MPC56xx Linking const

dermotmurphy — Tue, 11 Nov 2014 16:29:32 GMT

Hi,

I would like to link a const into a named section in flash on th eMPC5602.

I am trying this in the C file :

#pragma section sconst_type const_type ".NM_CONST" ".NM_CONST"

static const UINT8 NM_BIT_BYTE_POS[NM_NUM_BITS_IN_BYTE] =

{

0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01

} ;

with this added to the LCF file:

MEMORY

{

nm_const_flash: org = 0x00030000, len = 0x00000200

}

SECTIONS

{

.NM_CONST (CONST)

LOAD (ADDR(nm_const_flash))

: {}

}

However when I check the map file, the data is located in .rodata

How do I move the const array NM_BIT_BYTE_POS into the named section?

Re: MPC56xx Linking const

TICS_Fiona — Wed, 12 Nov 2014 03:31:55 GMT

Please see the code below for how to link your constants as expected:

in the C file :

#pragma section RW ".NM_CONST" ".NM_CONST"

__declspec(section ".NM_CONST" )

static const UINT8 NM_BIT_BYTE_POS[NM_NUM_BITS_IN_BYTE] =

{

0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01

} ;

with this added to the LCF file:

SECTIONS

{

......

GROUP:{

.NM_CONST (CONST) LOAD (ADDR(nm_const_flash)) : {}

}> nm_const_flash

......

}

Best Regards

Fiona

Technical Information & Commercial Support

-----------------------------------------------------------------------------------------------------------------------

Note: If this post answers your question, please click the Correct Answer button. Thank you!

-----------------------------------------------------------------------------------------------------------------------

CodeWarrior Development ToolsのトピックMPC56xx Linking const

MPC56xx Linking const

Re: MPC56xx Linking const