/**
* @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 COMP peripheral according to the specified parameters
* in COMP_InitStruct
* @note If the selected comparator is locked, initialization can't be performed.
* To unlock the configuration, perform a system reset.
* @note By default, PA1 is selected as COMP1 non inverting input.
* To use PA4 as COMP1 non inverting input call COMP_SwitchCmd() after COMP_Init()
* @param COMP_Selection: the selected comparator.
* This parameter can be one of the following values:
* @arg COMP_Selection_COMP1: COMP1 selected
* @arg COMP_Selection_COMP2: COMP2 selected
* @param COMP_InitStruct: pointer to an COMP_InitTypeDef structure that contains
* the configuration information for the specified COMP peripheral.
* @retval None
*/
void COMP_Init(uint32_t COMP_Selection, COMP_InitTypeDef* COMP_InitStruct)
{
uint32_t tmpreg = 0;
/* Check the parameters */
assert_param(IS_COMP_ALL_PERIPH(COMP_Selection));
assert_param(IS_COMP_INVERTING_INPUT(COMP_InitStruct->COMP_InvertingInput));
assert_param(IS_COMP_OUTPUT(COMP_InitStruct->COMP_Output));
assert_param(IS_COMP_OUTPUT_POL(COMP_InitStruct->COMP_OutputPol));
assert_param(IS_COMP_HYSTERESIS(COMP_InitStruct->COMP_Hysteresis));
assert_param(IS_COMP_MODE(COMP_InitStruct->COMP_Mode));
/*!< Get the COMP_CSR register value */
tmpreg = COMP->CSR;
/*!< Clear the COMP1SW1, COMPx_IN_SEL, COMPx_OUT_TIM_SEL, COMPx_POL, COMPx_HYST and COMPx_PWR_MODE bits */
tmpreg &= (uint32_t) ~(COMP_CSR_CLEAR_MASK<<COMP_Selection);
/*!< Configure COMP: inverting input, output redirection, hysteresis value and power mode */
/*!< Set COMPxINSEL bits according to COMP_InitStruct->COMP_InvertingInput value */
/*!< Set COMPxOUTSEL bits according to COMP_InitStruct->COMP_Output value */
/*!< Set COMPxPOL bit according to COMP_InitStruct->COMP_OutputPol value */
/*!< Set COMPxHYST bits according to COMP_InitStruct->COMP_Hysteresis value */
/*!< Set COMPxMODE bits according to COMP_InitStruct->COMP_Mode value */
tmpreg |= (uint32_t)((COMP_InitStruct->COMP_InvertingInput | COMP_InitStruct->COMP_Output |
COMP_InitStruct->COMP_OutputPol | COMP_InitStruct->COMP_Hysteresis |
COMP_InitStruct->COMP_Mode)<<COMP_Selection);
/*!< Write to COMP_CSR register */
COMP->CSR = tmpreg;
}
/**
* @brief Initializes the COMP peripheral according to the specified parameters
* in COMP_InitStruct
* @note If the selected comparator is locked, initialization can't be performed.
* To unlock the configuration, perform a system reset.
* @note By default, PA1 is selected as COMP1 non inverting input.
* To use PA4 as COMP1 non inverting input call COMP_SwitchCmd() after COMP_Init()
* @param COMP_Selection: the selected comparator.
* This parameter can be COMP_Selection_COMPx where x can be 1 to 7
* to select the COMP peripheral.
* @param COMP_InitStruct: pointer to an COMP_InitTypeDef structure that contains
* the configuration information for the specified COMP peripheral.
* - COMP_InvertingInput specifies the inverting input of COMP
* - COMP_NonInvertingInput specifies the non inverting input of COMP
* - COMP_Output connect COMP output to selected timer
* input (Input capture / Output Compare Reference Clear / Break Input)
* - COMP_BlankingSrce specifies the blanking source of COMP
* - COMP_OutputPol select output polarity
* - COMP_Hysteresis configures COMP hysteresis value
* - COMP_Mode configures COMP power mode
* @note COMP_Hysteresis must be configured only for STM32F303xC. Otherwise, COMP_Hysteresis
* must be kept at reset value(COMP_Hysteresis_No).
* @note COMP_Mode field is only applicable for STM32F303xC devices.
