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Could you explain why? A JTAG master seems easily bit-bangable unless you require high data rates?
by hkwerf 3y ago
Could you explain why? A JTAG master seems easily bit-bangable unless you require high data rates?
- 15155 3y agoTMS is hard to manage. High data rates are exactly the issue. Any MCU can bitbang JTAG at 100kHz. Try doing it at 30 MHz sustained.
- bogantech 3y agoIndeed my understanding is that it should not require crazy hardware requirements - it's a serial protocol clocked by the programmer. Here's an Arduino project to program CPLDS/FPGAs using XSVF files https://github.com/wschutzer/xsvfduino https://github.com/wschutzer/xsvfduino I'd say that the cheap programming cables are abundant and already compatible with the vendor tools so there's not much motivation to reinvent the wheel.