I have a program on a Mega 2560 that open two files and this have worked fine before. But not now I have no clue regarding why. I use the user SDfat library. Below is the code that relate to the Sd card.
The initiation works fine and if I comment out one of the file open statement the other opens fine. But if I have both only the first one will open.
in setup()
if (!sd.begin(53, SPI_HALF_SPEED))
Serial.println("Error SD init");
else
Serial.println("SD init");
// open the file for write at end like the Native SD library
if (!myFile.open("test.txt", O_RDWR | O_CREAT | O_AT_END))
{Serial.println("Opening test.txt for write failed");myFile.close();}
else
Serial.println("test.txt opened");
if (!myFile.open("dayslog.txt", O_RDWR | O_CREAT | O_AT_END))
{Serial.print("Opening dayslog.txt for write failed");myFile.getWriteError();}