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Diffstat (limited to 'Lab2B.X/lab2b_asm.s')
| -rw-r--r-- | Lab2B.X/lab2b_asm.s | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/Lab2B.X/lab2b_asm.s b/Lab2B.X/lab2b_asm.s new file mode 100644 index 0000000..2dfc361 --- /dev/null +++ b/Lab2B.X/lab2b_asm.s @@ -0,0 +1,40 @@ +.include "xc.inc" + +.text ;BP (put the following data in ROM(program memory)) + +; This is a library, thus it can *not* contain a _main function: the C file will +; define main(). However, we +; we will need a .global statement to make available ASM functions to C code. +; All functions utilized outside of this file will need to have a leading +; underscore (_) and be included in a comment delimited list below. +.global _write_0, _write_1, _wait_100us, _wait_1ms + +_wait_100us: + repeat #1593 + nop + return + +_wait_1ms: + repeat #15993 + nop + return + +_write_0: ;2 cycles for function call + inc LATA ;1 + repeat #2 ;1 for load + nop ;2+1=3 nop + clr LATA ;1 + repeat #6 ;1 for load + nop ;1+6=7 nop + return ;3 return + + +_write_1: ;2 cycle call + inc LATA ;1 + repeat #8 ;1 load + nop ;1+9=10 nop + clr LATA ;1 + nop ;1 + nop ;1 + return ;3 return +
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