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F2812;RS485;FLASH programming;F281x_API

Dianchen Zheng
Prodigy 20 points

Hello everyone:

            I'm a freshman of DSP learning. The problem I faced now is that I want to use RS485 to download the program into the F2812's Flash instead of using JTAG .But I don't know where to get start . So is there anyone can give me some advice?

            Thank you very much !

  • 0
    Prodigy 20 points

    Now I used SDFlash to download the program into flaash , but if iI don't change the GPIOF4 from low to high , the DSP will wait for the host's SCI forever , it won't  excute the program downloaed in the flash before.  Is there anyone can tell me how to make the DSP boot from SCI but excute from the Flash. Because I can't change the hardware ,that is the GPIOF4 will stay low.

    thx!

  • 0 in reply to Dianchen Zheng
    TI__Guru* 91125 points

    Dianchen Zheng said:

    Now I used SDFlash to download the program into flaash , but if iI don't change the GPIOF4 from low to high , the DSP will wait for the host's SCI forever , it won't  excute the program downloaed in the flash before.  Is there anyone can tell me how to make the DSP boot from SCI but excute from the Flash. Because I can't change the hardware ,that is the GPIOF4 will stay low.

    thx!

    The SCI loader in the boot ROM does not have a timeout if no traffic is seen on the SCI port.  What you can do is create a custom loader in either flash or OTP that first checks the SCI port and after some time times out and branches to flash if there is no activity.  If there is activity the loader can call the boot ROM routine.  The boot mode would then always be to your custom check routine.

    Regards,

    Lori