Differences

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--- en-us_commands:reference:fifo [2026/09/07 23:35] – 바깥 편집 127.0.0.1
+++ en-us_commands:reference:fifo [2026/09/12 23:27] (current) – 바깥 편집 127.0.0.1
@@ Line 14: / Line 14: @@
 ===== Example =====
+Send ''i'' twice from Serial Monitor to store 10 and 20. Send ''o'' twice to read 10 and then 20. Send ''r'' to empty the buffer.
 <code cpp>
-uint16_t fifoValue = 0;
+uint16_t nextValue = 10;
-uint16_t filoValue = 0;
+uint16_t removedValue = 0;
-uint16_t sequence = 0;
 void setup() {
   Serial.begin(115200);
+  Serial.println(F("i: store, o: take, r: reset"));
 }
 void loop() {
-  const bool store = Iup(0, IdigitalRead(0, 5));  // Read the input repeatedly and update only if all samples match. If HIGH and LOW are mixed, retain the previous stable state. / Return true only at the instant the input changes from OFF to ON.
+  if (!Serial.available()) return;
-  const bool release = Iup(1, IdigitalRead(1, 5));  // Read the input repeatedly and update only if all samples match. If HIGH and LOW are mixed, retain the previous stable state. / Return true only at the instant the input changes from OFF to ON.
+  const char key = Serial.read();
-  const bool reset = IdigitalRead(2, 5);  // Read the input repeatedly and update only if all samples match. If HIGH and LOW are mixed, retain the previous stable state.
+  const bool store = key == 'i';
+  const bool take = key == 'o';
+  const bool reset = key == 'r';
+  if (!store && !take && !reset) return;
-  if (store) ++sequence;
+  const bool ok = FIFO(0, store, take, nextValue, removedValue, 4, reset);  // Store or retrieve a value on the rising edge of IN or OUT.
-  const bool fifoOk = FIFO(0, store, release, sequence, fifoValue, 16, reset);  // Output the first stored 16-bit data first.
+  FIFO(0, false, false, 0, removedValue, 4);  // Return IN and OUT to OFF so the next key creates a new rising edge.
-  const bool filoOk = FILO(0, store, release, sequence, filoValue, 16, reset);  // Output the last stored 16-bit data first.
-  if (release && fifoOk && filoOk) {
+  if (reset) {
-    Serial.print(F("oldest=")); Serial.print(fifoValue);
+    nextValue = 10;
-    Serial.print(F(", newest=")); Serial.println(filoValue);
+    Serial.println(F("buffer cleared"));
+  } else if (!ok) {
+    Serial.println(F("buffer full or empty"));
+  } else if (store) {
+    Serial.print(F("stored: "));
+    Serial.println(nextValue);
+    nextValue += 10;
+  } else {
+    Serial.print(F("taken: "));
+    Serial.println(removedValue);
   }
 }
 </code>
+Pushing to a full buffer or popping from an empty one fails.
 ===== Precautions =====
 ''IN'', ''OUT'', ''CU'' and ''CD'' act on rising edges. Use a unique ''id'' for each counter or buffer, and keep ''size'' to the required minimum.
+===== Built-in Commands in the Same Category =====
+  * [[:en-us_commands:reference:filo|FILO() View detailed description]]
 [[:en-us_commands:builtin|← Built-in Command List]]