Leahnaya/gba-link-connection
1
0
Fork 0
mirror of https://github.com/afska/gba-link-connection.git synced 2026-09-07 08:26:40 -05:00
Code Issues Actions Packages Projects Releases Wiki Activity

FIX: Making IR demodulation more reliable using DEMODULATION_HYSTERESIS_DELAY

Browse Source
This commit is contained in:
Rodrigo Alfonso
2025-02-11 20:58:51 -03:00
parent 1becbcfbb8
commit c4d9c4a2c5
2 changed files with 27 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
lib/iwram_code/LinkIR.cpp
View File

@@ -33,6 +33,9 @@ LINK_CODE_IWRAM bool LinkIR::receive(u16 pulses[],
u32 pulseIndex = 0;
u32 lastTransitionTime = 0;
bool candidateTransitionActive = false;
u32 candidateTransitionStart = 0;
firstLightTime = 0;
lastLightTime = 0;
transitionCount = 0;
@@ -62,18 +65,29 @@ LINK_CODE_IWRAM bool LinkIR::receive(u16 pulses[],
hasStarted = true;
}
if (hasStarted && isMark &&
timeSinceLastLight >=
DEMODULATION_SPACE_THRESHOLD * CYCLES_PER_MICROSECOND) {
// mark -> space
u32 pulseDuration =
(currentLastLightTime - lastTransitionTime) / CYCLES_PER_MICROSECOND;
pulses[pulseIndex++] = pulseDuration;
if (pulseIndex >= maxEntries - 1)
break;
isMark = false;
lastTransitionTime = currentLastLightTime;
transitionCount = 0;
if (hasStarted && isMark) {
if (timeSinceLastLight >=
DEMODULATION_SPACE_THRESHOLD * CYCLES_PER_MICROSECOND) {
// mark -> space?
if (!candidateTransitionActive) {
candidateTransitionActive = true;
candidateTransitionStart = now;
} else if (now - candidateTransitionStart >=
DEMODULATION_HYSTERESIS_DELAY * CYCLES_PER_MICROSECOND) {
// mark -> space (confirmed after hysteresis delay)
u32 pulseDuration = (currentLastLightTime - lastTransitionTime) /
CYCLES_PER_MICROSECOND;
pulses[pulseIndex++] = pulseDuration;
if (pulseIndex >= maxEntries - 1)
break;
isMark = false;
lastTransitionTime = currentLastLightTime;
transitionCount = 0;
candidateTransitionActive = false;
}
} else {
candidateTransitionActive = false;
}
}
// Timeouts