Part Number: TMS320F28377D
Other Parts Discussed in Thread: C2000WARE
Hi,
We faced tow doubts about F28377D:
1) How to eliminate hole? The used Flash memory are not continouse.
2) RAM parameters' value, will they be kept after reset? "type=NOINIT" is used, but they are still reset to 0.
Thanks a lot.
Br, Jordan
Jordan,
1) Are you asking about how to eliminate the holes that are caused by aligning the sections on 128-bit boundary using ALIGN(8) in the linker cmd file? If you want, you can fill the holes with 0xFFFF (using fill option). Aligning sections on a 128-bit boundary is important. Reason is explained in this FAQ - https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/951658/faq-faq-for-flash-ecc-usage-in-c2000-devices---includes-ecc-test-mode-linker-ecc-options. Please search for "Why do you use align directive (ALIGN(x)) in the linker cmd files provided in the C2000Ware examples?" in the FAQ page.
You can use the fill option as shown below:
MEMORY
{
.
.
/* Flash sectors */
FLASH0 : origin = 0x080002, length = 0x001FFE, fill = 0xFFFF /* on-chip Flash */
FLASH1 : origin = 0x082000, length = 0x002000, fill = 0xFFFF /* on-chip Flash */
.
.
}
Below snapshots are taken from the TMS320C28x Assembly Language Tools guide https://www.ti.com/lit/pdf/spru513
2) Regarding RAM values: Are you asking on how to retain the RAM values even after a debug reset? Executing BootROM will initialize the RAMs to zeros. Also, if the debugger is disconnected and connected again, you will notice that the RAMs get initialized to zeros - this is because the gel file's OnTargetConnect() does RAM initialization.
Please note: I am out of office and hence assigned this to our colleague - he can help you if you have further questions.
Thanks and regards,
Vamsi
