TMS320F280023: LIN interrupt priority

Hi Kotaro,

The PIE Channel Mapping table provides a list of the interrupt lines for the device peripherals and shows where they fall in terms of priority within the PIE module. The lower the interrupt number, the higher priority it is. The table also informs the user which PIE registers are designated for specific peripherals. For example, interrupt "LINA0" is designated as interrupt INT8.9 in the PIE and is considered higher priority than "LINA1" which is interrupt INT8.10 in the PIE. The PIE chapter has more detailed information on how the prioritization and function of interrupt enabling/calling works.

In regard specifically to the four LIN interrupts: There are two LIN modules on the F28002x device, and these are referred to as "LINA" and "LINB". For each LIN module, there are also two interrupts lines: INT0 and INT1. As a result, the PIE channel acknowledges that there are 4 different interrupt lines (INT0 and INT1 for LINA and INT0 and INT1 for LINB). Please see the TRM section below for a description on INT0 vs. INT1:

As the TRM section from above mentions, the LIN interrupts (for example, transmitter and receiver interrupts), are configurable in terms of whether they belong on the INT0 or INT1 line - you can set the interrupt level (as in, priority level INT0 versus level INT1) using the SCISETINTLVL register- you can refer to the TRM register descriptions for the full list of the applicable interrupts (example from TRM below):

This information is all in the TRM, so let me know if you have trouble locating it!

Best Regards,

Allison

Hi Kotaro, 

Yes, this is correct. LINA0 is INT0 for LINA. LINA1 is INT1 for LINA. This is analogous for LINB.

Best Regards,

Allison