Post by thread:Auto-reset magic?

Hello piclisters! I have a problem. I have a jump to 0000h automagically when reaching value 0x0c of FSR (where is cleared which shouldn't happen). (FSR increases by one each loop in previous parts of the code) movf FSR,W ;off-set now in W call table ;table linear read; off-set stored in W movwf PORTA ;W now holds fetched table value ;which is put on porta bcf INTCON,INTF ;just makin'sure everything's chilli willy! bsf INTCON,GIE sleep nop table addwf PCL,F nop ;nop added because I need ;first retlw in table when FSR ;equals 0x01 retlw 0x01 retlw 0x00 retlw 0x01 retlw 0x01 retlw 0x00 retlw 0x00 retlw 0x00 retlw 0x00 retlw 0x01 retlw 0x00 ;I need only bit 0 of each of this bytes [some more rets] ;on port RA0 (linear read). nop ;But a one byte per bit basis is not sleep ;a compact code. Any ideas to save space ? nop As it is a simple linear read I must recall (no matter which section of the code I'm in) the exact bit position that was last read when leaving the table. Concerning the reset I have tried a general register instead of FSR and happen when reg. value equals 0x0c (the same as before) and in the same part of the code (that is when table off-set is 0x0c and is added to PCL) , right before I get the retlw. Now 0c plus 3f (initial table position) equals 4B (which is a valid location in the table) Thanks. P.D.: In this code the stack is flooded all the time. I don't need any return address. Is this problematic? I also use RB0 as INT to input a clock signal which synchronizes the PIC with host device (it must read RA0 output). On falling edge of clock signal PIC is interrupted, reads table, put value on RA0 and SLEEP until next falling edge (when it wakes up to do the loop again). External clock signal on RB0/INT is between 4 and 6 Mhz. Will this do? Let me know if I wasn't clear enough! -------------------------------------------- "I must not fear. Fear is the mind-killer. Fear is the little death that brings total obliteration. I will face my fear... I will permit it to pass over me and through me." Kwisatz Haderach - Dune netQ <spam_OUTnetquakeTakeThisOuTinnocent.com>