Create SPIFlash_ReadWrite.ino

Examples/SPIFlash_ReadWrite/SPIFlash_ReadWrite.ino

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+/*
+ * Copyright (c) 2013 by Felix Rusu <felix@lowpowerlab.com>
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of either the GNU General Public License version 2
+ * or the GNU Lesser General Public License version 2.1, both as
+ * published by the Free Software Foundation.
+ */
+
+// This sketch is an example of using the SPIFlash library with a Moteino
+// that has an onboard SPI Flash chip. This sketch listens to a few serial commands
+// Hence type the following commands to interact with the SPI flash memory array:
+// - 'd' dumps the first 256bytes of the flash chip to screen
+// - 'e' erases the entire memory chip
+// - 'i' print manufacturer/device ID
+// - [0-9] writes a random byte to addresses [0-9] (either 0xAA or 0xBB)
+// Get the SPIFlash library from here: https://github.com/LowPowerLab/SPIFlash
+
+#include <SPIFlash.h>
+#include <RFM12B.h>
+#include <SPI.h>
+#include <avr/wdt.h>
+
+#define SERIAL_BAUD      115200
+char input = 0;
+long lastPeriod = -1;
+
+//////////////////////////////////////////
+// flash(SPI_CS, MANUFACTURER_ID)
+// SPI_CS          - CS pin attached to SPI flash chip (8 in case of Moteino)
+// MANUFACTURER_ID - OPTIONAL, 0x1F44 for adesto(ex atmel) 4mbit flash
+//                             0xEF30 for windbond 4mbit flash
+//////////////////////////////////////////
+SPIFlash flash(8, 0xEF30);
+
+void setup(){
+  Serial.begin(SERIAL_BAUD);
+  Serial.print("Start...");
+
+  if (flash.initialize())
+    Serial.println("Init OK!");
+  else
+    Serial.println("Init FAIL!");
+}
+
+void loop(){
+  // Handle serial input (to allow basic DEBUGGING of FLASH chip)
+  // ie: display first 256 bytes in FLASH, erase chip, write bytes at first 10 positions, etc
+  if (Serial.available() > 0) {
+    input = Serial.read();
+    if (input == 'd') //d=dump flash area
+    {
+      Serial.println("Flash content:");
+      int counter = 0;
+
+      while(counter<=256){
+        Serial.print(flash.readByte(counter++), HEX);
+        Serial.print('.');
+      }
+      
+      Serial.println();
+    }
+    else if (input == 'e')
+    {
+      Serial.print("Erasing Flash chip ... ");
+      flash.chipErase();
+      while(flash.busy());
+      Serial.println("DONE");
+    }
+    else if (input == 'i')
+    {
+      Serial.print("DeviceID: ");
+      Serial.println(flash.readDeviceId(), HEX);
+    }
+    else if (input >= 48 && input <= 57) //0-9
+    {
+      Serial.print("\nWriteByte("); Serial.print(input); Serial.print(")");
+      flash.writeByte(input-48, millis()%2 ? 0xaa : 0xbb);
+    }
+  }
+
+  // Periodically blink the onboard LED while listening for serial commands
+  if ((int)(millis()/500) > lastPeriod)
+  {
+    lastPeriod++;
+    pinMode(9, OUTPUT);
+    digitalWrite(9, lastPeriod%2);
+  }
+}