TMS570LS1114: How to copy the flash code into ram in order to operate the read and write data based on TMS570LS1114?

Hello Qiu,

1. Define the memory location for flash API in cmd file

For example:  FLASH_API  (RX)  : origin=0x00000020 length=0x000014E0

2. Define the section for flash API in cmd file

For example: 

/* creates an output section named flashAPI */
/* Load the code to FLASH_API (defined in memory{} */
/* Run the code in SRAM */
/* The value of the symbol api_load is the starting load address */
/* The value of api_run is the starting run address */
flashAPI :
{
  Fapi_UserDefinedFunctions.obj (.text)
  flash_operation.obj (.text)          /* your flash erase/program/read etc obj files*/
  --library= ..\..\..\lib\F021_API_CortexR4_BE.lib (.text)  
} load = FLASH_API, run = SRAM, LOAD_START(api_load), RUN_START(api_run), SIZE(api_size)

3. Define a function to copy flashAPI section to SRAM (assembly code)

For example:

;-------------------------------------------------------------------------------
;
; Copy the Flash API from flash to SRAM.
;

.def _copyAPI2RAM_
.asmfunc

_copyAPI2RAM_

.ref api_load
flash_load .word api_load
.ref api_run
flash_run .word api_run
.ref api_size
flash_size .word api_size

ldr r0, flash_load
ldr r1, flash_run
ldr r2, flash_size
add r2, r1, r2
copy_loop1:
ldr r3, [r0], #4
str r3, [r1], #4
cmp r1, r2
blt copy_loop1
bx lr

.endasmfunc

3. Call the function in your main() 

For example:

_copyAPI2RAM_();