ESP8266 Community Forum

- Sat Aug 15, 2015 3:40 am #26044 Martin,

Hi Buddy, I have modified the snip you sent and get the following error when I compile. Any ideas why the min function is causing this issue? PS: Spiffs.begin is called in setup of the sketch.

error:

C:\ARDUINO\arduino-1.6.5\arduino-1.6.5-r2\portable\packages\esp8266\hardware\esp8266\1.6.5-1044-g170995a\cores\esp8266/Arduino.h:252:18: error: expected unqualified-id before '(' token
#define min(a,b) ((a)<(b)?(a):(b))
^
SPIFFS_MOD.ino:14:27: note: in expansion of macro 'min'
Error compiling.

New routine:

void ShowLargeFile()
{
File f = SPIFFS.open("/Config.cfg", "r");
if (!f) {
Serial.println("Can't open Config.cfg !\r\n");
}
else {
char buf[1024];
int siz = f.size();
while(siz > 0) {
size_t len = std::min((int)(sizeof(buf) - 1), siz);
f.read((uint8_t *)buf, len);
buf[len] = 0;
Serial.println(buf);
siz -= sizeof(buf) - 1;
}
f.close();
}

}



cheers Dans

- Sat Aug 15, 2015 9:40 am #26066 I've faced problem with min() too, but I've workarounded.

viewtopic.php?f=28&t=4528

Maybe you can try adding #include <algorithm> to see if it help, otherwise, change the code with :

Code: Select allsize_t len = sizeof(buf) - 1;
if (siz < len)
  size = len;


- Sat Aug 15, 2015 11:05 am #26074 Thanks Martin,

I will give this a try. Having lots of fun with this, I have been able to connect and download data from a server.
Sometimes the file if not found on the server is filled with HTTP i.e. file requested on server is not there, I will need to add some form of parsing to check that the downloaded file content is correct and not an error thrown by the server, otherwise going good, still so much to learn about spiffs.

Cheers buddy

Dans

- Tue Nov 17, 2015 3:01 am #34278

You can also rely on f.fileSize() and do a while loop, so it will work with any file sizes ...

hi do you know how to config the spiffs when init？