#2409 pic18f14k22 include

[egan.fryazino]

in sdcc/non-free/include/pic16/pic18f14k22.h TMR3 is 8 bit sfr, same as TMR3L
...
extern at(0x0FB2) sfr TMR3;
extern at(0x0FB2) sfr TMR3L;
...
but TMR3 is 16 bit timer/counter
may be in this header should be
extern __at(0x0FB2) volatile unsigned short int TMR3;
?

[egan.fryazino]

same problem in all other 16bit timers/counters in pic16 headers

[Molnár Károly]

The SDCC not able to deal well with the timer registers. This it is because the reading and writing of two half-register work well in a different order. Example:

read:

    movf    TMR3L, w
    movwf   value
    movf    TMR3H, w
    movwf   (value + 1)

write:

    movf    (value + 1), w
    movwf   TMR3H
    movf    value, w
    movwf   TMR3L

See: PIC18(L)F1XK22 Data Sheet page 110

Molnár Károly