on chip flash earsing

dear e2e ,

We are using  tms570ls3137 hdk  , ide we are using is ccs v 6.0 , also  halcogen v 4.4.0 for configuration.

We are trying to erase  on chip flash by using application interface(API021).

We have enabled  SCI/LIN , GIO and N2HET1 in halcogen , where N2HET1  which are used as GPIO  .SCI is using for debugging purpose.

In main program we are setting  HET1 pins are high and erase  sector of BANK0 (sector4(0x00020000)).  i have attached file which contains the function which i am using., Here by using this i am  initialize flash banks , enable the particular bank in flash and there sectors  , when the FSM is free ,  i am send a command to the FSM . When  program  try to set the active BANK in the flash( Fapi_setActiveFlashBank(Bank) ),  program is hanging in that function  .  can u tell the reason for this?

thank you.

Hi Chethan,

You ned to take care of following:

-F021 API's should be executed in Privilege mode.

-You cannot erase/program any sector in the bank where the flash API executes. The reason is the all CPU/DMA access to the bank is suspended during erase and programming.

-You said micros will be programmed frequently. Please note that Flashbank 0 and 1 have program/erase cycle limit -1000 cycles.

dear e2e ,

We are using  tms570ls3137 hdk  , ide we are using is ccs v 6.0 , also  halcogen v 4.4.0 for configuration.

we are trying to erase on chip flash by using API(F021). I have some doubt about coding. I am new to this field . 

Before using the application interface for erasing the flash , Is there necessary  to change from non - privilege mode to privilege mode . Is there is any changes required in the ''sys - intvecs.asm" file. i am asking because my program is hang in this file when i am calling Fapi_setActiveFlashBank() fuction .  Do u have any code related to on chip erasing , can u send ?

Hi Chetan,

Below forum post will provide hints on how to execute F021 from RAM.

http://e2e.ti.com/support/microcontrollers/hercules/f/312/t/450737

Look into linker command file(.cmd).

hi ,

where we can see compiler setting ?

what is the difference b/w normal and V3D16 compiler setting ?

thanks and regards.

chethan r

Hi Chethan,

check for --float_support option in your make files. If you are using ccs to build your project, right click on project->Build->ARM Compiler->Processor Option->Specify floating point support(--float_support).

You can find details on VFP @ https://www.arm.com/products/processors/technologies/vector-floating-point.php

Hi Chethan,

Yes, it is correct.

hi ,

I am trying to erase the sectors in Bank1 from the code executing in Bank0.

I changed the .cmd file according the above requirement. I have attached the .cmd file.

can u tell me changes made in .cmd file is correct? . If there is any changes required in the file please tell me.

6505.cmd file.txt

Hi Chethan,

In previous post, you mentioned that you have enabled VFPv3D16 in compiler but you are not using the correct library in .cmd file. F021_API_CortexR4_BE.lib should be changed to F021_API_CortexR4_BE_V3D16.lib. 

In the forum post I mentioned, you need to check HL_sys_main.c file. It calls copy_in for copying code to RAM. You need to do the same in your project.

Hi Vishwanath,

 Thank you for your support. Whatever u said, i tried but still i am not able to do it. I have some queries regarding this project.

1. Executing Flash API and Flash operation related code from RAM but when i execute the program, the system hangs somewhere. So i have attached my application code so please go through it and tell me what exactly i have missed in it so i can  6646.F2_Erase.zipachieve my goal.

2. In our project we are  looking for program flash using Ethernet and we have achieved it by using this link: SafetyMCU_Ethernet_Boot loader.zip  (which is given in tools & software sections ). I would like to know, is it possible to call Boot Loader Application from our application code?

Hi Chethan,

For point 1, I have tried out your program and was able to execute it successfully. Just to make sure if erase is working correctly, I have added a piece of code to write data at address 0x00200000 and your code was able to successfully erase the sector. I have attached the file for your reference.

For point2, I will assign your query to bootloader expert.3683.sys_main.c

Hi Vishwanath,

Thanks, this code works perfectly for erasing bank0 from bank1 and vise versa. But as per my requirements, i would like to erase bank0  from bank0 only. Can you tell me what exactly i have to do?

Regards,

Chethan

Hi Vishwanath,

Thanks, this code works perfectly for erasing bank0 from bank1 and vise versa. But as per my requirements, i would like to erase bank0 from bank0 only. Can you tell me what exactly i have to do?

Regards,

Chethan

Hi Chethan,

My apologies for delayed reply.

In your base source code, you need to make Bank0 as active using Fapi_setActiveFlashBank, instead of Bank1. 

Dear Vishwanath,

I have tried that, but the application hangs while erasing sectors of same bank( below function :)

Fapi_issueAsyncCommandWithAddress(Fapi_EraseSector, (uint32 *) 0x0020000);

hi ,

we are doing TCPIP communication and on chip flash READ , WRITE in the  code . In that code first we are doing on chip flash operation by using flash api after that we implemented TCPIP in that code .. I am able to successfully  erase and write into on chip flash.When my code start executing TCPIP code my program will hang. I have attached the my program . can you tell what changes have made in code5327.ETH_Demo2.rar?

Hi,

We didn't disabled any interrupt , when we programing flash.

We copied OnChipFlash_WR() to RAM

Chethan,

Yes the Ethernet bootloader is using interrupt while receiving packet from the network.
Once packets are received, and the Flash API is called in RAM to flash the received packets, there is no more interrupt.

So to summarize, It is important to be sure that during execution of the Flash API, interrupt have to be either disable, or, by software architecture, be sure that no more interrupt can be serviced.