293 lines
8.7 KiB
C
293 lines
8.7 KiB
C
/*******************************************************************************
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* @file led_control.c
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* @brief LED 직접 제어 드라이버 (BSP 미사용)
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* @date 2026-03-30
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*
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* app_timer 1개로 2색 LED(녹색/주황)의 복합 blink 패턴 구현
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* 단순 on/off 상태는 타이머 없이 즉시 GPIO 제어
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* 복합 패턴(에러 등)은 phase 기반 state machine으로 처리
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******************************************************************************/
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#include "led_control.h"
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#include "nrf_gpio.h"
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#include "app_timer.h"
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/*==============================================================================
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* 내부 상수
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*============================================================================*/
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#define MS_TO_TICKS(ms) APP_TIMER_TICKS(ms)
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/*==============================================================================
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* 색상
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*============================================================================*/
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#define COLOR_NONE 0
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#define COLOR_GREEN 1
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#define COLOR_ORANGE 2
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/*==============================================================================
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* 에러 패턴 상수 (No.7)
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* 3Hz 깜빡 3회 = 166ms on + 166ms off × 3 = ~1초, 이후 꺼짐 1초
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*============================================================================*/
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#define ERROR_BLINK_ON_MS 166
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#define ERROR_BLINK_OFF_MS 166
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#define ERROR_BLINK_COUNT 3
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#define ERROR_PAUSE_MS 1000
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/*==============================================================================
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* 패턴 테이블 (단순 blink 용)
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*============================================================================*/
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typedef struct
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{
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uint32_t on_ms; /* LED 켜짐 시간 (ms) */
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uint32_t off_ms; /* LED 꺼짐 시간 (ms) */
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uint8_t color; /* COLOR_GREEN 또는 COLOR_ORANGE */
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bool repeat; /* true: 무한 반복, false: 1회 후 OFF */
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} led_pattern_t;
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static const led_pattern_t m_patterns[LED_STATE_COUNT] =
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{
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[LED_STATE_OFF] = { 0, 0, COLOR_NONE, false },
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[LED_STATE_POWER_ON] = { 2000, 0, COLOR_GREEN, false }, /* 초록 점등 2초 → 유지 */
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[LED_STATE_POWER_OFF] = { 2000, 0, COLOR_GREEN, false }, /* 초록 점등 2초 → OFF */
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[LED_STATE_ADVERTISING] = { 500, 500, COLOR_GREEN, true }, /* 초록 점멸 1초 */
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[LED_STATE_DETACH_WARNING] = { 1000, 3000, COLOR_GREEN, true }, /* 초록 1초 on / 3초 off */
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[LED_STATE_ALIGN_SEARCHING] = { 1000, 1000, COLOR_ORANGE, true }, /* 주황 점멸 1초 */
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[LED_STATE_ALIGN_COMPLETE] = { 3000, 1000, COLOR_GREEN, true }, /* 초록 3초 on / 1초 off */
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[LED_STATE_ERROR] = { 0, 0, COLOR_ORANGE, true } /* 별도 state machine */
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};
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/*==============================================================================
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* 모듈 변수
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*============================================================================*/
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APP_TIMER_DEF(m_led_timer);
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static led_state_t m_current_state = LED_STATE_OFF;
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static bool m_phase_on; /* true: LED 켜진 구간, false: 꺼진 구간 */
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/* 에러 패턴 전용 */
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static uint8_t m_error_blink_cnt; /* 현재까지 깜빡인 횟수 */
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static uint8_t m_error_phase; /* 0: blink-on, 1: blink-off, 2: pause */
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/*==============================================================================
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* GPIO 헬퍼
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*============================================================================*/
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static inline void led_green_on(void)
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{
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#if LED_ACTIVE_LOW
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nrf_gpio_pin_clear(LED_PIN_GREEN);
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#else
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nrf_gpio_pin_set(LED_PIN_GREEN);
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#endif
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}
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static inline void led_green_off(void)
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{
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#if LED_ACTIVE_LOW
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nrf_gpio_pin_set(LED_PIN_GREEN);
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#else
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nrf_gpio_pin_clear(LED_PIN_GREEN);
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#endif
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}
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static inline void led_orange_on(void)
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{
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#if LED_ACTIVE_LOW
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nrf_gpio_pin_clear(LED_PIN_ORANGE);
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#else
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nrf_gpio_pin_set(LED_PIN_ORANGE);
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#endif
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}
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static inline void led_orange_off(void)
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{
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#if LED_ACTIVE_LOW
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nrf_gpio_pin_set(LED_PIN_ORANGE);
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#else
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nrf_gpio_pin_clear(LED_PIN_ORANGE);
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#endif
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}
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static void led_all_off(void)
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{
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led_green_off();
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led_orange_off();
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}
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static void led_color_on(uint8_t color)
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{
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led_all_off();
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if (color == COLOR_GREEN) led_green_on();
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else if (color == COLOR_ORANGE) led_orange_on();
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}
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/*==============================================================================
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* 타이머 시작 헬퍼
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*============================================================================*/
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static void timer_start_ms(uint32_t ms)
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{
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if (ms == 0) return;
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app_timer_start(m_led_timer, MS_TO_TICKS(ms), NULL);
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}
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/*==============================================================================
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* 에러 패턴 state machine (No.7)
