Differences

This shows you the differences between two versions of the page.

--- esp32:direct_pin_data_copy [2019/09/27 07:26] – aistis
+++ esp32:direct_pin_data_copy [2019/09/27 07:34] (current) – aistis
@@ Line 26: / Line 26: @@
   }
 }
+</code>
+speed is like 3.5 times faster
+  * 07:31:40.620 -> register based read : 53
+  * 07:31:40.620 -> digitalRead based read : 172
+<code>
+  auto t1 = micros();
+  int v1;
+  for (int i=0;i<1000;i++)
+    v1 = (GPIO_REG_READ(GPIO_IN_REG) & BIT(25));
+  auto t2 = micros();
+  auto t3 = micros();
+  for (int i=0;i<1000;i++)
+    v1 = digitalRead(25);
+  auto t4 = micros();
+  Serial.printf("register based read : %d\n",t2-t1);
+  Serial.printf("digitalRead based read : %d\n",t4-t3);
 </code>