ip wrote:
> How to use the remote control from my TV with LV to control my
> application?
From Irda Association:
IrDA was designed for cheap, bidirectional, short range, fairly
directional point to point connections. Initially up to 115.2kbps via
additions to an RS232C serial port, and latter up to 4 Mbps. They use
baseband return to zero inverted modulation. The 4 Mbps scheme uses a 4
pulse position modulation scheme of two bits per pulse.
Remote controls for TVs and similar are totally different. They use
approximately 40 kHz signals and pulse width modulation, with a variety
of protocols. They are customised for low speed, wide angle, one way,
long range connections. These are not IrDA compliant. You can find one
piece receiver transmit
ter packages for remote signals at low cost, and
drive these from TTL. IrDA can't normally do TV remote control signals,
and are shorter range, but you can often fake the signals in software.
Infrared connections for keyboards and the like do not have to follow
any standard, as the manufacturer supplies both ends of the connection.
bye
--
Francesco Pezzuti ICQ: 14253763
