Well, the case is not quite closed:
I now realize that RPi decided to reassign my ports.
With one mux 0x70, ports were assigned 22-29
With two ports, it decided to give 0x70 30-37 and move move the 0x77's ports to 22-29... I'm not sure, if this is random or not, or if it follows any type of logic. Note that I define the overlays starting with 0x70 followed by 0x77. So it seems to assign them in reverse order.
No idea what bus 20 and 21 are assigned to.
But I'd rather ASSIGN a starting port number per MUX address, say:
MUX 0x70 gets ports 30-37
MUX 0x77 gets ports 40-47
Any way to achieve that, please?
I now realize that RPi decided to reassign my ports.
With one mux 0x70, ports were assigned 22-29
With two ports, it decided to give 0x70 30-37 and move move the 0x77's ports to 22-29... I'm not sure, if this is random or not, or if it follows any type of logic. Note that I define the overlays starting with 0x70 followed by 0x77. So it seems to assign them in reverse order.
Code:
Helios@HeliosRPi4:~ $ i2cdetect -li2c-1 i2c bcm2835 (i2c@7e804000) I2C adapteri2c-20 i2c fef04500.i2c I2C adapteri2c-21 i2c fef09500.i2c I2C adapteri2c-22 i2c i2c-1-mux (chan_id 0) I2C adapteri2c-23 i2c i2c-1-mux (chan_id 1) I2C adapteri2c-24 i2c i2c-1-mux (chan_id 2) I2C adapteri2c-25 i2c i2c-1-mux (chan_id 3) I2C adapteri2c-26 i2c i2c-1-mux (chan_id 4) I2C adapteri2c-27 i2c i2c-1-mux (chan_id 5) I2C adapteri2c-28 i2c i2c-1-mux (chan_id 6) I2C adapteri2c-29 i2c i2c-1-mux (chan_id 7) I2C adapteri2c-30 i2c i2c-1-mux (chan_id 0) I2C adapteri2c-31 i2c i2c-1-mux (chan_id 1) I2C adapteri2c-32 i2c i2c-1-mux (chan_id 2) I2C adapteri2c-33 i2c i2c-1-mux (chan_id 3) I2C adapteri2c-34 i2c i2c-1-mux (chan_id 4) I2C adapteri2c-35 i2c i2c-1-mux (chan_id 5) I2C adapteri2c-36 i2c i2c-1-mux (chan_id 6) I2C adapteri2c-37 i2c i2c-1-mux (chan_id 7) I2C adapterBut I'd rather ASSIGN a starting port number per MUX address, say:
MUX 0x70 gets ports 30-37
MUX 0x77 gets ports 40-47
Any way to achieve that, please?
Statistics: Posted by TriLife — Wed Mar 13, 2024 7:58 pm