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Just to be sure I understand it correctly, is your idea to use the SPI port to transfer the TDI data via the MOSI line? Could you explain your idea a little bit more? Especially the benefits of using the SPI port, it would be really interesting for me. Also whether I could take advantage of the...

I don't think I'll need 12Mbit/sec over the USB bus, even the commercial adapters like J-Link don't achieve more than 600-800kb/s over the USB bus (by the datasheet). Only the JTAG clock runs at 12MHz and flushes the buffer (about 2kB) with 12Mbit/s. Also most of the processors don't even have...

Hi, sure I could get a J-Link, even at a reasonable price as a student but it's more like a learning project to get some experience with ARM, USB and JTAG :) The complexity isn't that huge in fact... I spent quite some time researching various JTag adapters, most of them do nothing more than...

Hi, I just received my Teensy3.1 (nice work!), and my goal is to create a JTAG Adapter for programming/debugging other chips. The plan is to provide an USB interface to the Teensy3.1 and writing a driver with libusb for the urJTAG utility (maybe OpenOCD in the future). The JTAG uses a TCK...