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AM6421: question about uart API UART_getIntrIdentityStatus

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Prodigy 120 points

Part Number: AM6421

Tool/software:

Hello,

when I call function "UART_getIntrIdentityStatus" shown below

the status is 12 shown as below

but according to manual refrence, status is limitted in 0, 1, 2, 3, 6, 8, 10, shown below

so what is the meaning of 12?

thank you!

  • 0
    TI__Guru 53943 points

    Hi,

    I understand your question.

    So, when you see a value of 12 or lets suppose you see a value x.

    This value x will be mapped to the register UART_IIR for sure.

    But we also need to keep in mind that we need to right shift the value of x by 1, so x >> 1 to get the exact value of the bits IT_TYPE.

    So suppose while write operation is happening then a value of 2 will be seen, but this 2 is 10b so we need to right shift, hence 1b corresponds to THR Interrupt.

    Hope this helps.

    Regards,

    Vaibhav