![]() Perhaps a better idea is to put a Mega proto shield between the two in order to divert the wiring. No amount of code will fix that and it makes getting a display that will work with a Mega start looking like a good idea. IF your LCD does not have that pin cluster AND does not have connection to pins 22>54 then you have a shield specifically made not to work with a Meg. I understand that on the latest versions of IDE, even that is not necessary.įurther to this, the Ethernet shield has connection to the six-pin ICSP cluster and may pick up SPI therefrom when used with Mega. This is what happens when you use the SD on an Ethernet shied and swap from Uno to Mega. I am not familiar with your display/SD and I don't understand how it connects to a Mega but, since it works on a Uno, I would imagine that all you need to do to the CODE is call 53 as output for the Mega, as clearly indicated in the example, nothing else. You need to know which pin is used for select. You are not using it and have no equivalent. You said yes but there is no evidence of that. I specifically asked you if you had declared pin 53 as output. read from the file until there's nothing else in it: Serial.println("error opening test.txt") if the file didn't open, print an error: MyFile = SD.open("test.txt", FILE_WRITE) so you have to close this one before opening another. note that only one file can be open at a time, Serial.println("initialization failed!") Open serial communications and wait for port to open: This example code is in the public domain. Everything indicated they were 100 compatible. I bought the Elegoo mega2560 starter kit and the Elegoo 2.8 in TFT touchscreen from Amazon specifically to use together and have access to the SD card slot. * SD card attached to SPI bus as follows: I will start by saying I am 100 new to arduino’s. This example shows how to read and write data to and from an SD card file If (!card.Here is my code if I did any wrong in it causing no card detect message to show up, please let me know if any mistake you found in it! /* since we're just testing if the card is working! we'll use the initialization code from the utility libraries I made this, becaus it’s mentioned in severals forums, but it didn’t workt wiht it and whitout it // change this to 53 on a mega Be carreful : You have to change the value of the variable CS-pin. ![]() After, I follow this tutorial, using the standard SD library : Tutorial 11 for Arduino: SD Cards and Datalogging. There are four pins opposite to the display pins, as shown in figure below. I done this drawing on Fritzing, maybe it will help some people like me in the future : SD-CARD-Mega catsur Flickr. Follow the next steps to display an image on the display: 1) Solder header pins for the SD card. To read from the SD card you use the SD library, already included in the Arduino IDE software. SPI.begin(chipSelect) //habe ich eingeführt, da es in einigen Foren erwähnt wird, funktioniert jedoch mit und ohne nicht. The 1.8 TFT display can load images from the SD card. PinMode(chipSelect, OUTPUT) // change this to 53 on a mega or the SD library functions will not work. (10 on most Arduino boards, 53 on the Mega) must be left as an output Note that even if it's not used as the CS pin, the hardware SS pin Adafruit SD shields and modules: pin 10 change this to match your SD shield or module set up variables using the SD utility library functions: Pin 4 used here for consistency with other Arduino examples ** CS - depends on your SD card shield or module. ** CLK - pin 13 on Arduino Uno/Duemilanove/Diecimila ** MISO - pin 12 on Arduino Uno/Duemilanove/Diecimila ** MOSI - pin 11 on Arduino Uno/Duemilanove/Diecimila * SD card attached to SPI bus as follows: Very useful for testing a card when you're not sure whether its working or not. ![]() SD library is based in order to get info about your SD card. This example shows how use the utility libraries on which the' Also, the proposed solutions never worked. For proper communication of the microcontroller with peripheral devices, it is necessary to address the corresponding pins via bus. ![]() I have invested several hours and tens of forums read this but found nothing comparable. Is the problem in the program code or is it a hardware problem? If it is a software problem, could send me a test program that is designed for Arduino Due. The test program I used is a test-program on the Arduino website for SD cards (Program in the end of the mail, changes marked in bold). I have the same also tried adding I use ICSP instead of SPI, which the Arduinowebsite propose. The CS-output I wired on to pin 4, 10 or 52 (each one once tested), without success. The three SD ports I wired correctly to the SPI. However, the Arduino don’t detect the SD card (I've tried two different and also reformatted both). For this I use a 3.2 'display of ITead with integrated SD slot ( ). I have a Arduino Due and want save data to an SD card.
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