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