TMS320F28379D: Serial Flash Programming USB vs SCI (USBUART) - C2000 microcontrollers forum - C2000™︎ microcontrollers

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Al M

Prodigy 70 points

Part Number: TMS320F28379D
Other Parts Discussed in Thread: TMDSCNCD28P65X

Hello,

We're working on a design with an F28379 microcontroller.

While JTAG is used for firmware development, we'd like to make firmware updates easier once the board is deployed.

We're considering using a single SCI port with a USB-UART bridge for this purpose. Are there any potential issues with this setup, and what are the USB-UART requirements in terms of speed and features?

For normal operation, we'll use Flash Boot, and for firmware updates, SCI Boot. Is there a way to automatically trigger SCI Boot when the USB is connected? We plan to use USB-UART for debugging using a COM port.

Do you have any reference designs or advice? I've already read the Serial Flash Programming of C2000 documentation, but it lacks information on hardware implementation.

Thank you

over 2 years ago

0 Uttam Reddy Pailla over 2 years ago

TI__Expert 6020 points

Hi Al M,

You can refer any of our EVMs (example: LAUNCHXL-F28P65X) which showcase this USB-UART schematic (or) can refer LAUNCHXL-F28379D using FTDI chip.

Regarding the speed refer this E2E https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/895230/tms320f28027f-increasing-the-usb-uart-speed-in-tms320f28027f-based-design

Also for normal operation query, yes thats feasible. let me loop you with a Boot loader expert.

Thanks & Regards,

Uttam

0 Al M over 2 years ago in reply to Uttam Reddy Pailla

Prodigy 70 points

Hi Uttam,

Thank you very much for the information. I took a look at the available EVMs ( LAUNCHXL-F28P65X and TMDSCNCD28P65X), but having a dedicated MSP430 for the USB-UART takes up too much space on the board and increases the complexity of the design since it requires programming the MSP.

When I looked at the FTDI chip on the F28379D, I found it a bit confusing. They can use the FT2232HQ-REEL as both an XDS100v2 programmer and a USB-UART. I'm wondering how they achieve the USB-JTAG functionality. Does it depend on what's contained in the EEPROM? I haven't been able to find relevant information about XDS100v2 documentation. Do you have more information on that?

My point is, if we choose the FTDI chip for the USB-UART and a bootloader to flash new applications using SCI, why not also add the EEPROM on the FTDI chip for the USB-JTAG interface?

0 Al M over 2 years ago in reply to Uttam Reddy Pailla

Prodigy 70 points

Hi Uttam, any update on my question?
Thank you