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1

The Pi does not support multi-master mode. There is no requirement for the I2C clock to be a square wave.


0

No. The information is held internally within the DMA blocks but there is no method to get that information.


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The JP command jumps on greater than or equal to zero. It's of no use in checking a GPIO level as 0 and 1 are treated the same. Change JP to JNZ.


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I will assume you are using the pigpio Python module. You are correct to say that hardware_PWM can not be used at the same time as wave_chain. I suggest you use the set_servo_pulsewidth method instead. This method can be used at the same time as wave_chain and is stable enough for servo operation.


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