TMS570LS3137: Problem initializing flash API V2.01.01

Martin Beaucage

Part Number: TMS570LS3137

Hello,

We have been using an old flash API V1.00 for our bootloader for years and we recently decided to update the API to version V2.01.01.

We are having problems when calling function Fapi_initializeFlashBanks( 180 ), it returns status Fapi_Error_InvalidHclkValue and if we ignore this error, erasing operation fail.

The frequency we use is 180MHz with RWAIT set to 3 and ASWSTEN set to 1.

If we use a frequency of 140MHz with RWAIT set to 2 and ASWSTEN set to 0 it works intermittently.

If we use a frequency of 100MHz with RWAIT set to 2 and ASWSTEN set to 0 it works all the time.

Is there a maximum frequency to use the API? Should I use different wait state configuration?

Thanks,

Martin

over 7 years ago

0 QJ Wang over 7 years ago

TI__Guru**** 196226 points

Hello Martin,

The maximum frequency is the HCLK for the device. The flash supports a maximum CPU clock speed of 160 MHz in pipelined mode for the PGE Package and 180 MHz for the ZWT package, with one address wait state and three data wait states.

0 Martin Beaucage over 7 years ago in reply to QJ Wang

Intellectual 860 points

Hello,

We are using the ZWT package at 180MHz with one address wait state and three data wait states and we are getting the Fapi_Error_InvalidHclkValue error.

Can you tell me what is verified to declare this error?

Thanks,

Martin

0 QJ Wang over 7 years ago in reply to Martin Beaucage

TI__Guru**** 196226 points

Hi Martin,

Tested flash API on TMS570LS3137 ZWT device with 180MHz system clock, I didn't see the issue. The return value of "Fapi_initializeFlashBanks(..)" is 0.

0 Martin Beaucage over 7 years ago in reply to QJ Wang

Intellectual 860 points

Hi,

Yes, I believe you. I think there might be something wrong with some other configuration in my project.

Would it be possible to get the source code for this function. I would like to see what the function is validating in order to find what I am doing wrong.

Thanks,

Martin

0 QJ Wang over 7 years ago in reply to Martin Beaucage

TI__Guru**** 196226 points

Hi Martin,

Attached is the project I used for testing the flash API. PLL is 180Mhz.

5355.Flash_API_Test.zip

0 Martin Beaucage over 7 years ago in reply to QJ Wang

Intellectual 860 points

Hello,

Thanks for the code. I found my problem, the eeprom wait state (ewait) was not configured so the number of wait state was wrong.
The flash API woks at 180MHz now.

Thanks,

Martin

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TMS570LS3137: Problem initializing flash API V2.01.01