Hello, I have changed the board and cards but now getting only "Initializing SD card.." message with no further progress..
using codes form "C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\SD\exa mples\listfiles" etc. but similar results
#include <SD.h>
// change this to match your SD shield or module;
// Teensy 2.0: pin 0
// Teensy++ 2.0: pin 20
// Wiz820+SD board: pin 4
// Teensy audio board: pin 10
// Teensy 3.5 & 3.6 & 4.1 on-board: BUILTIN_SDCARD
const int chipSelect = 10;
void setup()
{
//Uncomment these lines for Teensy 3.x Audio Shield (Rev C)
SPI.setMOSI(11); // Audio shield has MOSI on pin 7
SPI.setSCK(13); // Audio shield has SCK on pin 14
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect.
}
Serial.print("Initializing SD card...");
if (!SD.begin(chipSelect)) {
Serial.println("initialization failed!");
return;
}
Serial.println("initialization done.");
File root = SD.open("/");
printDirectory(root, 0);
Serial.println("done!");
}
void loop()
{
// nothing happens after setup finishes.
}
void printDirectory(File dir, int numSpaces) {
while(true) {
File entry = dir.openNextFile();
if (! entry) {
//Serial.println("** no more files **");
break;
}
printSpaces(numSpaces);
Serial.print(entry.name());
if (entry.isDirectory()) {
Serial.println("/");
printDirectory(entry, numSpaces+2);
} else {
// files have sizes, directories do not
unsigned int n = log10(entry.size());
if (n > 10) n = 10;
printSpaces(50 - numSpaces - strlen(entry.name()) - n);
Serial.print(" ");
Serial.print(entry.size(), DEC);
DateTimeFields datetime;
if (entry.getModifyTime(datetime)) {
printSpaces(4);
printTime(datetime);
}
Serial.println();
}
entry.close();
}
}
void printSpaces(int num) {
for (int i=0; i < num; i++) {
Serial.print(" ");
}
}
void printTime(const DateTimeFields tm) {
const char *months[12] = {
"January","February","March","April","May","Ju ne",
"July","August","September","October","November"," December"
};
if (tm.hour < 10) Serial.print('0');
Serial.print(tm.hour);
Serial.print(':');
if (tm.min < 10) Serial.print('0');
Serial.print(tm.min);
Serial.print(" ");
Serial.print(tm.mon < 12 ? months[tm.mon] : "???");
Serial.print(" ");
Serial.print(tm.mday);
Serial.print(", ");
Serial.print(tm.year + 1900);
}
