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UART interrupt on DM6437

Yongquan Chen
Prodigy 40 points

Thanks for TimHarron's help. My UART ISR work well on DM6437 now. But i found some other question, can any one help me again?

 1，How can i judge what kind of the interrupt when an UART INT occur?receive interrupt or transmit interrupt？ More detail, when i running my UART ISR program, i find that it will occur interrupt and enter UART ISR whether sending data or receiving data. In my UART ISR, how can i jude the interrupt source?

2，How to configure the interrupt FIFO for DM6437? In my UART ISR, i set a counter for monitoring, i find that the program enter UART ISR when it receive 4 Bytes. Why 4 Bytes ? Could i configure it through some register? such as 16 Bytes one interrupt?

Thansk,

 Yongquan

  • 0
    TI__Mastermind 18130 points

    Yongquan Chen said:
    1，How can i judge what kind of the interrupt when an UART INT occur?receive interrupt or transmit interrupt？ More detail, when i running my UART ISR program, i find that it will occur interrupt and enter UART ISR whether sending data or receiving data. In my UART ISR, how can i jude the interrupt source?

    I think that you are looking for the IIR UART register which records the interrupt event. See section 2.9 of the UART User Guide for more information.

    Yongquan Chen said:
    2，How to configure the interrupt FIFO for DM6437? In my UART ISR, i set a counter for monitoring, i find that the program enter UART ISR when it receive 4 Bytes. Why 4 Bytes ? Could i configure it through some register? such as 16 Bytes one interrupt?
    See the FCR register in the User Guide.