How, exactly, does the meter function work? I soldered the jumper and connected power. I used 2 10K resistors to hold the SD0 and SDI pins high. I connected switches to pull the pins low. However, it does not work as expected. After pressing the buttons quickley and randomly, I got it to display random stuff (000 ) (0F00) ( ). So obviously I am doing something wrong.
EDIT
It seems that SPI will work, if I used it correctly. I have my UNO talking to it via TTL Serial. It is counting from 0001 through 9999 and resets. But the “Counter” function is not working as described:
The counter function simply counts up or down, incrementing when you pull down SDO and decrementing when you pull down SDI.