Create SPIFlash_Detect.ino

examples/SPIFlash_Detect/SPIFlash_Detect.ino

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+// Blink LED_BUILTIN slower if the FLASH chip is detected, and faster if there is no FLASH chip detected
+// Code by Felix Rusu, LowPowerLab.com
+#include <SPIFlash.h>   //https://github.com/lowpowerlab/spiflash
+#include <SPI.h>
+
+#define SERIAL_ENABLE
+#define BLINK_FAST_DELAY 100
+#define BLINK_SLOW_DELAY 500
+
+SPIFlash flash(SS_FLASHMEM, 0xEF30); //EF40 for 16mbit windbond chip
+int LEDTIME = 500;
+
+// the setup routine runs once when you press reset:
+void setup() {
+#ifdef SERIAL_ENABLE
+  Serial.begin(115200);
+  delay(4000); //wait a bit until SerialMonitor can be opened
+#endif
+  pinMode(LED_BUILTIN, OUTPUT);
+
+  if (flash.initialize()) {
+    Serial.println("SPI Flash Init OK!");
+    LEDTIME = BLINK_SLOW_DELAY;
+  }
+  else
+  {
+    Serial.println("SPI Flash Init FAIL! (is chip soldered?)");
+    LEDTIME = BLINK_FAST_DELAY;
+  }
+}
+
+// the loop routine runs over and over again forever:
+void loop() {
+  word jedecid = flash.readDeviceId();
+#ifdef SERIAL_ENABLE
+  Serial.print("FLASH DeviceID: ");
+  Serial.println(jedecid, HEX);
+  Serial.print("FLASH init "); Serial.println(flash.initialize() ? "OK" : "FAIL");
+#endif    
+  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
+  delay(LEDTIME);               // wait for a second
+  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
+  delay(LEDTIME);               // wait for a second
+}