sparkfun · Wenn0101 · Feb 22, 2021 · Feb 7, 2021 · Feb 7, 2021 · Feb 7, 2021
diff --git a/...mples/Example1_PutGet/Example1_GetPut.ino → ...mples/Example1_PutGet/Example1_PutGet.ino b/...mples/Example1_PutGet/Example1_GetPut.ino → ...mples/Example1_PutGet/Example1_PutGet.ino
diff --git a/libraries/EEPROM/examples/Example3_AllFunctions/Example3_AllFunctions.ino b/libraries/EEPROM/examples/Example3_AllFunctions/Example3_AllFunctions.ino
@@ -0,0 +1,231 @@
+/*
+  Reading and writing test of the EEPROM functions on the Artemis
+  By: Nathan Seidle
+  SparkFun Electronics
+  Date: June 24th, 2019
+  This example code is in the public domain.
+
+  SparkFun labored with love to create this code. Feel like supporting open source hardware?
+  Buy a board from SparkFun! https://www.sparkfun.com/products/15376
+
+  Page erase takes 15ms
+  Write byte takes 30ms - This is much longer than Arduino that takes 3.3ms
+  Float write across two words takes 30ms
+  Update (no write) takes 1ms
+*/
+
+#include <EEPROM.h>
+
+// Give a default if the variant does not define one.
+#ifndef A0
+#define A0 0
+#endif
+
+void setup()
+{
+  Serial.begin(115200);
+  Serial.println("EEPROM Examples");
+
+  randomSeed(analogRead(A0));
+
+  EEPROM.init();
+
+  // You may choose to enable more or less EEPROM -
+  // Default length is 1024 bytes (if setLength is not called)
+  EEPROM.setLength(1024 * 1); // this would make the length 1080 bytes. Max is 4096.
+  // Note: larger sizes will increase RAM usage and execution time
+
+  long startTime;
+  long endTime;
+  int randomLocation;
+
+  //Test erase time
+  startTime = millis();
+  EEPROM.erase();
+  endTime = millis();
+  Serial.printf("Time to erase all EEPROM: %dms\n", endTime - startTime);
+
+  //Byte sequential test
+  //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+  Serial.println();
+  Serial.println("8 bit tests");
+  uint8_t myValue1 = 200;
+  byte myValue2 = 23;
+  randomLocation = random(0, EEPROM.length() - sizeof(myValue1));
+
+  startTime = millis();
+  EEPROM.write(randomLocation, myValue1); //(location, data)
+  endTime = millis();
+  EEPROM.put(randomLocation + sizeof(myValue1), myValue2);
+
+  Serial.printf("Write byte time: %dms\n", endTime - startTime);
+
+  startTime = millis();
+  EEPROM.write(randomLocation, myValue1); //(location, data)
+  endTime = millis();
+
+  Serial.printf("Write identical byte to same location: %dms\n", endTime - startTime);
+
+  byte response1 = EEPROM.read(randomLocation);
+  byte response2 = EEPROM.read(randomLocation + sizeof(myValue1));
+  Serial.printf("Location %d should be %d: %d\n\r", randomLocation, myValue1, response1);
+  Serial.printf("Location %d should be %d: %d\n\r", randomLocation + sizeof(myValue1), myValue2, response2);
+  //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+
+  Serial.println();
+  Serial.println("16 bit tests");
+
+  //int16_t and uint16_t sequential test
+  //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+  uint16_t myValue3 = 3411;
+  int16_t myValue4 = -366;
+  randomLocation = random(0, EEPROM.length() - sizeof(myValue3));
+
+  EEPROM.put(randomLocation, myValue3);
+  EEPROM.put(randomLocation + sizeof(myValue3), myValue4);
+
+  uint16_t response3;
+  int16_t response4;
+  EEPROM.get(randomLocation, response3);
+  EEPROM.get(randomLocation + sizeof(myValue3), response4);
+  Serial.printf("Location %d should be %d: %d\n\r", randomLocation, myValue3, response3);
