Arduino Nano fast PC loggger

Arduino IDE

mcp3008 8-channel 10-bit ADC with SPI Interface

<html><body><h3>Introduction</h3>Arduino Nano is reading data over SPI from MCP300 (10-bit ADC), Nano adds the time stamp from Timer1 and it is all sent to PC with 1000000 baud speed (14350 Sampes/sec).Details and source code available here:<a href="https://github.com/TomasGaj/Arduino_Nano_MPC3008_logger/tree/main">https://github.com/TomasGaj/Arduino_Nano_MPC3008_logger/tree/main</a> <figure><img src="https://projects.arduinocontent.cc/ba594522-1476-4836-aa50-480613e1a65c.png"/><figcaption>real experimental setup</figcaption></figure>Note: This code doesn't work with Arduino Uno, I successfully tested it only on Arduino Nano. Although UNO and Nano boards have the same processor, they use different chips for USB communication, check the text below. <h3>How to connect the Arduino Nano board to MCP3008</h3>MCP3008 Atmega328P V_DD 5v V_REF 5v AGND GND CLK D13 D_OUT D12 D_IN D11 CS D10 DGND GND <h3>The structure of the data:</h3>The first two nibbles are time-stamp from the lower byte of Timer1. Timer1 periodically overflows. The prescaler of Timer1 is set to 64, and Timer1 is increased each 4us. The next three nibbles are ADC data values. And on the end of the message are placed carriage return and new line characters. <figure><img src="https://projects.arduinocontent.cc/8a1d451f-5212-498a-9d7f-bf9be871ac77.png"/><figcaption></figcaption></figure> <h3>This code is following two main sources:</h3>I. Youtube tutorials of Anas Kuzechie: <a href="https://www.youtube.com/@AnasKuzechie">https://www.youtube.com/@AnasKuzechie </a>II. fast-MCP3008 library written by Dmitriy L. <a href="https://github.com/arithmechanics/fast-MCP3008">https://github.com/arithmechanics/fast-MCP3008 </a> <h3>About the bug, why the code runs only on Arduino Nano board and not on Arduino Uno boards</h3>It's due to its FTDI chip, the figures below are self-explanatory. After uploading the code into Arduino UNO, you see missing data as in the figure below, after uploading it into Arduino Nano, you'll see a proper record of the sine wave. I didn't investigate more boards, only UNO and NANO boards. When I saw it for the first time I thought it was coming from some interruption running in the background, for example from micros(), so I stuck to the C. Problem remained and then I found this thread, I think it is this issue: <a href="https://forum.arduino.cc/t/uno-atmega16u2-maximum-serial-throughput/893662">https://forum.arduino.cc/t/uno-atmega16u2-maximum-serial-throughput/893662 </a><a href="https://forum.arduino.cc/t/uno-atmega16u2-maximum-serial-throughput/893662"> </a>I think it's due to the buffer overflow in the Atmega chip replacing FTDI, maybe they already fix it in new versions, but I did not investigate it. <figure><img src="https://projects.arduinocontent.cc/d604b139-6bc2-4d42-9618-7fbef613be4f.png"/><figcaption></figcaption></figure> <figure><img src="https://projects.arduinocontent.cc/c38c9355-58b4-4ce4-b8f1-9797b765221c.png"/><figcaption></figcaption></figure> For capturing data on PC I used: <a href="https://coolterm.en.lo4d.com/windows">https://coolterm.en.lo4d.com/windows </a>Enjoy! TG </body></html>

Arduino Nano fast PC loggger

reads data from MCP3008, adds time stamp from Timer 1, and sends to PC with the speed of 1000000 bauds (~14350 Samples/sec).