Kurenai_ryu
Advanced Member level 2
usb keyboard circuit
Sorry for my Bad English... I hope this is the right place in the forum to ask...
I'm working in a project involving numeric input. (like a calculator), I was able to made it with and 4x4 matrix keypad and lcd. and then I needed to input text... I used a PS/2 Keyboard... All got nice... but sometimes I need fewer keys so using a small ps/2 numeric keypad instead thy'old matrix keypad come to my mind! (truly It's and idea from my mentor...) Soooo.. when I need only numeric keys, I should connect the PS/2 numeric keypad... And when I need to input text I would change the keypad for a complete PS/2 keyboard ...
All of this would be nice, ONLY If I could get that d*mn PS/2 numeric keypad!!!! I can only get USB numeric keypads in this place on earth!! (Those are for laptops and so...) And making and USB host just for a keypad...
buuuuuut a friend told me that exist a small USB to PS/2 converter (just connector, no circuit.) I have seen USB mouses with this connector, and my friend told me that it works also with keyboards... (also wikipedia say something about this...)
so. The question is. Can I use this small USB to PS2 converter to get the usb keypad work with a microcontroller (which will have PS/2 firmware)??? have someone tried this???
In the middle of nowhere (where I live) I can't get a normal Ps/2 numeric keypad... please don't suggest me to get one... My budget can't affort get one from outside... I want to know if a USB numeric keypad could be useful...
Also, (just that I'm here asking a maybe-so-dumb-question) Can I use the same USB to PS/2 converter to work with an USB barcode reader??? (Mmmm maybe someone will get the idea...) as there-are ps/2 barcode readers, does the USB barcode readers emulate a USB HID keyboard?? or it's just another HID device?
The fact that implementing a USB host just for these applications.... mmmm I dont' like that... got bored just thinking that...
By th way, I'm plannig to use a PIC18 for this project...
And sorry for this long question... I'm just so nervous And don't know what to do...
Sorry for my Bad English... I hope this is the right place in the forum to ask...
I'm working in a project involving numeric input. (like a calculator), I was able to made it with and 4x4 matrix keypad and lcd. and then I needed to input text... I used a PS/2 Keyboard... All got nice... but sometimes I need fewer keys so using a small ps/2 numeric keypad instead thy'old matrix keypad come to my mind! (truly It's and idea from my mentor...) Soooo.. when I need only numeric keys, I should connect the PS/2 numeric keypad... And when I need to input text I would change the keypad for a complete PS/2 keyboard ...
All of this would be nice, ONLY If I could get that d*mn PS/2 numeric keypad!!!! I can only get USB numeric keypads in this place on earth!! (Those are for laptops and so...) And making and USB host just for a keypad...
buuuuuut a friend told me that exist a small USB to PS/2 converter (just connector, no circuit.) I have seen USB mouses with this connector, and my friend told me that it works also with keyboards... (also wikipedia say something about this...)
so. The question is. Can I use this small USB to PS2 converter to get the usb keypad work with a microcontroller (which will have PS/2 firmware)??? have someone tried this???
In the middle of nowhere (where I live) I can't get a normal Ps/2 numeric keypad... please don't suggest me to get one... My budget can't affort get one from outside... I want to know if a USB numeric keypad could be useful...
Also, (just that I'm here asking a maybe-so-dumb-question) Can I use the same USB to PS/2 converter to work with an USB barcode reader??? (Mmmm maybe someone will get the idea...) as there-are ps/2 barcode readers, does the USB barcode readers emulate a USB HID keyboard?? or it's just another HID device?
The fact that implementing a USB host just for these applications.... mmmm I dont' like that... got bored just thinking that...
By th way, I'm plannig to use a PIC18 for this project...
And sorry for this long question... I'm just so nervous And don't know what to do...