9. OUTPUT DEVICES - WORKING¶
This weeks task was to connect and test an output device to my the microcontroller board that I designed and built in previous assignments.
Group work¶
- This weeks group assignment was to measure the power consumption of an output device. Our groups work was documented here: Output devices- Group assignment
Individual assignment¶
- This week individual assignemt is to connect, test and program an output device with the board I designed in Electronics design week and made in Electronics production week.
Output Device¶
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My final projects design will be using an output screen primarily to display a timer. It would potentially be used for other things, like displaying a menu, but the main use is for displaying a recorded time. So I chose to use an display screen as my output for this assignment.
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I had a couple different options to chose from for my screen, but I decided on using the 0.96 inch OLED IIC Display Module 128x64. I chose this one because I preffered this aspect ratio to the others we had on hand.
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These screens come bare as seen here, without any pins attached. However they also come with 4 male pins that you can solder on if you would rather use pins (instead of soldering directly to the board).
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I preffered to use the male pins in my setup, so the first thing to do was to solder them to the display board.
Connecting Output¶
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These display boards only need 2 data wires, plus a Power (Vcc) and Ground (GND). This display uses IIC (also called I2C) ports for communication. So these are the only ports it can use from the microprocessor. I designed my board with these 4 connectors together with labels
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The only other thing needed to connect the screen to my board was to use 4 wires of M/F jumper wires
Programming¶
Major Setback¶
- problems programming RP2040 to work with output screen… troubleshooting… swapping with ESP32 board instead. (heavy documentation)
Working Program¶
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installing libraries
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basic program, test working screen
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modified program. get timer working
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modified program. work with button press.
