![\"\"](\"https:\/\/blog.eldhrimnir.com\/wp-content\/uploads\/2017\/03\/52f5be27636826c10b1102844b928434-271x300.png\")
<\/a><\/p>\n\u25a0\u4f7f\u7528\u3059\u308b\u30b3\u30fc\u30c9(SDMMC_Test)<\/p>\n
[cpp]<\/p>\n
\/*
\n* Connect the SD card to the following pins:
\n*
\n* SD Card | ESP32
\n* D2 12
\n* D3 13
\n* CMD 15
\n* VSS GND
\n* VDD 3.3V
\n* CLK 14
\n* VSS GND
\n* D0 2 (add 1K pull up after flashing)
\n* D1 4
\n*\/<\/p>\n
#include "FS.h"
\n#include "SD_MMC.h"<\/p>\n
void listDir(fs::FS &fs, const char * dirname, uint8_t levels){
\nSerial.printf("Listing directory: %s\\n", dirname);<\/p>\n
File root = fs.open(dirname);
\nif(!root){
\nSerial.println("Failed to open directory");
\nreturn;
\n}
\nif(!root.isDirectory()){
\nSerial.println("Not a directory");
\nreturn;
\n}<\/p>\n
File file = root.openNextFile();
\nwhile(file){
\nif(file.isDirectory()){
\nSerial.print(" DIR : ");
\nSerial.println(file.name());
\nif(levels){
\nlistDir(fs, file.name(), levels -1);
\n}
\n} else {
\nSerial.print(" FILE: ");
\nSerial.print(file.name());
\nSerial.print(" SIZE: ");
\nSerial.println(file.size());
\n}
\nfile = root.openNextFile();
\n}
\n}<\/p>\n
void createDir(fs::FS &fs, const char * path){
\nSerial.printf("Creating Dir: %s\\n", path);
\nif(fs.mkdir(path)){
\nSerial.println("Dir created");
\n} else {
\nSerial.println("mkdir failed");
\n}
\n}<\/p>\n
void removeDir(fs::FS &fs, const char * path){
\nSerial.printf("Removing Dir: %s\\n", path);
\nif(fs.rmdir(path)){
\nSerial.println("Dir removed");
\n} else {
\nSerial.println("rmdir failed");
\n}
\n}<\/p>\n
void readFile(fs::FS &fs, const char * path){
\nSerial.printf("Reading file: %s\\n", path);<\/p>\n
File file = fs.open(path);
\nif(!file){
\nSerial.println("Failed to open file for reading");
\nreturn;
\n}<\/p>\n
Serial.print("Read from file: ");
\nwhile(file.available()){
\nSerial.write(file.read());
\n}
\n}<\/p>\n
void writeFile(fs::FS &fs, const char * path, const char * message){
\nSerial.printf("Writing file: %s\\n", path);<\/p>\n
File file = fs.open(path, FILE_WRITE);
\nif(!file){
\nSerial.println("Failed to open file for writing");
\nreturn;
\n}
\nif(file.print(message)){
\nSerial.println("File written");
\n} else {
\nSerial.println("Write failed");
\n}
\n}<\/p>\n
void appendFile(fs::FS &fs, const char * path, const char * message){
\nSerial.printf("Appending to file: %s\\n", path);<\/p>\n
File file = fs.open(path, FILE_APPEND);
\nif(!file){
\nSerial.println("Failed to open file for appending");
\nreturn;
\n}
\nif(file.print(message)){
\nSerial.println("Message appended");
\n} else {
\nSerial.println("Append failed");
\n}
\n}<\/p>\n
void renameFile(fs::FS &fs, const char * path1, const char * path2){
\nSerial.printf("Renaming file %s to %s\\n", path1, path2);
\nif (fs.rename(path1, path2)) {
\nSerial.println("File renamed");
\n} else {
\nSerial.println("Rename failed");
\n}
\n}<\/p>\n
void deleteFile(fs::FS &fs, const char * path){
\nSerial.printf("Deleting file: %s\\n", path);
\nif(fs.remove(path)){
\nSerial.println("File deleted");
\n} else {
\nSerial.println("Delete failed");
\n}
\n}<\/p>\n
void testFileIO(fs::FS &fs, const char * path){
\nFile file = fs.open(path);
\nstatic uint8_t buf[512];
\nsize_t len = 0;
\nuint32_t start = millis();
\nuint32_t end = start;
\nif(file){
\nlen = file.size();
\nsize_t flen = len;
\nstart = millis();
\nwhile(len){
\nsize_t toRead = len;
\nif(toRead > 512){
\ntoRead = 512;
\n}
\nfile.read(buf, toRead);
\nlen -= toRead;
\n}
\nend = millis() – start;
\nSerial.printf("%u bytes read for %u ms\\n", flen, end);
\nfile.close();
\n} else {
\nSerial.println("Failed to open file for reading");
\n}
\nfile = fs.open(path, FILE_WRITE);
\nif(!file){
\nSerial.println("Failed to open file for writing");
\nreturn;
\n}<\/p>\n
size_t i;
\nstart = millis();
\nfor(i=0; i<2048; i++){
\nfile.write(buf, 512);
\n}
\nend = millis() – start;
\nSerial.printf("%u bytes written for %u ms\\n", 2048 * 512, end);
\nfile.close();
\n}<\/p>\n
void setup(){
\nSerial.begin(115200);
\nif(!SD_MMC.begin()){
\nSerial.println("Card Mount Failed");
\nreturn;
\n}
\nuint8_t cardType = SD_MMC.cardType();<\/p>\n
if(cardType == CARD_NONE){
\nSerial.println("No SD_MMC card attached");
\nreturn;
\n}<\/p>\n
Serial.print("SD_MMC Card Type: ");
\nif(cardType == CARD_MMC){
\nSerial.println("MMC");
\n} else if(cardType == CARD_SD){
\nSerial.println("SDSC");
\n} else if(cardType == CARD_SDHC){
\nSerial.println("SDHC");
\n} else {
\nSerial.println("UNKNOWN");
\n}<\/p>\n
uint64_t cardSize = SD_MMC.cardSize() \/ (1024 * 1024);
\nSerial.printf("SD_MMC Card Size: %lluMB\\n", cardSize);<\/p>\n
listDir(SD_MMC, "\/", 0);
\ncreateDir(SD_MMC, "\/mydir");
\nlistDir(SD_MMC, "\/", 0);
\nremoveDir(SD_MMC, "\/mydir");
\nlistDir(SD_MMC, "\/", 2);
\nwriteFile(SD_MMC, "\/hello.txt", "Hello ");
\nappendFile(SD_MMC, "\/hello.txt", "World!\\n");
\nreadFile(SD_MMC, "\/hello.txt");
\ndeleteFile(SD_MMC, "\/foo.txt");
\nrenameFile(SD_MMC, "\/hello.txt", "\/foo.txt");
\nreadFile(SD_MMC, "\/foo.txt");
\ntestFileIO(SD_MMC, "\/test.txt");
\n}<\/p>\n
void loop(){<\/p>\n
}<\/p>\n
[\/cpp]<\/p>\n","protected":false},"excerpt":{"rendered":"
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<\/a><\/p>\n