fix(esp32-c5): Use a longer reset delay with usb-serial/jtag to stabilize boot-up

Author: mythbuster5

esptool/reset.py

@@ -148,13 +148,13 @@ class HardReset(ResetStrategy):
     Can be used to reset out of the bootloader or to restart a running app.
     """
 
-    def __init__(self, port, uses_usb_otg=False):
+    def __init__(self, port, uses_usb=False):
         super().__init__(port)
-        self.uses_usb_otg = uses_usb_otg
+        self.uses_usb = uses_usb
 
     def reset(self):
         self._setRTS(True)  # EN->LOW
-        if self.uses_usb_otg:
+        if self.uses_usb:
             # Give the chip some time to come out of reset,
             # to be able to handle further DTR/RTS transitions
             time.sleep(0.2)

esptool/targets/esp32c5.py

@@ -7,6 +7,7 @@
 
 from .esp32c6 import ESP32C6ROM
 from ..loader import ESPLoader
+from ..reset import HardReset
 
 
 class ESP32C5ROM(ESP32C6ROM):
@@ -24,6 +25,8 @@ class ESP32C5ROM(ESP32C6ROM):
     PCR_SYSCLK_XTAL_FREQ_V = 0x7F << 24
     PCR_SYSCLK_XTAL_FREQ_S = 24
 
+    UARTDEV_BUF_NO = 0x4085F51C  # Variable in ROM .bss which indicates the port in use
+
     # Magic value for ESP32C5
     CHIP_DETECT_MAGIC_VALUE = [0x8082C5DC]
 
@@ -67,6 +70,10 @@ def get_crystal_freq_rom_expect(self):
             self.read_reg(self.PCR_SYSCLK_CONF_REG) & self.PCR_SYSCLK_XTAL_FREQ_V
         ) >> self.PCR_SYSCLK_XTAL_FREQ_S
 
+    def hard_reset(self):
+        print("Hard resetting via RTS pin...")
+        HardReset(self._port, self.uses_usb_jtag_serial())()
+
     def change_baud(self, baud):
         if not self.IS_STUB:
             crystal_freq_rom_expect = self.get_crystal_freq_rom_expect()