[FL-3762] Configurable Infrared TX output (#3484)

* Implement Gui for the feature
* Implement furi_hal side
* Implement IR module detection
* Fix PVS warnings
* Add comments

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

applications/main/infrared/infrared_app.c

@@ -1,7 +1,10 @@
 #include "infrared_app_i.h"
 
+#include <furi_hal_power.h>
+
 #include <string.h>
 #include <toolbox/path.h>
+#include <toolbox/saved_struct.h>
 #include <dolphin/dolphin.h>
 
 #define TAG "InfraredApp"
@@ -9,6 +12,14 @@
 #define INFRARED_TX_MIN_INTERVAL_MS (50U)
 #define INFRARED_TASK_STACK_SIZE (2048UL)
 
+#define INFRARED_SETTINGS_PATH INT_PATH(".infrared.settings")
+#define INFRARED_SETTINGS_VERSION (0)
+#define INFRARED_SETTINGS_MAGIC (0x1F)
+
+typedef struct {
+    uint8_t tx_pin;
+} InfraredSettings;
+
 static const NotificationSequence*
     infrared_notification_sequences[InfraredNotificationMessageCount] = {
         &sequence_success,
@@ -181,6 +192,12 @@ static InfraredApp* infrared_alloc(void) {
     infrared->popup = popup_alloc();
     view_dispatcher_add_view(view_dispatcher, InfraredViewPopup, popup_get_view(infrared->popup));
 
+    infrared->var_item_list = variable_item_list_alloc();
+    view_dispatcher_add_view(
+        view_dispatcher,
+        InfraredViewVariableList,
+        variable_item_list_get_view(infrared->var_item_list));
+
     infrared->view_stack = view_stack_alloc();
     view_dispatcher_add_view(
         view_dispatcher, InfraredViewStack, view_stack_get_view(infrared->view_stack));
@@ -237,6 +254,9 @@ static void infrared_free(InfraredApp* infrared) {
     view_dispatcher_remove_view(view_dispatcher, InfraredViewPopup);
     popup_free(infrared->popup);
 
+    view_dispatcher_remove_view(view_dispatcher, InfraredViewVariableList);
+    variable_item_list_free(infrared->var_item_list);
+
     view_dispatcher_remove_view(view_dispatcher, InfraredViewStack);
     view_stack_free(infrared->view_stack);
 
@@ -431,6 +451,60 @@ void infrared_show_error_message(const InfraredApp* infrared, const char* fmt, .
     va_end(args);
 }
 
+void infrared_set_tx_pin(InfraredApp* infrared, FuriHalInfraredTxPin tx_pin) {
+    if(tx_pin < FuriHalInfraredTxPinMax) {
+        furi_hal_infrared_set_tx_output(tx_pin);
+    } else {
+        FuriHalInfraredTxPin tx_pin_detected = furi_hal_infrared_detect_tx_output();
+        furi_hal_infrared_set_tx_output(tx_pin_detected);
+        if(tx_pin_detected != FuriHalInfraredTxPinInternal) {
+            infrared_enable_otg(infrared, true);
+        }
+    }
+
+    infrared->app_state.tx_pin = tx_pin;
+}
+
+void infrared_enable_otg(InfraredApp* infrared, bool enable) {
+    if(enable) {
+        furi_hal_power_enable_otg();
+    } else {
+        furi_hal_power_disable_otg();
+    }
+    infrared->app_state.is_otg_enabled = enable;
+}
+
+static void infrared_load_settings(InfraredApp* infrared) {
+    InfraredSettings settings = {0};
+
+    if(!saved_struct_load(
+           INFRARED_SETTINGS_PATH,
+           &settings,
+           sizeof(InfraredSettings),
+           INFRARED_SETTINGS_MAGIC,
+           INFRARED_SETTINGS_VERSION)) {
+        FURI_LOG_D(TAG, "Failed to load settings, using defaults");
+        infrared_save_settings(infrared);
+    }
+
+    infrared_set_tx_pin(infrared, settings.tx_pin);
+}
+
+void infrared_save_settings(InfraredApp* infrared) {
+    InfraredSettings settings = {
+        .tx_pin = infrared->app_state.tx_pin,
+    };
+
+    if(!saved_struct_save(
+           INFRARED_SETTINGS_PATH,
+           &settings,
+           sizeof(InfraredSettings),
+           INFRARED_SETTINGS_MAGIC,
+           INFRARED_SETTINGS_VERSION)) {
+        FURI_LOG_E(TAG, "Failed to save settings");
+    }
+}
+
 void infrared_signal_received_callback(void* context, InfraredWorkerSignal* received_signal) {
     furi_assert(context);
     InfraredApp* infrared = context;
@@ -471,6 +545,7 @@ void infrared_popup_closed_callback(void* context) {
 int32_t infrared_app(void* p) {
     InfraredApp* infrared = infrared_alloc();
 
