67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
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// routines for writing data to an SD-card, if present
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// Local logging tag
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static const char TAG[] = __FILE__;
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#include "sdcard.h"
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static bool useSDCard;
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static void createFile(void);
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File fileSDCard;
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bool sdcardInit() {
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ESP_LOGD(TAG, "looking for SD-card...");
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useSDCard = SD.begin(SDCARD_CS, SDCARD_MOSI, SDCARD_MISO, SDCARD_SCLK);
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if (useSDCard)
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createFile();
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return useSDCard;
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}
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void sdcardWriteData(uint16_t noWifi, uint16_t noBle) {
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static int counterWrites = 0;
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char tempBuffer[12 + 1];
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time_t t = now();
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if (!useSDCard)
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return;
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ESP_LOGD(TAG, "writing to SD-card");
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sprintf(tempBuffer, "%02d.%02d.%4d,", day(t), month(t), year(t));
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fileSDCard.print(tempBuffer);
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sprintf(tempBuffer, "%02d:%02d:%02d,", hour(t), minute(t), second(t));
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fileSDCard.print(tempBuffer);
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sprintf(tempBuffer, "%d,%d", noWifi, noBle);
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fileSDCard.println(tempBuffer);
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if (++counterWrites > 2) {
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// force writing to SD-card
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ESP_LOGD(TAG, "flushing data to card");
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fileSDCard.flush();
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counterWrites = 0;
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}
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}
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void createFile(void) {
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char bufferFilename[8 + 1 + 3 + 1];
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useSDCard = false;
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for (int i = 0; i < 100; i++) {
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sprintf(bufferFilename, SDCARD_FILE_NAME, i);
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ESP_LOGD(TAG, "SD: looking for file <%s>", bufferFilename);
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bool fileExists = SD.exists(bufferFilename);
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if (!fileExists) {
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ESP_LOGD(TAG, "SD: file does not exist: opening");
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fileSDCard = SD.open(bufferFilename, FILE_WRITE);
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if (fileSDCard) {
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ESP_LOGD(TAG, "SD: name opended: <%s>", bufferFilename);
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fileSDCard.println(SDCARD_FILE_HEADER);
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useSDCard = true;
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break;
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}
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}
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}
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return;
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}
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