Struct stm32g4::stm32g431::crs::isr::R

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pub struct R(_);

Expand description

Register ISR reader

Implementations

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impl R

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pub fn syncokf(&self) -> SYNCOKF_R

Bit 0 - SYNC event OK flag This flag is set by hardware when the measured frequency error is smaller than FELIM * 3. This means that either no adjustment of the TRIM value is needed or that an adjustment by one trimming step is enough to compensate the frequency error. An interrupt is generated if the SYNCOKIE bit is set in the CRS_CR register. It is cleared by software by setting the SYNCOKC bit in the CRS_ICR register.

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pub fn syncwarnf(&self) -> SYNCWARNF_R

Bit 1 - SYNC warning flag This flag is set by hardware when the measured frequency error is greater than or equal to FELIM * 3, but smaller than FELIM * 128. This means that to compensate the frequency error, the TRIM value must be adjusted by two steps or more. An interrupt is generated if the SYNCWARNIE bit is set in the CRS_CR register. It is cleared by software by setting the SYNCWARNC bit in the CRS_ICR register.

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pub fn errf(&self) -> ERRF_R

Bit 2 - Error flag This flag is set by hardware in case of any synchronization or trimming error. It is the logical OR of the TRIMOVF, SYNCMISS and SYNCERR bits. An interrupt is generated if the ERRIE bit is set in the CRS_CR register. It is cleared by software in reaction to setting the ERRC bit in the CRS_ICR register, which clears the TRIMOVF, SYNCMISS and SYNCERR bits.

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pub fn esyncf(&self) -> ESYNCF_R

Bit 3 - Expected SYNC flag This flag is set by hardware when the frequency error counter reached a zero value. An interrupt is generated if the ESYNCIE bit is set in the CRS_CR register. It is cleared by software by setting the ESYNCC bit in the CRS_ICR register.

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pub fn syncerr(&self) -> SYNCERR_R

Bit 8 - SYNC error This flag is set by hardware when the SYNC pulse arrives before the ESYNC event and the measured frequency error is greater than or equal to FELIM * 128. This means that the frequency error is too big (internal frequency too low) to be compensated by adjusting the TRIM value, and that some other action should be taken. An interrupt is generated if the ERRIE bit is set in the CRS_CR register. It is cleared by software by setting the ERRC bit in the CRS_ICR register.

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pub fn syncmiss(&self) -> SYNCMISS_R

Bit 9 - SYNC missed This flag is set by hardware when the frequency error counter reached value FELIM * 128 and no SYNC was detected, meaning either that a SYNC pulse was missed or that the frequency error is too big (internal frequency too high) to be compensated by adjusting the TRIM value, and that some other action should be taken. At this point, the frequency error counter is stopped (waiting for a next SYNC) and an interrupt is generated if the ERRIE bit is set in the CRS_CR register. It is cleared by software by setting the ERRC bit in the CRS_ICR register.

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pub fn trimovf(&self) -> TRIMOVF_R

Bit 10 - Trimming overflow or underflow This flag is set by hardware when the automatic trimming tries to over- or under-flow the TRIM value. An interrupt is generated if the ERRIE bit is set in the CRS_CR register. It is cleared by software by setting the ERRC bit in the CRS_ICR register.

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pub fn fedir(&self) -> FEDIR_R

Bit 15 - Frequency error direction FEDIR is the counting direction of the frequency error counter latched in the time of the last SYNC event. It shows whether the actual frequency is below or above the target.

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pub fn fecap(&self) -> FECAP_R

Bits 16:31 - Frequency error capture FECAP is the frequency error counter value latched in the time ofthe last SYNC event. Refer to Section7.3.4: Frequency error evaluation and automatic trimming for more details about FECAP usage.