problem with full-speed USB device
tomtobback opened this issue · 4 comments
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.
I second that. Full-speed gamepads seem to work incorrectly, but the low-speed ones are great with the firmware.
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.
Are there any recent forks that use Keil C51?
Are there any recent forks that use Keil C51?
It seems no.