lazuriteでsd-card

概要

lazuriteでsd-cardやってみた。

写真

回路図

サンプルコード

#define SDSPI_SS_PIN        ( 4 )
#define BUF_SIZE            ( 32 )
#define SECOND              ( 0 )
#define MINUTE              ( 0 )
#define HOUR                ( 10 )
#define DAY                 ( 30 )
#define MONTH               ( 7 )
#define YEAR                ( 18 )
void initRTC() 
{
    Serial.println("RTC started.");
    RTC.begin();
    RTC.setTime(HOUR, MINUTE, SECOND);
    RTC.setDate(DAY, MONTH, YEAR);
}
void setup() 
{
    st_File_v myFile;
    static uint8_t writebuf[] = "testing 1, 2, 3.";
    static uint8_t readbuf[BUF_SIZE+1];
    uint16_t remained;
    File.init(&myFile);
    Serial.begin(115200);
    initRTC();
    Serial.println("\nInitializing SD card...");
    if (!SD.begin(SDSPI_SS_PIN)) 
    {
        Serial.println("Initializing failed.");
        return;
    } 
    else 
    {
        Serial.println("\nInitializing successed and card is present.");
    };
    if (SD.open("test.txt", FILE_WRITE_APPEND, &myFile)) 
    {
        Serial.print("Writing to test.txt...");
        File.write(&myFile, writebuf, sizeof(writebuf)-1);
        File.close(&myFile);
        Serial.println("\ndone.");
    } 
    else 
    {
        Serial.println("\nerror opening test.txt");
    }
    if (SD.open("test.txt", FILE_READ, &myFile)) 
    {
        Serial.println("Reading from test.txt:");
        while ((remained = File.available(&myFile)) != 0) 
        {
            if (remained > BUF_SIZE) remained = BUF_SIZE;
            File.read(&myFile, readbuf, remained);
            readbuf[remained] = NULL;
            Serial.print(readbuf);
        }
        File.close(&myFile);
        Serial.println("\ndone.");
    } 
    else 
    {
        Serial.println("\nerror opening test.txt");
    }
}
void loop() 
{
}

結果

RTC started.

Initializing SD card...

Initializing successed and card is present.
Writing to test.txt...
done.
Reading from test.txt:
testing 1, 2, 3.testing 1, 2, 3.testing 1, 2, 3.
done.

以上。