/**
* @brief Initializes the COMP2 peripheral according to the specified parameters
* in the COMP_InitStruct:
* - COMP_InvertingInput specify the inverting input of COMP2
* - COMP_OutputSelect connect the output of COMP2 to selected timer
* input (Input capture / Output Compare Reference Clear)
* - COMP_Speed configures COMP2 speed for optimum speed/consumption ratio
* @note This function configures only COMP2.
* @note COMP2 comparator is enabled as soon as the INSEL[2:0] bits are
* different from "000".
* @param COMP_InitStruct: pointer to an COMP_InitTypeDef structure that contains
* the configuration information for the specified COMP peripheral.
* @retval None
*/
void COMP_Init(COMP_InitTypeDef* COMP_InitStruct)
{
uint32_t tmpreg = 0;
/* Check the parameters */
assert_param(IS_COMP_INVERTING_INPUT(COMP_InitStruct->COMP_InvertingInput));
assert_param(IS_COMP_OUTPUT(COMP_InitStruct->COMP_OutputSelect));
assert_param(IS_COMP_SPEED(COMP_InitStruct->COMP_Speed));
/*!< Get the COMP CSR value */
tmpreg = COMP->CSR;
/*!< Clear the INSEL[2:0], OUTSEL[1:0] and SPEED bits */
tmpreg &= (uint32_t) (~(uint32_t) (COMP_CSR_OUTSEL | COMP_CSR_INSEL | COMP_CSR_SPEED));
/*!< Configure COMP: speed, inversion input selection and output redirection */
/*!< Set SPEED bit according to COMP_InitStruct->COMP_Speed value */
/*!< Set INSEL bits according to COMP_InitStruct->COMP_InvertingInput value */
/*!< Set OUTSEL bits according to COMP_InitStruct->COMP_OutputSelect value */
tmpreg |= (uint32_t)((COMP_InitStruct->COMP_Speed | COMP_InitStruct->COMP_InvertingInput
| COMP_InitStruct->COMP_OutputSelect));
/*!< The COMP2 comparator is enabled as soon as the INSEL[2:0] bits value are
different from "000" */
/*!< Write to COMP_CSR register */
COMP->CSR = tmpreg;
}
/**
* @brief Initializes the comparator inverting input, output and speed.
* @note This function configures only COMP2.
* @param COMP_InvertingInput : selects the comparator inverting input.
* This parameter can be one of the following values:
* @arg COMP_InvertingInput_IO: Input/Output on comparator inverting input enable
* @arg COMP_InvertingInput_VREFINT: VREFINT on comparator inverting input enable
* @arg COMP_InvertingInput_3_4VREFINT: 3/4 VREFINT on comparator inverting input enable
* @arg COMP_InvertingInput_1_2VREFINT: 1/2 VREFINT on comparator inverting input enable
* @arg COMP_InvertingInput_1_4VREFINT: 1/4 VREFINT on comparator inverting input enable
* @arg COMP_InvertingInput_DAC1: DAC1 output on comparator inverting input enable
* @arg COMP_InvertingInput_DAC2: DAC2 output on comparator inverting input enable
* @param COMP_OutputSelect : selects the comparator output
* This parameter can be one of the following values:
* @arg COMP_OutputSelect_TIM2IC2: COMP2 output connected to TIM2 Input Capture 2
* @arg COMP_OutputSelect_TIM3IC2: COMP2 output connected to TIM3 Input Capture 2
* @arg COMP_OutputSelect_TIM1BRK: COMP2 output connected to TIM1 Break Input
* @arg COMP_OutputSelect_TIM1OCREFCLR: COMP2 output connected to TIM1 OCREF Clear
* @param COMP_Speed selects the comparator speed
* This parameter can be one of the following values:
* @arg COMP_Speed_Slow: Comparator speed: slow
* @arg COMP_Speed_Fast: Comparator speed: fast
* @retval None.
*/
void COMP_Init(COMP_InvertingInput_Typedef COMP_InvertingInput,
COMP_OutputSelect_Typedef COMP_OutputSelect, COMP_Speed_TypeDef COMP_Speed)
{
/* Check the parameters */
assert_param(IS_COMP_INVERTING_INPUT(COMP_InvertingInput));
assert_param(IS_COMP_OUTPUT(COMP_OutputSelect));
assert_param(IS_COMP_SPEED(COMP_Speed));
/* Reset the INSEL[2:0] bits in CSR3 register */
COMP->CSR3 &= (uint8_t) (~COMP_CSR3_INSEL);
/* Select the comparator inverting input */
COMP->CSR3 |= (uint8_t) COMP_InvertingInput;
/* Reset the OUTSEL[1:0] bits in CSR3 register */
COMP->CSR3 &= (uint8_t) (~COMP_CSR3_OUTSEL);
/* Redirect the comparator output */
COMP->CSR3 |= (uint8_t) COMP_OutputSelect;
/* Reset the comparator speed bit */
COMP->CSR2 &= (uint8_t) (~COMP_CSR2_SPEED);
/* Select the comparator speed */
COMP->CSR2 |= (uint8_t) COMP_Speed;
}
