View source for EBC Exercise 30 PRU porting pasm to clpru

[[Category:ECE497]]
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[http://processors.wiki.ti.com/index.php/PRU_Assembly_Instructions#pasm_vs._clpru http://processors.wiki.ti.com/index.php/PRU_Assembly_Instructions#pasm_vs._clpru] has better notes that I have here.

Here are some notes on things to watch for when converting from ''pasm'' assembly to ''clpru''.  Much of this came from
http://www.ti.com/lit/ug/spruhv6a/spruhv6a.pdf

{| class="wikitable"
|-
!  !! pasm !! clpru !! Notes
|-
| Comments || \\ || ; || Start comments with ;
|-
| Loading constants || MOV r0, 0x0000 || LDI r0, 0x0000 || pasm generalized MOV to not only move registers (MOV r0, r1), but also
moving immediate values (MOV r0, 0x0).  The MOV in clpru is only for moving registers.
|-
| Loading 32-bit constants || MOV r0, 0xffffffff || LDI32 r0, 0xffffffff || If you are loading more than 16 bits, use LDI32.
|-
| load/store byte burst || LBBO r2, r1, 0, 4 || LBBO &r2, r1, 0, 4 || An '''&''' is needed before the first register of LBBO, SBBO, LBCO or SBCO.
|-
| Substitution Symbols || #define CH1BIT r30.t8 ||     .asg r30.t8, CH1BIT || Be sure the '''.''' isn't in the first column.
|}

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