Quote:
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Originally Posted by Dave...
We're trying to use a digital compass (available from Digikey) Honeywell model HMR3100. See the datasheet at: http://www.magneticsensors.com/products.html
The ini_aliases.h header file has the following line: #define usart2_RX PORTGbits.PORTG2 However, whenever I try to build the project with "usart2_RX" in my user code, I receive the following error: Executing: "c:\mcc18\bin\mcc18.exe" -p=18F8520 "user_routines.c" -fo="user_routines.o" /i"C:\mcc18\h" -Ou- -Ot- -Ob- -Op- -Or- -Od- -Opa-
C:\EduCode\user_routines.c:328:Error [1205] unknown member 'PORTG2' in '__tag_43' Does anyone know what "unknown member" or "__tag_43" means and how I can resolve this issue? |
That seems to be an error in their default code. Here is the PORTGbits struct from ifi_picdefs.h:
Code:
extern volatile near union {
struct {
unsigned RG0:1;
unsigned RG1:1;
unsigned RG2:1;
unsigned RG3:1;
unsigned RG4:1;
};
struct {
unsigned CCP3:1;
unsigned TX2:1;
unsigned RX2:1;
unsigned CCP4:1;
unsigned CCP5:1;
};
struct {
unsigned :1;
unsigned CK2:1;
unsigned DT2:1;
};
} PORTGbits;
It looks like they wanted
Code:
#define usart2_RX PORTGbits.RG2
or
Code:
#define usart2_RX PORTGbits.RX2
etc...
which is the receive port for USART 2.
The error just doesn't show up if you don't use usart2_RX because the preprocessor doesn't insert PORTGbits.PORTG2 anywhere in the code and the compiler never sees it.