102 lines
2.1 KiB
C
102 lines
2.1 KiB
C
/*
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* btn.c: handler for user interface with real or capacitive buttons
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*/
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#include "ch32x035_conf.h"
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#include "btn.h"
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#include "driver/adc.h"
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BtnSub btn[BTN_COUNT];
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uint16_t btn_pushed;
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uint16_t btn_held;
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void btn_push_cb(uint8_t idx)
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{
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if (!(btn_pushed & (1 << idx))) {
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btn_pushed |= (1 << idx);
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if (btn[idx].cb_push) btn[idx].cb_push(idx);
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}
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}
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void btn_hold_cb(uint8_t idx)
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{
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btn_held |= (1 << idx);
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if (btn[idx].cb_hold) btn[idx].cb_hold(idx);
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}
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void btn_release_cb(uint8_t idx)
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{
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btn_pushed &= ~(1 << idx);
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btn_held &= ~(1 << idx);
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if (btn[idx].cb_release) btn[idx].cb_release(idx);
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}
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void btn_process()
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{
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uint16_t i;
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uint32_t x;
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uint16_t btn_state[4] = {0};
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// fill button bitfield
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for (i = 0; i < BTN_COUNT; i++) {
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if (i == 0) {
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// GPIOC pulldown button
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x = GPIOC->INDR & (1 << 10); // PC10 (or PC17)
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} else if (i < 3) {
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// GPIOB pullup buttons
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x = !(GPIOB->INDR & (1 << (i + 10))); // PB11, PB12
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} else {
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// touch sensors
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x = adc_get_tkey(i - 3);
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}
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// is pushed?
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if (x) {
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if (btn[i].hold != 0xffff)
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btn[i].hold++;
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if (btn[i].hold == DEBOUNCE) {
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btn_state[1] |= (1 << i);
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}
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}
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// is held?
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if (btn[i].hold == HOLD_COUNTS) {
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btn_state[2] |= (1 << i);
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}
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// is repeated?
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if (btn[i].repeat && (btn[i].hold == (HOLD_COUNTS + btn[i].repeat))) {
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btn_state[2] |= (1 << i);
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btn[i].hold = HOLD_COUNTS;
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}
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// is released?
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if (!x) {
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if (btn[i].hold) {
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btn[i].hold = 0;
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btn_state[3] |= (1 << i);
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}
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}
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}
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// process callbacks for new events
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for (i = 0; i < BTN_COUNT; i++) {
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if (btn_state[1] & (1 << i)) {
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btn_push_cb(i);
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}
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if (btn_state[2] & (1 << i)) {
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btn_hold_cb(i);
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}
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if (btn_state[3] & (1 << i)) {
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btn_release_cb(i);
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}
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}
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}
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