Hi:
I'm trying to learn how to get data from the Arduino UNO to a data logger circuit that I bought from catalex.taobao.com. In my case, I want it to store the temperature data on a Micro SD card. The circuit has 6 inputs on it. They are CS, SCK, MOSI, MISO, VCC, and GND. I somewhat understand all the circuit input functions except the CS. I've gotten the definitions of the others from discussions of data logging in this forum. The only thing that I can imagine for the CS is that it is the data to be logged. Can someone direct me to a more complete discussion of the data logging mechanics or explain the CS input to me. Thanks much. I'm using a TMP 36 temperature sensor for my input to the UNO. I hope that you can help.
Bob
CS stands for Chip Select.
This pin becomes important when you have multiple devices on a SPI bus. This way, the master can choose which slave to talk to by sending logic HIGH to the CS of the one slave in question and logic LOW to all of the others.
It works like an enable pin.
You will need the appropriate code library to create files, write data to and perform other operations on the SD card. That will take care of CS, etc.
For informed help, post a link to the product page for the logger.
On an Arduino you must use the correct pins for Mosi, Miso and SCK. On an Uno they are 11, 12 and 13. but you can use any pin for CS and, if you have more than one SPI device each must have a separate CS pin.
...R
And 10 must be an Output for the Arduino to be SPI master, whether you are using it as a CS pin or not.