Timer

Table of Contents

• Features Supported
• Features NOT Supported
• Important Usage Guidelines
• Example Usage
• API

Features Supported

• APIs to setup timer configuration
• APIs to start and stop the timer
• APIs to get the current timer count
• APIs to check for counter overflow and clear timer overflow interrupt

Features NOT Supported

NA

Important Usage Guidelines

• Support configuration for DM timer
• Supports continues and oneshot mode
• When configuring the timer period in micro second the 'periodInNsec' should be set to 0

Example Usage

Include the below file to access the APIs,

#include <kernel/dpl/TimerP.h>

Example usage to initialize the timer

    TimerP_Params timerParams;
    /* setup timer but dont start it */
    TimerP_Params_init(&timerParams);
    timerParams.inputPreScaler    = 1u;
    timerParams.inputClkHz        = 250u*1000u*1000u;
    timerParams.periodInUsec      = 10u*1000u;
    timerParams.oneshotMode       = 0;
    timerParams.enableOverflowInt = 1;
    TimerP_setup(timerBaseAddr, &timerParams);

Example usage to start the timer

    /* start the tick timer */
    TimerP_start(timerBaseAddr);

Example usage to get the current count value

    uint32_t count;
 
    /* start the tick timer */
    count = TimerP_getCount(timerBaseAddr);
    (void) count; /* kill warning of variable set but not used */

Example usage to stop the timer

    /* stop the tick timer */
    TimerP_stop(timerBaseAddr);

API

APIs for timer setup and control