* @retval None
*/
void COMP_Init(uint32_t COMP_Selection, COMP_InitTypeDef* COMP_InitStruct)
{
uint32_t tmpreg = 0;
/* Check the parameters */
assert_param(IS_COMP_ALL_PERIPH(COMP_Selection));
assert_param(IS_COMP_INVERTING_INPUT(COMP_InitStruct->COMP_InvertingInput));
assert_param(IS_COMP_NONINVERTING_INPUT(COMP_InitStruct->COMP_NonInvertingInput));
assert_param(IS_COMP_OUTPUT(COMP_InitStruct->COMP_Output));
assert_param(IS_COMP_BLANKING_SOURCE(COMP_InitStruct->COMP_BlankingSrce));
assert_param(IS_COMP_OUTPUT_POL(COMP_InitStruct->COMP_OutputPol));
assert_param(IS_COMP_HYSTERESIS(COMP_InitStruct->COMP_Hysteresis));
assert_param(IS_COMP_MODE(COMP_InitStruct->COMP_Mode));
/*!< Get the COMPx_CSR register value */
tmpreg = *(__IO uint32_t *) (COMP_BASE + COMP_Selection);
/*!< Clear the COMP1SW1, COMPxINSEL, COMPxOUTSEL, COMPxPOL, COMPxHYST and COMPxMODE bits */
tmpreg &= (uint32_t) (COMP_CSR_CLEAR_MASK);
/*!< Configure COMP: inverting input, output redirection, hysteresis value and power mode */
/*!< Set COMPxINSEL bits according to COMP_InitStruct->COMP_InvertingInput value */
/*!< Set COMPxNONINSEL bits according to COMP_InitStruct->COMP_NonInvertingInput value */
/*!< Set COMPxBLANKING bits according to COMP_InitStruct->COMP_BlankingSrce value */
/*!< Set COMPxOUTSEL bits according to COMP_InitStruct->COMP_Output value */
/*!< Set COMPxPOL bit according to COMP_InitStruct->COMP_OutputPol value */
/*!< Set COMPxHYST bits according to COMP_InitStruct->COMP_Hysteresis value */
/*!< Set COMPxMODE bits according to COMP_InitStruct->COMP_Mode value */
tmpreg |= (uint32_t)(COMP_InitStruct->COMP_InvertingInput | COMP_InitStruct->COMP_NonInvertingInput |
COMP_InitStruct->COMP_Output | COMP_InitStruct->COMP_OutputPol | COMP_InitStruct->COMP_BlankingSrce |
COMP_InitStruct->COMP_Hysteresis | COMP_InitStruct->COMP_Mode);
/*!< Write to COMPx_CSR register */
*(__IO uint32_t *) (COMP_BASE + COMP_Selection) = tmpreg;
}
/**
* @brief Initialize the COMP peripheral according to the specified
* parameters in the COMP_InitTypeDef and initialize the associated handle.
* @note If the selected comparator is locked, initialization cannot be performed.
* To unlock the configuration, perform a system reset.
* @param hcomp COMP handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_COMP_Init(COMP_HandleTypeDef *hcomp)
{
HAL_StatusTypeDef status = HAL_OK;
/* Check the COMP handle allocation and lock status */
if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET))
{
status = HAL_ERROR;
}
else
{
/* Check the parameters */
assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance));
assert_param(IS_COMP_INVERTINGINPUT(hcomp->Init.InvertingInput));
assert_param(IS_COMP_NONINVERTINGINPUT(hcomp->Init.NonInvertingInput));
assert_param(IS_COMP_NONINVERTINGINPUT_INSTANCE(hcomp->Instance, hcomp->Init.NonInvertingInput));
assert_param(IS_COMP_OUTPUT(hcomp->Init.Output));
assert_param(IS_COMP_OUTPUT_INSTANCE(hcomp->Instance, hcomp->Init.Output));
assert_param(IS_COMP_OUTPUTPOL(hcomp->Init.OutputPol));
assert_param(IS_COMP_HYSTERESIS(hcomp->Init.Hysteresis));
assert_param(IS_COMP_MODE(hcomp->Init.Mode));
assert_param(IS_COMP_BLANKINGSRCE(hcomp->Init.BlankingSrce));
assert_param(IS_COMP_BLANKINGSRCE_INSTANCE(hcomp->Instance, hcomp->Init.BlankingSrce));
assert_param(IS_COMP_TRIGGERMODE(hcomp->Init.TriggerMode));
if(hcomp->Init.WindowMode != COMP_WINDOWMODE_DISABLE)
{
assert_param(IS_COMP_WINDOWMODE_INSTANCE(hcomp->Instance));
assert_param(IS_COMP_WINDOWMODE(hcomp->Init.WindowMode));
}
/* Init SYSCFG and the low level hardware to access comparators */
__HAL_RCC_SYSCFG_CLK_ENABLE();
/* Init the low level hardware : SYSCFG to access comparators */
HAL_COMP_MspInit(hcomp);
if(hcomp->State == HAL_COMP_STATE_RESET)
{
/* Allocate lock resource and initialize it */
hcomp->Lock = HAL_UNLOCKED;
}
/* Set COMP parameters */
/* Set COMPxINSEL bits according to hcomp->Init.InvertingInput value */
/* Set COMPxNONINSEL bits according to hcomp->Init.NonInvertingInput value */
/* Set COMPxBLANKING bits according to hcomp->Init.BlankingSrce value */
/* Set COMPxOUTSEL bits according to hcomp->Init.Output value */
/* Set COMPxPOL bit according to hcomp->Init.OutputPol value */
/* Set COMPxHYST bits according to hcomp->Init.Hysteresis value */
/* Set COMPxMODE bits according to hcomp->Init.Mode value */
COMP_INIT(hcomp);
/* Initialize the COMP state*/
hcomp->State = HAL_COMP_STATE_READY;
}
return status;
}
/**
* @brief Checks whether the specified COMP output is set or not.
