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83166f948b
* Deprecate SPIFFS, move examples to LittleFS SPIFFS has been a great filesystem, but it has significant problems in many cases (and it's also pretty slow). Development seems to have slowed/stopped on the upstream version, and we're not able to provide support or fix the known issues with it as-is. Deprecate SPIFFS variable. Update all examples to use LittleFS instead of SPIFFS. Also, minor cleanup on very old examples which has obsolete delays waiting for the Serial port to come up, or which were stuck at 9600 baud because of their ancient AVR heritage. Fixes #7095 * Remove leftover debug code * Clean up comments in some examples * Update documentation on SPIFFS deprecation * Fix host tests to avoid deprecation warnings * Fix cut-n-paste error * Restore SpeedTest.ino, adjust to allow custom FSes Co-authored-by: Develo <deveyes@gmail.com>
62 lines
1.3 KiB
C++
62 lines
1.3 KiB
C++
/*
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SD card file dump
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This example shows how to read a file from the SD card using the
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SD library and send it over the serial port.
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The circuit:
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SD card attached to SPI bus as follows:
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** MOSI - pin 11
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** MISO - pin 12
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** CLK - pin 13
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** CS - pin 4
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created 22 December 2010
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by Limor Fried
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modified 9 Apr 2012
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by Tom Igoe
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This example code is in the public domain.
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*/
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#include <SPI.h>
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#include <SD.h>
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const int chipSelect = 4;
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void setup() {
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// Open serial communications and wait for port to open:
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Serial.begin(115200);
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Serial.print("Initializing SD card...");
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// see if the card is present and can be initialized:
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if (!SD.begin(chipSelect)) {
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Serial.println("Card failed, or not present");
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// don't do anything more:
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return;
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}
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Serial.println("card initialized.");
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// open the file. note that only one file can be open at a time,
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// so you have to close this one before opening another.
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File dataFile = SD.open("datalog.txt");
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// if the file is available, write to it:
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if (dataFile) {
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while (dataFile.available()) {
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Serial.write(dataFile.read());
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}
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dataFile.close();
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}
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// if the file isn't open, pop up an error:
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else {
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Serial.println("error opening datalog.txt");
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}
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}
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void loop() {
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}
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