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ModusToolbox Bluetooth SDK

llll_2991886
New Contributor

hi,

       I want to update firmware to cyw20819 using hci uart.

       I have successfully upgrade cyw20819 with minidriver.hex and mainapp.hex, and  only cts and rst  are used. Now we have to try the way without minidriver.hex, but it failed after we sent reset command and the first write_ram command.

Do we have to control the rts?

How can we control the cts, rts and rst in order to upgrade firmware successfully with minidriver.hex

What are the command serial, reset, write_ram and launch_main_app?

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1 Solution
AnjanaM_61
Moderator
Moderator

Hi ,

You have to use Minidriver.hex for downloading to CYW20819 OCF.

You don't have to control the RTS pin, but for downloading the FW using HCI UART , its recommended to connect RTS & CTS pin.

Q) How can we control the cts, rts and rst

Please go through section 7.5.3 Recovery Process  in the guide here: https://www.cypress.com/file/468621/download

Thanks,
Anjana

View solution in original post

1 Reply
AnjanaM_61
Moderator
Moderator

Hi ,

You have to use Minidriver.hex for downloading to CYW20819 OCF.

You don't have to control the RTS pin, but for downloading the FW using HCI UART , its recommended to connect RTS & CTS pin.

Q) How can we control the cts, rts and rst

Please go through section 7.5.3 Recovery Process  in the guide here: https://www.cypress.com/file/468621/download

Thanks,
Anjana

View solution in original post