First off. This is not in any way a class assignment. This is my own personal work and research. I just want to get that out of the way.
I am learning how to use Matlab with various Arduino projects. I am a seasoned Matlab user but I am fairly new to the entire Arduino space.
I am trying to send some numerical data from Matlab (via a GUI) to my Arduino Uno and have the Arduino write it to my micro SC card. This is a temporary step to my larger project. However, there is no need to go into those specifics as they are outside of the scope of my issues.
I am fairly confident that the Matlab code works and the Arduino code is slightly modified from another project I did where I wrote and read random numbers from my micro SD card.
However, as I run the Matlab code, the Arduino blinks as if it is receiving the data but after I check the micro SD card it remains blank.
I am confident that my Arduino is wired correctly to my micro SD card adapter since this remains the same from my prior project.
Therefore, I am sure I am missing something trivial to get it to work.
I have researched several websites on the subject and their method and mine seem to align very well.
I am fairly certain the problem is in the conditional statement:
if (Serial.available() > 0) {
As you will see.
The Matlab code is below:
arduinoCom = serial('COM3', 'BaudRate', 115200);
sendData = 5;
fopen(arduinoCom);
fprintf(arduinoCom,'%i',sendData); %this will send 5 to the arduino
fclose(arduinoCom);
delete(arduinoCom);
The Arduino code is as follows:
#include <SD.h> // load SD library
int chipSelect = 4; // Chip select pin for the MicroSD Card Adapter
int incomingByte = 0; // for incoming serial data.
File SDF; // Serial data received is saved here.
void setup() {
Serial.begin(115200); // start serial connection to print out debug messages and data
pinMode(chipSelect, OUTPUT); // chip select pin must be set to OUTPUT mode
while (!Serial) {
}
}
void loop() {
// Open file, Write data, Close file only when you receive data
if (Serial.available() > 0) {
incomingByte = Serial.read();
SDF = SD.open("SerialDataFile.txt", FILE_WRITE); // open "SerialDataFile.txt" to write data
SDF.println(incomingByte, DEC); // write ASCII-encoded decimal number to file
SDF.close(); // close file
}
}
The expected result would be a file "SerialDataFile.txt" stored on my micro SD card with the value 5.
Thank you for your help!
