I have a couple of these "RTLDUINO_PRO_V1.0" boards which contain a DAP programmer and an RTL-00 module:
https://www.digikey.com/product-detail/ ... ND/7033233
When I plug the USB cable into the top-left (DAP) USB connector, the device shows up as a 2MB USB HDD as expected. But no matter what I do, it disconnects after a few seconds, then reconnects, then disconnects, and finally fails with Device Manager showing an "Unknown USB Device (Device Descriptor Request Failed"
I have the mbed driver installed.
The weird thing is if I'm very quick, during those first few seconds where it shows up as a USB HDD, I *can* connect to it with OpenOCD... but I lose the connection within seconds.
I also tried plugging my USB cable directly into the RTL-00 module. Connecting to that serial port, at 38400 baud, and pressing the RST button on the module, I get this error:
ROM Version: 0.3
Build ToolChain Version: gcc version 4.8.3 (Realtek ASDK-4.8.3p1 Build 2003)
Check boot type form eFuse
Image1 length: 0x0, Image Addr: 0x0
Image1 Validation Incorrect !!!
Please Re-boot and try again, or re-burn the flash image
So I'm guessing the RTL-00 was not factory programmed? But that should not cause the DAP programmer to disconnect as well, right?
Any help is appreciated.
Discuss about compilers and toolchains for the RTL8710 WiFi chip
2 posts • Page 1 of 1
I was suffering the same issue. At least in my case, this was due to an older firmware revision on my CMSIS-DAP and updating to the latest fixed it. The Ameba IoT project have released a number of newer versions which improve functional stability. Instructions and Downloads behind the registration wall at https://www.amebaiot.com .
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