Supports both the FAT16 and FAT32 file systems so can access large capacity memory sticks. Append input to end of existing file. Print a single line of free binary option picks, current dir only. Useful for reading a configuration file.
This would read the first 3 lines of file test. Print a section of a file, current dir only. Useful when reading in a complete file, but splitting it into smaller chunks. It can also be the character ‘n’ which starts from the last read position. Return size of in bytes or number of lines. The number of lines is useful when reading a configuration file. Display list of files matching filename.
Display the VID and PID of the attached device. The USB Host Board has a real time clock on-board. When you have set the date and time the real time clock will keep track of the correct date and time. Files created will have the correct time and date stamp. The time and date can also be read in to your controller and then used in your output string. The Real Time Clock is maintained by the main crystal oscillator and not by a dedicated watch crystal. It should be accurate to within a few seconds per day.