In this blog post, I’ll describe 2 techniques: How can you quickly update bitstreams with new RAM content without going through resynthesis and place-and-route? It by compile-firmware and update-bitstream, you can save minutes in iteration timeįor tiny designs, or hours for large ones. You can avoid the process of synthesis and place-and-route, and replace Using tiny CPUs instead of hardware also allows for rapid iteration: if Store firmware: the amount of C code that I usually need is just not In those cases,Īll the firmware is pre-baked in block RAMs. In my personal projects, I often use tiny CPUs to implement controllers forĪll kinds of low speed protocols like I2C, SPI, Ethernet PHY MDIO etc. The easiest way to have boot code present immediately after powering up. This is an essential feature when the FPGA has a soft-core CPU, because it’s Most FPGAs also allow block RAMs to be given a non-zero content during Get the content that defines their behavior, switches on interconnect networks create theĭesired routing topology, flip-flops are connected to the right clock network, etc. The logic elements of FPGAs are configured with a bitstream: lookup tables of logic elements Fast Bitstream Update for the Generic Verilog Case.Fast Bitstream Update after Changing a MIF File.Manual Instantiation of Intel Block RAMs.The Generic Way to Infer Initialized RAMs.
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