/**
* @brief Configures and activates the TIMCAP peripheral.
*
* @param[in] timcapp pointer to the @p TIMCAPDriver object
*
* @notapi
*/
void timcap_lld_start(TIMCAPDriver *timcapp) {
uint32_t psc;
const timcapchannel_t tim_max_channel = timcap_get_max_timer_channel(timcapp);
if (timcapp->state == TIMCAP_STOP) {
/* Clock activation and timer reset.*/
#if STM32_TIMCAP_USE_TIM1
if (&TIMCAPD1 == timcapp) {
rccEnableTIM1(FALSE);
rccResetTIM1();
nvicEnableVector(STM32_TIM1_UP_NUMBER, STM32_TIMCAP_TIM1_IRQ_PRIORITY);
nvicEnableVector(STM32_TIM1_CC_NUMBER, STM32_TIMCAP_TIM1_IRQ_PRIORITY);
#if defined(STM32_TIM1CLK)
timcapp->clock = STM32_TIM1CLK;
#else
timcapp->clock = STM32_TIMCLK2;
#endif
}
#endif
#if STM32_TIMCAP_USE_TIM2
if (&TIMCAPD2 == timcapp) {
rccEnableTIM2(FALSE);
rccResetTIM2();
nvicEnableVector(STM32_TIM2_NUMBER, STM32_TIMCAP_TIM2_IRQ_PRIORITY);
timcapp->clock = STM32_TIMCLK1;
}
#endif
#if STM32_TIMCAP_USE_TIM3
if (&TIMCAPD3 == timcapp) {
rccEnableTIM3(FALSE);
rccResetTIM3();
nvicEnableVector(STM32_TIM3_NUMBER, STM32_TIMCAP_TIM3_IRQ_PRIORITY);
timcapp->clock = STM32_TIMCLK1;
}
#endif
#if STM32_TIMCAP_USE_TIM4
if (&TIMCAPD4 == timcapp) {
rccEnableTIM4(FALSE);
rccResetTIM4();
nvicEnableVector(STM32_TIM4_NUMBER, STM32_TIMCAP_TIM4_IRQ_PRIORITY);
timcapp->clock = STM32_TIMCLK1;
}
#endif
#if STM32_TIMCAP_USE_TIM5
if (&TIMCAPD5 == timcapp) {
rccEnableTIM5(FALSE);
rccResetTIM5();
nvicEnableVector(STM32_TIM5_NUMBER, STM32_TIMCAP_TIM5_IRQ_PRIORITY);
timcapp->clock = STM32_TIMCLK1;
}
#endif
#if STM32_TIMCAP_USE_TIM8
if (&TIMCAPD8 == timcapp) {
rccEnableTIM8(FALSE);
rccResetTIM8();
nvicEnableVector(STM32_TIM8_UP_NUMBER, STM32_TIMCAP_TIM8_IRQ_PRIORITY);
nvicEnableVector(STM32_TIM8_CC_NUMBER, STM32_TIMCAP_TIM8_IRQ_PRIORITY);
#if defined(STM32_TIM8CLK)
timcapp->clock = STM32_TIM8CLK;
#else
timcapp->clock = STM32_TIMCLK2;
#endif
}
#endif
#if STM32_TIMCAP_USE_TIM9
if (&TIMCAPD9 == timcapp) {
rccEnableTIM9(FALSE);
rccResetTIM9();
nvicEnableVector(STM32_TIM9_NUMBER, STM32_TIMCAP_TIM9_IRQ_PRIORITY);
timcapp->clock = STM32_TIMCLK1;
}
#endif
}
else {
/* Driver re-configuration scenario, it must be stopped first.*/
timcapp->tim->CR1 = 0; /* Timer disabled. */
timcapp->tim->DIER = timcapp->config->dier &/* DMA-related DIER settings. */
~STM32_TIM_DIER_IRQ_MASK;
timcapp->tim->SR = 0; /* Clear eventual pending IRQs. */
timcapp->tim->CCR[0] = 0; /* Comparator 1 disabled. */
timcapp->tim->CCR[1] = 0; /* Comparator 2 disabled. */
if( tim_max_channel >= TIMCAP_CHANNEL_3 )
timcapp->tim->CCR[2] = 0; /* Comparator 3 disabled. */
if( tim_max_channel >= TIMCAP_CHANNEL_4 )
timcapp->tim->CCR[3] = 0; /* Comparator 4 disabled. */
timcapp->tim->CNT = 0; /* Counter reset to zero. */
}
/* Timer configuration.*/
