usb_serial_jtag: fix the bug that cannot write with usb_jtag

components/bootloader_support/src/bootloader_console.c

@@ -27,6 +27,7 @@
 #include "esp32s2/rom/usb/usb_common.h"
 #elif CONFIG_IDF_TARGET_ESP32C3
 #include "esp32c3/rom/ets_sys.h"
+#include "esp32c3/rom/uart.h"
 #endif
 #include "esp_rom_gpio.h"
 #include "esp_rom_uart.h"
@@ -115,7 +116,7 @@ void bootloader_console_init(void)
 #ifdef CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG
 void bootloader_console_init(void)
 {
-    //Nothing to do; ROM already outputs here by default.
-    //(But also to the UART; should we disable that? hmm.)
+    UartDevice *uart = GetUartDevice();
+    uart->buff_uart_no = ESP_ROM_USB_SERIAL_DEVICE_NUM;
 }
 #endif //CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG

components/esp_rom/esp32c3/esp_rom_caps.h

@@ -18,3 +18,4 @@
 #define ESP_ROM_HAS_CRC_BE       (1) // ROM CRC library supports Big Endian
 #define ESP_ROM_HAS_JPEG_DECODE  (1) // ROM has JPEG decode library
 #define ESP_ROM_UART_CLK_IS_XTAL (1) // UART clock source is selected to XTAL in ROM
+#define ESP_ROM_USB_SERIAL_DEVICE_NUM (3) // UART uses USB_SERIAL_JTAG port in ROM.