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Updated File example
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@ -1,50 +0,0 @@
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#include <FileIO.h>
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void setup() {
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Bridge.begin();
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SD.begin();
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boolean r;
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r=SD.exists("/arduino/test");
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if (r) error("1");
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r=SD.exists("/arduino");
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if (!r) error("2");
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r=SD.mkdir("/arduino/test");
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if (!r) error("3");
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r=SD.exists("/arduino/test");
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if (!r) error("4");
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File f = SD.open("/arduino/test/bla", FILE_WRITE);
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if (!f) error("5");
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f.println("CIAO!");
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f.close();
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delay(10000);
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r=SD.rmdir("/arduino/test");
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if (r) error("6");
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r=SD.remove("/arduino/test");
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if (r) error("7");
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r=SD.remove("/arduino/test/bla");
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if (!r) error("8");
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r=SD.rmdir("/arduino/test");
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if (!r) error("9");
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r=SD.exists("/arduino/test");
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if (r) error("10");
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}
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void error(const char *s) {
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Bridge.print("# ERROR ");
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Bridge.println(s);
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while (true);
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}
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void loop() {
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}
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@ -0,0 +1,65 @@
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/*
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Write to file using FileIO classes.
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This sketch demonstrate how to write file into the Yún filesystem.
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A shell script file is created in /tmp, and it is executed afterwards.
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*/
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#include <FileIO.h>
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void setup() {
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// Setup Bridge (needed every time we communicate with the Arduino Yún)
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Bridge.begin();
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// Setup Console
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Console.begin();
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// Buffering improves Console performance, but we must remember to
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// finish sending using the Console.flush() command.
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Console.buffer(64);
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// Setup File IO
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SD.begin();
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// Upload script used to gain network statistics
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uploadScript();
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}
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void loop() {
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// Run stats script every 5 secs.
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runScript();
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delay(5000);
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}
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void uploadScript() {
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// Write our shell script in /tmp
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// Using /tmp stores the script in RAM this way we can preserve
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// the limited amount of FLASH erase/write cycles
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File script = SD.open("/tmp/wlan-stats.sh", FILE_WRITE);
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script.print("#!/bin/sh\n");
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script.print("ifconfig wlan0 | grep \"RX bytes\" | tr ':' ' ' | awk \"{ print \\$3 \\\" \\\" \\$8 }\"\n");
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script.close();
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// Make the script executable
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Process chmod;
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chmod.begin("chmod");
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chmod.addParameter("+x");
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chmod.addParameter("/tmp/wlan-stats.sh");
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chmod.run();
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}
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void runScript() {
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// Launch script and show results on the console
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Process myscript;
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myscript.begin("/tmp/wlan-stats.sh");
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myscript.run();
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Console.print("WiFi RX/TX bytes: ");
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while (myscript.available()) {
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char c = myscript.read();
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Console.print(c);
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}
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Console.println();
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Console.flush();
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}
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