psc = (timcapp->clock / timcapp->config->frequency) - 1;
osalDbgAssert((psc <= 0xFFFF) &&
((psc + 1) * timcapp->config->frequency) == timcapp->clock,
"invalid frequency");
timcapp->tim->PSC = (uint16_t)psc;
timcapp->tim->ARR = timcap_get_max_arr(timcapp);
timcapp->tim->CCMR1 = 0;
timcapp->tim->CCMR2 = 0;
timcapp->tim->CCER = 0;
timcapchannel_t chan = TIMCAP_CHANNEL_1;
/*go through each non-NULL callback channel and enable the capture register on rising/falling edge*/
for( chan = TIMCAP_CHANNEL_1; chan <= tim_max_channel; chan++ ) {
if( timcapp->config->capture_cb_array[chan] == NULL ) {
continue;
}
switch (chan) {
case TIMCAP_CHANNEL_1:
/*CCMR1_CC1S = 01 = CH1 Input on TI1.*/
timcapp->tim->CCMR1 |= STM32_TIM_CCMR1_CC1S(1);
break;
case TIMCAP_CHANNEL_2:
/*CCMR1_CC2S = 10 = CH2 Input on TI1.*/
timcapp->tim->CCMR1 |= STM32_TIM_CCMR1_CC2S(1);
break;
case TIMCAP_CHANNEL_3:
timcapp->tim->CCMR2 |= STM32_TIM_CCMR2_CC3S(1);
break;
case TIMCAP_CHANNEL_4:
timcapp->tim->CCMR2 |= STM32_TIM_CCMR2_CC4S(1);
break;
}
/* The CCER settings depend on the selected trigger mode.
TIMCAP_INPUT_DISABLED: Input not used.
TIMCAP_INPUT_ACTIVE_HIGH: Active on rising edge, idle on falling edge.
TIMCAP_INPUT_ACTIVE_LOW: Active on falling edge, idle on rising edge.*/
if (timcapp->config->modes[chan] == TIMCAP_INPUT_ACTIVE_HIGH) {
switch (chan) {
case TIMCAP_CHANNEL_1:
timcapp->tim->CCER |= STM32_TIM_CCER_CC1E;
break;
case TIMCAP_CHANNEL_2:
timcapp->tim->CCER |= STM32_TIM_CCER_CC2E;
break;
case TIMCAP_CHANNEL_3:
timcapp->tim->CCER |= STM32_TIM_CCER_CC3E;
break;
case TIMCAP_CHANNEL_4:
timcapp->tim->CCER |= STM32_TIM_CCER_CC4E;
break;
}
}
else if (timcapp->config->modes[chan] == TIMCAP_INPUT_ACTIVE_LOW) {
switch (chan) {
case TIMCAP_CHANNEL_1:
timcapp->tim->CCER |= STM32_TIM_CCER_CC1E | STM32_TIM_CCER_CC1P;
break;
case TIMCAP_CHANNEL_2:
timcapp->tim->CCER |= STM32_TIM_CCER_CC2E | STM32_TIM_CCER_CC2P;
break;
case TIMCAP_CHANNEL_3:
timcapp->tim->CCER |= STM32_TIM_CCER_CC3E | STM32_TIM_CCER_CC3P;
break;
case TIMCAP_CHANNEL_4:
timcapp->tim->CCER |= STM32_TIM_CCER_CC4E | STM32_TIM_CCER_CC4P;
break;
}
}
else {
switch (chan) {
case TIMCAP_CHANNEL_1:
timcapp->tim->CCER &= ~STM32_TIM_CCER_CC1E;
break;
case TIMCAP_CHANNEL_2:
timcapp->tim->CCER &= ~STM32_TIM_CCER_CC2E;
break;
case TIMCAP_CHANNEL_3:
timcapp->tim->CCER &= ~STM32_TIM_CCER_CC3E;
break;
case TIMCAP_CHANNEL_4:
timcapp->tim->CCER &= ~STM32_TIM_CCER_CC4E;
break;
}
}
/* Direct pointers to the capture registers in order to make reading
data faster from within callbacks.*/
timcapp->ccr_p[chan] = &timcapp->tim->CCR[chan];
}
/* SMCR_TS = 101, input is TI1FP1.*/
timcapp->tim->SMCR = STM32_TIM_SMCR_TS(5);
}
/**
* @brief Configures and activates the ICU peripheral.
