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Microchip PIC C compiler suite


MPC supports the Microchip PIC 12/14/16/17 families, including 8K and flash parts. The MPC Code Development System includes:

an optimising C Cross-compiler.
the BCLink linker.
an Integrated Development Environment and editor.
a built-in macro cross-assembler.


Memory Management


  • MPC includes enhanced memory management such as LOCAL and SPECIAL memory directives. The LOCAL address space directive allows the user to maximize the use of RAM, direct the placement of local variables, re-use RAM locations and pass multiple arguments to functions. The SPECIAL memory directive adds support for variables in all types of memory, external or internal.


  • Features In Detail


  • Other features of the MPC Code Development System include:

    Highly optimised generated code. Full versions generate ROMable code, demonstration versions generate listing files with assembly.

  • part-specific header files describe the unique features of each target device.
  • compiler configuration using #pragma directives.

  • ports are declared and protected using the #pragma port series of directives

  • the #pragma vector directive specifies the location and assigned name for interrupt sources.

  • BClink Linker links object files and libraries compiled with MPC.exe

  • object libraries can be included directly in C source files using Absolute Code Mode.

  • named address spaces support the grouping of variables at specific memory locations.

  • SPECIAL address space declares variables at special locations such as external devices or internal EPROM.


  • LOCAL address space allows you to use local variables.

  • extensions to the C language designed specifically for the embedded systems developer. Some extensions include bit-sized data types, binary constants, extended case statements, direct variable placement with the @ symbol, and support for processor-specific functions.


  • interrupt handler support in C; makes context saving and restoring easy.
    • data types include:
      _bool, bits
      char, short, int, long
      float,float24,float32 (unambiguous ints)
      C99 unambiguous data types: uintx_t, intx_t
      register-oriented types for direct access to processor registers when necessary

  • selectable 8 or 16 bit int data type.

  • packed bit fields in structs.

  • include single and multiple lines of inline assembly within a C program with the #asm and #endasm directives

  • extensive control over computer-generated initializations.

  • generates source-level information required for emulators

  • support for transparent data bank switching

  • support for program memory page switching

  • can call a function located anywhere in memory in the 12-bit core, not just in the bottom half of the memory page

  • support for hardware registers, including setting conf


  • libraries including:

    • math libraries for all PICmicro families

    • delays for 16C5x and 16cxx

    • asynchronous serial routines for 16C73/74 and 17cxx

    • 4 and 8 channel A/D

    • EEPROM access routines

  • optional 32-bit result of 16 X 16 multiply

  • use with Microchip MPLAB (MPLAB Configuration for MPC)

  • source-level debugging with Microchip's PICMASTER emulator system, ICE 2000 emulator, MPLAB-SIM simulator system, Advanced Transdata, Tech-Tools Mathias Clearview