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Avoid unnecessary waveform de-initialization #4913

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Jul 10, 2018
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2 changes: 1 addition & 1 deletion cores/esp8266/core_esp8266_waveform.c
Original file line number Diff line number Diff line change
Expand Up @@ -205,7 +205,7 @@ int startWaveform(uint8_t pin, uint32_t timeHighUS, uint32_t timeLowUS, uint32_t
// Stops a waveform on a pin
int stopWaveform(uint8_t pin) {
for (size_t i = 0; i < countof(waveform); i++) {
if (((pin == 16) && waveform[i].gpio16Mask) || ((pin != 16) && (waveform[i].gpioMask == 1<<pin))) {
if ((((pin == 16) && waveform[i].gpio16Mask) || ((pin != 16) && (waveform[i].gpioMask == 1<<pin))) && waveform[i].enabled) {
// Note that there is no interrupt unsafety here. The IRQ can only ever change .enabled from 1->0
// We're also doing that, so even if an IRQ occurred it would still stay as 0.
waveform[i].enabled = 0;
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