fix: pass error message to exception in OTG mode

Closes espressif#996
Closes espressif#997

Author: peterdragun

esptool/targets/esp32s2.py

@@ -296,15 +296,12 @@ def _check_if_can_reset(self):
             strap_reg & self.GPIO_STRAP_SPI_BOOT_MASK == 0
             and force_dl_reg & self.RTC_CNTL_FORCE_DOWNLOAD_BOOT_MASK == 0
         ):
-            print(
-                "WARNING: {} chip was placed into download mode using GPIO0.\n"
-                "esptool.py can not exit the download mode over USB. "
-                "To run the app, reset the chip manually.\n"
-                "To suppress this note, set --after option to 'no_reset'.".format(
-                    self.get_chip_description()
-                )
+            raise SystemExit(
+                f"Error: {self.get_chip_description()} chip was placed into download "
+                "mode using GPIO0.\nesptool.py can not exit the download mode over "
+                "USB. To run the app, reset the chip manually.\n"
+                "To suppress this note, set --after option to 'no_reset'."
             )
-            raise SystemExit(1)
 
     def hard_reset(self):
         uses_usb_otg = self.uses_usb_otg()

esptool/targets/esp32s3.py

@@ -358,15 +358,12 @@ def _check_if_can_reset(self):
             strap_reg & self.GPIO_STRAP_SPI_BOOT_MASK == 0
             and force_dl_reg & self.RTC_CNTL_FORCE_DOWNLOAD_BOOT_MASK == 0
         ):
-            print(
-                "WARNING: {} chip was placed into download mode using GPIO0.\n"
-                "esptool.py can not exit the download mode over USB. "
-                "To run the app, reset the chip manually.\n"
-                "To suppress this note, set --after option to 'no_reset'.".format(
-                    self.get_chip_description()
-                )
+            raise SystemExit(
+                f"Error: {self.get_chip_description()} chip was placed into download "
+                "mode using GPIO0.\nesptool.py can not exit the download mode over "
+                "USB. To run the app, reset the chip manually.\n"
+                "To suppress this note, set --after option to 'no_reset'."
             )
-            raise SystemExit(1)
 
     def hard_reset(self):
         uses_usb_otg = self.uses_usb_otg()