How access to display device in embedded-linux + Qt ? /dev/fb0 not found











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1-I have built Qt5.4.1 and Qt4.8.4 for an embedded device (based on armv5tejl) and all things work except GUI.



2-It seems that no frame buffer device exists:



~/bin $ ls -alh /dev/

drwxr-xr-x    3 0        sandbox        0 Nov 10 11:48 .

drwxr-xr-x   14 0        root           0 Nov 14  2017 ..

srw-rw-rw-    1 0        root           0 Nov 10 11:48 log

crw-rw-rw-    1 0        root        1,   3 Nov 10 11:48 null

crw-rw-rw-    1 0        root        5,   2 Nov 10 12:10 ptmx

drwxr-xr-x    2 0        root           0 Jan  1  1970 pts

crw-rw-rw-    1 0        root        5,   0 Nov 10 11:48 tty

crw-rw-rw-    1 0        root      204,  66 Nov 10 12:05 ttyAMA2

crw-r--r--    1 0        root        1,   9 Nov 10 11:48 urandom





/proc $ cat devices 

Character devices:

  1 mem

  4 /dev/vc/0

  4 tty

  5 /dev/tty

  5 /dev/console

  5 /dev/ptmx

  7 vcs

 10 misc

/proc $ cat devices 

Character devices:

  1 mem

  4 /dev/vc/0

  4 tty

  5 /dev/tty

  5 /dev/console

  5 /dev/ptmx

  7 vcs

 10 misc

 13 input

 21 sg

 29 fb

 89 i2c

 90 mtd

100 softkey

116 alsa

122 pman

128 ptm

136 pts

150 pwmr

153 upc

154 kdrv_csc

180 usb

189 usb_device

204 ttyAMA

254 rtc



Block devices:

  1 ramdisk

259 blkext

  8 sd

 31 mtdblock

 65 sd

 66 sd

 67 sd

 68 sd

 69 sd

 70 sd

 71 sd

128 sd

129 sd

130 sd

131 sd

132 sd

133 sd

134 sd

135 sd


3-from dmesg log:



Console: switching to colour frame buffer device 80x30

CLCD: PL110 CLCD hardware, HIE AT-T050QGH-02, VGA Landscape (supports 640x480 @ 24Mhz) display


4-Device itself has a SDK and display things using that SDK and libs in HTML format.



5-I have a restricted user on the device and I'm using my own BusyBox v1.20.0.



My Questions:



1-Is it possible for me to use device display via Qt without using provided SDK?



2-How could I access to the display device?



Any help would be appreciated.



Thank you very much






qt embedded-linux display framebuffer







share|improve this question









New contributor




Vahid Moslemi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
























    up vote
    0
    down vote

    favorite












    1-I have built Qt5.4.1 and Qt4.8.4 for an embedded device (based on armv5tejl) and all things work except GUI.



    2-It seems that no frame buffer device exists:



    ~/bin $ ls -alh /dev/
    
drwxr-xr-x    3 0        sandbox        0 Nov 10 11:48 .
    
drwxr-xr-x   14 0        root           0 Nov 14  2017 ..
    
srw-rw-rw-    1 0        root           0 Nov 10 11:48 log
    
crw-rw-rw-    1 0        root        1,   3 Nov 10 11:48 null
    
crw-rw-rw-    1 0        root        5,   2 Nov 10 12:10 ptmx
    
drwxr-xr-x    2 0        root           0 Jan  1  1970 pts
    
crw-rw-rw-    1 0        root        5,   0 Nov 10 11:48 tty
    
crw-rw-rw-    1 0        root      204,  66 Nov 10 12:05 ttyAMA2
    
crw-r--r--    1 0        root        1,   9 Nov 10 11:48 urandom
    




    /proc $ cat devices 
    
Character devices:
    
  1 mem
    
  4 /dev/vc/0
    
  4 tty
    
  5 /dev/tty
    
  5 /dev/console
    
  5 /dev/ptmx
    
  7 vcs
    
 10 misc
    
/proc $ cat devices 
    
Character devices:
    
