I am trying to do some R&D and need to see how the temperature on the RFduino changes in a 5 minute time interval in a location not connected to a serial console, measured every second. I would like to use the built in flash for this. (I am storing bytes so that's 300 bytes of info which should fit on a 1K page, correct?) This is the code I have come up with but it only saves a single value to the flash. Or maybe I am only able to retrieve a single value. It currently runs for 10 seconds (while count<10). How do I save and retrieve the entire values array?
// select a flash page that isn't in use (see Memory.h for more info)
#define MY_FLASH_PAGE 251
// double level of indirection required to get gcc
// to apply the stringizing operator correctly
#define str(x) xstr(x)
#define xstr(x) #x
byte values[500];
int count = 0;
void setup() {
Serial.begin(38400);
Serial.println("All output will appear on the serial monitor.");
// a flash page is 1K in length, so page 251 starts at address 251 * 1024 = 257024 = 3EC00 hex
byte *p = (byte*)ADDRESS_OF_PAGE(MY_FLASH_PAGE);
int rc;
Serial.println("The data stored in flash page " str(MY_FLASH_PAGE) " contains: ");
Serial.println(*p);
Serial.print("Attempting to erase flash page " str(MY_FLASH_PAGE) ": ");
rc = flashPageErase(PAGE_FROM_ADDRESS(p));
if (rc == 0)
Serial.println("Success");
else if (rc == 1)
Serial.println("Error - the flash page is reserved");
else if (rc == 2)
Serial.println("Error - the flash page is used by the sketch");
Serial.println("The data stored in flash page " str(MY_FLASH_PAGE) " contains: ");
Serial.println(*p);
while (count<10){
RFduino_ULPDelay(SECONDS(1));
byte temp = RFduino_temperature(CELSIUS);
Serial.println (count);
Serial.println (temp);
values[count]=temp;
count++;
}
Serial.print("Attempting to write data to flash page " str(MY_FLASH_PAGE) ": ");
rc = flashWriteBlock(p, &values, sizeof(values));
if (rc == 0)
Serial.println("Success");
else if (rc == 1)
Serial.println("Error - the flash page is reserved");
else if (rc == 2)
Serial.println("Error - the flash page is used by the sketch");
Serial.println("The data stored in flash page " str(MY_FLASH_PAGE) " contains: ");
Serial.println(*p);
}
void loop() {
}
This is my output:
All output will appear on the serial monitor.
The data stored in flash page 251 contains:
255
Attempting to erase flash page 251: Success
The data stored in flash page 251 contains:
255
0
33
1
33
2
33
3
33
4
33
5
33
6
33
7
33
8
33
9
33
Attempting to write data to flash page 251: Success
The data stored in flash page 251 contains:
33
I want it to write and retrieve all 10 values!