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Re: [libusb] less data length in async bulk transfer with 2 cameras
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From: Tim R. <ti...@pr...> - 2018-11-02 18:00:28
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Tim Roberts wrote: > On Nov 1, 2018, at 9:06 PM, zheng rong <zhe...@gm... > <mailto:zhe...@gm...>> wrote: >> >> > How did you fix the problem finally? >> >> Third -- the real solution -- was to spin the camera board to add >> a 32k >> external FIFO chip. >> >> >> Would you please provide the part name of the external FIFO chip? > > I'll see if I can find that out. It was 10 years ago... Amazingly, I found the schematic. It was a Cypress CY7C4251, which is only an 8k FIFO. I though they added 32k, but I remembered incorrectly. I assume they're no longer available; chips don't have a long life these days. It is an 8Kx9 unit; we passed the 8 data bits plus PKTEND. -- Tim Roberts, ti...@pr... Providenza & Boekelheide, Inc. |
