kiong86
Newbie level 3
pic usb keyboard
hi:
i have faced a problem of my project. currently, i'm doing a connection of usb keyboard to a serial in, parallel out shift register(mm74hc595). but i can't get any signal output even from the male usb port(i have tested just from keyboard usb port to the male usb port only) which is connecting to keyboard. there are 4 pins implement in the usb ports, they are 5V pin, D+, D- and Gnd pin(if i'm not mistaken). is there any command which i have missed in the middle? or any command have to transmit from microcontroller to keyboard in order to active the keyboard?
thanks in advance..
hi:
i have faced a problem of my project. currently, i'm doing a connection of usb keyboard to a serial in, parallel out shift register(mm74hc595). but i can't get any signal output even from the male usb port(i have tested just from keyboard usb port to the male usb port only) which is connecting to keyboard. there are 4 pins implement in the usb ports, they are 5V pin, D+, D- and Gnd pin(if i'm not mistaken). is there any command which i have missed in the middle? or any command have to transmit from microcontroller to keyboard in order to active the keyboard?
thanks in advance..