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Diffstat (limited to 'Lab 2.X/Lab2A.s')
-rw-r--r-- | Lab 2.X/Lab2A.s | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/Lab 2.X/Lab2A.s b/Lab 2.X/Lab2A.s new file mode 100644 index 0000000..4f7e189 --- /dev/null +++ b/Lab 2.X/Lab2A.s @@ -0,0 +1,74 @@ + +.include "xc.inc" ; required "boiler-plate" (BP) + +;the next two lines set up the actual chip for operation - required +config __CONFIG2, POSCMOD_EC & I2C1SEL_SEC & IOL1WAY_OFF & OSCIOFNC_ON & FCKSM_CSECME & FNOSC_FRCPLL & SOSCSEL_LPSOSC & WUTSEL_FST & IESO_OFF +config __CONFIG1, WDTPS_PS1 & FWPSA_PR32 & WINDIS_OFF & FWDTEN_OFF & BKBUG_ON & GWRP_ON & GCP_ON & JTAGEN_OFF + + .bss ; put the following labels in RAM +counter: + .space 2 ; a variable that takes two bytes (we won?t use + ; it for now, but put here to make this a generic + ; template to be used later). +stack: + .space 32 ; this will be our stack area, needed for func calls + +.text ; BP (put the following data in ROM(program memory)) + +;because we are using the C compiler to assemble our code, we need a "_main" label +;somewhere. (There's a link step that looks for it.) +.global _main ;BP +;your functions go here + +_main: + + bclr CLKDIV,#8 ;BP + nop + ;; --- Begin your main program below here --- + + + mov #0x9fff,w0 + mov w0,AD1PCFG ; Set all pins to digital mode + mov #0b1111111111111110,w0 + mov w0,TRISA ; set pin RA0 to output + mov #0x0001,w0 + mov w0,LATA ; set pin RA0 high + call foreverLoop + +wait_24cycles: + ; 2 cycles for function call + repeat #17 ; 1 cycle to load and prep + nop ; 17+1 cycles to execute NOP 18 times + return ; 3 cycles for the return + +wait_32cycles: ; 2 + repeat #24 ; 1 + nop ; 25+1 cycles = 26 + return ; 3 + +delay_100us: + repeat #1593 + nop + return + +delay_1ms: + repeat #15993 + nop + return + +foreverLoop: + + call wait_24cycles ; 24 cycles + clr LATA ; set pin RA0 low = 1 cycle + call wait_32cycles ; 32 cycles + inc LATA ; set pin RA0 high = 1 cycle + bra foreverLoop + +; nop +; nop +; clr LATA +; repeat #4 +; nop +; inc LATA +; bra foreverLoop +.end |