In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:

I needed a running, 8-bit random number for a program I jsut wrote so I stuck this little chunk of code (adapted from www.sxlist.com) into my ISR.  It works really well and I just copy "seed" when I need a random value. 

[code]
LFSR:						' randomize "seed"
  IF seed = 0 THEN
    seed = 24
  ENDIF
  ASM
    MOV  W, #$1D
    CLRB C
    RL   seed
    SNB  C
    XOR  seed, W
  ENDASM
[/code]

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