+    infrared_load_settings(infrared);
     infrared_make_app_folder(infrared);
 
     bool is_remote_loaded = false;
@@ -513,6 +588,9 @@ int32_t infrared_app(void* p) {
 
     view_dispatcher_run(infrared->view_dispatcher);
 
+    infrared_set_tx_pin(infrared, FuriHalInfraredTxPinInternal);
+    infrared_enable_otg(infrared, false);
     infrared_free(infrared);
+
     return 0;
 }

applications/main/infrared/infrared_app_i.h

@@ -4,6 +4,8 @@
  */
 #pragma once
 
+#include <furi_hal_infrared.h>
+
 #include <gui/gui.h>
 #include <gui/view.h>
 #include <assets_icons.h>
@@ -18,13 +20,13 @@
 #include <gui/modules/text_input.h>
 #include <gui/modules/button_menu.h>
 #include <gui/modules/button_panel.h>
+#include <gui/modules/variable_item_list.h>
 
 #include <rpc/rpc_app.h>
 #include <storage/storage.h>
 #include <dialogs/dialogs.h>
 
 #include <notification/notification_messages.h>
-
 #include <infrared/worker/infrared_worker.h>
 
 #include "infrared_app.h"
@@ -82,11 +84,13 @@ typedef struct {
     bool is_learning_new_remote; /**< Learning new remote or adding to an existing one. */
     bool is_debug_enabled; /**< Whether to enable or disable debugging features. */
     bool is_transmitting; /**< Whether a signal is currently being transmitted. */
+    bool is_otg_enabled; /**< Whether OTG power (external 5V) is enabled. */
     InfraredEditTarget edit_target : 8; /**< Selected editing target (a remote or a button). */
     InfraredEditMode edit_mode : 8; /**< Selected editing operation (rename or delete). */
     int32_t current_button_index; /**< Selected button index (move destination). */
     int32_t prev_button_index; /**< Previous button index (move source). */
     uint32_t last_transmit_time; /**< Lat time a signal was transmitted. */
+    FuriHalInfraredTxPin tx_pin;
 } InfraredAppState;
 
 /**
@@ -110,6 +114,7 @@ struct InfraredApp {
     DialogEx* dialog_ex; /**< Standard view for displaying dialogs. */
     ButtonMenu* button_menu; /**< Custom view for interacting with IR remotes. */
     Popup* popup; /**< Standard view for displaying messages. */
+    VariableItemList* var_item_list; /**< Standard view for displaying menus of choice items. */
 
     ViewStack* view_stack; /**< Standard view for displaying stacked interfaces. */
     InfraredDebugView* debug_view; /**< Custom view for displaying debug information. */
@@ -138,6 +143,7 @@ typedef enum {
     InfraredViewDialogEx,
     InfraredViewButtonMenu,
     InfraredViewPopup,
+    InfraredViewVariableList,
     InfraredViewStack,
     InfraredViewDebugView,
     InfraredViewMove,
@@ -273,6 +279,32 @@ void infrared_play_notification_message(
 void infrared_show_error_message(const InfraredApp* infrared, const char* fmt, ...)
     _ATTRIBUTE((__format__(__printf__, 2, 3)));
 
+/**
+ * @brief Set which pin will be used to transmit infrared signals.
+ *
+ * Setting tx_pin to InfraredTxPinInternal will enable transmission via
+ * the built-in infrared LEDs.
+ *
+ * @param[in] infrared pointer to the application instance.
+ * @param[in] tx_pin pin to be used for signal transmission.
+ */
+void infrared_set_tx_pin(InfraredApp* infrared, FuriHalInfraredTxPin tx_pin);
+
+/**
+ * @brief Enable or disable 5V at the GPIO pin 1.
+ *
+ * @param[in] infrared pointer to the application instance.
+ * @param[in] enable boolean value corresponding to OTG state (true = enable, false = disable)
+ */
+void infrared_enable_otg(InfraredApp* infrared, bool enable);
+
+/**
+ * @brief Save current settings to a file.
+ *
+ * @param[in] infrared pointer to the application instance.
+ */
+void infrared_save_settings(InfraredApp* infrared);
+
 /**
  * @brief Common received signal callback.
  *

