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atc1441 / CH559sdccUSBHost

USB host to Arduino Interface with the Cheap CH559 uC
GNU General Public License v3.0
229 stars 54 forks source link

problem with full-speed USB device #17

Open tomtobback opened 3 years ago

tomtobback commented 3 years ago

Hi, thanks a lot for sharing this project. it works well with low-speed USB devices (1.5Mbps), i have tested with a mouse and keyboard, but when i connect a high-speed USB device (12Mbps) like a barcode scanner, the firmware does not seem to deal with it correctly. in my case, the scanner, recognised as a keyboard, sends each char in the barcode as a single keystroke, and only the first few chars are correct, then some are incorrect, and some discarded; the results vary. i see in the firmware that the 2 ports are configured for full-speed but maybe there is a buffer or timing issue that causes this problem. any advice greatly appreciated.

DFL1973 commented 1 year ago

I second that. Full-speed gamepads seem to work incorrectly, but the low-speed ones are great with the firmware.

JoeHo8051 commented 1 week ago

This could be caused by the DMA marco address setting. The original keil C compiler is little end style, and the author didn't change it to fit the sdcc compiler.

GrantMTG commented 1 week ago

Are there any recent forks that use Keil C51?

JoeHo8051 commented 5 days ago

Are there any recent forks that use Keil C51?

It seems no.