ESP32-S2, LOG outputs to UART0 and Serial.print to USB when CDC is selected

N0ury commented 1 year ago

Board

ESP32-S2-SOLO module (not kit)

Device Description

I'm doing tests on a breadboard

Hardware Configuration

USB cable is connected to D+ and D- (and GND) The module is powered externally

Version

latest master (checkout manually)

IDE Name

PlatformIO

Operating System

macOS v11.7.5 Big Sur

Flash frequency

80MHz

PSRAM enabled

yes

Upload speed

921600

Description

I work in CLI mode under platformio. I have opened an issue at https://community.platformio.org/ and someone pointed me to

https://github.com/espressif/arduino-esp32/issues/6245#issuecomment-1031540725 and
https://github.com/espressif/arduino-esp32/issues/7407 I'm not sur it's the same for me.

I have tried under Arduino IDE and it's the same. That's why I open this issue here.

With a S2-SOLO (chip ESP32-S2R2) I can flash an app using native USB. I can also print with Serial.print via native USB.

My problem is that when I use log_x (same as esp-idf ESP_LOGx), the output goes to the UART not USB. ``

Sketch

The app is simply a Serial.println and a log_x.

Platformio.ini:
[env]
platform = espressif32
board = esp32-s2-saola-1
framework = arduino
monitor_speed = 115200
upload_speed = 921600
board_upload.use_1200bps_touch = true
board_upload.wait_for_upload_port = true
build_flags =
     -DCORE_DEBUG_LEVEL=3
     -DARDUINO_USB_CDC_ON_BOOT=1
     -DBOARD_HAS_PSRAM
     -mfix-esp32-psram-cache-issue

[env:esp-solo]
    build_src_filter = +<main.cpp>
# For debug
platform_packages = platformio/tool-openocd-esp32
debug_tool = esp-prog
debug_init_break = 
  set remote hardware-watchpoint-limit 2
  break base.cpp:16
debug_extra_cmds = break main.cpp:26

# For testing FRAM
[env:fram]
    build_src_filter = +<fram.cpp>

Debug Message

No errors, no warnings

Other Steps to Reproduce

No response

I have checked existing issues, online documentation and the Troubleshooting Guide

[X] I confirm I have checked existing issues, online documentation and Troubleshooting guide.

mrengineer7777 commented 1 year ago

@SuGlider @igrr can you help?

SuGlider commented 1 year ago

I can investigate it.

SuGlider commented 1 year ago

@N0ury - I got it to work:

void setup() {
  // Serial is the TinyUSB interface | USBCDC class | -DARDUINO_USB_CDC_ON_BOOT=1

  Serial.begin(115200);
  Serial.setDebugOutput(true);
  delay(500);

  Serial.println("\n=========\nTesting...\n=========\n");
  log_e("TESTING...");
}

void loop() {
  log_e("TESTING LOOP...");
  Serial.println("Loop...");
  delay(1000);
}

SuGlider commented 1 year ago

Serial.setDebugOutput(true); activates the LOG output to the Serial object, which in this case is attached to the USB CDC port.

@N0ury - Let me know if this works for you.

N0ury commented 1 year ago

@SuGlider I've tried it and it works fine now. The issue can be closed. Perhaps this point should be highlighted in the documentation

espressif / arduino-esp32