Add Stream support to SerialFlashFile

[sandeepmistry]

It would be nice if SerialFlashFile extended Stream like the SD' libraries File class.

Here's a simple sketch to test with:

#include <SerialFlash.h>

const char* filename = "test.txt";


void setup() {
  Serial.begin(9600);
  while (!Serial);

  SerialFlash.begin(ONBOARD_FLASH_SPI_PORT, ONBOARD_FLASH_CS_PIN);

  SerialFlash.eraseAll();
  while (!SerialFlash.ready());

  SerialFlash.create("test.txt", 24);

  SerialFlashFile flashFileOut = SerialFlash.open(filename);
  flashFileOut.println("blah 1");
  flashFileOut.println("blah 2");
  flashFileOut.println("blah 3");
  flashFileOut.close();

  SerialFlashFile flashFileIn = SerialFlash.open(filename);
  while (flashFileIn.available()) {
    Serial.print("peek = 0x");
    Serial.println(flashFileIn.peek(), HEX);

    Serial.print("read = ");
    Serial.println((char)flashFileIn.read());
  }
}

void loop() {
}

cc/ @cmaglie @facchinm

[sandeepmistry]

@PaulStoffregen ping, any interest in this change and the other one proposed in #42?

[Nathan-ma]

oh this is very interesting.