i have a Rock 5A v1.1 running
rock-5a_debian_bullseye_cli_b18, and have enabled i2c on pins 3/5 (I2C2_M4) using the
rsetup tool. then i try to probe the i2c line by running
sudo i2cdetect 2 and connecting an oscilloscope to pin 3 (I2C2_SCL_M4). the oscilloscope does not show any signal at all.
I’ve also tried I2C8_M2 and UART2_M0 (using
sudo minicom -D /dev/ttyS2 -b 9600 to write to the pin 8 TX line), but there as well: no signal measured with an oscilloscope.
am i missing some setup steps? is my device defective?
interestingly when i run the
view overlay info tool in
rsetup it says that I2C2_M4 is on pins 21/19 which would be correct for the newer board revision V1.2 and not my V1.1. anyways, no clock signal on those pins either.