CPU-Timer

Usage of 32-Bit CPU-Timer 0/1/2. Timer will be configured in microseconds.

CPU-Timer 0 and CPU-Timer 1 can be used in user applications. CPU-Timer 2 is reserved for DSP/BIOS. If the application is not using DSP/BIOS, then CPU-Timer 2 can be used in the application.

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Code example

#include "global_defines.h"                     //Include global_defines.h
#include "cpu_timer/cpu_timer.h"                //Include module of cpu_timer
#include "general_output/general_output.h"      //Include module of general_output
#include "system_controls/system_controls.h"    //Include module of system controls
 
__interrupt void isr(void);                     //Function prototype for interrupt service routine
 
void main(void){
    int result = 0;                             //Optional: can be used to check return values of functions
    setSystemControls();                        //Call setSystemControls() function
    result = init_generalOutputPin(GPIO22);     //Configure GPIO as general output
    result = init_CPUTimer(0, &isr);            //Configure CPU-Timer 0 to call function isr on interrupt. Returns result of operation
    result = CPUTimer_start(0, 1000000);        //Starts CPU-Timer 0 with 1000000 microSec <=> 1 sec. Returns result of operation
    while(1){
                                                //Endless loop
    }
    result = CPUTimer_stop(0);                  //Stops CPU-Timer 0. Returns result of operation
}
 
 
__interrupt void isr(void){                     //Changes value on GPIO22 on every interrupt (every second)
    static int led_on=0;
    if(!led_on){
        generalOutputPin_setPinHigh(GPIO22);
        led_on = 1;
    }
    else{
        generalOutputPin_setPinLow(GPIO22);
        led_on = 0;
    }
    CPUTimer_interruptAck();                    //Acknowledgement to get more interrupts
}

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Documented C-Code of module:

cpu_timer

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Detailed description in Technical Reference Manual:

Technical_Reference_Manual