unleashed-firmware/applications/external/pocsag_pager/helpers/radio_device_loader.c

#include "radio_device_loader.h"

#include <applications/drivers/subghz/cc1101_ext/cc1101_ext_interconnect.h>
#include <lib/subghz/devices/cc1101_int/cc1101_int_interconnect.h>

static void radio_device_loader_power_on() {
    uint8_t attempts = 0;
    while(!furi_hal_power_is_otg_enabled() && attempts++ < 5) {
        furi_hal_power_enable_otg();
        //CC1101 power-up time
        furi_delay_ms(10);
    }
}

static void radio_device_loader_power_off() {
    if(furi_hal_power_is_otg_enabled()) furi_hal_power_disable_otg();
}

bool radio_device_loader_is_connect_external(const char* name) {
    bool is_connect = false;
    bool is_otg_enabled = furi_hal_power_is_otg_enabled();

    if(!is_otg_enabled) {
        radio_device_loader_power_on();
    }

    is_connect = subghz_devices_is_connect(subghz_devices_get_by_name(name));

    if(!is_otg_enabled) {
        radio_device_loader_power_off();
    }
    return is_connect;
}

const SubGhzDevice* radio_device_loader_set(
    const SubGhzDevice* current_radio_device,
    SubGhzRadioDeviceType radio_device_type) {
    const SubGhzDevice* radio_device;

    if(radio_device_type == SubGhzRadioDeviceTypeExternalCC1101 &&
       radio_device_loader_is_connect_external(SUBGHZ_DEVICE_CC1101_EXT_NAME)) {
        radio_device_loader_power_on();
        radio_device = subghz_devices_get_by_name(SUBGHZ_DEVICE_CC1101_EXT_NAME);
        subghz_devices_begin(radio_device);
    } else if(current_radio_device == NULL) {
        radio_device = subghz_devices_get_by_name(SUBGHZ_DEVICE_CC1101_INT_NAME);
    } else {
        radio_device_loader_end(current_radio_device);
        radio_device = subghz_devices_get_by_name(SUBGHZ_DEVICE_CC1101_INT_NAME);
    }

    return radio_device;
}

bool radio_device_loader_is_external(const SubGhzDevice* radio_device) {
    furi_assert(radio_device);
    return (radio_device != subghz_devices_get_by_name(SUBGHZ_DEVICE_CC1101_INT_NAME));
}

void radio_device_loader_end(const SubGhzDevice* radio_device) {
    furi_assert(radio_device);
    radio_device_loader_power_off();
    if(radio_device != subghz_devices_get_by_name(SUBGHZ_DEVICE_CC1101_INT_NAME)) {
        subghz_devices_end(radio_device);
    }
}