Implement faster flash (921600 baud)

Update esp-serial-flasher lib as submodule, which includes write
block retries to enable higher baud rates

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "lib/esp-serial-flasher"]
+	path = lib/esp-serial-flasher
+	url = [email protected]:0xchocolate/esp-serial-flasher.git

application.fam

@@ -1,7 +1,7 @@
 App(
     appid="esp_flasher",
     name="ESP Flasher",
-    fap_version=(1,3),
+    fap_version=(1,4),
     apptype=FlipperAppType.EXTERNAL,
     entry_point="esp_flasher_app",
     requires=["gui"],
@@ -22,7 +22,7 @@ App(
                     "src/slip.c"
                 ],
                 cincludes=["lib/esp-serial-flasher/private_include"],
-                cdefines=["SERIAL_FLASHER_INTERFACE_UART=1", "MD5_ENABLED=1"],
+                cdefines=["SERIAL_FLASHER_INTERFACE_UART=1", "MD5_ENABLED=1", "SERIAL_FLASHER_WRITE_BLOCK_RETRIES=10"],
             ),
         ],
     cdefines=["SERIAL_FLASHER_INTERFACE_UART=1"],

esp_flasher_app.c

@@ -69,6 +69,8 @@ EspFlasherApp* esp_flasher_app_alloc() {
     app->reset = false;
     app->boot = false;
 
+    app->turbospeed = false;
+
     scene_manager_next_scene(app->scene_manager, EspFlasherSceneStart);
 
     return app;

esp_flasher_app.h

@@ -4,7 +4,7 @@
 extern "C" {
 #endif
 
-#define ESP_FLASHER_APP_VERSION "v1.3"
+#define ESP_FLASHER_APP_VERSION "v1.4"
 
 typedef struct EspFlasherApp EspFlasherApp;
 

esp_flasher_app_i.h

@@ -62,6 +62,7 @@ struct EspFlasherApp {
     Submenu* submenu;
 
     EspFlasherUart* uart;
+    bool turbospeed;
 
     bool reset;
     bool boot;

esp_flasher_worker.c

@@ -227,11 +227,10 @@ static int32_t esp_flasher_flash_bin(void* context) {
         loader_port_debug_print(err_msg);
     }
 
-#if 0 // still getting packet drops with this
     // higher BR
-    if(!err) {
+    if(!err && app->turbospeed) {
         loader_port_debug_print("Increasing speed for faster flash\n");
-        err = esp_loader_change_transmission_rate(230400);
+        err = esp_loader_change_transmission_rate(921600);
         if (err != ESP_LOADER_SUCCESS) {
             char err_msg[256];
             snprintf(
@@ -241,20 +240,21 @@ static int32_t esp_flasher_flash_bin(void* context) {
                 err);
             loader_port_debug_print(err_msg);
         }
-        furi_hal_uart_set_br(FuriHalUartIdUSART1, 230400);
+        furi_hal_uart_set_br(FuriHalUartIdUSART1, 921600);
     }
-#endif
 
     if(!err) {
         loader_port_debug_print("Connected\n");
         if(!_switch_fw(app)) {
             _flash_all_files(app);
         }
         app->switch_fw = SwitchNotSet;
-#if 0
-        loader_port_debug_print("Restoring transmission rate\n");
-        furi_hal_uart_set_br(FuriHalUartIdUSART1, 115200);
-#endif
+
+        if (app->turbospeed) {
+            loader_port_debug_print("Restoring transmission rate\n");
+            furi_hal_uart_set_br(FuriHalUartIdUSART1, 115200);
+        }
+
         loader_port_debug_print(
             "Done flashing. Please reset the board manually if it doesn't auto-reset.\n");