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DreamSourceLab / DSView

An open source multi-function instrument for everyone
www.dreamsourcelab.com
GNU General Public License v3.0
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QSPI decider seems wrong #502

Open panpgg opened 2 years ago

panpgg commented 2 years ago

Hi , I have used DSView to decode QSPI waveform but it's seems wrong. Flash is MX25R6435F, my seeting are CLK : 0 IO0 : 1 IO1 : 2 IO2 : 3 IO3 : 4 CS : 5 (active low) CPOL = CPHA = 0

I make sure I send 0x5A but I can't see 0x5A in waveform decode. Is there anything I missed ?

Best Regards, DSLogic-la-220609-092658.zip

DreamSourceLab commented 2 years ago

@panpgg What is the clock frequency of QSPI? The sample rate is too low, so the real signal is not sampled correctly. We recommend a sample rate of 10 times than under test singals, at least 4 times.

panpgg commented 2 years ago

@DreamSourceLab The clock frequency of QSPI is 2MHz. I think it's enough but I am going to increase sample rate and test again. Are there other settings or HW issues to caused this issue ?

DreamSourceLab commented 2 years ago

@panpgg But in your dsl file, the frequency is not 2MHz. There are many pulse up to 12.5MHz.