Ano-sys
59 lines
1.2 KiB
Arduino
59 lines
1.2 KiB
Arduino
#include <SPI.h>
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#include <SD.h>
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typedef enum{
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FAM_R,
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FAM_W
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} FileAccessMode;
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class SDHelper {
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private:
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uint8_t _cs;
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FileAccessMode _fam;
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File _stream;
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String _filename;
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bool _available = false;
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SPIClass _spi(HSPI);
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String getNewFilename() {
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static unsigned long i = 0;
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String name;
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do {
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name = "coords" + String(i++) + ".txt";
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} while (SD.exists(name.c_str()));
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return name;
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}
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public:
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SDHelper(uint8_t csPin, FileAccessMode fam, String filename = "") : _cs(csPin), _fam(fam) {
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_spi.begin(14, 2, 15, 13);
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if(!SD.begin(_cs, _spi)){
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_available = false;
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return;
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}
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if(_fam == FAM_W){
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_filename = filename.length() ? filename : getNewFilename();
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_stream = SD.open(_filename.c_str(), FILE_WRITE);
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}
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else {
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_filename = filename;
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_stream = SD.open(_filename.c_str(), FILE_READ);
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}
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_available = (bool)_stream;
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}
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~SDHelper(){
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if(_stream) _stream.close();
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}
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bool Available() const { return _available; }
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const String& filename() const { return _filename; }
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void Log(const String& msg) {
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if(_fam != FAM_W || !_stream) return;
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_stream.println(msg);
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_stream.flush();
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}
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};
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