wemos d1でsd-card

概要

wemosでsd-cardやってみた。

写真

回路図

結果

サンプルコード

#include <SPI.h>
#include <SD.h>

//sdi - pin 11
//sdo - pin 12
//clk - pin 13
//cs  - pin 4

Sd2Card card;
SdVolume volume;
SdFile root;
const int chipSelect = 4;
void setup()
{
    Serial.begin(115200);
    while (!Serial)
    {
        ;
    }
    Serial.print("\nInitializing SD card...");
    if (!card.init(SPI_HALF_SPEED, chipSelect))
    {
        Serial.println("initialization failed. Things to check:");
        Serial.println("* is a card inserted?");
        Serial.println("* is your wiring correct?");
        Serial.println("* did you change the chipSelect pin to match your shield or module?");
        return;
    }
    else
    {
        Serial.println("Wiring is correct and a card is present.");
    }
    Serial.print("\nCard type: ");
    switch (card.type())
    {
    case SD_CARD_TYPE_SD1:
        Serial.println("SD1");
    break;
    case SD_CARD_TYPE_SD2:
        Serial.println("SD2");
    break;
    case SD_CARD_TYPE_SDHC:
        Serial.println("SDHC");
    break;
    default:
        Serial.println("Unknown");
    }
    if (!volume.init(card))
    {
        Serial.println("Could not find FAT16/FAT32 partition.\nMake sure you've formatted the card");
        return;
    }
    uint32_t volumesize;
    Serial.print("\nVolume type is FAT");
    Serial.println(volume.fatType(), DEC);
    Serial.println();
    volumesize = volume.blocksPerCluster();
    volumesize *= volume.clusterCount();
    volumesize *= 512;
    Serial.print("Volume size (bytes): ");
    Serial.println(volumesize);
    Serial.print("Volume size (Kbytes): ");
    volumesize /= 1024;
    Serial.println(volumesize);
    Serial.print("Volume size (Mbytes): ");
    volumesize /= 1024;
    Serial.println(volumesize);
    Serial.println("\nFiles found on the card (name, date and size in bytes): ");
    root.openRoot(volume);
    root.ls(LS_R | LS_DATE | LS_SIZE);
}
void loop(void)
{
}

以上。