Week 8
This week was spent around embedded programming
Reading a datasheet
This was my first time reading a datasheet. I wanted to create something cool that would be helpful to me in my final project. I decided I wanted to combine week8 and week9 together in this while using the skills I had learned from the previous 2 weeks to incorporate that into the design overall.
I picked a new chip, the Attiny1614 to use since that is what we have in the kits and in the stock room. I pulled up the spec sheet for the chip and started to analyze how this worked from the different pins. I needed a lot of help from Anthony in deciding what to do with each pin and what each pin would do. I learned a lot about analog vs digital inputs into a pin and the recieving vs sending of a chip. The 1614 documentation is really well made and it is easy to work with in the 2 pin to incorporate it into the board.
The schematic for the 1614 board
Figuring out the TxD and Rxd for the 1614
The input output to detect which pins are good for analog (it is the ~ on 7 and 6)
Making a board
I decided I wanted to make a new board for this week. While it was cool what I did last week with the LED I wanted to do something different for this week with input sensors too. I looked at the different types of inputs and decided to go with the sonar input. This can detect how far a device is from the sensor.
The board I based mine off of
The assembled board I used to start off with
The board I created for this week with the sonar
The schematic for the week with the sonar
The sonar sensors I will put on the board
I created a new schematic in Eagle and used a lot of my learnings from last week to guide my approach in doing this. I started with a similar hello world board to what was refrenced online but used a different chip. I switched from the Attiny412 to the Attiny1614. This was a different chipset than I had used lastweek so I started looking at the documentation for the new microcontroller.
My goal was to create a board that would light up a light if something was within a certain distance away from the sonar input device. I created an LED with a resister to ground and the sonar sensor linked to that.
Cutting the board
I cut the board out and it looks really good. I used the 1/64th and the 1/32nd bit to do so.
The Othermill cutting the board out
The final cut out before soldering
Programming the Board
I installed the Arduino IDE to program on the board. Installing the correct core modules for the ATTiny chips was difficult but I figred out how to do it. I started to write out my program to blink a light based on the distance the sonar sensor detects from the board and light up the light based on it. This allowed me to learn a lot about how to program a board before having to do it a ton for the final project.