Configuring a different UART for ROM_UpdateUART()

Soumyajit Das

Other Parts Discussed in Thread: TM4C1294NCPDT

MCU: TM4C1294NCPDT

Hi,

In the Tivaware example codes, I find that in the given example "boot_demo_uart", the code is configuring the UART0 port of the MCU before calling "ROM_UpdateUART();". But I would like to know how to set which COM port (UART) to use for the boot loading purpose. In my existing board with MCU chip TM4C1294NCPDT, the MCU's UART3 is taken out via RS232 level converter. So, I have to configure the function "ROM_UpdateUART();" to use the UART3 of the MCU & not UART0.

How can this be accomplished?

Thanks

Regards

Soumyajit

over 10 years ago

0 Amit Ashara over 10 years ago

TI__Guru**** 244440 points

Hello Soumyajit,

The ROM Boot Loaders are fixed for UART0, SSI0 and I2C0. If you want to use any other instance of the peripherals then you would need to use a flash based boot loader to do so.

The next TivaWare release is going to have the defines for using any other instances and the following application note will help implement a boot loader programmer

www.ti.com/.../spma074.pdf

Regards
Amit

0 Soumyajit Das over 10 years ago in reply to Amit Ashara

Genius 3340 points

Hi Amit,
Thanks for the document link. For the time being I have tested the UART0 based serial boot loader & found it to be working fine. Sooner or later I will implement the custom boot loader following the protocol document you have shared.
--
Regards
Soumyajit

0 Amit Ashara over 10 years ago in reply to Soumyajit Das

TI__Guru**** 244440 points

Hello Soumyajit,

Sure, you are welcome.

Regards
Amit

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Configuring a different UART for ROM_UpdateUART()