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FIFO()

FIFO() outputs the first stored 16-bit data first.

bool FIFO(uint8_t fifo_id, bool IN, bool OUT, uint16_t input, uint16_t &output, uint8_t size, bool reset = false)

Commands

Command	Arguments	Return Value	Operation
`FIFO(fifo_id, IN, OUT, input, output, size, reset)`	`uint8_t fifo_id` — Buffer ID `bool IN` — Store input on the rising edge `bool OUT` — Output on the rising edge `uint16_t input` — Word to store `uint16_t &output` — Reference variable receiving the output `uint8_t size` — Buffer size `bool reset = false` — Reset the buffer	`bool`	Outputs the first stored 16-bit data first.

Example

uint16_t fifoValue = 0;
uint16_t filoValue = 0;
uint16_t sequence = 0;
 
void setup() {
  Serial.begin(115200);
}
 
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.
  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 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.
 
  if (store) ++sequence;
  const bool fifoOk = FIFO(0, store, release, sequence, fifoValue, 16, reset);  // Output the first stored 16-bit data first.
  const bool filoOk = FILO(0, store, release, sequence, filoValue, 16, reset);  // Output the last stored 16-bit data first.
  if (release && fifoOk && filoOk) {
    Serial.print(F("oldest=")); Serial.print(fifoValue);
    Serial.print(F(", newest=")); Serial.println(filoValue);
  }
}

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.

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ILOGICS Product Documentation

Table of Contents

FIFO()

Commands

Example

Precautions