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by TD-Linux
4077 days ago
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>(I actually don't know so feel free to correct me). Okay, I will :) Many FPGAs load their program from a SPI chip on board, which can't be reprogrammed. However, it's increasingly common for another microcontroller or SoC to be on the same board. In this case, it's cheaper and more convenient to store the FPGA bitstream on that controller's flash and send it over SPI to the FPGA on powerup, which makes upgrades much easier, too. On the Xilinx Zynq, a FPGA containing two Cortex-A9 cores running Linux, you can simply cat your bitstream to a character device to reconfigure the FPGA. |
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