Fix delayMicroseconds() to use 64bit period

me-no-dev · me-no-dev · commit 864597198196 · 2021-04-05T15:15:09.000+03:00
fixes: espressif#5000
diff --git a/cores/esp32/esp32-hal-misc.c b/cores/esp32/esp32-hal-misc.c
@@ -160,15 +160,15 @@ void delay(uint32_t ms)
 
 void ARDUINO_ISR_ATTR delayMicroseconds(uint32_t us)
 {
-    uint32_t m = micros();
+    uint64_t m = (uint64_t)esp_timer_get_time();
     if(us){
-        uint32_t e = (m + us);
+        uint64_t e = (m + us);
         if(m > e){ //overflow
-            while(micros() > e){
+            while((uint64_t)esp_timer_get_time() > e){
                 NOP();
             }
         }
-        while(micros() < e){
+        while((uint64_t)esp_timer_get_time() < e){
             NOP();
         }
     }

Original file line number	Diff line number	Diff line change
`@@ -160,15 +160,15 @@ void delay(uint32_t ms)`
`160`	`160`
`161`	`161`	`void ARDUINO_ISR_ATTR delayMicroseconds(uint32_t us)`
`162`	`162`	`{`
`163`		`- uint32_t m = micros();`
	`163`	`+ uint64_t m = (uint64_t)esp_timer_get_time();`
`164`	`164`	`if(us){`
`165`		`- uint32_t e = (m + us);`
	`165`	`+ uint64_t e = (m + us);`
`166`	`166`	`if(m > e){ //overflow`
`167`		`- while(micros() > e){`
	`167`	`+ while((uint64_t)esp_timer_get_time() > e){`
`168`	`168`	`NOP();`
`169`	`169`	`}`
`170`	`170`	`}`
`171`		`- while(micros() < e){`
	`171`	`+ while((uint64_t)esp_timer_get_time() < e){`
`172`	`172`	`NOP();`
`173`	`173`	`}`
`174`	`174`	`}`