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libraries/audio-tools/examples/examples-custom-boards/lyrat-mini/sdmmc/sdmmc.ino

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+/**
+ * @file sdmmc.ino
+ * @author Phil Schatzmann
+ * @brief Test/Demo how to use the SD_MMC API in Arduino with the LyraT Mini
+ * @version 0.1
+ * @date 2024-11-03
+ *
+ * @copyright Copyright (c) 2022
+ */
+
+#include "FS.h"
+#include "SD_MMC.h"
+
+// These pins are defined in the HAL
+const int PIN_SD_CARD_POWER = 13;  
+const int PIN_SD_CARD_DET = 34;
+
+
+// Arduino Setup
+void setup(void) {
+  Serial.begin(115200);
+
+  // Mandatory: set power pin to low
+  pinMode(PIN_SD_CARD_POWER, OUTPUT);
+  digitalWrite(PIN_SD_CARD_POWER, LOW);
+
+  // Optionally: Determine if there is an SD card
+  pinMode(PIN_SD_CARD_DET, INPUT);
+  if (digitalRead(PIN_SD_CARD_DET)!=0){
+    Serial.println("No SD Card detected");
+  }
+
+  // open SDMMC in 1 bit mode
+  if (!SD_MMC.begin("/sdcard", true)) {
+    Serial.println("Card Mount Failed");
+    while(true);
+  }
+
+  // open an existing file
+  auto file = SD_MMC.open("/test.mp3", FILE_READ);
+  if (!file){
+    Serial.println("file open failed");
+    while(true);
+  }
+
+  file.close();
+
+  Serial.println("Success");
+}
+
+// Arduino loop - repeated processing 
+void loop() {}