Option to disable auto 5v power for external radio module

Now you can use 3.3v modules without wasting a battery (bonus a bit low noise on power line)

applications/main/subghz/scenes/subghz_scene_ext_module_settings.c

@@ -4,6 +4,7 @@
 uint8_t value_index_exm;
 uint8_t value_index_dpin;
 uint8_t value_index_cnt;
+uint8_t value_index_pwr;
 
 #define EXT_MODULES_COUNT (sizeof(radio_modules_variables_text) / sizeof(char* const))
 const char* const radio_modules_variables_text[] = {
@@ -11,6 +12,12 @@ const char* const radio_modules_variables_text[] = {
     "External",
 };
 
+#define EXT_MOD_POWER_COUNT 2
+const char* const ext_mod_power_text[EXT_MOD_POWER_COUNT] = {
+    "ON",
+    "OFF",
+};
+
 #define DEBUG_P_COUNT 2
 const char* const debug_pin_text[DEBUG_P_COUNT] = {
     "OFF",
@@ -77,6 +84,14 @@ static void subghz_scene_receiver_config_set_debug_counter(VariableItem* item) {
     }
 }
 
+static void subghz_scene_receiver_config_set_ext_mod_power(VariableItem* item) {
+    uint8_t index = variable_item_get_current_value_index(item);
+
+    variable_item_set_current_value_text(item, ext_mod_power_text[index]);
+
+    furi_hal_subghz_set_external_power_disable(index == 1);
+}
+
 void subghz_scene_ext_module_settings_on_enter(void* context) {
     SubGhz* subghz = context;
 
@@ -92,10 +107,20 @@ void subghz_scene_ext_module_settings_on_enter(void* context) {
     variable_item_set_current_value_index(item, value_index_exm);
     variable_item_set_current_value_text(item, radio_modules_variables_text[value_index_exm]);
 
+    item = variable_item_list_add(
+        subghz->variable_item_list,
+        "Ext Radio 5v",
+        EXT_MOD_POWER_COUNT,
+        subghz_scene_receiver_config_set_ext_mod_power,
+        subghz);
+    value_index_pwr = furi_hal_subghz_get_external_power_disable();
+    variable_item_set_current_value_index(item, value_index_pwr);
+    variable_item_set_current_value_text(item, ext_mod_power_text[value_index_pwr]);
+
     if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
         item = variable_item_list_add(
             subghz->variable_item_list,
-            "Debug Pin:",
+            "Debug Pin",
             DEBUG_P_COUNT,
             subghz_scene_receiver_config_set_debug_pin,
             subghz);
@@ -105,7 +130,7 @@ void subghz_scene_ext_module_settings_on_enter(void* context) {
 
         item = variable_item_list_add(
             subghz->variable_item_list,
-            "Counter Mult:",
+            "Counter incr.",
             DEBUG_COUNTER_COUNT,
             subghz_scene_receiver_config_set_debug_counter,
             subghz);

firmware/targets/f7/api_symbols.csv

@@ -1357,6 +1357,7 @@ Function,-,furi_hal_subghz_dump_state,void,
 Function,+,furi_hal_subghz_enable_ext_power,_Bool,
 Function,+,furi_hal_subghz_flush_rx,void,
 Function,+,furi_hal_subghz_flush_tx,void,
+Function,+,furi_hal_subghz_get_external_power_disable,_Bool,
 Function,+,furi_hal_subghz_get_lqi,uint8_t,
 Function,+,furi_hal_subghz_get_radio_type,SubGhzRadioType,
 Function,+,furi_hal_subghz_get_rolling_counter_mult,uint8_t,
@@ -1377,6 +1378,7 @@ Function,+,furi_hal_subghz_reset,void,
 Function,+,furi_hal_subghz_rx,void,
 Function,+,furi_hal_subghz_rx_pipe_not_empty,_Bool,
 Function,+,furi_hal_subghz_set_async_mirror_pin,void,const GpioPin*
+Function,+,furi_hal_subghz_set_external_power_disable,void,_Bool
 Function,+,furi_hal_subghz_set_frequency,uint32_t,uint32_t
 Function,+,furi_hal_subghz_set_frequency_and_path,uint32_t,uint32_t
 Function,+,furi_hal_subghz_set_path,void,FuriHalSubGhzPath

firmware/targets/f7/furi_hal/furi_hal_subghz.c

@@ -39,6 +39,7 @@ volatile FuriHalSubGhz furi_hal_subghz = {
     .spi_bus_handle = &furi_hal_spi_bus_handle_subghz,
     .cc1101_g0_pin = &gpio_cc1101_g0,
     .rolling_counter_mult = 1,
+    .ext_module_power_disabled = false,
 };
 
 bool furi_hal_subghz_set_radio_type(SubGhzRadioType state) {
@@ -70,6 +71,14 @@ void furi_hal_subghz_set_rolling_counter_mult(uint8_t mult) {
     furi_hal_subghz.rolling_counter_mult = mult;
 }
 
+void furi_hal_subghz_set_external_power_disable(bool state) {
+    furi_hal_subghz.ext_module_power_disabled = state;
+}
+
+bool furi_hal_subghz_get_external_power_disable(void) {
+    return furi_hal_subghz.ext_module_power_disabled;
+}
+
 void furi_hal_subghz_set_async_mirror_pin(const GpioPin* pin) {
     furi_hal_subghz.async_mirror_pin = pin;
 }
@@ -79,6 +88,9 @@ void furi_hal_subghz_init(void) {
 }
 
 bool furi_hal_subghz_enable_ext_power(void) {
+    if(furi_hal_subghz.ext_module_power_disabled) {
+        return false;
+    }
     if(furi_hal_subghz.radio_type != SubGhzRadioInternal) {
         uint8_t attempts = 0;
         while(!furi_hal_power_is_otg_enabled() && attempts++ < 2) {

firmware/targets/f7/furi_hal/furi_hal_subghz.h

@@ -78,6 +78,7 @@ typedef struct {
     FuriHalSpiBusHandle* spi_bus_handle;
     const GpioPin* cc1101_g0_pin;
     uint8_t rolling_counter_mult;
+    bool ext_module_power_disabled;
 } FuriHalSubGhz;
 
 extern volatile FuriHalSubGhz furi_hal_subghz;
@@ -321,6 +322,14 @@ uint8_t furi_hal_subghz_get_rolling_counter_mult(void);
  */
 void furi_hal_subghz_set_rolling_counter_mult(uint8_t mult);
 
+/** If true - disable 5v power of the external radio module
+ */
+void furi_hal_subghz_set_external_power_disable(bool state);
+
+/** Get the current state of the external power disable flag
+ */
+bool furi_hal_subghz_get_external_power_disable(void);
+
 #ifdef __cplusplus
 }
 #endif