bendns' repos / ArduinoStuff
arduino stuffs
Diffstat (limited to 'libraries/SD/examples/NonBlockingWrite/NonBlockingWrite.ino')
-rw-r--r--libraries/SD/examples/NonBlockingWrite/NonBlockingWrite.ino91
1 files changed, 0 insertions, 91 deletions
diff --git a/libraries/SD/examples/NonBlockingWrite/NonBlockingWrite.ino b/libraries/SD/examples/NonBlockingWrite/NonBlockingWrite.ino
deleted file mode 100644
index 29d8ec6..0000000
--- a/libraries/SD/examples/NonBlockingWrite/NonBlockingWrite.ino
+++ /dev/null
@@ -1,91 +0,0 @@
-/*
- Non-blocking Write
-
- This example demonstrates how to perform non-blocking writes
- to a file on a SD card. The file will contain the current millis()
- value every 10ms. If the SD card is busy, the data will be buffered
- in order to not block the sketch.
-
- NOTE: myFile.availableForWrite() will automatically sync the
- file contents as needed. You may lose some unsynced data
- still if myFile.sync() or myFile.close() is not called.
-
- The circuit:
- - Arduino MKR Zero board
- - micro SD card attached
-
- This example code is in the public domain.
-*/
-
-#include <SD.h>
-
-// file name to use for writing
-const char filename[] = "demo.txt";
-
-// File object to represent file
-File txtFile;
-
-// string to buffer output
-String buffer;
-
-unsigned long lastMillis = 0;
-
-void setup() {
- Serial.begin(9600);
- while (!Serial);
-
- // reserve 1kB for String used as a buffer
- buffer.reserve(1024);
-
- // set LED pin to output, used to blink when writing
- pinMode(LED_BUILTIN, OUTPUT);
-
- // init the SD card
- if (!SD.begin()) {
- Serial.println("Card failed, or not present");
- // don't do anything more:
- while (1);
- }
-
- // If you want to start from an empty file,
- // uncomment the next line:
- // SD.remove(filename);
-
- // try to open the file for writing
- txtFile = SD.open(filename, FILE_WRITE);
- if (!txtFile) {
- Serial.print("error opening ");
- Serial.println(filename);
- while (1);
- }
-
- // add some new lines to start
- txtFile.println();
- txtFile.println("Hello World!");
-}
-
-void loop() {
- // check if it's been over 10 ms since the last line added
- unsigned long now = millis();
- if ((now - lastMillis) >= 10) {
- // add a new line to the buffer
- buffer += "Hello ";
- buffer += now;
- buffer += "\r\n";
-
- lastMillis = now;
- }
-
- // check if the SD card is available to write data without blocking
- // and if the buffered data is enough for the full chunk size
- unsigned int chunkSize = txtFile.availableForWrite();
- if (chunkSize && buffer.length() >= chunkSize) {
- // write to file and blink LED
- digitalWrite(LED_BUILTIN, HIGH);
- txtFile.write(buffer.c_str(), chunkSize);
- digitalWrite(LED_BUILTIN, LOW);
-
- // remove written data from buffer
- buffer.remove(0, chunkSize);
- }
-}