CC1352R: Sensor Controller task with two event triggers

ch701x

Part Number: CC1352R

I have a task with I2C to read accelerometer data (acceleration, gyroscope, pedometer, etc). I'm trying to read the accelerometer and gyroscope every 10ms while only querying the pedometer every 1 second. So I allocated two events like so:

And I initialize them like so:

And I reset the triggers in each respective event handler with the same numbers.

Event Handler A

Event Handler B

However, both event handlers run ~1000ms apart every time. If I change Trigger 1 to evhSetupTimer1Trigger(1,10,2), both event handlers run at ~10ms intervals, always. Even if I attempt to change trigger 1 to 1000ms in the event handler. If I remove Event B entirely from the task, Event Handle A doesn't run at all. Why is this? Is it not possible to run two event triggers in the same task? Am I misunderstanding how to use the timers?

Note: I am using Timer 0 on another task which utilizes the Trigger 0, but that's on an entirely different task and I wouldn't expect it to affect this task.

over 3 years ago

+1 Siri over 3 years ago

TI__Guru* 86231 points

You can do the following:

Have the pedometer code run in the Execution code and set it up to run every 1000 ms

The accelerometer and gyroscope code can run in the EventHandler A Code:

//-----------------------------------------------
// Initialization Code
//-----------------------------------------------
evhSetupTimer1Trigger(0, 10, 2) ;

// Schedule the first execution
fwScheduleTask(1);
//-----------------------------------------------



//-----------------------------------------------
// Execution Code
//-----------------------------------------------
// Pedometer Code

// Schedule the next execution
fwScheduleTask(1);
//-----------------------------------------------



//-----------------------------------------------
// Event Handler A Code
//-----------------------------------------------
// Accelerometer and gyroscope code

evhSetupTimer1Trigger(0, 10, 2) ;
//-----------------------------------------------

In application:

// Enable RTC ticks, with 1 Hz tick interval
scifStartRtcTicksNow(0x00010000 / 1);

Siri

0 ch701x over 3 years ago in reply to Siri

Prodigy 115 points

That solution appears to work as intended. However, I'm still curious about this question in particular:

Is it not possible to run two event triggers in the same task?

0 Siri over 3 years ago in reply to ch701x

TI__Guru* 86231 points

It is not possible to use the same timer for both of the events.

evhSetupTimer1Trigger(0, 10, 2);
evhSetupTimer1Trigger(1, 1000, 2);

the second evhSetupTimer1Trigger will simply overwrite the first one.

Siri

0 ch701x over 3 years ago in reply to Siri

Prodigy 115 points

Thank you.

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CC1352R: Sensor Controller task with two event triggers