*
* @param[in] icup pointer to the @p ICUDriver object
*
* @notapi
*/
void icu_lld_start(ICUDriver *icup) {
uint32_t psc;
chDbgAssert((icup->config->channel == ICU_CHANNEL_1) ||
(icup->config->channel == ICU_CHANNEL_2),
"icu_lld_start(), #1", "invalid input");
if (icup->state == ICU_STOP) {
/* Clock activation and timer reset.*/
#if STM32_ICU_USE_TIM1
if (&ICUD1 == icup) {
rccEnableTIM1(FALSE);
rccResetTIM1();
nvicEnableVector(STM32_TIM1_UP_NUMBER,
CORTEX_PRIORITY_MASK(STM32_ICU_TIM1_IRQ_PRIORITY));
nvicEnableVector(STM32_TIM1_CC_NUMBER,
CORTEX_PRIORITY_MASK(STM32_ICU_TIM1_IRQ_PRIORITY));
#if defined(STM32_TIM1CLK)
icup->clock = STM32_TIM1CLK;
#else
icup->clock = STM32_TIMCLK2;
#endif
}
#endif
#if STM32_ICU_USE_TIM2
if (&ICUD2 == icup) {
rccEnableTIM2(FALSE);
rccResetTIM2();
nvicEnableVector(STM32_TIM2_NUMBER,
CORTEX_PRIORITY_MASK(STM32_ICU_TIM2_IRQ_PRIORITY));
icup->clock = STM32_TIMCLK1;
}
#endif
#if STM32_ICU_USE_TIM3
if (&ICUD3 == icup) {
rccEnableTIM3(FALSE);
rccResetTIM3();
nvicEnableVector(STM32_TIM3_NUMBER,
CORTEX_PRIORITY_MASK(STM32_ICU_TIM3_IRQ_PRIORITY));
icup->clock = STM32_TIMCLK1;
}
#endif
#if STM32_ICU_USE_TIM4
if (&ICUD4 == icup) {
rccEnableTIM4(FALSE);
rccResetTIM4();
nvicEnableVector(STM32_TIM4_NUMBER,
CORTEX_PRIORITY_MASK(STM32_ICU_TIM4_IRQ_PRIORITY));
icup->clock = STM32_TIMCLK1;
}
#endif
#if STM32_ICU_USE_TIM5
if (&ICUD5 == icup) {
rccEnableTIM5(FALSE);
rccResetTIM5();
nvicEnableVector(STM32_TIM5_NUMBER,
CORTEX_PRIORITY_MASK(STM32_ICU_TIM5_IRQ_PRIORITY));
icup->clock = STM32_TIMCLK1;
}
#endif
#if STM32_ICU_USE_TIM8
if (&ICUD8 == icup) {
rccEnableTIM8(FALSE);
rccResetTIM8();
nvicEnableVector(STM32_TIM8_UP_NUMBER,
CORTEX_PRIORITY_MASK(STM32_ICU_TIM8_IRQ_PRIORITY));
nvicEnableVector(STM32_TIM8_CC_NUMBER,
CORTEX_PRIORITY_MASK(STM32_ICU_TIM8_IRQ_PRIORITY));
#if defined(STM32_TIM8CLK)
icup->clock = STM32_TIM8CLK;
#else
icup->clock = STM32_TIMCLK2;
#endif
}
#endif
#if STM32_ICU_USE_TIM9
if (&ICUD9 == icup) {
rccEnableTIM9(FALSE);