  1 mem
    
  4 /dev/vc/0
    
  4 tty
    
  5 /dev/tty
    
  5 /dev/console
    
  5 /dev/ptmx
    
  7 vcs
    
 10 misc
    
 13 input
    
 21 sg
    
 29 fb
    
 89 i2c
    
 90 mtd
    
100 softkey
    
116 alsa
    
122 pman
    
128 ptm
    
136 pts
    
150 pwmr
    
153 upc
    
154 kdrv_csc
    
180 usb
    
189 usb_device
    
204 ttyAMA
    
254 rtc
    

    
Block devices:
    
  1 ramdisk
    
259 blkext
    
  8 sd
    
 31 mtdblock
    
 65 sd
    
 66 sd
    
 67 sd
    
 68 sd
    
 69 sd
    
 70 sd
    
 71 sd
    
128 sd
    
129 sd
    
130 sd
    
131 sd
    
132 sd
    
133 sd
    
134 sd
    
135 sd


    3-from dmesg log:



    Console: switching to colour frame buffer device 80x30
    
CLCD: PL110 CLCD hardware, HIE AT-T050QGH-02, VGA Landscape (supports 640x480 @ 24Mhz) display


    4-Device itself has a SDK and display things using that SDK and libs in HTML format.



    5-I have a restricted user on the device and I'm using my own BusyBox v1.20.0.



    My Questions:



    1-Is it possible for me to use device display via Qt without using provided SDK?



    2-How could I access to the display device?



    Any help would be appreciated.



    Thank you very much






    qt embedded-linux display framebuffer







    share|improve this question









    New contributor




    Vahid Moslemi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






















      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      1-I have built Qt5.4.1 and Qt4.8.4 for an embedded device (based on armv5tejl) and all things work except GUI.



      2-It seems that no frame buffer device exists:



      ~/bin $ ls -alh /dev/
      
drwxr-xr-x    3 0        sandbox        0 Nov 10 11:48 .
      
drwxr-xr-x   14 0        root           0 Nov 14  2017 ..
      
srw-rw-rw-    1 0        root           0 Nov 10 11:48 log
      
crw-rw-rw-    1 0        root        1,   3 Nov 10 11:48 null
      
crw-rw-rw-    1 0        root        5,   2 Nov 10 12:10 ptmx
      
drwxr-xr-x    2 0        root           0 Jan  1  1970 pts
      
crw-rw-rw-    1 0        root        5,   0 Nov 10 11:48 tty
      
crw-rw-rw-    1 0        root      204,  66 Nov 10 12:05 ttyAMA2
      
crw-r--r--    1 0        root        1,   9 Nov 10 11:48 urandom
      




      /proc $ cat devices 
      
Character devices:
      
  1 mem
      
  4 /dev/vc/0
      
  4 tty
      
  5 /dev/tty
      
  5 /dev/console
      
  5 /dev/ptmx
      
  7 vcs
      
 10 misc
      
/proc $ cat devices 
      
Character devices:
      
  1 mem
      
  4 /dev/vc/0
      
  4 tty
      
  5 /dev/tty
      
  5 /dev/console
      
  5 /dev/ptmx
      
  7 vcs
      
 10 misc
      
 13 input
      
 21 sg
      
 29 fb
      
 89 i2c
      
 90 mtd
      
100 softkey
      
116 alsa
      
122 pman
      
128 ptm
      
136 pts
      
150 pwmr
      
153 upc
      
154 kdrv_csc
      
180 usb
      
189 usb_device
      
204 ttyAMA
      
254 rtc
      

      
Block devices:
      
  1 ramdisk
      
259 blkext
      
  8 sd
      
 31 mtdblock
      
 65 sd
      
 66 sd
      
 67 sd
      
 68 sd
      
 69 sd
      
 70 sd
      
 71 sd
      
128 sd
      
129 sd
      
130 sd
      
131 sd
      
132 sd
      
133 sd
      
134 sd
      
135 sd


      3-from dmesg log:



      Console: switching to colour frame buffer device 80x30
      
CLCD: PL110 CLCD hardware, HIE AT-T050QGH-02, VGA Landscape (supports 640x480 @ 24Mhz) display


      4-Device itself has a SDK and display things using that SDK and libs in HTML format.



