/**
* @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 Initialize the COMP according to the specified
* parameters in the COMP_InitTypeDef and initialize 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)
{
uint32_t tmpcsr = 0;
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_OUTPUTPOL(hcomp->Init.OutputPol));
assert_param(IS_COMP_MODE(hcomp->Init.Mode));
assert_param(IS_COMP_HYSTERESIS(hcomp->Init.Hysteresis));
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;
}
/* Change COMP peripheral state */
hcomp->State = HAL_COMP_STATE_BUSY;
/* Set COMP parameters */
/* Set INMSEL bits according to hcomp->Init.InvertingInput value */
/* Set INPSEL bits according to hcomp->Init.NonInvertingInput value */
/* Set BLANKING bits according to hcomp->Init.BlankingSrce value */
/* Set HYST bits according to hcomp->Init.Hysteresis value */
/* Set POLARITY bit according to hcomp->Init.OutputPol value */
/* Set POWERMODE bits according to hcomp->Init.Mode value */
/* Set WINMODE bit according to hcomp->Init.WindowMode value */
tmpcsr = hcomp->Init.InvertingInput | \
hcomp->Init.NonInvertingInput | \
hcomp->Init.BlankingSrce | \
hcomp->Init.Hysteresis | \
hcomp->Init.OutputPol | \
hcomp->Init.Mode | \
hcomp->Init.WindowMode;
/* Check VREFINT use for NonInvertingInput */
if(hcomp->Init.InvertingInput == COMP_INVERTINGINPUT_VREFINT)
{
/* Enable voltage scaler to output VREFINT */
tmpcsr |= COMP_CSR_SCALEN;
}
else
{
if((hcomp->Init.InvertingInput == COMP_INVERTINGINPUT_1_4VREFINT) ||
(hcomp->Init.InvertingInput == COMP_INVERTINGINPUT_1_2VREFINT) ||
(hcomp->Init.InvertingInput == COMP_INVERTINGINPUT_3_4VREFINT))
{
/* Enable voltage & bandgap scaler to output VREFINT */
tmpcsr |= (COMP_CSR_BRGEN | COMP_CSR_SCALEN);
}
}
MODIFY_REG(hcomp->Instance->CSR, COMP_CSR_UPDATE_PARAMETERS_MASK, tmpcsr);
/* Initialize the COMP state*/
hcomp->State = HAL_COMP_STATE_READY;
}
return status;
}
