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CCS/TM4C123GH6PM: Help With DTH11

Part Number: TM4C123GH6PM

Tool/software: Code Composer Studio

Hi,

I'm trying to setup the connection between my TM4C123GH6PM LaunchPad and DHT11 temperature sensor using CCS. I'm done sending Start signal from my board yet struggling in the receiving phase since I always got returned  a high level pulse when it was supposed to be an 80us low pulse followed by an 80us high pulse. My code is based on the library given by the sensor's manufacturer: https://github.com/adafruit/DHT-sensor-library. The info about the changing pulses is included below. Please help and thank you for your time !AM2302.pdf