Questions about MPLAC-C30 Compiler

[Regnum]

microchip pic c30 stdout on uart

In MPLAB-C30 (C compiler for Microchip dsPIC30 Family)

1) How do I declare boolean variables ?
2) How do I redirect stdout to the second UART ?

Thanks,
Regnum

 

[PaulHolland]

int 8 c30 compiler

Q1:
#define true 1
#define false 0
#define TRUE 1
#define FALSE 0

typedef unsigned short boolean


//using it

boolean FLAG=false;

FLAG=true;

 

[namqn]

microchip c30 boolean variables

To Regnum:
Look for 'union' in Microchip forum, you should find some good example about using bit fields in a union.

I missed you 2nd question. Have a look at this thread on Microchip forum:
http://forum.microchip.com/tm.aspx?m=176397

To PaulHolland:
You are wasting one unsigned short for every bit.

Cheers,

 

[PaulHolland]

c30 32bit union

To namqn:

I know you use a 16 bits or a byte (8) for every bit (logical) but I don't know what the guy needs. Your union is only usefull if you define funtions to bits but his question was : How do you do boolean. and I told him how to delare a new type !.

A union or structure is only usefull if you have different bits and give them a function, you need to address them yourself and the compiler is NOT arranging them for you !
If code efficiency is the most important thing you should program in asm and forget C, C can be nice but no way it can beat my asm code !. AES128 encryption in 380 bytes (asm) on a 12F series pic you can forget in C

regards,

Paul.

 

[btbass]

microchip c30 compiler

MISRA recomends that you should use typedef for sizes and the posix types.

/*********************************************************************
* File Name     : types.h 
* Description   : Posix Typedef file.                      

* Revision      : 1.0 
* Date          : 21/08/05 
*********************************************************************/

#ifndef TYPES_H
#define TYPES_H
            
/*--- Standard type definitions. ---*/

typedef unsigned char  uint8_t;   /* unsigned 8 bit type definition */
typedef signed char	  int8_t;   /* signed 8 bit type definition */
typedef unsigned int  uint16_t;	/* unsigned 16 bit type definition */
typedef signed int	  int16_t;   /* signed 16 bit type definition */
typedef unsigned long uint32_t;	/* unsigned 32 bit type definition */
typedef signed long	 int32_t;   /* signed 32 bit type definition */
typedef unsigned int      Bool;   /* Bool type definition */

#endif

/*--- Standard constant definition. ---*/

#define False ((uint16_t)0x0000)
#define True  ((uint16_t)0x0001)

/*--- End of file. ---*/

Added after 6 minutes:

The Pic30_tools from Microchip is a port of the GCC compiler which is one bad ass compiler.
I think you'll find that printf() calls putch() for output.
You can write your own putch() function to output to UART2 or CAN or SPI or I2C or whatever.

Added after 2 minutes: