Texas Instruments TMS320F2837 D Series Workshop Guide And Lab Manual

Reset and Boot Process
TMS320F2837xD Microcontroller Workshop - Reset and Interrupts 4 - 9
Getting to main()
After reset how do we get to main() ?
 At the code entry point, branch to _c_int00()
 Part of compiler runtime support library
 Sets up compiler environment
 Calls main()
.sect “codestart”
LB _c_int00
CodeStartBranch.asm
MEMORY
{
PAGE 0:
BEGIN_M0 : origin = 0x000000, length = 0x000002
}
SECTIONS
{
codestart : > BEGIN_M0, PAGE = 0
}
Linker .cmd
Note: the above example is for boot mode set to RAMM0; to run out of Flash, the
“codestart” section would be linked to the entry point of the Flash memory block
After reset how do we get to main? When the bootloader process is completed, a branch to the
compiler runtime support library is located at the code entry point. This branch to _c_int00 is
executed, then the compiler environment is set up, and finally main is called.

Texas Instruments TMS320F2837 D Series Specifications

General

Brand	Texas Instruments
Model	TMS320F2837 D Series
Category	Microcontrollers
Language	English