Hôm nay mình giới thiệu SD Card cho Arduino STM32H7
Sơ đồ nối dây như sau
Chân số 1 GND Nối GND STM32H7
Chân số 2 VCC Nối 5V STM32H7
Chân số 3 MISO Nối PA6 STM32H7
Chân số 4 MOSI Nối PA7 STM32H7
Chân số 5 SCK Nối PA5 STM32H7
Chân số 6 CS Nối PA4 STM32H7
Chọn BOARD Như sau :
Chương trình Arduino STM32H7
#include <SPI.h>
#include <SD.h>
#define SS PA4
//MOSI PA7
//MISO PA6
//SCK PA5
//CS PA4
File myFile;
void setup() {
pinMode(SS, OUTPUT);
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.print("Initializing SD card");
if (!SD.begin(SS)) {
Serial.println("initialization failed!");
return;
}
Serial.println("initialization done.");
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
myFile = SD.open("test.txt", FILE_WRITE);
// if the file opened okay, write to it:
if (myFile) {
Serial.print("Writing to test.txt…");
myFile.println("testing 121345566.");
// close the file:
myFile.close();
Serial.println("done.");
} else {
// if the file didn’t open, print an error:
Serial.println("error opening test.txt");
}
// re-open the file for reading:
myFile = SD.open("test.txt");
if (myFile) {
Serial.println("test.txt:");
// read from the file until there’s nothing else in it:
while (myFile.available()) {
Serial.write(myFile.read());
}
// close the file:
myFile.close();
} else {
// if the file didn’t open, print an error:
Serial.println("error opening test.txt");
}
}
void loop() {
// nothing happens after setup
}
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