applications/main/infrared/infrared_custom_event.h

@@ -22,6 +22,9 @@ enum InfraredCustomEventType {
     InfraredCustomEventTypeRpcButtonPressIndex,
     InfraredCustomEventTypeRpcButtonRelease,
     InfraredCustomEventTypeRpcSessionClose,
+
+    InfraredCustomEventTypeGpioTxPinChanged,
+    InfraredCustomEventTypeGpioOtgChanged,
 };
 
 #pragma pack(push, 1)

applications/main/infrared/scenes/infrared_scene_config.h

@@ -19,6 +19,7 @@ ADD_SCENE(infrared, universal_tv, UniversalTV)
 ADD_SCENE(infrared, universal_ac, UniversalAC)
 ADD_SCENE(infrared, universal_audio, UniversalAudio)
 ADD_SCENE(infrared, universal_projector, UniversalProjector)
+ADD_SCENE(infrared, gpio_settings, GpioSettings)
 ADD_SCENE(infrared, debug, Debug)
 ADD_SCENE(infrared, error_databases, ErrorDatabases)
 ADD_SCENE(infrared, rpc, Rpc)

applications/main/infrared/scenes/infrared_scene_gpio_settings.c

@@ -0,0 +1,102 @@
+#include "../infrared_app_i.h"
+
+static const char* infrared_scene_gpio_settings_pin_text[] = {
+    "Flipper",
+    "2 (A7)",
+    "Detect",
+};
+
+static const char* infrared_scene_gpio_settings_otg_text[] = {
+    "OFF",
+    "ON",
+};
+
+static void infrared_scene_gpio_settings_pin_change_callback(VariableItem* item) {
+    InfraredApp* infrared = variable_item_get_context(item);
+    const uint8_t index = variable_item_get_current_value_index(item);
+
+    variable_item_set_current_value_text(item, infrared_scene_gpio_settings_pin_text[index]);
+    view_dispatcher_send_custom_event(
+        infrared->view_dispatcher,
+        infrared_custom_event_pack(InfraredCustomEventTypeGpioTxPinChanged, index));
+}
+
+static void infrared_scene_gpio_settings_otg_change_callback(VariableItem* item) {
+    InfraredApp* infrared = variable_item_get_context(item);
+    const uint8_t index = variable_item_get_current_value_index(item);
+
+    variable_item_set_current_value_text(item, infrared_scene_gpio_settings_otg_text[index]);
+    view_dispatcher_send_custom_event(
+        infrared->view_dispatcher,
+        infrared_custom_event_pack(InfraredCustomEventTypeGpioOtgChanged, index));
+}
+
+static void infrared_scene_gpio_settings_init(InfraredApp* infrared) {
+    VariableItemList* var_item_list = infrared->var_item_list;
+    VariableItem* item;
+    uint8_t value_index;
+
+    item = variable_item_list_add(
+        var_item_list,
+        "Signal Output",
+        COUNT_OF(infrared_scene_gpio_settings_pin_text),
+        infrared_scene_gpio_settings_pin_change_callback,
+        infrared);
+
+    value_index = infrared->app_state.tx_pin;
+    variable_item_set_current_value_index(item, value_index);
+    variable_item_set_current_value_text(item, infrared_scene_gpio_settings_pin_text[value_index]);
+
+    item = variable_item_list_add(
+        var_item_list,
+        "5V on GPIO",
+        COUNT_OF(infrared_scene_gpio_settings_otg_text),
+        infrared_scene_gpio_settings_otg_change_callback,
+        infrared);
+
+    if(infrared->app_state.tx_pin < FuriHalInfraredTxPinMax) {
+        value_index = infrared->app_state.is_otg_enabled;
+        variable_item_set_current_value_index(item, value_index);
+        variable_item_set_current_value_text(
+            item, infrared_scene_gpio_settings_otg_text[value_index]);
+    } else {
+        variable_item_set_values_count(item, 1);
+        variable_item_set_current_value_index(item, 0);
+        variable_item_set_current_value_text(item, "Auto");
+    }
+}
+
+void infrared_scene_gpio_settings_on_enter(void* context) {
+    InfraredApp* infrared = context;
+    infrared_scene_gpio_settings_init(infrared);
+    view_dispatcher_switch_to_view(infrared->view_dispatcher, InfraredViewVariableList);
+}
+
+bool infrared_scene_gpio_settings_on_event(void* context, SceneManagerEvent event) {
+    bool consumed = false;
+
+    InfraredApp* infrared = context;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        const uint16_t custom_event_type = infrared_custom_event_get_type(event.event);
+        const uint16_t custom_event_value = infrared_custom_event_get_value(event.event);
+
+        if(custom_event_type == InfraredCustomEventTypeGpioTxPinChanged) {
+            infrared_set_tx_pin(infrared, custom_event_value);
+            variable_item_list_reset(infrared->var_item_list);
+            infrared_scene_gpio_settings_init(infrared);
+        } else if(custom_event_type == InfraredCustomEventTypeGpioOtgChanged) {
+            infrared_enable_otg(infrared, custom_event_value);
+        }
+
+        consumed = true;
+    }
+
+    return consumed;
+}
+
+void infrared_scene_gpio_settings_on_exit(void* context) {
+    InfraredApp* infrared = context;
+    variable_item_list_reset(infrared->var_item_list);
+    infrared_save_settings(infrared);
+}

