Tiva TM4C123x ROM User’s Guide -ROM_API_TABLE implementation details?

Hello Tushar,

I would suggest a simple program which call ROM_SysCtlPeripheralEnable for a GPIO Port and then you can use it to step debug through the IDE to see how the ROM Table is interpreted.

Regards

Amit

Hi Amit,

Thanks for your reply. I will definitely try it tomorrow.

However I am looking for information to build ROM code - ROM API Table creation, Peripheral API table creation - implementation details.

Thanks,
Tushar

Hello Tushar,

I think you can "google" a lot on this topic.

Can't commit on this anymore.

Regards

Amit

Tushar Barhate1 said:

I am looking for information to build ROM code

You do realize that you "cannot" create nor alter any code stored w/in MCU's (masked) ROM!

Amit's thus taken you as far as practice allows - your objective appears murky & w/out real prospects...

My purpose is to understand the implementation of masked ROM code and its implementation for this series and implement the similar concept into the TI chip on which I am working.

The TI chip on which, I am working contains Masked ROM and Flash.

Thanks,
Tushar

The chip on which I am working has Masked ROM and I want to put the driver library into Masked ROM.
Per Tiva C series, created ROM_APITable array of pointer (example) as below;
   unsigned int *ROM_APITable[] = {
   (unsigned int *)ROM_ADCAPITable,
}

/* ROM_ADCAPITable is a function pointer */
void (* const ROM_ADCAPITable[])(unsigned char, unsigned char) = {
  ADC_Achannel_Config,
  ADC_Bchannel_Config,
};

However ADC_Achannel_Config function needs only one parameter (void ADC_Achannel_Config(value)  and other API needs 2 parameters(void ADC_Bchannel_Config(value1, value2).

If i use above syntax then warning gets generated for ADC_Achannel_Config function .
So let me know any alternate way or any suggestion in above approach.

Tushar Barhate1 said:

I want to put the driver library into Masked ROM.

As past stated - you cannot, "add/delete/modify" existing content w/in MCU's masked ROM.  What's there - remains there!

You can make function calls to the masked ROM - thus exploiting its usage - but your further goal remains unclear...

You may make use of the "MAP" prefix in conjunction w/function calls which (appears) to "automate" much (maybe all) of what you seek...

Hello Tushar,

I believe cb1 has already pointed it out. A ROM in TIVA devices is truely a Read Only Memory. Such appends cannot be made.

You have to do it in the Flash.

Regards

Amit

Hi All,

The TI chip on which I am working is under development. The Mask ROM and flash size is yet not decided.
I have to create ROM library and based on its size, we will decide size of (mask) ROM for TI chip.

I am working on driver library which will go into (mask) ROM of TI chip (which is under development).To get the size of ROM, I am performing these experiments and referring Tiva C series ROM driver library concept.

Hope now your all doubts are cleared  and looking for the ROM table and peripheral API table information.

Thanks in advance.
Tushar

Hello Tushar,

The clearly the team doing the TI Chip should be able to help you out better,

Regards

Amit