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This is my first try on writing modules and I wrote a few lines and wanted to try it out and see if it works like intended. I took the makefile from the ettr module and changed the names for the output but if I run make, no *.o file is produced. compiling the other modules works fine but not with my *.c file. I looked through other *.c and makefiles but could not solve it.

I work with the lua_fix branch and took a lot of code from the sourcefiles or other modules (especially lua module, I tried some of this with a lua sript). I'm not very experienced with programming in C so feel free to comment 

my makefile:

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# this is a very simple makefile for modules
TOP_DIR=../..

# define the module name - make sure name is max 8 characters
MODULE_NAME=ortho
MODULE_OBJS=ortho.o

# include modules environment
include $(TOP_DIR)/modules/Makefile.modules


and my .c file:

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#include "module.h"
#include "focus.h"
#include "dryos.h"
#include "bmp.h"
#include "menu.h"
#include "property.h"
#include "config.h"
#include "af_patterns.h"
#include "lens.h"
#include "lvinfo.h"
#include "shoot.h"
extern void bmp_on;
extern void bmp_off;
static int afp[2];
static int afp_len = 0;
static int x=720;
static int y=480;
PROP_HANDLER(PROP_AFPOINT)
{
    afp[0] = buf[0];
    afp[1] = buf[1];
    afp_len = len;
}

static int autofocus()
{
msleep(500);
module_send_keypress(MODULE_KEY_PRESS_HALFSHUTTER);
if (wait_focus_status(3000, 3, 3))
    {
        if (wait_focus_status(5000, 1, 2))
        {
            module_send_keypress(MODULE_KEY_UNPRESS_HALFSHUTTER);
            lens_focus(1,1,1,0);
            lens_focus(1,-1,1,0);
            msleep(500);
            return 1;
        }
}
    else
    {
module_send_keypress(MODULE_KEY_UNPRESS_HALFSHUTTER);
        return 0;
    }

}

static void orthogonator()
{
msleep(2000);
force_liveview();
bmp_off();
bmp_on();
if (!afp_len || !lens_info.name) return;
lens_setup_af(AF_ENABLE);
afp[0] = AF_POINT_C;
prop_request_change(PROP_AFPOINT, afp, afp_len);
if(autofocus()) bmp_printf(FONT_MED,x/2,y/2,"%d",lens_info.focus_pos);
afp[0] = AF_POINT_T;
prop_request_change(PROP_AFPOINT, afp, afp_len);
if(autofocus()) bmp_printf(FONT_MED,x/2,y/4,"%d",lens_info.focus_pos);
afp[0] = AF_POINT_R;
prop_request_change(PROP_AFPOINT, afp, afp_len);
if(autofocus()) bmp_printf(FONT_MED,3*x/4,y/2,"%d",lens_info.focus_pos);
afp[0] = AF_POINT_B;
prop_request_change(PROP_AFPOINT, afp, afp_len);
if(autofocus()) bmp_printf(FONT_MED,x/2,y*3/4,"%d",lens_info.focus_pos);
afp[0] = AF_POINT_L;
prop_request_change(PROP_AFPOINT, afp, afp_len);
if(autofocus()) bmp_printf(FONT_MED,x/4,y/2,"%d",lens_info.focus_pos);
}

static struct menu_entry ortho_menu[] =
{
    {
        .name       = "Orthogonator",
        .select     = run_in_separate_task,
        .priv       = orthogonator,
        .help       = "",
    },
};

static unsigned int ortho_init()
{
    menu_add("Focus", ortho_menu, COUNT(ortho_menu));
    return 0;
}

static unsigned int ortho_deinit()
{
    return 0;
}

MODULE_INFO_START()
    MODULE_INIT(ortho_init)
    MODULE_DEINIT(ortho_deinit)
MODULE_INFO_END()

MODULE_PROPHANDLERS_START()
    MODULE_PROPHANDLER(PROP_AFPOINT)
MODULE_PROPHANDLERS_END()


I'm working on a projekt, where I try to get the orientation of a plane by reading the focus motor position with different focuspoints on my 50d with the magiclanter-lua_fix.2017Jul06.50D109 build.
I already managed to automaticly focus and get the correct motor position with lens.focus_pos but I always have to change the focuspoint manually.
I got the Idea to use the key.press() funktion to automaticly change the focuspoints, but KEY.ZOOMIN (same hardware key as for choosing focuspoints) only works to zoom in on pictures.
I tried to use the keys:getkey() funtion to see, if i used the wrong key code for choosing focuspoints, but I always get an error in ML/Scripts/lib/keys.lua. With the following code I get an error in line 48: bad argument #1 to 'remove' ...

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require('keys')
console.clear()
console.show()
console.write('press Key')
task.yield(500)
console.write(keys:getkey())


By using keys:keys() befor calling keys:getkey() I get the error: attempt to call a nil value (method 'keys)

Is there any point I'm missing or does anyone have a better idea for solving this problem?

Thanks in advance

Alexander