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Move timestamp detection to active edge

pull/156/head
IanSB 2020-08-14 01:40:00 +01:00
rodzic b35881da67
commit 24f01379c2
1 zmienionych plików z 2 dodań i 3 usunięć
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5
src/macros.S
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@ -330,15 +330,14 @@ wait_csync_lo_fast2\@:
tst r3, #BIT_NO_SKIP_HSYNC
tstne r8, #CSYNC_MASK
bne wait_csync_lo_fast2\@
READ_CYCLE_COUNTER r2 //store timestamp in R2 instead of stack for fast mode
eor r3, r3, #BIT_NO_SKIP_HSYNC
wait_csync_hi_fast\@:
WAIT_FOR_PSYNC_SINGLE_EDGE_FAST // wait for next edge of psync
tst r3, #BIT_NO_SKIP_HSYNC
tsteq r8, #CSYNC_MASK
beq wait_csync_hi_fast\@
eor r3, r3, #BIT_NO_SKIP_HSYNC
READ_CYCLE_COUNTER r2 //store timestamp in R2 instead of stack for fast mode
// Skip the configured number of psync edges (modes 0..6: edges every 250ns, mode 7: edges ever 333ns)
skip_psync_loop_simple_trailing_fast\@:
WAIT_FOR_PSYNC_EDGE_FAST // wait for next edge of psync
@ -368,7 +367,6 @@ wait_csync_lo_fast4\@:
tst r3, #BIT_NO_SKIP_HSYNC
tstne r8, #CSYNC_MASK
bne wait_csync_lo_fast4\@
READ_CYCLE_COUNTER r2 //store timestamp in R2 instead of stack for fast mode
eor r3, r3, #BIT_NO_SKIP_HSYNC
wait_csync_hi_fast4\@:
WAIT_FOR_PSYNC_EDGE_FAST // wait for next edge of psync
@ -376,6 +374,7 @@ wait_csync_hi_fast4\@:
tsteq r8, #CSYNC_MASK
beq wait_csync_hi_fast4\@
eor r3, r3, #BIT_NO_SKIP_HSYNC
READ_CYCLE_COUNTER r2 //store timestamp in R2 instead of stack for fast mode
// Skip the configured number of psync edges (modes 0..6: edges every 250ns, mode 7: edges ever 333ns)
skip_psync_loop_simple_trailing_fast4\@:
WAIT_FOR_PSYNC_EDGE_FAST // wait for next edge of psync