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avishorp / TM1637

Arduino library for TM1637 (LED Driver)
GNU Lesser General Public License v3.0
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MKR1010 pinMode INPUT doesn't work #63

Closed szaiftamas closed 3 years ago

szaiftamas commented 4 years ago

I tried this library, but doesn't work with MKR1010. I use the pin A3 and A4 to CLK and DIO, and the display module include 10K pull up resistor and 100p capacitor on both channel. I verified the CLK and DIO with oscilloscope, and it is not able to pull up to Vcc in this speed. I have two choice, one of them to decrease the speed or change the pinMode to digitalWrite. The digitalWrite solved our problem.

avishorp commented 4 years ago

You shouldn't change the pinMode to digitalWrite, because this line can be driven by the display and it must be 3-state. You can either make the bit delay longer and/or add a 4.7k resistor in parallel to the existing one (from VCC to the pin).