Other Parts Discussed in Thread: SYSCONFIG
Dear Ti team,
Please tell me how to create a 1 second periodic timer.
From example, timx_timer_mode_periodic_standby, Does "DL_Timer_setLoadValue(TIMER_0_INST, count); DL_TimerG_startCounter(TIMER_0_INST);" would create a 500ms periodic timer? What I test looks not like that.
(In my code, I decrease a variable (value = 5*60*2 = 5min) everytime when this timer comes in, but when I run my program the variable becomes to zero very quickly, looks like the timer is very quick, not 500ms per round)
Please help me to clairy this issue.
Thanks!
/* ((32KHz / (32+1)) * 0.5s) = 45 - 1 = 495 due to N+1 ticks */ #define TIMER_500_MILLISECONDS_TICKS (495) /* ((32KHz / (32+1)) * 0.05s) = 50 - 1 = 49 due to N+1 ticks */ #define TIMER_50_MILLISECONDS_TICKS (49) void TIMER_0_INST_IRQHandler(void) { static uint32_t count = TIMER_500_MILLISECONDS_TICKS; switch (DL_TimerG_getPendingInterrupt(TIMER_0_INST)) { case DL_TIMER_IIDX_ZERO: /* * Counter stopped to avoid a conflict with the timer reading * the LOAD value while it's being set */ DL_TimerG_stopCounter(TIMER_0_INST); /* * Count progressively gets smaller in 0.05 s increments until * reset with 0.5s */ if (count > (TIMER_500_MILLISECONDS_TICKS / 5)) { count = count - TIMER_50_MILLISECONDS_TICKS; } else { count = TIMER_500_MILLISECONDS_TICKS; } DL_Timer_setLoadValue(TIMER_0_INST, count); /* * By default, this should load the new count value and count down * from there (CVAE = 0) */ DL_TimerG_startCounter(TIMER_0_INST); DL_GPIO_togglePins(GPIO_LEDS_PORT, (GPIO_LEDS_USER_LED_1_PIN | GPIO_LEDS_USER_TEST_PIN)); break; default: break; } }