SDK includes many peripheral applications (source codes). You can find some quadrature decoder applications in SDK ...motorola\embeddedSDK\DSP56F805\scr\application directory. Charlie --- cmafatcontroller <> wrote: > I am struggling with SDK's interface for working > with decoders (we > always call them 'encoders' in out part of the world > ???). The > relevant section in the SDK Targetting manual seems > quite confusing, > and there are no relevant examples that I can find > ,where the encoder > interface is being used, as opposed to being linked > through to a > Timer. > > I am assuming I have to do the following:- > > 1. Declare a structure of type decoder_sSTate for > receiving data from > the decoder interface. > 2. Open the interface e.g. > decFD=open(BSP_DEVICE_NAME_DECODER...) > 3. ioctl(? ... Not sure here... > > There are ioctl commands for reading position, pos > change, and > revolutions, however the data return format is > inconsistent between > the 3. There is also a command to read the hold data > register. What I > don't understand is that the hold data will only > contain data > transferred from the last read of the position, > revolution, and > difference counters. Also, I don't know which switch > matrix mode to > specify - presumably it doesn't matter as I am not > using the (en) > decoder with the associated timer ? > > Can somebody provide example code ? > > Thanks, > > Ian Duncan > __________________________________ |