmware/code/inc/btn.h

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/*
* btn.h
*
* Created on: Aug 3, 2023
* Author: true
*/
#ifndef CODE_INC_BTN_H_
#define CODE_INC_BTN_H_
#define BTN_MODE 0
#define BTN_PROG 1
#define BTN_SET 2
#define BTN_COUNT 3
#define BTN_PUSH (1 << 0)
#define BTN_HELD (1 << 1)
#define BTN_HELDRT (1 << 2)
#define BTN_RELEASE (1 << 3)
#define BTN_PUSH_CB (1 << 4)
#define BTN_HELD_CB (1 << 5)
#define BTN_HELDRT_CB (1 << 6)
#define BTN_RELEASE_CB (1 << 7)
#define BTN_DEBOUNCE 11 // how many button ticks to wait before registering press
#define BTN_MAX_HOLD (512*30) // longest reported / processed hold time (30s)
#define BTN_HOLD_SHIFT 5 // rshift value to get 1/16th sec hold time
#define BTN_HOLD_0_25S 4
#define BTN_HOLD_0_50S 8
#define BTN_HOLD_1_00S 16
#define BTN_HOLD_1_50S 24
#define BTN_HOLD_2_00S (16 * 2)
#define BTN_HOLD_3_00S (16 * 3)
#define BTN_HOLD_4_00S (16 * 4)
#define BTN_HOLD_5_00S (16 * 5)
typedef struct Btn_t {
uint16_t state; // current state of button (pushed, held, callback done, etc)
uint16_t held; // current hold counts, in button tickrate
uint16_t hold_thresh; // hold time trigger threshold in 1/16 second increments
uint16_t hold_retrig; // hold time retrigger threshold in button ticks, 0 disables
uint16_t hold_rt_ctr; // hold retrigger counter
void (*push_cb)(uint8_t);
void (*held_cb)(uint8_t);
void (*release_cb)(uint8_t);
} Btn_t;
/*
* as long as button is pushed, .held will be incrementing
* when .held exceeds debounce, a BTN_PUSH event will occur and push_cb will be called
* .held will continue to increment while being held until BTN_MAX_HOLD is reached
* when .hold_thresh is matched, a BTN_HELD event will occur and held_cb will be called
* at this point, .hold_rt_ctr will begin counting with each button tick
* when .hold_rt_ctr matches .hold_retrig, held_cb will be called again, and .hold_rt_ctr will be 0'd
* even after .held stops counting, the .hold_rt_ctr will continue to run
* if .hold_thresh is 0, then no BTN_HELD event will occur, and thus no retriggering either
* if .hold_retrig is 0, then BTN_HELD will occur, but retriggers will not occur
* upon release, BTN_RELEASED event will occur and release_cb will be called
* after finishing release callback, .state will be cleared, .held will be 0
*/
extern Btn_t btn[BTN_COUNT];
void btn_init();
void btn_tick();
void btn_callback();
#endif /* CODE_INC_BTN_H_ */