Problems with SDO on MCP3464 about arduino_mcp3x6x_library HOT 3 CLOSED

hey @Omikron90
please be aware this is a very early stage of a library, and not functional at all!

I do not own a MCP346x, but according the datasheet it should behave similar to my MCP3564.

2 ideas what could be he problem (because I struggeled there as well)

**chapter 6.2.4**
Changing the command type within the same communication (while CS is
logic low) is not possible. The communication has to be
stopped (CS rising edge) and restarted (CS falling
edge) to change its command type. The list of possible
commands, their type and their possible command
addresses are described in Table 6-2

so check if CS toggles on every command written.

depending on the clk_sel you must assemble a pullup on mclk.

from arduino_mcp3x6x_library.

hey @nerdyscout
thanks for the two ideas, especially the pullup on MCLK has brought me further. Now I can write and read the registers :-)

Yes, the MCP346x is for the most part the same as the MCP356x. I should have considered however actually also all changes when writing the registers.

Unfortunately the ADC still does not return any values when I read the register 0x0 (ADCDATA). Did you also have problems with this?

from arduino_mcp3x6x_library.

default it expects a external clk of 4.9152Mhz used for ADC sampling. but you could configure an internal clk. that should help.

from arduino_mcp3x6x_library.