Add compile time switches to enable selection of flash chip at compile time to support various flash chips

Author: aentinger

src/Arduino_SPIFFS.cpp

@@ -74,4 +74,8 @@ Directory Arduino_SPIFFS::opendir(const char *name)
  * EXTERN DECLARATION
  **************************************************************************************/
 
-Arduino_SPIFFS filesystem(w25q16_spi_read, w25q16_spi_write, w25q16_spi_erase);
+Arduino_SPIFFS filesystem(
+#if defined(SPIFFS_USE_W25Q16DV_FLASH)
+w25q16_spi_read, w25q16_spi_write, w25q16_spi_erase
+#endif
+);

src/Arduino_SPIFFS.h

@@ -33,6 +33,20 @@ extern "C"
 #include "spiffs.h"
 }
 
+/**************************************************************************************
+ * CONFIGURATION
+ **************************************************************************************/
+
+#define SPIFFS_USE_W25Q16DV_FLASH
+
+/**************************************************************************************
+ * SANITY CHECK
+ **************************************************************************************/
+
+#if !defined(SPIFFS_USE_W25Q16DV_FLASH)
+  #error "Enable at least one flash chip for usage with Arduino_SPIFFS"
+#endif
+
 /**************************************************************************************
  * STATIC ASSERTIONS
  **************************************************************************************/