applications/main/infrared/scenes/infrared_scene_start.c

@@ -4,6 +4,7 @@ enum SubmenuIndex {
     SubmenuIndexUniversalRemotes,
     SubmenuIndexLearnNewRemote,
     SubmenuIndexSavedRemotes,
+    SubmenuIndexGpioSettings,
     SubmenuIndexDebug
 };
 
@@ -35,6 +36,12 @@ void infrared_scene_start_on_enter(void* context) {
         SubmenuIndexSavedRemotes,
         infrared_scene_start_submenu_callback,
         infrared);
+    submenu_add_item(
+        submenu,
+        "GPIO Settings",
+        SubmenuIndexGpioSettings,
+        infrared_scene_start_submenu_callback,
+        infrared);
 
     if(infrared->app_state.is_debug_enabled) {
         submenu_add_item(
@@ -60,19 +67,19 @@ bool infrared_scene_start_on_event(void* context, SceneManagerEvent event) {
         scene_manager_set_scene_state(scene_manager, InfraredSceneStart, submenu_index);
         if(submenu_index == SubmenuIndexUniversalRemotes) {
             scene_manager_next_scene(scene_manager, InfraredSceneUniversal);
-            consumed = true;
         } else if(submenu_index == SubmenuIndexLearnNewRemote) {
             infrared->app_state.is_learning_new_remote = true;
             scene_manager_next_scene(scene_manager, InfraredSceneLearn);
-            consumed = true;
         } else if(submenu_index == SubmenuIndexSavedRemotes) {
             furi_string_set(infrared->file_path, INFRARED_APP_FOLDER);
             scene_manager_next_scene(scene_manager, InfraredSceneRemoteList);
-            consumed = true;
+        } else if(submenu_index == SubmenuIndexGpioSettings) {
+            scene_manager_next_scene(scene_manager, InfraredSceneGpioSettings);
         } else if(submenu_index == SubmenuIndexDebug) {
             scene_manager_next_scene(scene_manager, InfraredSceneDebug);
-            consumed = true;
         }
+
+        consumed = true;
     }
 
     return consumed;

targets/f18/api_symbols.csv

@@ -1,5 +1,5 @@
 entry,status,name,type,params
-Version,+,60.2,,
+Version,+,60.3,,
 Header,+,applications/services/bt/bt_service/bt.h,,
 Header,+,applications/services/cli/cli.h,,
 Header,+,applications/services/cli/cli_vcp.h,,

