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Prevent SD access from resetting ESP32 (#16690)

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felixstorm 2020-01-28 01:16:44 +01:00 committed by Scott Lahteine
parent 0c3cae59d9
commit e4eaf32b4d
1 changed files with 10 additions and 0 deletions
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10
Marlin/src/sd/SdVolume.cpp
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@ -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;
}