In this library clock seems to be unstable.
Consequences:
data from Arduino: W55 WFF R00 R22 RFF RDD
data from scope: WAA WFF R00 R00 R7F RCC
data from logic analyzer : WAA WFF R80 R11 R7F REE
Data from Arduino are the real data sent and read.
With the scope, I can see that clock pulses have different width, an are too short. They should be at least 50% duty cycle. Only read data are wrong.
In this library clock seems to be unstable. Consequences: data from Arduino: W55 WFF R00 R22 RFF RDD data from scope: WAA WFF R00 R00 R7F RCC data from logic analyzer : WAA WFF R80 R11 R7F REE
Data from Arduino are the real data sent and read. With the scope, I can see that clock pulses have different width, an are too short. They should be at least 50% duty cycle. Only read data are wrong.