xujianningkp 0 Posted June 20, 2014 Share Posted June 20, 2014 Hi all, I'm trying to make a communication between TM4C129 Connected Launchpad and TM4C123 Launchpad (or Arduino UNO) via I2C ports. 1.5K pull-up resisters are added to both SCL and SDA. Connected both grounds. I have the salver_sender example code loaded to the Connect Launchpad and the master_reader example code to Arduino UNO. The Arduino UNO got some weird characters yyyyyy from the Connect Launchpad and the loop stuck on Wire.requestForm() every time. Arduino gets these yyyyyy only if I pushed the reset button on the Connected Launchpad or disconnect the SCL and SDA to make the loop run continuously (but no data is sending). I changed the setModule(); to different I2C ports but they all did the same. I tried the TM4C123 Launchpad (instead of the Connected Launchpad) with and Arduino with the same setup and codes, they works perfectly without any issue. Please help me out if you have any idea or info. I appreciate your time Result from TM4C129 Connected Launchpad and Arduino: send request.......request sent! Quote Link to post Share on other sites
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