Question
Output Compare stay on actual voltage level
I need an output compare trigger output with toggle function, and the start/stop should be on the correct frequency. Start is ok now, Stop I like to stay on the actual volatge level (high or low)
The problem now I face is when I turn off the timer with HAL_TIM_OC_Stop_IT(&htim20, TIM_CHANNEL_1);
then the output Pin goes to sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
and when in this moment the Pin was high, it goes to the low state
it should stay on the actual level on Stop.
I tried to reconfig the Timer in the IRQ but this is not working. Is this possible to do with the OutputCompare?
in the Timer IRQ:
void setStepper_Timer(const uint16_t TimerCounter) {
__HAL_TIM_SetAutoreload(&htim20, TimerCounter);
__HAL_TIM_SetCompare(&htim20, TIM_CHANNEL_1, TimerCounter);
//check if the timer is stopped
if (TIM_CHANNEL_STATE_GET(&htim20, TIM_CHANNEL_1) == HAL_TIM_CHANNEL_STATE_READY) {
__HAL_TIM_SetCounter(&htim20, 0);
/* Generate an update event to reload the Prescaler
and the repetition counter (only for advanced timer) value immediately */
TIM20->EGR = TIM_EGR_UG;
//start the timer
HAL_TIM_OC_Start_IT(&htim20, TIM_CHANNEL_1);
}
}
in the Timer IRQ
void stopStepper_Timer(const bool bStop, const bool bSetState) {
static bool bStopPending = false;
static bool bPinLevel = false;
TIM_OC_InitTypeDef sConfigOC = {0};
//invert the PinLevelState
bPinLevel = !bPinLevel;
if (bSetState) {
bStopPending = bStop;
} else {
if (bStopPending) {
/*
//set the idle state according to the actual Output State on the PIN
if (bPinLevel) {
sConfigOC.OCIdleState = TIM_OCIDLESTATE_SET;
} else {
sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
}
sConfigOC.OCMode = TIM_OCMODE_TOGGLE;
sConfigOC.Pulse = 0;
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
//sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
if (HAL_TIM_OC_ConfigChannel(&htim20, &sConfigOC, TIM_CHANNEL_1) != HAL_OK) {
Error_Handler();
}
*/
HAL_TIM_OC_Stop_IT(&htim20, TIM_CHANNEL_1);
bStopPending = false;
}
}
}/* TIM20 init function */
void MX_TIM20_Init(void) {
TIM_ClockConfigTypeDef sClockSourceConfig = {0};
TIM_MasterConfigTypeDef sMasterConfig = {0};
TIM_OC_InitTypeDef sConfigOC = {0};
TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig = {0};
htim20.Instance = TIM20;
htim20.Init.Prescaler = 149;
htim20.Init.CounterMode = TIM_COUNTERMODE_UP;
htim20.Init.Period = 50000;
htim20.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim20.Init.RepetitionCounter = 0;
htim20.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;
if (HAL_TIM_Base_Init(&htim20) != HAL_OK) {
Error_Handler();
}
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
if (HAL_TIM_ConfigClockSource(&htim20, &sClockSourceConfig) != HAL_OK) {
Error_Handler();
}
if (HAL_TIM_OC_Init(&htim20) != HAL_OK) {
Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterOutputTrigger2 = TIM_TRGO2_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim20, &sMasterConfig) != HAL_OK) {
Error_Handler();
}
sConfigOC.OCMode = TIM_OCMODE_TOGGLE;
sConfigOC.Pulse = 0;
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
if (HAL_TIM_OC_ConfigChannel(&htim20, &sConfigOC, TIM_CHANNEL_1) != HAL_OK) {
Error_Handler();
}
__HAL_TIM_ENABLE_OCxPRELOAD(&htim20, TIM_CHANNEL_1);
sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
sBreakDeadTimeConfig.DeadTime = 0;
sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
sBreakDeadTimeConfig.BreakFilter = 0;
sBreakDeadTimeConfig.BreakAFMode = TIM_BREAK_AFMODE_INPUT;
sBreakDeadTimeConfig.Break2State = TIM_BREAK2_DISABLE;
sBreakDeadTimeConfig.Break2Polarity = TIM_BREAK2POLARITY_HIGH;
sBreakDeadTimeConfig.Break2Filter = 0;
sBreakDeadTimeConfig.Break2AFMode = TIM_BREAK_AFMODE_INPUT;
sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
if (HAL_TIMEx_ConfigBreakDeadTime(&htim20, &sBreakDeadTimeConfig) != HAL_OK) {
Error_Handler();
}
HAL_TIM_MspPostInit(&htim20);
}