Hi,
I have implemented a timer interrupt and the receive SCI interrupt, it has a 4MHz external oscillator and the watchdog is disable.
The timer interrupt is configured to jump every 10uSeg, with the prescaler in 2 and MOD = 0x10. Into this interrupt I point to a function where I count up to 3906 to has an approximate time of 500mSeg or to 1953 to has the middle of that time, then I just toogle a led.
void Timer_Init(void){ MTIMCLK_CLKS0 = 0; //Clock Source : BUSCLK MTIMCLK_CLKS1 = 0; MTIMCLK_PS0 = 1; //Prescaler: %32 MTIMCLK_PS1 = 0; MTIMCLK_PS2 = 1; MTIMCLK_PS3 = 0; MTIMMOD = 0x07; MTIMSC_TOIE = 1; //Habilitamos Interrupción MTIMSC_TSTP = 1; //Timer OFF RegOnTimerLedsISR(ParpadeoLeds); } /**********************************/ /* Frequency of the leds */ /**********************************/ void ParpadeoLeds(void) { static unsigned int mushintIndice = 0; mushintIndice++; if ( (guchParpaLed == LED_OFF) && (mushintIndice == 3906) ) // slow blink { Flash_Led_Activity; // toggle led mushintIndice = 0; }else if ( (guchParpaLed == LED_ON) && (mushintIndice == 1953) ) // fast blink { Flash_Led_Activity; //toggle led mushintIndice = 0; } } /************************************************************/ /* Registro del puntero a función del Timer en la ISR */ /************************************************************/ void RegOnTimerLedsISR(ptrInterruptTimer ptrTimer) { ptrTimerISR = ptrTimer; } Pragma TRAP_PROC void Timer_ISR(void) { MTIMSC_TOF = 0; //Borramos la bandera MTIMSC_TOIE = 1; //Habilitamos la Interrupción if(ptrTimerISR) ptrTimerISR(); } // if(ptrRecepcionBytesSCI) // ptrRecepcionBytesSCI(); }
The SCI interrupt is working at 9600 baud, once I receive a char from the serial it activate a state machine (switch-case).
Problem: When I received a char the timer interrupt stop working and the microcontroller hang.
I attached a video.
All yours reply help me to much.
Thanks in advance.
Best regards,
Carlos.
