SD.h and RDWR

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In my code on the ESP32 I use for a file to open for RDWR :

file_RW = sd.open("/vm.mem",O_RDWR);

How to to this for the teensy 4.1? The above code wont works in the Teensy 4.1.

sheers,

Jan
 
Best to check the examples of SD library

Edit: AFAIK, Problem is that O_RDWR and similar SdFat declarations are not Arduino compatible
 
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