todo

此程序为GPS接收机的源码

TODO file for GPL-GPS

1. Check the stack usage on the idle thread - can we reduce it to the minimum
1200 bytes? The 1200 bytes is defined as the minimal stack size for us -- sorry
I forgot where. Also maybe we should change that since we clearly have threads
that take less than 512 bytes (see the 'd' option in the display).
(Isn't stack usage defined in gpl-gps.c ?)

2. Check the tm_basic code to find out how to measure the interrupt stack usage.

3. In the config tool, under Math Library -> Compatibility Mode, maybe we can
use IEEE - only? But need to be careful if we ever need POSIX support.

4. Move floating point variables in position.c to statics, so that we can
reduce the stack down to a normal thread size. Seems like it's be more
efficient, in terms of not having to have a huge stack (and being more
deterministic about stack stuff). (Check efficiency too.)

5. Take the long term average of the clock correction, and add it to the clock
every TIC if we're not positioning. (If we're not positioning?)

6. In position.c, change to a structure indexed ONLY by channel. Probably means
having another array to index the valid channels? Or?

7. Implement a "wider" aquisition algorithm, possibly DFT based.

8. Modularize the algorithms to allow subsitution of various forms.

9. Change the navigation bit extraction in tracking.c to be noise-tolerant. It is desirable to be able to choose either the present extraction or the proposed one, see Modularization above.

10. Implement (re-implement?) carrier phase aiding

11. Implement a Kalman filter

12. Dynamic loading of code?

13. A command interpreter?

14. Provide an option for fixed point computations

15. High-bandwitdh communications with the host for debugging or off-loading
    some of the computation.

16. Achieve some host independence, so that algorithms can run on a PC for
    example.