Interfacing (DSI, CSI, I2C, etc.) • UART2 and CM4

Hello. I am trying to use UART2. First I enabled UART2 in the config.txt
dtoverlay=uart2

After rebooting, serial device was added:
/dev/ttyAMA2

But nothing comes out from the TX pin.
raspi-gpio funcs says that GPIO0 is SDA0 and TXD2. According to documentation, SDA0 is CM4 module pin 82. But... wait... CM4 datasheet says that GPIO0 is ID_SD on pin 36. In deed... by toggling GPIO44 the pin 82 reacts...
Thanks "raspi-gpio func" for ruining my new PCB

Statistics: Posted by gotaf80307 — Thu Mar 14, 2024 8:38 pm — Replies 0 — Views 10

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