Mercurial > hg > Members > kono > nitros9-code
diff level1/modules/dwread.asm @ 2773:ce3dba57003b lwtools-port
boot_dw now uses dwinit.asm.
dwinit.asm updated for Arduino
| author | Boisy Pitre <boisy.pitre@nuance.com> |
|---|---|
| date | Wed, 23 Jan 2013 14:54:29 -0600 |
| parents | bfe3de781ddf |
| children | 28ed72477814 |
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--- a/level1/modules/dwread.asm Tue Jan 22 19:14:52 2013 -0600 +++ b/level1/modules/dwread.asm Wed Jan 23 14:54:29 2013 -0600 @@ -20,20 +20,19 @@ IFNE ARDUINO * Note: this is an optimistic routine. It presumes that the server will always be there, and * has NO timeout fallback. It is also very short and quick. -DWRead clra ; clear Carry (no framing error) +DWRead clra ; clear Carry (no framing error) pshs u,x,cc ; preserve registers leau ,x ldx #$0000 -loop@ tst $FF51 ; check for CA1 bit (1=Arduino has byte ready) - bpl loop@ ; loop if not set - ldb $FF50 ; clear CA1 bit in status register - stb ,u+ ; save off acquired byte - abx ; update checksum +loop@ tst $FF51 ; check for CA1 bit (1=Arduino has byte ready) + bpl loop@ ; loop if not set + ldb $FF50 ; clear CA1 bit in status register + stb ,u+ ; save off acquired byte + abx ; update checksum leay ,-y bne loop@ - - leay ,x ; return checksum in Y - puls cc,x,u,pc ; restore registers and return + leay ,x ; return checksum in Y + puls cc,x,u,pc ; restore registers and return ELSE