CC2538: How does the UART work in the ZNP?

Jason Cole26

Part Number: CC2538
Other Parts Discussed in Thread: CC2530

I'm having a poke around the code for the TI2538ZNP and cannot see how it is supposed to work.

It looks as though events are generated by HalUARTPollISR(), which is called by HalUARTPoll(), which is called from Hal_ProcessPoll().

Hal_ProcessPoll is called from two locations:

1) In osal_run_system(), once before the main loop (called from osal_start_system())

2) In the main loop of osal_start_znp() – OSAL_ZNP.c (called only from TI2530ZNP ZMain.c)

In the TI2538ZNP ZMain.c, osal_start_system() is called from main().

I can clearly see how it works for the 2530; is there something I am missing for the 2538?

over 7 years ago

0 YiKai Chen over 7 years ago

Guru 735695 points

Can you be more specifically described which part or component you are asking to understand on CC2538ZNP?

0 Jason Cole26 over 7 years ago

Intellectual 710 points

0 Jason Cole26 over 7 years ago in reply to Jason Cole26

Intellectual 710 points

Could the highlighted section be a mistake?

0 YiKai Chen over 7 years ago in reply to Jason Cole26

Guru 735695 points

CC2538 and CC2530 use different MCU and those two are two different implementations for different MCUs.

0 Jason Cole26 over 7 years ago in reply to YiKai Chen

Intellectual 710 points

Ah - osal_start_system() contains the forever loop. My bad. When stripping out the code within the USE_ICALLS define, the structure becomes clear:

void osal_start_system( void )
{
#if !defined ( ZBIT ) && !defined ( UBIT )
for(;;) // Forever Loop
#endif
{
osal_run_system();
}
}

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CC2538: How does the UART work in the ZNP?