![]() ![]() Target power is selectable when the device is powered from the RPi 3.3V supply. On-board level shifters allow you to connect to targets with JTAG and SWD interfaces from 1.8V to 5V. The JTAG HAT is designed to work with OpenOCD, which supports debugging a large number of devices, such as the STM32 and ESP32. His JTAG HAT design includes properly-labeled 20-pin 0.1” and 1.27mm Cortex Debug Connectors, making the process streamlined instead of a hassle. Matt Mets of BlinkinLabs decided to cut out the headache of converting the 0.1” headers on a Raspberry Pi to the 1.27mm pins on a board. However, finding the cables to connect the RPi to your board can turn into a project in itself. ![]() This is a cheap and convenient solution for messing around with a variety of microcontrollers and embedded devices. Tools like the Black Magic probe can also work well but lack the flexibility of a Raspberry Pi with OpenOCD. Low-level debugging can be performed at home with a JTAG debugger and OpenOCD, but at-home setups often lack a JTAG debugger. Having a hardware debugging tool on hand can prove useful, especially when developing embedded products. ![]()
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