targets/f7/api_symbols.csv

@@ -1,5 +1,5 @@
 entry,status,name,type,params
-Version,+,60.2,,
+Version,+,60.3,,
 Header,+,applications/drivers/subghz/cc1101_ext/cc1101_ext_interconnect.h,,
 Header,+,applications/services/bt/bt_service/bt.h,,
 Header,+,applications/services/cli/cli.h,,
@@ -1324,7 +1324,9 @@ Function,+,furi_hal_infrared_async_tx_set_signal_sent_isr_callback,void,"FuriHal
 Function,+,furi_hal_infrared_async_tx_start,void,"uint32_t, float"
 Function,+,furi_hal_infrared_async_tx_stop,void,
 Function,+,furi_hal_infrared_async_tx_wait_termination,void,
+Function,+,furi_hal_infrared_detect_tx_output,FuriHalInfraredTxPin,
 Function,+,furi_hal_infrared_is_busy,_Bool,
+Function,+,furi_hal_infrared_set_tx_output,void,FuriHalInfraredTxPin
 Function,-,furi_hal_init,void,
 Function,-,furi_hal_init_early,void,
 Function,-,furi_hal_interrupt_init,void,

targets/f7/furi_hal/furi_hal_infrared.c

@@ -1,6 +1,7 @@
 #include <furi_hal_infrared.h>
 #include <furi_hal_interrupt.h>
 #include <furi_hal_resources.h>
+#include <furi_hal_cortex.h>
 #include <furi_hal_bus.h>
 
 #include <stm32wbxx_ll_tim.h>
@@ -9,12 +10,6 @@
 #include <furi.h>
 #include <math.h>
 
-// #define INFRARED_TX_DEBUG
-
-#if defined INFRARED_TX_DEBUG
-#define gpio_infrared_tx gpio_ext_pa7
-#endif
-
 #define INFRARED_TIM_TX_DMA_BUFFER_SIZE 200
 #define INFRARED_POLARITY_SHIFT 1
 
@@ -81,10 +76,16 @@ typedef enum {
     InfraredStateMAX,
 } InfraredState;
 
+static FuriHalInfraredTxPin infrared_tx_output = FuriHalInfraredTxPinInternal;
 static volatile InfraredState furi_hal_infrared_state = InfraredStateIdle;
 static InfraredTimTx infrared_tim_tx;
 static InfraredTimRx infrared_tim_rx;
 
+static const GpioPin* infrared_tx_pins[FuriHalInfraredTxPinMax] = {
+    [FuriHalInfraredTxPinInternal] = &gpio_infrared_tx,
+    [FuriHalInfraredTxPinExtPA7] = &gpio_ext_pa7,
+};
+
 static void furi_hal_infrared_tx_fill_buffer(uint8_t buf_num, uint8_t polarity_shift);
 static void furi_hal_infrared_async_tx_free_resources(void);
 static void furi_hal_infrared_tx_dma_set_polarity(uint8_t buf_num, uint8_t polarity_shift);
@@ -352,27 +353,31 @@ static void furi_hal_infrared_configure_tim_pwm_tx(uint32_t freq, float duty_cyc
     LL_TIM_SetAutoReload(
         INFRARED_DMA_TIMER,
         __LL_TIM_CALC_ARR(SystemCoreClock, LL_TIM_GetPrescaler(INFRARED_DMA_TIMER), freq));
-#if defined INFRARED_TX_DEBUG
+
-    LL_TIM_OC_SetCompareCH1(
+    if(infrared_tx_output == FuriHalInfraredTxPinInternal) {
-        INFRARED_DMA_TIMER, ((LL_TIM_GetAutoReload(INFRARED_DMA_TIMER) + 1) * (1 - duty_cycle)));
+        LL_TIM_OC_SetCompareCH3(
-    LL_TIM_OC_EnablePreload(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH1);
+            INFRARED_DMA_TIMER,
-    /* LL_TIM_OCMODE_PWM2 set by DMA */
+            ((LL_TIM_GetAutoReload(INFRARED_DMA_TIMER) + 1) * (1 - duty_cycle)));
-    LL_TIM_OC_SetMode(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH1, LL_TIM_OCMODE_FORCED_INACTIVE);
+        LL_TIM_OC_EnablePreload(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH3);
-    LL_TIM_OC_SetPolarity(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH1N, LL_TIM_OCPOLARITY_HIGH);
+        /* LL_TIM_OCMODE_PWM2 set by DMA */
-    LL_TIM_OC_DisableFast(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH1);
+        LL_TIM_OC_SetMode(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH3, LL_TIM_OCMODE_FORCED_INACTIVE);
-    LL_TIM_CC_EnableChannel(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH1N);
+        LL_TIM_OC_SetPolarity(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH3N, LL_TIM_OCPOLARITY_HIGH);
-    LL_TIM_DisableIT_CC1(INFRARED_DMA_TIMER);
+        LL_TIM_OC_DisableFast(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH3);
-#else
+        LL_TIM_CC_EnableChannel(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH3N);
-    LL_TIM_OC_SetCompareCH3(
+        LL_TIM_DisableIT_CC3(INFRARED_DMA_TIMER);
-        INFRARED_DMA_TIMER, ((LL_TIM_GetAutoReload(INFRARED_DMA_TIMER) + 1) * (1 - duty_cycle)));
+    } else if(infrared_tx_output == FuriHalInfraredTxPinExtPA7) {
-    LL_TIM_OC_EnablePreload(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH3);
+        LL_TIM_OC_SetCompareCH1(
-    /* LL_TIM_OCMODE_PWM2 set by DMA */
+            INFRARED_DMA_TIMER,
-    LL_TIM_OC_SetMode(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH3, LL_TIM_OCMODE_FORCED_INACTIVE);
+            ((LL_TIM_GetAutoReload(INFRARED_DMA_TIMER) + 1) * (1 - duty_cycle)));
-    LL_TIM_OC_SetPolarity(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH3N, LL_TIM_OCPOLARITY_HIGH);
+        LL_TIM_OC_EnablePreload(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH1);
-    LL_TIM_OC_DisableFast(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH3);
+        /* LL_TIM_OCMODE_PWM2 set by DMA */
-    LL_TIM_CC_EnableChannel(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH3N);
+        LL_TIM_OC_SetMode(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH1, LL_TIM_OCMODE_FORCED_INACTIVE);
-    LL_TIM_DisableIT_CC3(INFRARED_DMA_TIMER);
+        LL_TIM_OC_SetPolarity(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH1N, LL_TIM_OCPOLARITY_HIGH);
-#endif
+        LL_TIM_OC_DisableFast(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH1);
+        LL_TIM_CC_EnableChannel(INFRARED_DMA_TIMER, LL_TIM_CHANNEL_CH1N);
+        LL_TIM_DisableIT_CC1(INFRARED_DMA_TIMER);
+    }
+
     LL_TIM_DisableMasterSlaveMode(INFRARED_DMA_TIMER);
     LL_TIM_EnableAllOutputs(INFRARED_DMA_TIMER);
     LL_TIM_DisableIT_UPDATE(INFRARED_DMA_TIMER);
@@ -381,11 +386,13 @@ static void furi_hal_infrared_configure_tim_pwm_tx(uint32_t freq, float duty_cyc
 