+  Serial.printf("Location %d should be %d: %d\n\r", randomLocation + sizeof(myValue3), myValue4, response4);
+  //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+
+  Serial.println();
+  Serial.println("32 bit tests");
+
+  //int and unsigned int (32) sequential test
+  //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+  Serial.printf("Size of int: %d\n", sizeof(int));
+  int myValue5 = -245000;
+  unsigned int myValue6 = 400123;
+  randomLocation = random(0, EEPROM.length() - sizeof(myValue5));
+
+  EEPROM.put(randomLocation, myValue5);
+  EEPROM.put(randomLocation + sizeof(myValue5), myValue6);
+
+  int response5;
+  unsigned int response6;
+  EEPROM.get(randomLocation, response5);
+  EEPROM.get(randomLocation + sizeof(myValue5), response6);
+  Serial.printf("Location %d should be %d: %d\n\r", randomLocation, myValue5, response5);
+  Serial.printf("Location %d should be %d: %d\n\r", randomLocation + sizeof(myValue5), myValue6, response6);
+  //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+
+  //int32_t and uint32_t sequential test
+  //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+  int32_t myValue7 = -341002;
+  uint32_t myValue8 = 241544;
+  randomLocation = random(0, EEPROM.length() - sizeof(myValue7));
+
+  EEPROM.put(randomLocation, myValue7);
+  EEPROM.put(randomLocation + sizeof(myValue7), myValue8);
+
+  int32_t response7;
+  uint32_t response8;
+  EEPROM.get(randomLocation, response7);
+  EEPROM.get(randomLocation + sizeof(myValue7), response8);
+  Serial.printf("Location %d should be %d: %d\n\r", randomLocation, myValue7, response7);
+  Serial.printf("Location %d should be %d: %d\n\r", randomLocation + sizeof(myValue7), myValue8, response8);
+  //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+
+  //float (32) sequential test
+  //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+  Serial.printf("Size of float: %d\n", sizeof(float));
+  float myValue9 = -7.35;
+  float myValue10 = 5.22;
+  randomLocation = random(0, EEPROM.length() - sizeof(myValue9));
+
+  EEPROM.put(randomLocation, myValue9);
+  EEPROM.put(randomLocation + sizeof(myValue9), myValue10);
+
+  float response9;
+  float response10;
+  EEPROM.get(randomLocation, response9);
+  EEPROM.get(randomLocation + sizeof(myValue9), response10);
+  Serial.printf("Location %d should be ", randomLocation);
+  Serial.print(myValue9);
+  Serial.print(": ");
+  Serial.print(response9);
+  Serial.println();
+  Serial.printf("Location %d should be ", randomLocation + sizeof(myValue9));
+  Serial.print(myValue10);
+  Serial.print(": ");
+  Serial.print(response10);
+  Serial.println();
+  //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+
+  Serial.println();
+  Serial.println("64 bit tests");
+
+  //double (64) sequential test
+  //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+  Serial.printf("Size of double: %d\n", sizeof(double));
+  double myValue11 = -290.3485723409857;
+  double myValue12 = 384.95734987;
+  double myValue13 = 917.14159;
+  double myValue14 = 254.8877;
+  randomLocation = random(0, EEPROM.length() - sizeof(myValue11));
+
+  startTime = millis();
+  EEPROM.put(randomLocation, myValue11);
+  endTime = millis();
+  Serial.printf("Time to record 64-bits: %dms\n", endTime - startTime);
+
+  EEPROM.put(randomLocation + sizeof(myValue11), myValue12);
+  EEPROM.put(EEPROM.length() - sizeof(myValue13), myValue13); //Test end of EEPROM space
+
+  double response11;
+  double response12;
+  double response13;
+  EEPROM.get(randomLocation, response11);
