RTOS/MSP430F5529: what is the meaning of "Interrupt priority = -1" ?

Gilbert

Part Number: MSP430F5529

Tool/software: TI-RTOS

Hi all,

In the following picture, what is the meaning of "Interrupt priority = -1" ? This picture is from the "TI-RTOS Driver Hwis for MSP43x Devices" section of the TI-RTOS User Guide.

Best Regards,

Gilbert

over 8 years ago

0 Ryan Brown1 over 8 years ago

TI__Guru**** 219527 points

Hi Gilbert,

An interrupt priority value of -1 in TI-RTOS leaves the assigned interrupt at its default priority, the values of which are documented in Table 6-1 of the Datasheet.

Regards,
Ryan

0 Gilbert over 8 years ago in reply to Ryan Brown1

Expert 1105 points

Hi Ryan,
May the interrupt priority be changed ?
Best Regards,
Gilbert

0 Ryan Brown1 over 8 years ago in reply to Gilbert

TI__Guru**** 219527 points

Hi Gilbert,

You cannot, but priority will not matter so long as there are not multiple interrupts waiting to be serviced. You can also nest interrupts to jump from servicing one ISR into another regardless of priority. More information is provided in Section 1.3 of the User's Guide.

Regards,
Ryan

**Attention** This is a public forum

MSP low-power microcontrollers

MSP low-power microcontroller forum

RTOS/MSP430F5529: what is the meaning of "Interrupt priority = -1" ?