 static void furi_hal_infrared_configure_tim_cmgr2_dma_tx(void) {
     LL_DMA_InitTypeDef dma_config = {0};
-#if defined INFRARED_TX_DEBUG
+
-    dma_config.PeriphOrM2MSrcAddress = (uint32_t) & (INFRARED_DMA_TIMER->CCMR1);
+    if(infrared_tx_output == FuriHalInfraredTxPinInternal) {
-#else
+        dma_config.PeriphOrM2MSrcAddress = (uint32_t)(&(INFRARED_DMA_TIMER->CCMR2));
-    dma_config.PeriphOrM2MSrcAddress = (uint32_t) & (INFRARED_DMA_TIMER->CCMR2);
+    } else if(infrared_tx_output == FuriHalInfraredTxPinExtPA7) {
-#endif
+        dma_config.PeriphOrM2MSrcAddress = (uint32_t)(&(INFRARED_DMA_TIMER->CCMR1));
+    }
+
     dma_config.MemoryOrM2MDstAddress = (uint32_t)NULL;
     dma_config.Direction = LL_DMA_DIRECTION_MEMORY_TO_PERIPH;
     dma_config.Mode = LL_DMA_MODE_NORMAL;
@@ -582,7 +589,8 @@ static void furi_hal_infrared_async_tx_free_resources(void) {
         (furi_hal_infrared_state == InfraredStateIdle) ||
         (furi_hal_infrared_state == InfraredStateAsyncTxStopped));
 
-    furi_hal_gpio_init(&gpio_infrared_tx, GpioModeAnalog, GpioPullDown, GpioSpeedLow);
+    furi_hal_gpio_init(
+        infrared_tx_pins[infrared_tx_output], GpioModeAnalog, GpioPullDown, GpioSpeedLow);
     furi_hal_interrupt_set_isr(INFRARED_DMA_CH1_IRQ, NULL, NULL);
     furi_hal_interrupt_set_isr(INFRARED_DMA_CH2_IRQ, NULL, NULL);
 
