clear EEPROM and read recent results

arduino/v5.3/prime_Arduino_clear_EEPROM/prime_Arduino_clear_EEPROM.ino

@@ -0,0 +1,15 @@
+// Clear EEPROM for the 11x4 bytes where float time is stored
+
+#include <EEPROM.h>
+
+const uint32_t scope[] = {100, 1000, 10000, 100000, 1000000, 10000000, 25000000, 100000000, 1000000000, 2147483647, 4294967295};
+const uint32_t number_primes[] = {25, 168, 1229, 9592, 78498, 664579, 1565927, 5761455, 50847534, 105097564, 203280221}; 
+
+void setup(void) {
+  for(int i = 0; i < 11; i++) {
+    EEPROM.put(i * 4 + 1, 0.0);
+  }      
+}
+
+void loop(void) {
+}

arduino/v5.3/prime_Arduino_read_EEPROM/prime_Arduino_read_EEPROM.ino

@@ -0,0 +1,24 @@
+// read EEPROM for the 11x4 bytes where time is stored as float
+
+#include <EEPROM.h>
+
+const uint32_t scope[] = {100, 1000, 10000, 100000, 1000000, 10000000, 25000000, 100000000, 1000000000, 2147483647, 4294967295};
+
+void setup(void) {
+  Serial.begin(9600);  
+  Serial.print("\nGet previous results for this Arduino Uno:\n");
+  Serial.print("    last         time  \n");
+  for(int i = 0; i < 11; i++) {
+    int spaces = 10 - (int)log10(scope[i]);
+    for(int j = 0; j < spaces; j++) { Serial.print(" "); }
+    Serial.print(scope[i]);
+    Serial.print("    ");
+    float last_time;
+    EEPROM.get(i * 4 + 1, last_time);
+    Serial.print(last_time, 6);
+    Serial.print("\n");
+  }  
+}
+
+void loop(void) {
+}

arduino/v5.3/prime_Arduino_read_EEPROM_nice/prime_Arduino_read_EEPROM_nice.ino

@@ -0,0 +1,25 @@
+// read EEPROM for the 11x4 bytes where time is stored as float
+
+#include <EEPROM.h>
+
+const uint32_t scope[]     = {100, 1000, 10000, 100000, 1000000, 10000000, 25000000, 100000000, 1000000000, 2147483647, 4294967295};
+const uint32_t nr_primes[] = {25, 168, 1229, 9592, 78498, 664579, 1565927, 5761455, 50847534, 105097564, 203280221}; 
+const char*    label[]     = {"100", "1,000", "10,000", "100,000", "1,000,000", "10,000,000", "25,000,000", "100,000,000", "1,000,000,000", "2,147,483,647", "4,294,967,295"};
+
+void setup(void) {
+  Serial.begin(9600);  
+  Serial.print("\nGet previous results for this Arduino Uno:\n");
+  Serial.print(" calculated to    time in seconds   \n");
+  for(int i = 0; i < 11; i++) {
+    int spaces = 14 - strlen(label[i]);
+    for(int j = 0; j < spaces; j++) { Serial.print(" "); }
+    Serial.print(label[i]);
+    Serial.print("    ");
+    float last_time_seconds;
+    EEPROM.get(i * 4 + 1, last_time_seconds);
+    Serial.println(last_time_seconds, 6);
+  }  
+}
+
+void loop(void) {
+}