MSP432P401V: Startup and System files for 401V and 401R

KrishnaD

Part Number: MSP432P401V

Hello,

I am working on a custom board which has the msp432p401V on board.To understand things better,I started my development with the msp432p401R launchpad and created an example which works fine at 48MHz clock.I changed my example to use the startup,icf and system files for the 401V , changed the defines and made sure everything compiles.When I run the example, it seems to be getting the wrong clock frequency.Instead of using the 48MHz DCO, for some reason it thinks I am using the _LFXTCLK instead of _DCOCLK. This behaviour is only seen for 48MHz clock. If I use 24MHz, it seems to work fine.Also I tried swapping the 401v files with 401r files and it works perfectly fine there for the 48MHz. Is is ok to use the 401r system,icf and startup files for 401v processor? Any ideas why I am seeing this behavior?

over 4 years ago

0 PM over 4 years ago

TI__Mastermind 27145 points

Hi,

I sent it to a concerned engineer. We will get back to you ASAP. Please bear with us.

Thanks,

0 KrishnaD over 4 years ago in reply to PM

Intellectual 350 points

Thank you.

0 Michael Reymond over 4 years ago in reply to KrishnaD

TI__Mastermind 40965 points

Hi,

What files and settings are you changing when you move from the 401v to 401r settings? You should be using the files specific to your board. Among other potential issues, you won't have access to the full memory range of the 401v if you use the 401r files, negating the main difference between the 401v and 401r.

How are you changing the system clock? Are you using a sysconfig/TI drivers project and specifying the system clock through PowerMSP432_config or are you modifying the system_msp432p401v.c file directly?

Regards,

Michael

0 KrishnaD over 4 years ago in reply to Michael Reymond

Intellectual 350 points

Hello Michael,

Thank you for the response.I am directly modifying the system_msp432p401v.c. I have changed the defines and any reference to the 401r while making the transition..

Regards,

Krishna

0 Michael Reymond over 4 years ago in reply to KrishnaD

TI__Mastermind 40965 points

Hi Krishna,

Are you using the msp432p401v, or the msp432p401vt part? The 401vt part only supports a max clock speed of 24MHz.

Out of curiosity, if you replace the system_msp432p401v.c file with the system_msp432p401r.c file but keep the rest of the device-specific files such as the icf as the 401v version, are you able to run at 48MHz? If so, there might be a bug in the flash wait state settings of the system_msp432p401v.c file. See this E2E post for what you may need to modify:

https://e2e.ti.com/support/microcontrollers/msp430/f/166/p/787876/2919389#2919389

Regards,

Michael

0 KrishnaD over 4 years ago in reply to Michael Reymond

Intellectual 350 points

I am using the msp432p401v part. I had tried earlier with the msp432p401r files and it did seem to work. The fix provided in the link worked for me.

Thank you Michael.

Regards,

Krishna

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MSP432P401V: Startup and System files for 401V and 401R