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Sarayan | zipCPU: the cycloneV ddr handling is a combination of a HMC (hard memory controller), some delay lines, dynamic termination control, pll and who knows what else. Plus code on a cpu (either hps or nios2) to calibrate the stuff. I suspect the general principles are fpga-independant, and the code half-independant too | 09:48 |
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ZipCPU | The problem is that the "hard memory controller" is not fpga-independent. Every FPGA has their own implementation of it. That makes it hard to port something from one device to another. | 13:34 |
ZipCPU | Worse, many FPGAs don't document the hard part of their memory controller. | 13:53 |
Sarayan | sure, but otoh half the calibration code is probably fpga-independant | 14:26 |
Sarayan | and what is needed/the concepts are similarly transverse | 14:27 |
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