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Saving data from Adc to SD card

Question asked by jendoubi saif ddine on Apr 12, 2018
Latest reply on Apr 13, 2018 by Andrew Neil

Hello everyone,

i've been trying to save adc values into a .txt file or .CSV

they both work fine, but i can't finda way to keep saving the current data directly "

f_write(&MyFile, msg, sizeof(msg), (void *)&byteswritten);

this function always go to the first line of the file and writeover the previous data, 

can anyone help with an example, And thanks in advance