Sd card module
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SD Kortelės modulis skirtas dirbti su įvairiais mikrovaldikliais. Jį galima pigiai nusipirkti čia.
Pajungimas prie ESP32[keisti]
Naudosim SPI2 interface, paliekam pirmajį laisvą, gal reikės pajungti daugiau įrengimų, pajungimo schema būtų tokia:
- ESP32 PIN 16 -> SD Card CS
- ESP32 PIN 14 -> SD Card SCK
- ESP32 PIN 13 -> SD Card MOSI
- ESP32 PIN 5 -> SD Card MISO
Kodo pavyzdys būtų toks:
#include <SPI.h>
#include <SD.h>
#define SD_CS_PIN 16
// These pins will be use for SPI2
#define SD_SCK_PIN 14
#define SD_MOSI_PIN 13
#define SD_MISO_PIN 5
SPIClass SPI2(HSPI);
void listDir(fs::FS &fs, const char * dirname, uint8_t levels)
{
Serial.printf("Listing directory: %s\n", dirname);
File root = fs.open(dirname);
if (!root)
{
Serial.println("Failed to open directory");
return;
}
if (!root.isDirectory())
{
Serial.println("Not a directory");
return;
}
File file = root.openNextFile();
while (file)
{
if (file.isDirectory())
{
Serial.print(" DIR : ");
Serial.println(file.name());
if (levels)
{
listDir(fs, file.path(), levels - 1);
}
}
else
{
Serial.print(" FILE: ");
Serial.print(file.name());
Serial.print(" SIZE: ");
Serial.println(file.size());
}
file = root.openNextFile();
}
}
void createDir(fs::FS &fs, const char * path)
{
Serial.printf("Creating Dir: %s\n", path);
if (fs.mkdir(path))
{
Serial.println("Dir created");
}
else
{
Serial.println("mkdir failed");
}
}
void removeDir(fs::FS &fs, const char * path)
{
Serial.printf("Removing Dir: %s\n", path);
if (fs.rmdir(path))
{
Serial.println("Dir removed");
}
else
{
Serial.println("rmdir failed");
}
}
void readFile(fs::FS &fs, const char * path)
{
Serial.printf("Reading file: %s\n", path);
File file = fs.open(path);
if (!file)
{
Serial.println("Failed to open file for reading");
return;
}
Serial.print("Read from file: ");
while (file.available())
{
Serial.write(file.read());
}
file.close();
}
void writeFile(fs::FS &fs, const char * path, const char * message)
{
Serial.printf("Writing file: %s\n", path);
File file = fs.open(path, FILE_WRITE);
if (!file)
{
Serial.println("Failed to open file for writing");
return;
}
if (file.print(message))
{
Serial.println("File written");
}
else
{
Serial.println("Write failed");
}
file.close();
}
void appendFile(fs::FS &fs, const char * path, const char * message)
{
Serial.printf("Appending to file: %s\n", path);
File file = fs.open(path, FILE_APPEND);
if (!file)
{
Serial.println("Failed to open file for appending");
return;
}
if (file.print(message))
{
Serial.println("Message appended");
}
else
{
Serial.println("Append failed");
}
file.close();
}
void renameFile(fs::FS &fs, const char * path1, const char * path2)
{
Serial.printf("Renaming file %s to %s\n", path1, path2);
if (fs.rename(path1, path2))
{
Serial.println("File renamed");
}
else
{
Serial.println("Rename failed");
}
}
void deleteFile(fs::FS &fs, const char * path)
{
Serial.printf("Deleting file: %s\n", path);
if (fs.remove(path))
{
Serial.println("File deleted");
}
else
{
Serial.println("Delete failed");
}
}
void testFileIO(fs::FS &fs, const char * path)
{
File file = fs.open(path);
static uint8_t buf[512];
size_t len = 0;
uint32_t start = millis();
uint32_t end = start;
if (file)
{
len = file.size();
size_t flen = len;
start = millis();
while (len)
{
size_t toRead = len;
if (toRead > 512)
{
toRead = 512;
}
file.read(buf, toRead);
len -= toRead;
}
end = millis() - start;
Serial.printf("%u bytes read for %u ms\n", flen, end);
file.close();
}
else
{
Serial.println("Failed to open file for reading");
}
file = fs.open(path, FILE_WRITE);
if (!file)
{
Serial.println("Failed to open file for writing");
return;
}
size_t i;
start = millis();
for (i = 0; i < 2048; i++)
{
file.write(buf, 512);
}
end = millis() - start;
Serial.printf("%u bytes written for %u ms\n", 2048 * 512, end);
file.close();
}
SPIClass SPISD(HSPI);
void setup()
{
Serial.begin(115200);
while (!Serial && millis() < 5000);
//Serial.print(F("\nStart ESP32_SD_SPI2_FileTest on ")); Serial.println(ARDUINO_BOARD);
Serial.println(F("Current SPI pinout:"));
Serial.print(F("SD_MOSI_PIN:")); Serial.println(SD_MOSI_PIN);
Serial.print(F("SD_MISO_PIN:")); Serial.println(SD_MISO_PIN);
Serial.print(F("SD_CLK_PIN:")); Serial.println(SD_SCK_PIN);
Serial.print(F("SD_CS_PIN:")); Serial.println(SD_CS_PIN);
Serial.println("Serial communication started.");
SPISD.begin(SD_SCK_PIN, SD_MISO_PIN, SD_MOSI_PIN);
if (!SD.begin(SD_CS_PIN, SPISD))
{
Serial.println("Card Mount Failed");
return;
}
uint8_t cardType = SD.cardType();
if (cardType == CARD_NONE)
{
Serial.println("No SD card attached");
return;
}
Serial.print("SD Card Type: ");
if (cardType == CARD_MMC)
{
Serial.println("MMC");
}
else if (cardType == CARD_SD)
{
Serial.println("SDSC");
}
else if (cardType == CARD_SDHC)
{
Serial.println("SDHC");
}
else
{
Serial.println("UNKNOWN");
}
uint64_t cardSize = SD.cardSize() / (1024 * 1024);
Serial.printf("SD Card Size: %lluMB\n", cardSize);
listDir(SD, "/", 0);
createDir(SD, "/mydir");
listDir(SD, "/", 0);
removeDir(SD, "/mydir");
listDir(SD, "/", 2);
writeFile(SD, "/hello.txt", "Hello ");
appendFile(SD, "/hello.txt", "World!\n");
readFile(SD, "/hello.txt");
deleteFile(SD, "/foo.txt");
renameFile(SD, "/hello.txt", "/foo.txt");
readFile(SD, "/foo.txt");
testFileIO(SD, "/test.txt");
Serial.printf("Total space: %lluMB\n", SD.totalBytes() / (1024 * 1024));
Serial.printf("Used space: %lluMB\n", SD.usedBytes() / (1024 * 1024));
}
void loop()
{
// put your main code here, to run repeatedly:
delay(1000);
}
Pavyzdys paprastas, nuskaitoma SD korta, jos direktorijos, parašoma informacija, pratestuojama ar išeina sukurti failus ir t.t.