SEEED XIAO RP2040 uploads, but does not run

[markcohen]

I have several SEEED rp2040 boards, and have tried to run and compile simple code, such as Blink.ino

I know that this sounds like a newbie question, but I am very familiar with Arduino with other boards. I am stuck on the RP2040.

The board and port are recognized properly. When I press the upload button in verbose mode, I receive the following output, which does not indicate any errors:

========

Sketch uses 58848 bytes (2%) of program storage space. Maximum is 2093056 bytes.
Global variables use 9640 bytes (3%) of dynamic memory, leaving 252504 bytes for local variables. Maximum is 262144 bytes.
"/Users/mscohen/Library/Arduino15/packages/rp2040/tools/pqt-python3/1.0.1-base-3a57aed-1/python3" -I "/Users/mscohen/Library/Arduino15/packages/rp2040/hardware/rp2040/4.7.1/tools/uf2conv.py" --serial "/dev/cu.usbmodem1101" --family RP2040 --deploy "/Users/mscohen/Library/Caches/arduino/sketches/096FF690349861577FA559168E3166DD/Blink.ino.uf2"
Resetting /dev/cu.usbmodem1101
Converting to uf2, output size: 151040, start address: 0x2000
Scanning for RP2040 devices
Flashing /Volumes/RPI-RP2 (RPI-RP2)
Wrote 151040 bytes to /Volumes/RPI-RP2/NEW.UF2

======

However the program does not run at all. I have tried this on 3 XIAO boards. I have the same problem with other skeleton programs. For example:

=========

void setup() {

Serial.begin(115200);

delay(2000);

}

void loop() {

Serial.println("Hello");

delay(1000);

}

=========

I am running Arduino IDE 2.3.5 on a Mac. I have installed version 4.7.1 of the “Raspberry Pi Pico/RP2040/RP2350” board manager, and the “https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json” into the settings. As I noted the board appears on my ports.

For what it’s worth, the same code runs properly on the SAMD21 QTPY boards.

I will be very grateful for any help

[UKHeliBob]

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[kmin]

You followed all the steps from seed wiki?

Arduino | Seeed Studio Wiki

[markcohen]

Yes. As best I could, but they were not complicated.

[6v6gt]

How did you interpret this (from link in post #3) ?

Does it require an external USB/UART adaptor ?
Anyway, try first to start with the example to blink a led. If that works then proceed with the sketch to write to the serial monitor.

[ptillisch]

I interpret it as one of the many errors you will find in the Seeed Studio documentation.

I just tried it on my XIAO RP2040 and the sketch outputs to the USB CDC serial port of the board as expected.