7、nRF52xx蓝牙学习（nrf_gpiote.c库函数学习）

续前一篇文章。

3、nrfx_gpiote_in_event_enable

void nrfx_gpiote_in_event_enable(nrfx_gpiote_pin_t pin, bool int_enable) {     NRFX_ASSERT(nrf_gpio_pin_present_check(pin));     NRFX_ASSERT(pin_in_use_by_gpiote(pin));     if (pin_in_use_by_port(pin))     {         nrf_gpiote_polarity_t polarity =             port_handler_polarity_get(channel_port_get(pin) - GPIOTE_CH_NUM);         nrf_gpio_pin_sense_t sense;         if (polarity == NRF_GPIOTE_POLARITY_TOGGLE)         {             /* read current pin state and set for next sense to oposit */             sense = (nrf_gpio_pin_read(pin)) ?                     NRF_GPIO_PIN_SENSE_LOW : NRF_GPIO_PIN_SENSE_HIGH;         }         else         {             sense = (polarity == NRF_GPIOTE_POLARITY_LOTOHI) ?                     NRF_GPIO_PIN_SENSE_HIGH : NRF_GPIO_PIN_SENSE_LOW;         }         nrf_gpio_cfg_sense_set(pin, sense);     }     else if (pin_in_use_by_te(pin))     {         int32_t             channel = (int32_t)channel_port_get(pin);         nrf_gpiote_events_t event   = TE_IDX_TO_EVENT_ADDR((uint32_t)channel);          nrf_gpiote_event_enable((uint32_t)channel);          nrf_gpiote_event_clear(event);         if (int_enable)         {             nrfx_gpiote_evt_handler_t handler = channel_handler_get((uint32_t)channel_port_get(pin));             // Enable the interrupt only if event handler was provided.             if (handler)             {                 nrf_gpiote_int_enable(1 << channel);             }         }     } }

一、函数概述
nrfx_gpiote_in_event_enable 函数的主要功能是为指定的 GPIO 引脚启用 GPIOTE（通用外设中断和事件）输入事件。
该函数会根据引脚的使用情况（是由端口处理还是由定时器事件处理）来配置相应的引脚感应和事件中断。&nb