Hi everybody ,
i m on gpio_led_blink_am64x-evm_m4fss0-0_nortos_ti-arm-clang example to learn how to design on this MCUs .
now I configured in Sysconfig I configured Timer 0 ( to add a small delay in the LED blynk example ) , now it is not clear how to call the function in the main GPIO led example :coudl you kindly confirm which is the function to call ( the naming ) .
I succeeded using TIMER.c but not sure how to do it properly .
thank you
BR
Carlo
Given below is sample screenshot to configure TIMER0 with 10us interrupt
In this case we dont start timer after setup, we have setup in continous mode i.e every 10us a ISR will fire and we have registered a ISR test_timerIsr which will be called every 10us.
Now we need to implement test_timerIsr in our code and the start the timer and then wait for a flag from the ISR as shown below
// ti_dpl_config.h is included by below file, this file has definition and extern for gTimerBaseAddr, CONFIG_TIMER0
#include "ti_drivers_open_close.h"
volatile uint32_t gTimerExpired = 0;
void test_timerIsr(void *args)
{
/* we use global variable and polling, when using RTOS, one can post semaphore instead */
gTimerExpired = 1;
}
my_main_loop()
{
/* timer and HW interrupt is already setup during System_init,
so we need to only start the timer and start waiting on interrupts
*/
gTimerExpired = 0;
TimerP_start(gTimerBaseAddr[CONFIG_TIMER0]);
while(1) {
LED_on(..)
/* wait for interrupt */
while(gTimerExpired != 1 )
;
gTimerExpired = 0;
LED_off(...)
}
/* when all is done stop the timer to stop the interrupts */
TimerP_stop(gTimerBaseAddr[CONFIG_TIMER0]);
}
Note, you can also use ClockP_usleep() to wait for some time, this internally use one timer that is always setup per CPU to tick at 1ms.
