TMS320F28375S: Bootloader Jumping Issue

Hello,

1. What communication protocol are you using (CAN, SCI, etc.)?

2. Is this a custom bootloader or one of the examples found in the C2000Ware SDK?

3. Is this bootloader running from flash, or is it loaded into RAM after a device reset?

4. Is the code in FLASHE_F part of the application or the bootloader?

5. Which address are you telling the bootloader to jump to?

6. Does this issue occur every time?

Best,

Alex

1.We are using CAN protocol 

2.This is a custom bootloader

3.It is first copied from flash to RAM and it is run

4. FLASH A is dedicated to Boot code

FLASH E_F and FLASHG_H are application

First time(while dumping using dumper),the code dumps into FLASH E_F and I'm trying to jump to FLASH G_H after bootloading 

5.The issue occurs after jumping to FLASH G_H but it doesn't run.

It continuously tries to reset and tries to jump to FLASH G_H(doesn't run though) but again resets

This process is confirmed by using SCI,where I sent few data bytes,to confirm about the code flow.

When I see reset cause register( RESC),  it shows watchdog reset(which we use after bootloading) and XRS status pin are high.

Hello,

A watchdog reset triggers a full CPU reset, so the device will go back through boot ROM and into your bootloader again.

Kunukuntla Geetha said:

First time(while dumping using dumper),the code dumps into FLASH E_F

What address is your bootloader configured to branch to? FLASHE_F or FLASHG_H?

Can you try disabling watchdog?

Best,

Alex

The bootloader is configured to branch to FLASHG_H.

I tried to branch to FLASHG_H without resetting(any type of reset is not triggered), but it doesn't branch even though I manually give the address of FLASHG_H.

As I previously said, I used SCI,

It continuously tries to reset and tries to jump to FLASH G_H(doesn't run though) but again resets.

The output was not altered.

Thanks In Advance.

Hello,

Are you servicing the watchdog interrupt in your bootloader and application code? You may need to disable it in your bootloader and then reenable in your application.

Best,

Alex

Hi,

In bootloader, there is enabling of watchdog such that it should return to bootloader main after watchdog reset and jump to application code and run the application code.

So, enabling of watchdog reset in bootloader is required for us.

Thanks

Hello,

Kunukuntla Geetha said:

First time(while dumping using dumper),the code dumps into FLASH E_F

Are you flashing your code to FLASHE_F or FLASHG_H? Can you provide your linker file?

What is the period for the watchdog reset?

Kunukuntla Geetha said:

FLASH G_H(doesn't run though)

How are you sure that it isn't running? Does the program counter go to FLASHG_H before resetting? Can you step through the code?

Best,

Alex