SPRUIZ1B July 2023 – August 2024 TMS320F28P650DH , TMS320F28P650DK , TMS320F28P650SH , TMS320F28P650SK , TMS320F28P659DH-Q1 , TMS320F28P659DK-Q1 , TMS320F28P659SH-Q1
The transmitter can transmit frames when triggered by an external source. See Section 27.2.6 for more information on the available external triggers.
To transmit frames using an external trigger, the application must follow the same procedure as described in Section 27.3.2.3.1. The only difference is that in Step 7, the start condition is automatically set when the external trigger condition is met rather than by software.
Note that by externally triggering frames, the frame information to be sent is pulled from the same registers described in the previous section. Because of this, it is possible to send any type of frame from an external trigger including ping, error, and data frames. Also, there is no hardware mechanism by which the FSI can determine if multiple triggers occur. The FSITX takes the data as is, and the application software makes sure that this data has been updated as necessary.
Using TX_EVT_STS fields either by polling or by interrupts, the application can populate or update the frame information to be sent in the next frame