TMDX570LC43HDK F021 Read and Write Bank 7

Chris Dickerson

Other Parts Discussed in Thread: HALCOGEN

I need to persist data through restart so it can be read by the bootloader. I have an application coded like the flowchart in the F021 PDF. For some reason if I read the values after writing them or verify -- the values aren't there. Also, clearing the bank doesn't work either.

I only need 4 values stored.

    VECTORS (X)      : origin=0x00020020 length=0x00000020 fill=0xFFFFFFFF
    FLASH0  (RX)     : origin=0x00020040 length=0x8000 - 0x40  fill=0xFFFFFFFF
    FLASH1  (RX)     : origin=0x00028000 length=0x00200000 - 0x28000
    FLASH7  (RWX)    : origin=0xf0200000 length=0x1ffff
    STACKS  (RW)     : origin=0x08000000 length=0x00001500
    RAM     (RWX)    : origin=0x08001500 length=0x0007EB00

I'm not sure that the link file is correct. I just setup the first sector of Bank 7 initially, then I expanded it to the whole bank.

over 2 years ago

0 QJ Wang over 2 years ago

TI__Guru**** 186196 points

You can program the EEPROM (flash bank 7) using F021 Flash APIs or The FEE driver generated by HALCoGen.

To program data to EEPROM, you need to follow the procedure below:

1. Configure the EWAIT (EWAIT=8 if HCLK=150MHz)

2. Enable the flash bank, sector

3. Erase the flash sector

4. Write data and ECC to flash

0 Chris Dickerson over 2 years ago in reply to QJ Wang

Intellectual 380 points

I have FAPI_WRITE_EWAIT(8) before initialize, but it still isn't working. I thought I could do this from user mode, is that correct?

0 QJ Wang over 2 years ago in reply to Chris Dickerson

TI__Guru**** 186196 points

Hi Chris,

All the F021 Flash API functions require execution in privilege mode.

0 Chris Dickerson over 2 years ago in reply to QJ Wang

Intellectual 380 points

I need data to persist through a reset/reboot, where can I read/write data without privilege mode? FEE? Can the board run in privilege mode only?

0 QJ Wang over 2 years ago in reply to Chris Dickerson

TI__Guru**** 186196 points

Hi Chris,

You don't have to use the flash APIs to read the data in EEPROM. If the API is not used, you can read the data in user mode.

data = *(uint32_t *) Address;

The TMS570 device can execute the code in different mode: user mode, system mode, FIQ mode, IRQ mode, etc. The privileged mode is a mode other than user mode. The mode is selected by M[4:0] field of MCU CPSR register, and has nothing to do with the HDK board.

0 Chris Dickerson over 2 years ago in reply to QJ Wang

Intellectual 380 points

I thought I had it working but today - Fapi_issueProgrammingCommandForEccAddresses is returning Fapi_Error_InvalidEccAddress for address 0xF0200000 (start of Bank 7). Initialize, select banks, all the setup calls succeed without error.

0 QJ Wang over 2 years ago in reply to Chris Dickerson

TI__Guru**** 186196 points

It's good to know that.

0 Chris Dickerson over 2 years ago in reply to QJ Wang

Intellectual 380 points

I switched to the FEE driver, it works without needing privilege mode.

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TMDX570LC43HDK F021 Read and Write Bank 7