ESP32-PaxCounter/src/sdcard.cpp
August Quint ad288b7058
Update sdcard.cpp
added: CWA-handling
2020-09-01 11:52:07 +02:00

121 lines
3.1 KiB
C++

// routines for writing data to an SD-card, if present
// Local logging tag
static const char TAG[] = __FILE__;
#include "sdcard.h"
#ifdef HAS_SDCARD
static bool useSDCard;
static void createFile(void);
File fileSDCard;
bool sdcard_init() {
ESP_LOGI(TAG, "looking for SD-card...");
// for usage of SD drivers on ESP32 platform see
// https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/sdspi_host.html
// https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/sdmmc_host.html
#if HAS_SDCARD == 1 // use SD SPI host driver
useSDCard = SD.begin(SDCARD_CS, SDCARD_MOSI, SDCARD_MISO, SDCARD_SCLK);
//SPI.begin(SDCARD_SCLK, SDCARD_MSO, SDCARD_MOSI, SDCARD_CS);
//delay(10);
//useSDCard = SD.begin(SDCARD_CS, SPI, 40000000, "/sd");
#elif HAS_SDCARD == 2 // use SD MMC host driver
useSDCard = SD_MMC.begin();
#endif
if (useSDCard) {
ESP_LOGI(TAG, "SD-card found");
createFile();
} else
ESP_LOGI(TAG, "SD-card not found");
return useSDCard;
}
void sdcardWriteData(uint16_t noWifi, uint16_t noBle, __attribute__((unused)) uint16_t noBleCWA) {
static int counterWrites = 0;
char tempBuffer[12 + 1];
time_t t = now();
#if (HAS_SDS011)
sdsStatus_t sds;
#endif
if (!useSDCard)
return;
ESP_LOGD(TAG, "writing to SD-card");
sprintf(tempBuffer, "%02d.%02d.%4d,", day(t), month(t), year(t));
fileSDCard.print(tempBuffer);
sprintf(tempBuffer, "%02d:%02d:%02d,", hour(t), minute(t), second(t));
fileSDCard.print(tempBuffer);
sprintf(tempBuffer, "%d,%d", noWifi, noBle);
fileSDCard.print(tempBuffer);
#if (COUNT_CWA)
sprintf(tempBuffer, ",%d", noBleCWA);
fileSDCard.print(tempBuffer);
#endif
#if (HAS_SDS011)
sds011_store(&sds);
sprintf(tempBuffer, ",%5.1f,%4.1f", sds.pm10, sds.pm25);
fileSDCard.print(tempBuffer);
#endif
fileSDCard.println();
if (++counterWrites > 2) {
// force writing to SD-card
ESP_LOGD(TAG, "flushing data to card");
fileSDCard.flush();
counterWrites = 0;
}
}
void createFile(void) {
char bufferFilename[8 + 1 + 3 + 1];
useSDCard = false;
for (int i = 0; i < 100; i++) {
sprintf(bufferFilename, SDCARD_FILE_NAME, i);
// ESP_LOGD(TAG, "SD: looking for file <%s>", bufferFilename);
#if HAS_SDCARD == 1
bool fileExists = SD.exists(bufferFilename);
#elif HAS_SDCARD == 2
bool fileExists = SD_MMC.exists(bufferFilename);
#endif
if (!fileExists) {
// ESP_LOGD(TAG, "SD: file does not exist: opening");
#if HAS_SDCARD == 1
fileSDCard = SD.open(bufferFilename, FILE_WRITE);
#elif HAS_SDCARD == 2
fileSDCard = SD_MMC.open(bufferFilename, FILE_WRITE);
#endif
if (fileSDCard) {
ESP_LOGD(TAG, "SD: name opened: <%s>", bufferFilename);
fileSDCard.print(SDCARD_FILE_HEADER);
#if (COUNT_CWA)
fileSDCard.print(SDCARD_FILE_HEADER_CWA); // for Corona-data (CWA)
#endif
#if (HAS_SDS011)
fileSDCard.print(SDCARD_FILE_HEADER_SDS011);
#endif
fileSDCard.println();
useSDCard = true;
break;
}
}
}
return;
}
#endif // (HAS_SDCARD)