gpio.c

#include "gpio.h"

#define NRF_LOG_MODULE_NAME "GPIO"

#include "nrf_log.h"
#include "nrf_log_ctrl.h"

#include "nrf_delay.h"
#include "nrf_gpio.h"
#include "clock.h"
#include "encoder.h"

#define LONG_CLICK_MS 1000
#define LONG_LONG_CLICK_MS 3000
#define DOUBLE_CLICK_MS 300

static volatile uint8_t* m_gpio_button_flag;
static volatile uint8_t* m_gpio_long_button_flag;
static volatile uint8_t* m_gpio_long_long_button_flag;
static volatile uint8_t* m_gpio_double_button_flag;

static uint32_t last_click = 0;
static uint32_t pulse_start = 0;
static uint32_t pulse_stop = 0;
static uint32_t now = 0;
static uint32_t pulse_len = 0;
static uint8_t  long_timeout = 1;
static uint8_t  long_long_timeout = 1;
static uint8_t  click_timeout = 1;
static uint8_t  old_in = 0;
static uint8_t  new_in = 0;

void gpio_init() {
    nrf_gpio_cfg_input(SW_PIN,NRF_GPIO_PIN_PULLUP);
}

void gpio_button_set_flag(volatile uint8_t* main_button_flag)
{
    m_gpio_button_flag = main_button_flag;
}

void gpio_long_button_set_flag(volatile uint8_t* main_long_button_flag)
{
    m_gpio_long_button_flag = main_long_button_flag;
}

void gpio_long_long_button_set_flag(volatile uint8_t* main_long_long_button_flag)
{
    m_gpio_long_long_button_flag = main_long_long_button_flag;
}

void gpio_double_button_set_flag(volatile uint8_t* main_double_button_flag)
{
    m_gpio_double_button_flag = main_double_button_flag;
}

void gpio_process(void) {

    new_in = nrf_gpio_pin_read(SW_PIN);
    nrf_delay_ms(1);
    if (new_in != nrf_gpio_pin_read(SW_PIN)){
        return;
    }

    if (new_in){
      encoder_play();
    } else {
      encoder_pause();
    }

    now = clock_get_timestamp();

    if (old_in != new_in){
      if (!new_in){
        pulse_start = now;
        click_timeout = 0;
        long_timeout = 0;
        long_long_timeout = 0;
      } else {
        pulse_stop = now;
        pulse_len = pulse_stop - pulse_start;
        if (pulse_len < LONG_LONG_CLICK_MS){
          if ((now - last_click) <= DOUBLE_CLICK_MS){
            *m_gpio_double_button_flag = 1;
            NRF_LOG_INFO("double_button!\r\n");
            click_timeout = 1;
          }
          last_click = now;
        }
        long_timeout = 0;
        long_long_timeout = 0;
      }
    }

    if (new_in && (now >= (last_click + DOUBLE_CLICK_MS)) && !click_timeout){
      *m_gpio_button_flag = 1;
      NRF_LOG_INFO("simple_button!\r\n");
      click_timeout = 1;
      long_timeout = 1;
      long_long_timeout = 1;
    }

    if (!new_in && !long_timeout){
      pulse_len = now - pulse_start;
      if (pulse_len > LONG_CLICK_MS){
        *m_gpio_long_button_flag = 1;
        NRF_LOG_INFO("long_button!\r\n");
        long_timeout = 1;
        click_timeout = 1;
      }
    }

    if (!new_in && !long_long_timeout){
      pulse_len = now - pulse_start;
      if (pulse_len > LONG_LONG_CLICK_MS){
        *m_gpio_long_long_button_flag = 1;
        NRF_LOG_INFO("long_long_button!\r\n");
        long_timeout = 1;
        long_long_timeout = 1;
        click_timeout = 1;
      }
    }

    old_in = new_in;
    NRF_LOG_FLUSH();
};