* @param COMP_Output Specifies the output to check.
* This parameter can be any combination of the following values:
* @arg COMP_Output_COMP1: COMP1 output
* @arg COMP_Output_COMP2: COMP2 output
* @retval The new state of Output.
*/
FlagStatus COMP_GetOutputStatus(COMP_Output_TypeDef COMP_Output)
{
FlagStatus status = RESET;
/* Check the parameters */
assert_param(IS_COMP_OUTPUT(COMP_Output));
if ((COMP->CSR & (uint8_t)COMP_Output) != 0)
{
status = SET;
}
else
{
status = RESET;
}
return status;
}
/**
* @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;
}
/**
* @brief Initializes the COMP according to the specified
* parameters in the COMP_InitTypeDef and create the associated handle.
* @note If the selected comparator is locked, initialization can't be performed.
* To unlock the configuration, perform a system reset.
* @param hcomp: COMP handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_COMP_Init(COMP_HandleTypeDef *hcomp)
{
HAL_StatusTypeDef status = HAL_OK;
/* Check the COMP handle allocation and lock status */
if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET))
{
status = HAL_ERROR;
}
else
{
/* Check the parameter */
assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance));
if (hcomp->Instance == COMP1)
{
assert_param(IS_COMP_NONINVERTINGINPUTPULL(hcomp->Init.NonInvertingInputPull));
}
else /* if (hcomp->Instance == COMP2) */
{
assert_param(IS_COMP_INVERTINGINPUT(hcomp->Init.InvertingInput));
assert_param(IS_COMP_OUTPUT(hcomp->Init.Output));
assert_param(IS_COMP_MODE(hcomp->Init.Mode));
assert_param(IS_COMP_WINDOWMODE(hcomp->Init.WindowMode));
}
/* In window mode, non-inverting inputs of the 2 comparators are */
/* connected together and are using inputs of COMP2 only. If COMP1 is */
/* selected, this parameter is discarded. */
if ((hcomp->Init.WindowMode == COMP_WINDOWMODE_DISABLE) ||
(hcomp->Instance == COMP2) )
{
assert_param(IS_COMP_NONINVERTINGINPUT(hcomp->Init.NonInvertingInput));
}
/* Enable SYSCFG clock and the low level hardware to access comparators */
if(hcomp->State == HAL_COMP_STATE_RESET)
{
/* Allocate lock resource and initialize it */
hcomp->Lock = HAL_UNLOCKED;
/* Enable SYSCFG clock to control the routing Interface (RI) */
__HAL_RCC_SYSCFG_CLK_ENABLE();
/* Init the low level hardware */
HAL_COMP_MspInit(hcomp);
}
/* Configuration of comparator: */
/* - Output selection */
/* - Inverting input selection */
/* - Window mode */
/* - Mode fast/slow speed */
/* - Inverting input pull-up/down resistors */
/* Configuration depending on comparator instance */
if (hcomp->Instance == COMP1)
{
MODIFY_REG(COMP->CSR, COMP_CSR_400KPD | COMP_CSR_10KPD | COMP_CSR_400KPU | COMP_CSR_10KPU,
hcomp->Init.NonInvertingInputPull );
}
else /* if (hcomp->Instance == COMP2) */
{
/* Note: If comparator 2 is not enabled, inverting input (parameter */
/* "hcomp->Init.InvertingInput") is configured into function */
/* "HAL_COMP_Start()" since inverting input selection also */
/* enables the comparator 2. */
/* If comparator 2 is already enabled, inverting input is */
/* reconfigured on the fly. */
if (__COMP_IS_ENABLED(hcomp) == RESET)
{
MODIFY_REG(COMP->CSR, COMP_CSR_OUTSEL |
COMP_CSR_WNDWE |
COMP_CSR_SPEED ,
hcomp->Init.Output |
hcomp->Init.WindowMode |
hcomp->Init.Mode );
}
else
{
MODIFY_REG(COMP->CSR, COMP_CSR_OUTSEL |
COMP_CSR_INSEL |
COMP_CSR_WNDWE |
COMP_CSR_SPEED ,
hcomp->Init.Output |
hcomp->Init.InvertingInput |
hcomp->Init.WindowMode |
hcomp->Init.Mode );
}
}
/* Configure Routing Interface (RI) switches for comparator non-inverting */
