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| pftbest | Hello. I'm trying to get liteeth running on my versal board. I started with liteeth/phy/usrgmii.py but it turns out versal doesn't have IDELAYE3, only IDELAYE5. | 12:03 |
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| pftbest | As I understand I will need to dynamically load the delay into i_CNTVALUEIN instead of specifying it as a constant, but also the delay itself probably needs to be calculated differently | 12:04 |
| pftbest | Does anyone has experience with IDELAYE5? | 12:05 |
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| pftbest | Ok, figured it out. Turns out a single instance of IDELAYE5 can only do 1.8ns of delay. So to get 2.0ns you need to cascade a pair of IDELAYE5 + ODELAYE5 to get up to 3.6ns | 20:18 |
| pftbest | Also, you don't really need to do dynamic loading, it seems to work fine even if you tie off i_LOAD=1 and put your constant in i_CNTVALUEIN, not sure if it's ok to do this, but works for me | 20:21 |
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