MSP430 IAR C/C++ Compiler reference guide - Rice University

Placing code and dataIf you create your own segments, these must also be defined in the linker command fileusing the -Z or -P segment control directives.Code segmentsThis section contains descriptions of the segments used for storing code, and theinterrupt vector table. For a complete list of all segments, see Summary of segments,page 241.STARTUP CODEThe segment CSTART contains code used during system setup (cstartup). The systemsetup code should be placed at the location where the chip starts executing code after areset. For the MSP430 microcontroller, this is at the reset vector address. In addition, thesegments must be placed into one continuous memory space, which means the -Psegment directive cannot be used.In the default linker command file, the following line will place the CSTART segment atthe address 0x1100:-Z(CODE)CSTART=1100-FFBFNORMAL CODECode for normal functions and interrupt functions is placed in the CODE segment. Again,this is a simple operation in the linker command file:/* For MSP430 devices */-Z(CODE)CODE=1100-FFDF/* For MSP430X devices */-Z(CODE)CODE=1100-FFBF,10000-FFFFFINTERRUPT FUNCTIONS FOR MSP430XWhen you compile for the MSP430X architecture, the interrupt functions are placed inthe ISR_CODE segment. Again, this is a simple operation in the linker command file:-Z(CODE)ISR_CODE=1100-FFDFPart 1. Using the compiler41