Data Acquisition Web

The framer and the driver are actually two separate functions, but have enough in common that they are typically grouped together (and commonly referred to simply as “framer”). The driver portion refers to the software that acts as a device driver for the system’s transceiver controller. This driver initializes the infrared hardware, changes transmission speeds, delivers data to the transceiver, and receives data from the transceiver.

The framer portion refers to the bundling of a data packet into a form that can be given to the hardware. This may include the calculation of cyclic redundancy check value, the addition of start and stop bits, and transparency for reserved bytes. Because the framing approach varies with the transmission speeds, it is most common for the framer and driver functions to be combined. In this way, all hardware dependencies in a system can be localized to one section of the IrDA stack.