User Guide

Thanks, that helps. One thought - is there a compiler feature that can tell the user what clocks will be active with the program he has written and what current consumption he can expect? Users, like me, who are novices are more interested in creating apps than in optimizing them. Later, when we start thinking about optimization, we would want to know where the ducks are to shoot. Such a feature in the compiler might make the MSP430 more marketable. It might already exist.

Replying to:

Execution will suspend immediately. Code execution will pickup immediately after the device is awakened. So the lines of code will execute after the device wakes back up. The operating modes are described in Chapter 2 of the Family User s Guide. You can download this from the following link:

http://focus.ti.com/mcu/docs/mcuprodtechdoc.tsp?sectionId=95&tabId=1201&familyId=342&techDoc=6&documentCategoryId=6

Please let me know if you need further assistance.

Regards,

If you have further questions please reply to this email. And see the MCU Knowledge Base located at http://www-k.ext.ti.com/sc/technical-support/mcu-kbase

-----Original Message-----
Sent: 3/9/2009 05:45:43 PM
To: support@ti.com
Subject: eZ430-RF2500 demo app question


I am using this product from TI. My question is about the MSP430. What happens when the following line is encountered by the execution unit?
__bis_SR_register(LPM3_bits+GIE); // LPM3 with interrupts enabled

does it suspend operation immediately and go into a low power mode or does it finish execution of the current program before going into LPM3?

If it suspends execution immediately, how does it make sense to suspend execution during a program containing :

SMPL_Ioctl( IOCTL_OBJ_RADIO, IOCTL_ACT_RADIO_SLEEP, "" );
__bis_SR_register(LPM3_bits+GIE); // LPM3 with interrupts enabled
SMPL_Ioctl( IOCTL_OBJ_RADIO, IOCTL_ACT_RADIO_AWAKE, "" );

or even :

while (SMPL_SUCCESS != SMPL_Link(&linkID1))
{
__bis_SR_register(LPM3_bits + GIE); // LPM3 with interrupts enabled
BSP_TOGGLE_LED1();
BSP_TOGGLE_LED2();
}

In these examples, we say go into LPM3 and then we ask it to do other things. Does execution of the program pick up where it left off? Is there an online location I can find answers to such questions?