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Fix delayMicroseconds() to use 64bit period

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fixes: https://github.com/espressif/arduino-esp32/issues/5000
This commit is contained in:
me-no-dev 2021-04-05 15:15:09 +03:00
parent 5502879a5b
commit 8645971981
1 changed files with 4 additions and 4 deletions
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8
cores/esp32/esp32-hal-misc.c
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@ -160,15 +160,15 @@ void delay(uint32_t ms)
void ARDUINO_ISR_ATTR delayMicroseconds(uint32_t us) void ARDUINO_ISR_ATTR delayMicroseconds(uint32_t us)
{ {
uint32_t m = micros(); uint64_t m = (uint64_t)esp_timer_get_time();
if(us){ if(us){
uint32_t e = (m + us); uint64_t e = (m + us);
if(m > e){ //overflow if(m > e){ //overflow
while(micros() > e){ while((uint64_t)esp_timer_get_time() > e){
NOP(); NOP();
} }
} }
while(micros() < e){ while((uint64_t)esp_timer_get_time() < e){
NOP(); NOP();
} }
} }