+  EEPROM.get(randomLocation + sizeof(myValue11), response12);
+  EEPROM.get(EEPROM.length() - sizeof(myValue13), response13);
+
+  Serial.printf("Location %d should be ", randomLocation);
+  Serial.print(myValue11, 13);
+  Serial.print(": ");
+  Serial.print(response11, 13);
+  Serial.println();
+  Serial.printf("Location %d should be ", randomLocation + sizeof(myValue11));
+  Serial.print(myValue12, 8);
+  Serial.print(": ");
+  Serial.print(response12, 8);
+  Serial.println();
+  Serial.printf("Edge of EEPROM %d should be ", EEPROM.length() - sizeof(myValue13));
+  Serial.print(myValue13, 5);
+  Serial.print(": ");
+  Serial.print(response13, 5);
+  Serial.println();
+
+  double response14;
+  EEPROM.put(EEPROM.length() - sizeof(myValue14), myValue14); //Test the re-write of a spot
+  EEPROM.get(EEPROM.length() - sizeof(myValue14), response14);
+  Serial.printf("Rewrite of %d should be ", EEPROM.length() - sizeof(myValue14));
+  Serial.print(myValue14, 4);
+  Serial.print(": ");
+  Serial.print(response14, 4);
+  Serial.println();
+  //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+
+  Serial.println();
+  Serial.println("String test");
+
+  //String write test
+  //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+  char myString[19] = "How are you today?";
+  randomLocation = random(0, EEPROM.length() - sizeof(myString));
+  EEPROM.put(randomLocation, myString);
+
+  char readMy[19];
+  EEPROM.get(randomLocation, readMy);
+  Serial.printf("Location %d string should read 'How are you today?': ", randomLocation);
+  Serial.println(readMy);
+  //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+
+}
+
+void loop()
+{
+}
diff --git a/libraries/EEPROM/src/EEPROM.h b/libraries/EEPROM/src/EEPROM.h
@@ -27,9 +27,15 @@ class EEPROMClass : public FlashIAPBlockDevice {
     void config(eeprom_config_t cfg){
         _cfg = cfg;
     }
+    mbed::bd_size_t length(void){
+        return(_cfg.sram_bytes);
+    }
     void configSramUsage(mbed::bd_size_t bytes){
         _cfg.sram_bytes = bytes;
     }
+    void setLength(mbed::bd_size_t bytes){ //Old function to maintain compatibility
+        configSramUsage(bytes);
+    }
 
     void read(int idx, uint8_t* data, uint32_t size){
         FlashIAPBlockDevice::read(data, idx, size);
@@ -40,16 +46,17 @@ class EEPROMClass : public FlashIAPBlockDevice {
         return val;
     }
     void write(int idx, uint8_t* data, uint32_t size){
-        mbed::bd_size_t scratch_size = (_cfg.sram_bytes+3)/4;
-        uint32_t scratch[scratch_size];
+        mbed::bd_size_t scratch_size = _cfg.sram_bytes;
+        uint8_t scratch[scratch_size];
+
         FlashIAPBlockDevice::read((uint8_t*)scratch, 0, _cfg.sram_bytes);   // keep all of flash in sram in case we need to erase
-		if(memcmp((void*)(((uint8_t*)scratch) + idx), data, size)){         // compare desired data (data) to existing information in flash (scratch)
+
+        if(memcmp((void*)(((uint8_t*)scratch) + idx), data, size)){         // compare desired data (data) to existing information in flash (scratch)
+		    memcpy(scratch + idx, data, size);
             erase();
-			memcpy(scratch, data, size);
-            int result = FlashIAPBlockDevice::program((uint8_t*)scratch, 0, 4*scratch_size);
+            int result = FlashIAPBlockDevice::program((uint8_t*)scratch, 0, scratch_size);
             return;
         }
-        printf("contents already match\n");
     }
     void write(int idx, uint8_t val){
         write(idx, &val, 1);