TMS320F28035: EEPROM Emulation using internal flash

shwetank vishnu1

Part Number: TMS320F28035

Dear all,

I am working on a motor control project with the TMS320f28035 MCU. With all the things developed I am looking to save some calibration data in the non volatile memory space i.e. Flash in our case. I have done the similar using different MCUs such as the STM32 series where we can take one sector of flash and emulate our EEPROM functionality on top of it.

My doubts :-

1. Is this possible in case of C2000 MCUs ? i.e. Accessing a flash sector while my application code is running from flash only.[Application code is in SECTOR-A and Calibration data to be stored in SECTOR-H]

2. How do I read and write from those spaces?

3. Do I need to unlock the flash from my main application before using these functions i.e. read and write

Thanks

over 4 years ago

0 Kevin Allen18 over 4 years ago

TI__Mastermind 45606 points

Hi SV_V1,

Please take a look at the Application Report below on emulating EEPROM on C2000 devices:

https://www.ti.com/lit/sprab69

shwetank vishnu1 said:
1. Is this possible in case of C2000 MCUs ? i.e. Accessing a flash sector while my application code is running from flash only.[Application code is in SECTOR-A and Calibration data to be stored in SECTOR-H]

This depends on what you mean by "accessing". You cannot program/erase a sector while running code from another, see https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/758750

shwetank vishnu1 said:
2. How do I read and write from those spaces?

Using the Flash API library TI provides. See "API and Examples" section in https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/757585

shwetank vishnu1 said:
3. Do I need to unlock the flash from my main application before using these functions i.e. read and write

See below from https://www.ti.com/lit/spra958 :

When locked, only code executing from secure memory can access data (read or write) in other secured memory. Code executing from unsecure memory can branch to (or call) code in secure memory, but cannot access any data in secure memory.

Best,

Kevin

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TMS320F28035: EEPROM Emulation using internal flash