How to work with FFS¶

Initialization:

    int num_free = 0;
    int num_used = 0;

Get camera's FFS info:

    stat = xiGetParamInt(xiH, XI_PRM_FREE_FFS_SIZE, &num_free);
    HandleResult(stat,"xiGetParamInt (XI_PRM_FREE_FFS_SIZE)");
    stat = xiGetParamInt(xiH, XI_PRM_USED_FFS_SIZE, &num_used);
    HandleResult(stat,"xiGetParamInt (XI_PRM_USED_FFS_SIZE)\n\n");

    printf("FFS stats:\n");
    printf("Free bytes : %d \n", num_free);
    printf("Used bytes : %d \n", num_used);

Write file to camera's FFS:

    char test_file[MAX_PATH]="test.txt";
    char test_text[MAX_PATH]="Example of user text, that can be stored in camera.";

    stat = xiSetParamString(xiH, XI_PRM_FFS_FILE_NAME, test_file, MAX_PATH);
    HandleResult(stat,"xiSetParamString (XI_PRM_FFS_FILE_NAME)");
    stat = xiSetParamString(xiH, XI_PRM_WRITE_FILE_FFS, test_text, MAX_PATH);
    HandleResult(stat,"xiSetParamString (XI_PRM_WRITE_FILE_FFS)");

Read data from camera's FFS:

    char read_text[MAX_PATH]="";    
    stat = xiGetParamString(xiH, XI_PRM_READ_FILE_FFS, read_text, MAX_PATH);
    HandleResult(stat,"xiSetParamString (XI_PRM_READ_FILE_FFS)");

    printf("Text read from FFS:\n%s\n\n", read_text);

Get camera's FFS info:

    stat = xiGetParamInt(xiH, XI_PRM_FREE_FFS_SIZE, &num_free);
    HandleResult(stat,"xiGetParamInt (XI_PRM_FREE_FFS_SIZE)");
    stat = xiGetParamInt(xiH, XI_PRM_USED_FFS_SIZE, &num_used);
    HandleResult(stat,"xiGetParamInt (XI_PRM_USED_FFS_SIZE)\n\n");

    printf("FFS stats:\n");
    printf("Free bytes : %d \n", num_free);
    printf("Used bytes : %d \n", num_used);

The complete source code can be downloaded from here: sample_for_working_with_FFS.cpp.