chipKIT Project 4: Digital light meter HELP verifying error

Created Mon, 29 Jun 2015 17:04:35 +0000 by ryabsley

ryabsley

Mon, 29 Jun 2015 17:04:35 +0000

from : http://embedded-lab.com/blog/?p=8486

When I try and 'verify" this sketch : P4_LightMeter.pde

I get the following error :

sketch_jun29a.cpp: In function 'void Disp_Data()': sketch_jun29a.cpp:103:20: error: invalid conversion from 'int' to 'const char*' sketch_jun29a.cpp:103:20: error: initializing argument 1 of 'String& String::operator=(const char*)' sketch_jun29a.cpp:113:29: error: invalid conversion from 'int' to 'const char*' sketch_jun29a.cpp:113:29: error: initializing argument 1 of 'String& String::operator=(const char*)' sketch_jun29a.cpp:138:31: error: invalid conversion from 'int' to 'const char*' sketch_jun29a.cpp:138:31: error: initializing argument 1 of 'String& String::operator=(const char*)'

I do have the chipKIT IOShield Library installed in

/Documents/mpide/libraries/

and was able to successfully compile the pulse meter sketch. This one however is giving an error.

p.s., is there a way and/or should I be marking a post as resolved / or not ? if so I did not see how.

thanks very much.

Reg.

djgardn2

Mon, 29 Jun 2015 21:57:55 +0000

Hello ryabsley,

Hopefully this will help you. You might still need to make some changes from here but it will compile and load correctly (W/m^2 will most likely output a longer more accurate number).

Change : Lux_num = int(Lux); To this : Lux_num = String(Lux);

Change : FtCd_num = int(FtCd1000)/1000; To this : FtCd_num = String((FtCd1000)/1000);

Change : Watt_num = int(Wattm21000)/1000; To this : Watt_num = String((Wattm21000)/1000);

Also, then you can comment out (or remove) the following (this is repeated twice in the code so comment out all 8 of them):

IOShieldOled.putString("."); // Print decimal symbol IOShieldOled.putChar(hundreds); IOShieldOled.putChar(tens); IOShieldOled.putChar(ones);

Let me know if you would like a better explanation or the entire code file if you still have problems.

ryabsley

Tue, 30 Jun 2015 17:01:23 +0000

This is GREAT ! thanks very much.

I think this should do it. When I get a chance I shall try thiese changes and let you know how things went.

Thanks djgardn2

ryabsley

Thu, 02 Jul 2015 18:06:19 +0000

ok great. We made the changes you suggested and the code compiled just fine.

Thanks so much djgardn2 :)

Reg