Week 4

Embedded programing. Have you:

Individual assignment: browse through the data sheet for your microcontroller, write program for a microcontroller development board to interact (with local input &/or output) and communicate (remotely) extra credit: use different languages &/or development environments extra credit: connect external components to the board

Group assignment: compare the performance and development workflows for other architectures

============================= Group Assignment =======================================

If we want to use more powerful boards, the microprocessor board it's an interesting option because a lot of features are more powerful than microcontrollers. We test two boards, the first was Ndivia Jetson Nano and the last was Raspberry Pi board

============================ Individual Assignment ====================================

1. Documented what you learned from reading a microcontroller datasheet.
2. What questions do you have? What would you like to learn more about?
3. Programmed your board
4. Described the programming process/es you used
5. Included your code

Documented what you learned from reading a microcontroller datasheet.

I found very interesting the pin classification, the ATTiny 44 have two groups, the first one is the A port and the second the B port, this is very important to have programs because We need to send the program to A pin Group or B pin Group

Also it's very interesting the minimal connections that We need, for instance:

1. Pin 14 to Ground. Pin 1 to Energy. These Pins are reserved
2. Also the PA4,PB3,PA5,PA6, pins are reserved

Important Information

1. TWI(I2C): 1
2. ADC Channels: 8
3. ADC Resolution (bits): 10
4. ADC Spped(ksps): 15
5. ADC Gain Stage: yes
6. Analog Comparators: 1
7. Temp.Sensor: Yes
8. SRAM (kBytes): 0.25
9. EEPROM (Bytes): 256
10. ASelf Program Memory: Yes
11. Temp. Range (degC): -40to85
12. I/O Supply Class: 1.8 to 5.5
13. OPerating Voltage(Vcc): 1.8 to 5.5
14. Flash(kBytes): 4 kBytes
15. Pin Count: 14
16. Max. OPerating Freq.(MHz): 20 MHz
17. CPU: 8-bit AVR
18. #of Touch Channels: 6
19. Max I/O Pins: 12
20. Ext Interrupts: 12
21. SPI: 1
22. Timers: 2
23. PWM Channels: 1
24. Calibrated RC Oscillator: Yes
25. Debug Interface: debugWIRE

These means We only have 8 pins to create the board

Programmed your board

Described the programming process/es you used

Atmel Studio IDE with C ---------------------------------------------------------------------------------------------------------

The first step is install Atmel Studio, click in the link below:

The Installation consists in the following steps:

1. Install AtmelStudio IDE.

2. Choose the GCC Executable Project, and put a project name

3. Choose the Attiny 44 from the list, We can choose other options like AtMega328 or Attiny 45

4. We need to understand the code, here an example.

5. The Final code have two pines, the first one for button and the second to destinate to LED

6. To Upload the code we need to configured an External tool called USBTiny, We need to install avrdude.exe


Hello Board-Jose Reategui from JOSE LUIS REATEGUI on Vimeo.

Nvidia Jetson Nano ---------------------------------------------------------------------------------------------------------

To work with Nvidia Jetson Nano we have to use a JestonGPIO library, this library is like Raspberry GPIO library

To work with Nvidia Jetson nano I decided to use Visual Studio Code as an Editor. In this way, I looked for visual studio code web page

Is compulsory download the correct version related with our Jetson CPU, in my case is arm64 debian version.

To install Visual Studio Code(VS Code), I choose command line ("crtl"+"alt"+"t") and I left to download folder and I typed the command: (sudo apt install ./code_1.75.1-1675892106_arm64.deb).

We can check if the installation process finish well with the Applications menu: We have to observe the VS Code icon

I decided to use Dark theme in VS Code.

now is time to install Python extension from Extension button in the left side, under debug button

once ubicated the python extension we have to push on the "install" blue button

Another very useful extension is JupyterLab into Visual Studio Code. In this way I wrote in the terminal: "pip3 install JupyterLab"

To work with Jupyter is necessary write in the extension bar, and pick on "Create: New Jupyter Notebook".

Jupyter Lab work with code cells, here we can put on our python code.

When I tried to run my "hello world" code, the system shows an error related with the kernel, to solve this issue I changed "Python 3.9.16" for "Python 3.6.9"

After the python kernel change the script cells works very well.

I decided install "sklearn" "numpy" and "matplotlib" beacuse I'm going to use machine learning techniques in my final project.

previously I installed Pytorch, it means that I can import the library and use it

To use the Jetson's pins I tried to use RPi. GPIO like a Raspberry-pi-4, in this way I used the command: "sudo pip install RPi.GPIO"

The RPi._GPIO doesn't work. Is necessary install the Jetson GIP library

After the Jetson GPIO installation process. I could use "import Jetson.GPIO as GPIO"

STM32 with STM32CubeIDE--------------------------------------------------------------------------------------------------

STM32 Cube IDE is a IDE to work with STM32 boards, has a several interactive tools such as windows to choose board features, pines

STM32CubeIDE web page

Go to OS compatibility driver to install the IDE

After following the installation process and open the IDE

We have to choose a workspace and go to File menu, "new", "create a New STM32 project"

In the "target selection menu" we can start with MCU/MPU selector

But is more confortable for me work with the "board selector" in the next label, because we can select specific board with the "commercial part" or "mounted device".

After the last step we have to select the "example selector"

Now is time to select the available pinout funcionalities in order to reduce the programming time in the code

once the last step finished we have to configure the pinout behavior (lines 96,97,98)

We have to custom the debug configuration before the run code process

once finish the debug configuration we have to push on click button

This video shows the blink led program with a STM32 board based on ARM