Posted on May 17, 2011 at 15:10Oh, problem is solved! Thanks lowpowermcu!
TIM1->EGR is set to 0x01 in
TIM1_DeInit(), but then it is disabled in
TIM1_OC1Init() for some reason. I set it by
TIM1_GenerateEvent(TIM1_EVENTSOURCE_UPDATE) again and now Update Event occurs at the right moment. Here is fixed code:
TIM1_DeInit();
TIM1_TimeBaseInit(0, TIM1_COUNTERMODE_UP, 0xFF, 10
);
TIM1_OC1Init(TIM1_OCMODE_PWM1, TIM1_OUTPUTSTATE_ENABLE, TIM1_OUTPUTNSTATE_DISABLE, 0x7F, TIM1_OCPOLARITY_LOW, TIM1_OCNPOLARITY_LOW, TIM1_OCIDLESTATE_RESET, TIM1_OCNIDLESTATE_RESET
);
TIM1_SelectOnePulseMode(TIM1_OPMODE_SINGLE
);
TIM1_GenerateEvent(TIM1_EVENTSOURCE_UPDATE
);
TIM1_CtrlPWMOutputs(ENABLE
);
TIM1_Cmd(ENABLE
);Hi kadyrov,
Try to generate an update event before enabling counter. Hope that solves.
TIM1_DeInit();
TIM1_TimeBaseInit(0, TIM1_COUNTERMODE_UP, 0xFF, 10
);
TIM1_OC1Init(TIM1_OCMODE_PWM1, TIM1_OUTPUTSTATE_ENABLE, TIM1_OUTPUTNSTATE_DISABLE, 0x7F, TIM1_OCPOLARITY_LOW, TIM1_OCNPOLARITY_LOW, TIM1_OCIDLESTATE_RESET, TIM1_OCNIDLESTATE_RESET
);
TIM1_SelectOnePulseMode(TIM1_OPMODE_SINGLE
);
/* generate update event */
TIM1->EGR |= 0x01; /* or something like that */
TIM1_CtrlPWMOutputs(ENABLE
);
TIM1_Cmd(ENABLE
);
Tell me if it is OK.
Regards,
MCU Lüfter
