CRC error in all USB SOF packets
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2015-07-08 7:04 AM
Posted on July 08, 2015 at 16:04
Hi,
I'm running a stm32f427 on a custom board as Host, HS core, FS mode. When a device is attached I get an interrupt when the device is detected and the host starts sending SOF's. But the last bits in the SOF packet is at a strange voltage level. They are at 1.5 V, a half one!Look at this scope image:https://drive.google.com/open?id=0B3wMeRPstoowY3VFN0hWYk8zVllzNk1UMzA3V1hpcFdNZjk4Anyone have seen this before or can explain it? The device does not reply on requests as it detects a CRC error. #sof #stm32 #usb
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