LP5569: LP5569 program SRAM using FTDI

Srinivasan Krishnamurthy

Part Number: LP5569

Hello Jack,

I am also trying to program LP5569 SRAM using FTDI , but i am unable to get through it.

I followed the same patterns and Load SRAM function from Example code of MPS432,but I am not able to write to SRAM no LED is glowing.

Did you follow any document or sample code to Program SRAM using FTDI ?

If so can you please share ?

-Srini

over 6 years ago

0 Kenneth Du over 6 years ago

TI__Genius 14295 points

Hi, Srini,

It's OK if you can send I2C commands.

Let's first check if you can light up the LED without SRAM?

0 Srinivasan Krishnamurthy over 6 years ago in reply to Kenneth Du

Prodigy 120 points

Hello Kenneth,

Yes we are able to Light up LED without SRAM using direct control.

Thanks,

Srini

0 Kenneth Du over 6 years ago in reply to Srinivasan Krishnamurthy

TI__Genius 14295 points

Hi, Srini,

Then I think you need to send the data array to the SRAM.

As you can see from the reference code, if you want to send the the table_32 to the chip, you need to send the 16*32 bytes data to the SRAM from 50h to 6Fh.

Please refer to load_SRAM() function in the code.

0 Kenneth Du over 6 years ago in reply to Kenneth Du

TI__Genius 14295 points

Hi, Srini,

I'll close this thread due to inactivity and if you have more questions please reply to it directly and it will open again.

0 Srinivasan Krishnamurthy over 6 years ago in reply to Kenneth Du

Prodigy 120 points

Hello Kenneth,

Thanks for your support.

How can we erase or overwrite SRAM without Power reset ?

Thanks,

Srini

0 Kenneth Du over 6 years ago in reply to Srinivasan Krishnamurthy

TI__Genius 14295 points

Hi, Srini,

You need to send new data to overwrite it.

You can just disable the engine if not using it.

Power management

Power management forum

LP5569: LP5569 program SRAM using FTDI