SPRACK2A Application note

SPRACK2A September 2019 – March 2020 TMS320F280021 , TMS320F280021-Q1 , TMS320F280023 , TMS320F280023-Q1 , TMS320F280023C , TMS320F280025 , TMS320F280025-Q1 , TMS320F280025C , TMS320F280025C-Q1 , TMS320F280040-Q1 , TMS320F280040C-Q1 , TMS320F280041 , TMS320F280041-Q1 , TMS320F280041C , TMS320F280041C-Q1 , TMS320F280045 , TMS320F280048-Q1 , TMS320F280048C-Q1 , TMS320F280049 , TMS320F280049-Q1 , TMS320F280049C , TMS320F280049C-Q1

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4.6.2 NoINIT Struct Fix (linker command)

With EABI, the SECTIONS area of a linker command file has to be modified as shown in the example below in order for the registers or memory areas to not be initialized to a zero value. This is important as failure to make this modification can result to unintended behavior when register bits are forced to zero during start up. By default, EABI initializes registers or memory areas defined in the SECTIONS part of the linker to zero.

Linker modification example:

SECTIONS
{
:
Regs1File :> REG1_ADDR, type=NOINIT
Regs2File :> REG2_ADDR, type=NOINIT
:
}