SD mount problem
Posted: Mon May 09, 2022 8:02 am
I use SPI and SD respectively according to some online example guidelines_ Connect my esp32 and SD card in MMC mode, and SD card can work normally in SPI mode_ Test program, but SD_ After MMC connection, "card mount failed" is always prompted. Then I try to pull up gpio2,4,12,13,15 and change it to "sd_mmc.begin("/sdcard", false)", but the result is still "card mount failed". Can someone help me? I want to use SD_ MMC way, because I use SPI for RFID card reading. Thank you very much!
- /*
- * Connect the SD card to the following pins:
- *
- * SD Card | ESP32
- * D2 12
- * D3 13
- * CMD 15
- * VSS GND
- * VDD 3.3V
- * CLK 14
- * VSS GND
- * D0 2 (add 1K pull up after flashing)
- * D1 4
- */
- #include "FS.h"
- #include "SD_MMC.h"
- #define ONE_BIT_MODE true
- 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());
- }
- }
- 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");
- }
- }
- 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");
- }
- }
- 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();
- }
- void setup(){
- Serial.begin(115200);
- pinMode(2, INPUT_PULLUP);
- pinMode(4, INPUT_PULLUP);
- pinMode(12, INPUT_PULLUP);
- pinMode(13, INPUT_PULLUP);
- pinMode(15, INPUT_PULLUP);
- if(!SD_MMC.begin("/sdcard", ONE_BIT_MODE)){
- Serial.println("Card Mount Failed");
- return;
- }
- uint8_t cardType = SD_MMC.cardType();
- if(cardType == CARD_NONE){
- Serial.println("No SD_MMC card attached");
- return;
- }
- Serial.print("SD_MMC 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_MMC.cardSize() / (1024 * 1024);
- Serial.printf("SD_MMC Card Size: %lluMB\n", cardSize);
- listDir(SD_MMC, "/", 0);
- createDir(SD_MMC, "/mydir");
- listDir(SD_MMC, "/", 0);
- removeDir(SD_MMC, "/mydir");
- listDir(SD_MMC, "/", 2);
- writeFile(SD_MMC, "/hello.txt", "Hello ");
- appendFile(SD_MMC, "/hello.txt", "World!\n");
- readFile(SD_MMC, "/hello.txt");
- deleteFile(SD_MMC, "/foo.txt");
- renameFile(SD_MMC, "/hello.txt", "/foo.txt");
- readFile(SD_MMC, "/foo.txt");
- testFileIO(SD_MMC, "/test.txt");
- Serial.printf("Total space: %lluMB\n", SD_MMC.totalBytes() / (1024 * 1024));
- Serial.printf("Used space: %lluMB\n", SD_MMC.usedBytes() / (1024 * 1024));
- }
- void loop(){
- }
- E (42) sdmmc_common: sdmmc_init_ocr: send_op_cond (1) returned 0x107
- E (43) vfs_fat_sdmmc: sdmmc_card_init failed (0x107).
- Card Mount Failed