/* input. */
/* Except in 2 cases: */
/* - if non-inverting input has no selection: it can be the case for */
/* COMP1 in window mode. */
/* - particular case for PC3: if switch COMP1_SW1 is closed */
/* (by macro "__HAL_OPAMP_OPAMP3OUT_CONNECT_ADC_COMP1()" or */
/* "__HAL_RI_SWITCH_COMP1_SW1_CLOSE()"), connection between pin PC3 */
/* (or OPAMP3, if available) and COMP1 is done directly, without going */
/* through ADC switch matrix. */
if (__COMP_ROUTING_INTERFACE_TOBECONFIGURED(hcomp))
{
if (hcomp->Instance == COMP1)
{
/* Enable the switch control mode */
__HAL_RI_SWITCHCONTROLMODE_ENABLE();
/* Close the analog switch of ADC switch matrix to COMP1 (ADC */
/* channel 26: Vcomp) */
__HAL_RI_IOSWITCH_CLOSE(RI_IOSWITCH_VCOMP);
}
/* Close the I/O analog switch corresponding to comparator */
/* non-inverting input selected. */
__HAL_RI_IOSWITCH_CLOSE(hcomp->Init.NonInvertingInput);
}
/* Initialize the COMP state*/
if(hcomp->State == HAL_COMP_STATE_RESET)
{
hcomp->State = HAL_COMP_STATE_READY;
}
}
return status;
}
/**
* @brief Initializes the COMP according to the specified
* parameters in the COMP_InitTypeDef and create the associated handle.
* @note If the selected comparator is locked, initialization can't be performed.
* To unlock the configuration, perform a system reset.
* @param hcomp: COMP handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_COMP_Init(COMP_HandleTypeDef *hcomp)
{
HAL_StatusTypeDef status = HAL_OK;
uint32_t regshift = COMP_CSR_COMP1_SHIFT;
/* Check the COMP handle allocation and lock status */
if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET))
{
status = HAL_ERROR;
}
else
{
/* Check the parameter */
assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance));
assert_param(IS_COMP_INVERTINGINPUT(hcomp->Init.InvertingInput));
assert_param(IS_COMP_NONINVERTINGINPUT(hcomp->Init.NonInvertingInput));
assert_param(IS_COMP_OUTPUT(hcomp->Init.Output));
assert_param(IS_COMP_OUTPUTPOL(hcomp->Init.OutputPol));
assert_param(IS_COMP_HYSTERESIS(hcomp->Init.Hysteresis));
assert_param(IS_COMP_MODE(hcomp->Init.Mode));
if(hcomp->Init.NonInvertingInput == COMP_NONINVERTINGINPUT_DAC1SWITCHCLOSED)
{
assert_param(IS_COMP_DAC1SWITCH_INSTANCE(hcomp->Instance));
}
if(hcomp->Init.WindowMode != COMP_WINDOWMODE_DISABLED)
{
assert_param(IS_COMP_WINDOWMODE_INSTANCE(hcomp->Instance));
}
if(hcomp->State == HAL_COMP_STATE_RESET)
{
/* Init SYSCFG and the low level hardware to access comparators */
__SYSCFG_CLK_ENABLE();
HAL_COMP_MspInit(hcomp);
}
/* Set COMP parameters */
/* Set COMPxINSEL bits according to hcomp->Init.InvertingInput value */
/* Set COMPxOUTSEL bits according to hcomp->Init.Output value */
/* Set COMPxPOL bit according to hcomp->Init.OutputPol value */
/* Set COMPxHYST bits according to hcomp->Init.Hysteresis value */
/* Set COMPxMODE bits according to hcomp->Init.Mode value */
if(hcomp->Instance == COMP2)
{
regshift = COMP_CSR_COMP2_SHIFT;
}
MODIFY_REG(COMP->CSR,
(uint32_t)(COMP_CSR_COMPxINSEL | COMP_CSR_COMPxNONINSEL_MASK | \
COMP_CSR_COMPxOUTSEL | COMP_CSR_COMPxPOL | \
COMP_CSR_COMPxHYST | COMP_CSR_COMPxMODE) << regshift,
(hcomp->Init.InvertingInput | \
hcomp->Init.NonInvertingInput | \
hcomp->Init.Output | \
hcomp->Init.OutputPol | \
hcomp->Init.Hysteresis | \
hcomp->Init.Mode) << regshift);
if(hcomp->Init.WindowMode != COMP_WINDOWMODE_DISABLED)
{
COMP->CSR |= COMP_CSR_WNDWEN;
}
/* Initialize the COMP state*/
if(hcomp->State == HAL_COMP_STATE_RESET)
{
hcomp->State = HAL_COMP_STATE_READY;
}
}
return status;
}