I want to add a usb keyboard to my LPC1788 board. I'm using RL-USB for it. I have successfully used RL-usb to read and write a usb flash-drive. But i can not get it to work with a usb keyboard, usbh_hid_status(0, 0) always returns 0. anybody knows why?
Did you try the USB Host Keyboard example from Keil Instalaltion directory for this board ?
Yes, I have tried that. In fact, my USB flash-drive project was modified from the MSD example of the "LPC1788-32 Developers Kit", and it works! so i think the hardware of my board is OK. but when i tried the HID example, it fails. usbh_hid_status(0, 0) always return 0. i also have a LPC1768 board, it works well with both USB flash-drive and usb keyboard using RL-USB.