      5-I have a restricted user on the device and I'm using my own BusyBox v1.20.0.



      My Questions:



      1-Is it possible for me to use device display via Qt without using provided SDK?



      2-How could I access to the display device?



      Any help would be appreciated.



      Thank you very much






      qt embedded-linux display framebuffer







      share|improve this question









      New contributor




      Vahid Moslemi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      1-I have built Qt5.4.1 and Qt4.8.4 for an embedded device (based on armv5tejl) and all things work except GUI.



      2-It seems that no frame buffer device exists:



      ~/bin $ ls -alh /dev/
      
drwxr-xr-x    3 0        sandbox        0 Nov 10 11:48 .
      
drwxr-xr-x   14 0        root           0 Nov 14  2017 ..
      
srw-rw-rw-    1 0        root           0 Nov 10 11:48 log
      
crw-rw-rw-    1 0        root        1,   3 Nov 10 11:48 null
      
crw-rw-rw-    1 0        root        5,   2 Nov 10 12:10 ptmx
      
drwxr-xr-x    2 0        root           0 Jan  1  1970 pts
      
crw-rw-rw-    1 0        root        5,   0 Nov 10 11:48 tty
      
crw-rw-rw-    1 0        root      204,  66 Nov 10 12:05 ttyAMA2
      
crw-r--r--    1 0        root        1,   9 Nov 10 11:48 urandom
      




      /proc $ cat devices 
      
Character devices:
      
  1 mem
      
  4 /dev/vc/0
      
  4 tty
      
  5 /dev/tty
      
  5 /dev/console
      
  5 /dev/ptmx
      
  7 vcs
      
 10 misc
      
/proc $ cat devices 
      
Character devices:
      
  1 mem
      
  4 /dev/vc/0
      
  4 tty
      
  5 /dev/tty
      
  5 /dev/console
      
  5 /dev/ptmx
      
  7 vcs
      
 10 misc
      
 13 input
      
 21 sg
      
 29 fb
      
 89 i2c
      
 90 mtd
      
100 softkey
      
116 alsa
      
122 pman
      
128 ptm
      
136 pts
      
150 pwmr
      
153 upc
      
154 kdrv_csc
      
180 usb
      
189 usb_device
      
204 ttyAMA
      
254 rtc
      

      
Block devices:
      
  1 ramdisk
      
259 blkext
      
  8 sd
      
 31 mtdblock
      
 65 sd
      
 66 sd
      
 67 sd
      
 68 sd
      
 69 sd
      
 70 sd
      
 71 sd
      
128 sd
      
129 sd
      
130 sd
      
131 sd
      
132 sd
      
133 sd
      
134 sd
      
135 sd


      3-from dmesg log:



      Console: switching to colour frame buffer device 80x30
      
CLCD: PL110 CLCD hardware, HIE AT-T050QGH-02, VGA Landscape (supports 640x480 @ 24Mhz) display


      4-Device itself has a SDK and display things using that SDK and libs in HTML format.



      5-I have a restricted user on the device and I'm using my own BusyBox v1.20.0.



      My Questions:



      1-Is it possible for me to use device display via Qt without using provided SDK?



      2-How could I access to the display device?



      Any help would be appreciated.



      Thank you very much






      qt embedded-linux display framebuffer




      qt embedded-linux display framebuffer






      share|improve this question









      New contributor




      Vahid Moslemi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question









      New contributor




      Vahid Moslemi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|improve this question




      share|improve this question








      edited 10 hours ago









      Venki WAR

      1,34841228




      1,34841228






      New contributor




      Vahid Moslemi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      asked 19 hours ago









      Vahid Moslemi

      1




      1




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      New contributor





      Vahid Moslemi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






      Vahid Moslemi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





























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