@@ -643,10 +651,11 @@ void furi_hal_infrared_async_tx_start(uint32_t freq, float duty_cycle) {
     furi_delay_us(5);
     LL_TIM_GenerateEvent_UPDATE(INFRARED_DMA_TIMER); /* DMA -> TIMx_RCR */
     furi_delay_us(5);
-    LL_GPIO_ResetOutputPin(
+
-        gpio_infrared_tx.port, gpio_infrared_tx.pin); /* when disable it prevents false pulse */
+    const GpioPin* tx_gpio = infrared_tx_pins[infrared_tx_output];
+    LL_GPIO_ResetOutputPin(tx_gpio->port, tx_gpio->pin); /* when disable it prevents false pulse */
     furi_hal_gpio_init_ex(
-        &gpio_infrared_tx, GpioModeAltFunctionPushPull, GpioPullUp, GpioSpeedHigh, GpioAltFn1TIM1);
+        tx_gpio, GpioModeAltFunctionPushPull, GpioPullUp, GpioSpeedHigh, GpioAltFn1TIM1);
 
     FURI_CRITICAL_ENTER();
     LL_TIM_GenerateEvent_UPDATE(INFRARED_DMA_TIMER); /* TIMx_RCR -> Repetition counter */
@@ -691,3 +700,23 @@ void furi_hal_infrared_async_tx_set_signal_sent_isr_callback(
     infrared_tim_tx.signal_sent_callback = callback;
     infrared_tim_tx.signal_sent_context = context;
 }
+
+FuriHalInfraredTxPin furi_hal_infrared_detect_tx_output(void) {
+    for(FuriHalInfraredTxPin pin = FuriHalInfraredTxPinInternal + 1; //-V1008
+        pin < FuriHalInfraredTxPinMax;
+        ++pin) {
+        const GpioPin* gpio = infrared_tx_pins[pin];
+        furi_hal_gpio_init(gpio, GpioModeInput, GpioPullUp, GpioSpeedLow);
+        furi_hal_cortex_delay_us(1000U);
+        const bool level = furi_hal_gpio_read(gpio);
+        furi_hal_gpio_init(gpio, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
+        if(!level) return pin;
+    }
+
+    return FuriHalInfraredTxPinInternal;
+}
+
+void furi_hal_infrared_set_tx_output(FuriHalInfraredTxPin tx_pin) {
+    furi_check(tx_pin < FuriHalInfraredTxPinMax);
+    infrared_tx_output = tx_pin;
+}

targets/furi_hal_include/furi_hal_infrared.h

@@ -16,6 +16,12 @@ extern "C" {
 #define INFRARED_MAX_FREQUENCY 56000
 #define INFRARED_MIN_FREQUENCY 10000
 
+typedef enum {
+    FuriHalInfraredTxPinInternal,
+    FuriHalInfraredTxPinExtPA7,
+    FuriHalInfraredTxPinMax,
+} FuriHalInfraredTxPin;
+
 typedef enum {
     FuriHalInfraredTxGetDataStateOk, /**< New data obtained */
     FuriHalInfraredTxGetDataStateDone, /**< New data obtained, and this is end of package */
@@ -143,6 +149,29 @@ void furi_hal_infrared_async_tx_set_signal_sent_isr_callback(
     FuriHalInfraredTxSignalSentISRCallback callback,
     void* context);
 
+/** Detect which pin has an external IR module connected.
+ *
+ * External IR modules are detected by enabling a weak pull-up
+ * on supported pins and testing whether the input is still low.
+ *
+ * This method works best on modules that employ a FET with a
+ * strong pull-down or a BJT for driving IR LEDs.
+ *
+ * The module MUST pull the input voltage down to at least 0.9V
+ * or lower in order for it to be detected.
+ *
+ * If no module has been detected, FuriHalInfraredTxPinInternal is returned.
+ *
+ * @return numeric identifier of the first pin with a module detected.
+ */
+FuriHalInfraredTxPin furi_hal_infrared_detect_tx_output(void);
+
+/** Set which pin will be used to transmit infrared signals.
+ *
+ * @param[in]   tx_pin  pin to be used for signal transmission.
+ */
+void furi_hal_infrared_set_tx_output(FuriHalInfraredTxPin tx_pin);
+
 #ifdef __cplusplus
 }
 #endif