Reply To: GPSberry not working on my PI4

[bend94]

Hi

Yes i followed the link

here is the dmesg | grep tty   output

root@raspberrypi:~# dmesg|grep tty
[ 0.000000] Kernel command line: coherent_pool=1M 8250.nr_uarts=1 cma=64M cma=256M video=Composite-1:720×480@60,margin_left=32,margin_right=32,margin_top=32,margin_bottom=32 smsc95xx.macaddr=DC:A6:32:68:5A:AF vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 console=tty1 root=PARTUUID=97709164-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles
[ 0.000260] console [tty1] enabled
[ 0.422050] fe201000.serial: ttyAMA0 at MMIO 0xfe201000 (irq = 34, base_baud = 0) is a PL011 rev2

[ 0.427259] fe215040.serial: ttyS0 at MMIO 0x0 (irq = 36, base_baud = 62500000) is a 16550

 

 

When i display the /dev/serial0 i get some special characters

root@raspberrypi:~# cat /dev/serial0
▒b▒q▒6!v5▒(P.▒*▒.%%
9▒7Ԭ4▒b▒6▒▒.▒.▒3Բ4▒f▒▒2!v1▒,▒.▒(▒,▒,▒,▒*▒.ة4▒b▒
▒▒!▒.▒.▒.▒*▒,▒,▒,▒,▒,▒,Բ4▒f▒ ▒▒%▒.▒*▒.▒.▒,▒,▒,▒,▒,▒,Բ4▒▒▒m▒▒%▒(ج4▒b▒m▒▒%▒(Ъ4▒b▒%.▒.▒(%▒9!T.▒*r▒f▒▒.%▒(▒(,;▒i▒;%!m▒m/▒/▒IP▒(▒▒▒iu▒΢G/▒b▒q▒6!▒!▒(T.▒.▒.!%
9▒7ԫ4▒b▒2▒▒.▒*▒7в4▒b▒▒6!▒!▒(▒.▒(▒(▒,▒,▒.▒.ܲ4▒b▒
▒▒%▒.▒.▒.▒.▒,▒,▒,▒,▒,▒,в4▒b▒

With Minicom that is the same special chars

minicom -b 9600 -o -D /dev/serial0

��!¤*¤. .¤*ì,è,ì,ì,è,ì,Ô²4첪�¦i��%À(Ì-̤.%j1Qªb¦m��!Ä,ÔĪ0ªb¦%. .Ì,)̱/!T.±ªø ܲ¦
��%¤.¤.¤.¤.ì,ì,ì,è,ì,ì,в4첪�¦m��%Ä(Ì)Ĥ.!j1Qªb¦m��%À(ÔԪ4ªb¦%.¤*Ì()̡/!T.µ.øªb°q�6%
��%¤. .¤*¤.ì,ì,ì,ì,ì,ì,Ô²0첪�¦m��!Ä,Ì)Ġ.!jEQªb¦m��%Ä(ÐĪ4ªb¦%.¤.Ì()̑/!T.µªqåªf媴u%6�% .¤*¤. .ì,ì,ì,ì,ì,ì,в4첪�¦m��%Ä(È)Ĥ*%jAQªb¦i��%À(ÔԮ4ªb¦%*¤.Ì()́/!T.µ*qåªb媴

…

 

Please help me

thanks