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Prevent SD access from resetting ESP32 #16690

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Merged
thinkyhead merged 2 commits into from
Jan 28, 2020
Merged

Prevent SD access from resetting ESP32 #16690

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a071d57
ESP32: reset task wdt in SdVolume::freeClusterCount()
felixstorm-c4a8 Jan 27, 2020
49aa721
Update SdVolume.cpp
thinkyhead Jan 28, 2020
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10 changes: 10 additions & 0 deletions Marlin/src/sd/SdVolume.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -291,6 +291,16 @@ int32_t SdVolume::freeClusterCount() {
for (uint16_t i = 0; i < n; i++)
if (cacheBuffer_.fat32[i] == 0) free++;
}
#ifdef ESP32
// Needed to reset the idle task watchdog timer on ESP32 as reading the complete FAT may easily
// block for 10+ seconds. yield() is insufficient since it blocks lower prio tasks (e.g., idle).
static millis_t nextTaskTime = 0;
const millis_t ms = millis();
if (ELAPSED(ms, nextTaskTime) {
vTaskDelay(1); // delay 1 tick (Minimum. Usually 10 or 1 ms depending on skdconfig.h)
nextTaskTime = ms + 1000; // tickle the task manager again in 1 second
}
#endif // ESP32
}
return free;
}
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