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  • April 16, 2015 at 9:30 pm #1704
    RobHeffo
    Participant

    Hi Radu,

    Reading through the other posts regarding firmware updates. Perhaps if you added an SPI or I2C (depending on what IO is left and available on the ATMega) SRAM chip you could use the new json api to push a hex file into the sram verify it then hand off to the bootloader to read the SRAM and flash it.

    You could also use the SRAM for temp storage when not being used to buffer firmware images.

    Only downside is adding a couple of dollars to the BoM in the SRAM and passives.

    April 29, 2015 at 10:01 pm #1766
    uRADMonitor
    Keymaster

    Not a bad idea and would make the updates so much easier!

    May 4, 2015 at 3:10 am #1782
    RobHeffo
    Participant

    You could use the SRAM as a limited buffer for lost web updates. For example my ADSL2+ connection can get very unstable and loosing updates while the connection is offline gets very real, so buffering the lost updates would be advantageous.

    May 4, 2015 at 3:13 am #1783
    RobHeffo
    Participant

    Also retrofitting the SRAM on a piece of proto board would be pretty straight forward. From what i can see you could tap the SPI lines off the Ethernet module and go straight to a spare I/O line on the ATMega for the chip select

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