Reply To: Problem with Pi3B and Bullseye

[JonM]

I moved the BerryIMU-GPS to an older RPi2.. (running Raspian 8 – Jessie, with up to date firmware)

$ stty -F /dev/ttyAMA0
speed 9600 baud; line = 0;
-brkint -imaxbel

dmesg

3f201000.serial: ttyAMA0 at MMIO 0x3f201000 (irq = 114, base_baud = 0) is a PL011 rev2

and if I cat the serial port, I get the following:

Does any of this make sense:

$GNRMC,001817.00,V,,,,,,,030522,,,N*6A

$GNVTG,,,,,,,,,N*2E

$GNGGA,001817.00,,,,,0,00,99.99,,,,,,*77

$GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E

$GNTXT,01,01,01,NMEA unknown msg*46

$GNTXT,01,01,01,NMEA unknown msg*46

$GNTXT,01,01,01,NMEA unknown msg*46

$GNTXT,01,01,01,NMEA unknown msg*46

$GNTXT,01,01,01,NMEA unknown msg*46

$GNTXT,01,01,01,NMEA unknown msg*46

$GNTXT,01,01,01,NMEA unknown msg*46

$GNTXT,01,01,01,NMEA unknown msg*46

$GNTXT,01,01,01,NMEA unknown msg*46

$GNTXT,01,01,00,txbuf alloc*61

$GNTXT,01,01,01,NMEA unknown msg*46

$GNTXT,01,01,01,NMEA unknown msg*46

$GNTXT,01,01,01,NMEA unknown msg*46

When moved back to the Pi3, dmesg:

3f215040.serial: ttyS0 at MMIO 0x3f215040 (irq = 71, base_baud = 50000000) is a 16550

$ stty -F /dev/serial0
speed 9600 baud; line = 0;
-brkint -imaxbel

and if I cat the port, I get garbage…

$ cat /dev/serial0
�b\(‘j
3�
�;pնn�Nb��� �\
t���J#Xq�b5�(‘j
-w�� �
$�’
#7� $”�0 “3=��!+E2 ^ٵb(‘j
�HUX��’?�� n
�b(‘j
^B��T���b(‘j
���� X?��b (‘j
����)��ba(‘j

 

I need to find some wires to try a loopback test