rccResetTIM9();
nvicEnableVector(STM32_TIM9_NUMBER,
CORTEX_PRIORITY_MASK(STM32_ICU_TIM9_IRQ_PRIORITY));
icup->clock = STM32_TIMCLK2;
}
#endif
}
else {
/* Driver re-configuration scenario, it must be stopped first.*/
icup->tim->CR1 = 0; /* Timer disabled. */
icup->tim->CCR[0] = 0; /* Comparator 1 disabled. */
icup->tim->CCR[1] = 0; /* Comparator 2 disabled. */
icup->tim->CNT = 0; /* Counter reset to zero. */
}
/* Timer configuration.*/
icup->tim->SR = 0; /* Clear eventual pending IRQs. */
icup->tim->DIER = icup->config->dier & /* DMA-related DIER settings. */
~STM32_TIM_DIER_IRQ_MASK;
psc = (icup->clock / icup->config->frequency) - 1;
chDbgAssert((psc <= 0xFFFF) &&
((psc + 1) * icup->config->frequency) == icup->clock,
"icu_lld_start(), #1", "invalid frequency");
icup->tim->PSC = (uint16_t)psc;
icup->tim->ARR = 0xFFFF;
if (icup->config->channel == ICU_CHANNEL_1) {
/* Selected input 1.
CCMR1_CC1S = 01 = CH1 Input on TI1.
CCMR1_CC2S = 10 = CH2 Input on TI1.*/
icup->tim->CCMR1 = STM32_TIM_CCMR1_CC1S(1) | STM32_TIM_CCMR1_CC2S(2);
/* SMCR_TS = 101, input is TI1FP1.
SMCR_SMS = 100, reset on rising edge.*/
icup->tim->SMCR = STM32_TIM_SMCR_TS(5) | STM32_TIM_SMCR_SMS(4);
/* The CCER settings depend on the selected trigger mode.
ICU_INPUT_ACTIVE_HIGH: Active on rising edge, idle on falling edge.
ICU_INPUT_ACTIVE_LOW: Active on falling edge, idle on rising edge.*/
if (icup->config->mode == ICU_INPUT_ACTIVE_HIGH)
icup->tim->CCER = STM32_TIM_CCER_CC1E |
STM32_TIM_CCER_CC2E | STM32_TIM_CCER_CC2P;
else
icup->tim->CCER = STM32_TIM_CCER_CC1E | STM32_TIM_CCER_CC1P |
STM32_TIM_CCER_CC2E;
/* Direct pointers to the capture registers in order to make reading
data faster from within callbacks.*/
icup->wccrp = &icup->tim->CCR[1];
icup->pccrp = &icup->tim->CCR[0];
} else {
/* Selected input 2.
CCMR1_CC1S = 10 = CH1 Input on TI2.
CCMR1_CC2S = 01 = CH2 Input on TI2.*/
icup->tim->CCMR1 = STM32_TIM_CCMR1_CC1S(2) | STM32_TIM_CCMR1_CC2S(1);
/* SMCR_TS = 110, input is TI2FP2.
