STM8S/A Standard Peripherals Drivers: BEEP_Public_Functions

Enable or disable the BEEP function.

Parameters:

NewState

Indicates the new state of the BEEP function.

Return values:

None

Required preconditions:

Initialisation of BEEP and LS RC calibration must be done before.

Definition at line 91 of file stm8s_beep.c.

References BEEP, BEEP_CSR_BEEPEN, and DISABLE.

Deinitializes the BEEP peripheral registers to their default reset values.

Parameters:

None

Return values:

None

Definition at line 54 of file stm8s_beep.c.

References BEEP, and BEEP_CSR_RESET_VALUE.

Initializes the BEEP function according to the specified parameters.

Parameters:

BEEP_Frequency

Frequency selection. can be one of the values of BEEP_Frequency_TypeDef.

Return values:

None

Required preconditions:

The LS RC calibration must be performed before calling this function.

Definition at line 67 of file stm8s_beep.c.

References BEEP, BEEP_CALIBRATION_DEFAULT, BEEP_CSR_BEEPDIV, BEEP_CSR_BEEPSEL, and IS_BEEP_FREQUENCY_OK.

Update CSR register with the measured LSI frequency.

Note on the APR calculation:

A is the integer part of LSIFreqkHz/4 and x the decimal part. x <= A/(1+2A) is equivalent to A >= x(1+2A) and also to 4A >= 4x(1+2A) [F1] but we know that A + x = LSIFreqkHz/4 ==> 4x = LSIFreqkHz-4A so [F1] can be written : 4A >= (LSIFreqkHz-4A)(1+2A)

Parameters:

LSIFreqHz

Low Speed RC frequency measured by timer (in Hz).

Return values:

None

Required preconditions:

• BEEP must be disabled to avoid unwanted interrupts.

Definition at line 118 of file stm8s_beep.c.

References BEEP, BEEP_CSR_BEEPDIV, and IS_LSI_FREQUENCY_OK.