elecrow-7-9 on RB4 not working
I tried alot to get the 8.8 Inch version working (Model DIS79340P) on the raspberry, if i boot into the OS the screen works.
But if i use it with ultibo, a baremetal freepascal distrib it fails. I tried to set alot of values in the config.txt:
Nothing seems to work, does anybody have an idea?
#hdmi_group=2
#hdmi_mode=1
#hdmi_mode=87
#hdmi_cvt 1920 480 60 6 0 0 0
#hdmi_group:0=2
#hdmi_mode:0=1
#hdmi_mode:0=87
#hdmi_cvt 1920 480 60 6 0 0 0
#dtparam=spi=on
#dtparam=i2c_arm=on
#dtoverlay=ads7846,cs=1,penirq=25,penirq_pull=2,speed=50000,keep_vref_on=0,swapxy=0,pmax=255,xohms=150,xmin=200,xmax=3900,ymin=200,ymax=3900
#framebuffer_width=480
#framebuffer_height=1920
#hdmi_cvt:1=1920 480 60
#hdmi_group:1=2
#hdmi_force_mode:1=1
#hdmi_mode:1=87
#hdmi_force_hotplug:1=1
#hdmi_drive:1=2
#hdmi_timings:1=1920 0 48 193 240 480 1 3 2 15 0 0 0 60 0 71750000 0
#hdmi_cvt:0=1920 480 60
#hdmi_group:0=2
#hdmi_force_mode:0=1
#hdmi_mode:0=87
#hdmi_force_hotplug:0=1
#hdmi_drive:0=2
#hdmi_timings:0=1920 0 48 193 240 480 1 3 2 15 0 0 0 60 0 71750000 0
#hdmi_cvt=1920 480 60
#hdmi_group=2
#hdmi_force_mode=1
#hdmi_mode=87
#hdmi_force_hotplug=1
#hdmi_drive=2
#hdmi_timings=1920 0 48 193 240 480 1 3 2 15 0 0 0 60 0 71750000 0
#disable_overscan=1
Comments
I can see a little bit more with these settings:
max_framebuffers=2
hdmi_safe:=0
hdmi_cvt:0=480 1920 60
hdmi_group:0=2
hdmi_mode:0=87
display_rotate=1
But it is not good yet.
That made it work for me:
hdmi_enable_4kp60=1
max_framebuffers=2
hdmi_safe:=0
hdmi_cvt=480 1920 60 6
hdmi_group:0=2
hdmi_mode:0=87
display_rotate:0=1
hdmi_force_hotplug:0=1