en-us_commands:reference:fifo
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Table of Contents
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 IDbool IN — Store input on the rising edgebool OUT — Output on the rising edgeuint16_t input — Word to storeuint16_t &output — Reference variable receiving the outputuint8_t size — Buffer sizebool 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.
Built-in Commands in the Same Category
en-us_commands/reference/fifo.1788796396.txt.gz · Last modified: by 127.0.0.1