2 questions concerning the driver API

[Ralph Metzler <rjkm@netcologne.de>]

Uwe Rathmann writes:
 > Hi everybody,
 > 
 > 2 questions concerning the driver API:
 > 
 > 1) Forward Error Correction: struct frontend.fec
 > 
 > According EN 300 468 V1.3.1, Table 25 valid values for fec are:
 > 
 > 	1: 1/2
 > 	2: 2/3
 > 	3: 3/4
 > 	4: 5/6
 > 	5: 7/8
 > 
 > When parsing the NIT I get the correct values corresponding to the documented
 > fec's for the different transponders. But I always have to set a 2 for the
 > driver to
 > get data from the transponder. So have frontend.fec and the FEC_inner different
 > meanings ?

Yes.
frontend.fec uses the register value of the DVB decoder which has a
few more (non DVB standard) settings.

0: 1/2
1: 2/3
2: 3/4
3: 4/5
4: 5/6
5: 6/7
6: 7/8
7: 8/9 
8: auto
 
 > Is the struct frontend documented somewhere ? Most of its attributes are
 > obvious,
 > but some of them remain unclear to me.

What else is unclear?

 


Ralph