SMCR_SMS = 100, reset on rising edge.*/
icup->tim->SMCR = STM32_TIM_SMCR_TS(6) | STM32_TIM_SMCR_SMS(4);
/* The CCER settings depend on the selected trigger mode.
ICU_INPUT_ACTIVE_HIGH: Active on rising edge, idle on falling edge.
ICU_INPUT_ACTIVE_LOW: Active on falling edge, idle on rising edge.*/
if (icup->config->mode == ICU_INPUT_ACTIVE_HIGH)
icup->tim->CCER = STM32_TIM_CCER_CC1E | STM32_TIM_CCER_CC1P |
STM32_TIM_CCER_CC2E;
else
icup->tim->CCER = STM32_TIM_CCER_CC1E |
STM32_TIM_CCER_CC2E | STM32_TIM_CCER_CC2P;
/* Direct pointers to the capture registers in order to make reading
data faster from within callbacks.*/
icup->wccrp = &icup->tim->CCR[0];
icup->pccrp = &icup->tim->CCR[1];
}
}
/**
* @brief Starts every channel.
*
* @param[in] eicup Pointer to the @p EICUDriver object
*/
static void start_channels(EICUDriver *eicup) {
/* Set each input channel that is used as: a normal input capture channel,
link the corresponding CCR register and set polarity. */
/* Input capture channel 1 */
if (eicup->config->iccfgp[0] != NULL) {
/* Normal capture input input */
eicup->tim->CCMR1 |= STM32_TIM_CCMR1_CC1S(1);
/* Link CCR register */
eicup->channel[0].ccrp = &eicup->tim->CCR[0];
/* Set input polarity */
if (eicup->config->iccfgp[0]->alvl == EICU_INPUT_ACTIVE_HIGH)
eicup->tim->CCER |= STM32_TIM_CCER_CC1E;
else
eicup->tim->CCER |= STM32_TIM_CCER_CC1E | STM32_TIM_CCER_CC1P;
}
/* Input capture channel 2 */
if (eicup->config->iccfgp[1] != NULL) {
/* Normal capture input input */
eicup->tim->CCMR1 |= STM32_TIM_CCMR1_CC2S(1);
/* Link CCR register */
eicup->channel[1].ccrp = &eicup->tim->CCR[1];
/* Set input polarity */
if (eicup->config->iccfgp[1]->alvl == EICU_INPUT_ACTIVE_HIGH)
eicup->tim->CCER |= STM32_TIM_CCER_CC2E;
else
eicup->tim->CCER |= STM32_TIM_CCER_CC2E | STM32_TIM_CCER_CC2P;
}
/* Input capture channel 3 (not for TIM 9 and 12) */
if (eicup->config->iccfgp[2] != NULL) {
/* Normal capture input input */
eicup->tim->CCMR2 |= STM32_TIM_CCMR2_CC3S(1);
/* Link CCR register */
eicup->channel[2].ccrp = &eicup->tim->CCR[2];
/* Set input polarity */
if (eicup->config->iccfgp[2]->alvl == EICU_INPUT_ACTIVE_HIGH)
eicup->tim->CCER |= STM32_TIM_CCER_CC3E;
else
eicup->tim->CCER |= STM32_TIM_CCER_CC3E | STM32_TIM_CCER_CC3P;
}
/* Input capture channel 4 (not for TIM 9 and 12) */
if (eicup->config->iccfgp[3] != NULL) {
/* Normal capture input input */
eicup->tim->CCMR2 |= STM32_TIM_CCMR2_CC4S(1);
/* Link CCR register */
eicup->channel[3].ccrp = &eicup->tim->CCR[3];
/* Set input polarity */
if (eicup->config->iccfgp[3]->alvl == EICU_INPUT_ACTIVE_HIGH)
eicup->tim->CCER |= STM32_TIM_CCER_CC4E;
else
eicup->tim->CCER |= STM32_TIM_CCER_CC4E | STM32_TIM_CCER_CC4P;
}
}
