#include "sdcard.hpp"

extern "C"
{
#include "fatfs.h"
#include "ff.h"
}

bool SDCard::Init()
{
    return f_mount(&fs, "", 1) == FR_OK;
}

bool SDCard::AppendCO2(uint32_t timestamp, uint16_t ppm)
{
    FIL file;

    if (f_open(&file, "co2_log.csv", FA_OPEN_APPEND | FA_WRITE) != FR_OK)
    {
        return false;
    }

    char buffer[64];

    int len = snprintf(buffer, sizeof(buffer), "%lu,%u\r\n", timestamp, ppm);

    UINT written;

    f_write( &file, buffer, len, &written);

    f_close(&file);

    return true;
}