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* phase 0: LED ON (166ms) → phase 1
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* phase 1: LED OFF (166ms) → cnt++ → cnt<3 ? phase 0 : phase 2
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* phase 2: PAUSE (1000ms) → cnt=0, phase 0
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*============================================================================*/
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static void error_pattern_start(void)
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{
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m_error_blink_cnt = 0;
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m_error_phase = 0;
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led_color_on(COLOR_ORANGE);
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timer_start_ms(ERROR_BLINK_ON_MS);
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}
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static void error_pattern_tick(void)
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{
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switch (m_error_phase)
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{
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case 0: /* ON 구간 끝 → OFF */
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led_all_off();
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m_error_phase = 1;
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timer_start_ms(ERROR_BLINK_OFF_MS);
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break;
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case 1: /* OFF 구간 끝 */
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m_error_blink_cnt++;
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if (m_error_blink_cnt < ERROR_BLINK_COUNT)
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{
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/* 다시 ON */
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m_error_phase = 0;
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led_color_on(COLOR_ORANGE);
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timer_start_ms(ERROR_BLINK_ON_MS);
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}
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else
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{
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/* 3회 완료 → pause */
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m_error_phase = 2;
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timer_start_ms(ERROR_PAUSE_MS);
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}
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break;
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case 2: /* pause 끝 → 처음부터 */
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m_error_blink_cnt = 0;
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m_error_phase = 0;
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led_color_on(COLOR_ORANGE);
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timer_start_ms(ERROR_BLINK_ON_MS);
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break;
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default:
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break;
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}
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}
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/*==============================================================================
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* 타이머 콜백
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*============================================================================*/
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static void led_timer_handler(void * p_context)
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{
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(void)p_context;
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/* 에러 상태는 별도 처리 */
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if (m_current_state == LED_STATE_ERROR)
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{
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error_pattern_tick();
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return;
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}
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const led_pattern_t * p = &m_patterns[m_current_state];
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if (m_phase_on)
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{
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/* ON→OFF 전환 */
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led_all_off();
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m_phase_on = false;
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if (p->off_ms > 0)
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{
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timer_start_ms(p->off_ms);
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}
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else if (!p->repeat)
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{
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/* 1회성: off_ms == 0 이면 그냥 유지 (POWER_ON) 또는 끄기 (POWER_OFF) */
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if (m_current_state == LED_STATE_POWER_OFF)
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{
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led_all_off();
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m_current_state = LED_STATE_OFF;
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}
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/* POWER_ON: 점등 유지 상태 → 타이머 x */
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}
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}
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else
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{
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/* OFF → ON 전환 */
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if (p->repeat)
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{
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led_color_on(p->color);
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m_phase_on = true;
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timer_start_ms(p->on_ms);
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}
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/* repeat == false && off_ms > 0 인 경우는 현재 없음 */
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}
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}
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/*==============================================================================
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* 공개 함수
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*============================================================================*/
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void led_init(void)
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{
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/* GPIO 출력 설정 */
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nrf_gpio_cfg_output(LED_PIN_GREEN);
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nrf_gpio_cfg_output(LED_PIN_ORANGE);
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led_all_off();
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/* 타이머 생성 (single-shot) */
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app_timer_create(&m_led_timer, APP_TIMER_MODE_SINGLE_SHOT, led_timer_handler);
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m_current_state = LED_STATE_OFF;
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}
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void led_set_state(led_state_t state)
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{
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if (state >= LED_STATE_COUNT) return;
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/* 이전 패턴 중단 */
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app_timer_stop(m_led_timer);
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led_all_off();
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m_current_state = state;
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m_phase_on = false;
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const led_pattern_t * p = &m_patterns[state];
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switch (state)
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{
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case LED_STATE_OFF:
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/* 이미 all off */
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break;
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/* 에러 패턴: 별도 state machine */
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case LED_STATE_ERROR:
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error_pattern_start();
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break;
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/* 그 외: on 구간부터 시작 */
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default:
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led_color_on(p->color);
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m_phase_on = true;
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if (p->on_ms > 0)
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{
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timer_start_ms(p->on_ms);
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}
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break;
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}
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}
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led_state_t led_get_state(void)
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{
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return m_current_state;
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}
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