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Booting from external SPI Memory, LPC3250

rushi k

Hello Aykut Birsen,

I am also having same problem of booting from external serial flash.

I am using SST25VF040B serial flash.

I have connected SPI1_DATIN Pin to the ground with 100K resistence.
but still its not taking code from serial flash.

But with osilloscope i can see the out put waveforms comming out from ext serial flash's pin 2 which is SPI_DATA_OUT. after the reset.

could you please help me with circuit(with SPI1_DATIN Pin)connections and that code which u loaded into ext serial flash. for my reference.

Thanks in adavance.

Parents Reply Children
  • 0 in reply to Ashley Madison

    ... then don't make posts that invite ridicule!

    How to ask questions the smart way: www.catb.org/.../smart-questions.html

  • 0 in reply to Andy Neil

    hello,
    Actually its my mistake that i have initiated the problem with someones name..
    sorry for that..

    but reason behind that was this problem already discussed.. thats right..
    but that was now read only that to it ended with successful result that's why i thought may he will or someone will help..

    I did't asked for ready solution..but he replied in such a language that "He knows all things from his child birth"

  • 0 in reply to Andy Neil

    @Neil thank's for your link..

    I am already following same path.

    everything i read from Lpc manual about booting sequence i am trying for this Ext_SPI_Boot problem for many days but where i am going wrong i did't understand.

    and then i started finding solution from net thinking that if somebody already gone through this problem then he could help me.

    now i am going to post some code snippets that will give some overview about what i am doing..

            case PROG_3250:   /*8*/
                        {
                                Delay(5000);
                                if(Prog3250Flash())
                                {
                                        Delay(5000);
                                        if(Verify3250Flash())
                                        {
                                                //Success
                                                break;
                                        }
                                }
                        }

    here it is running succesfully.

    but while loading code using KEIL+ULINK I am not finding right setting for my serial flash I have mentioned.(SST25VF040B)

    i have tried with all possible settings avilable in "TagretOptions->Utilities->Settings->adding device"

    Which one to take that one confusing.!!

    Screen shot i can't attach..