/**
* @brief Configures the half port interrupt selection.
* @note - This function should be called once the port sensitivity configured,
* otherwise it will not have any effect on the port external interrupt.
* - This function should be called after EXTI_SelectPort() function which
* selects the port to be used otherwise ports are selected by default
* @param EXTI_HalfPort : The port part to access (MSB or LSB).
* This parameter can be a value of @ref EXTI_HalfPort_TypeDef
* @param NewState : The external interrupt new state.
* This parameter can be a value of @ref FunctionalState.
* @retval None
*/
void EXTI_SetHalfPortSelection(EXTI_HalfPort_TypeDef EXTI_HalfPort,
FunctionalState NewState)
{
/* Check function parameters */
assert_param(IS_EXTI_HALFPORT(EXTI_HalfPort));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if ((EXTI_HalfPort & 0x80) == 0x00)
{
if (NewState != DISABLE)
{
/* Enable port interrupt selector */
EXTI->CONF1 |= (uint8_t)EXTI_HalfPort;
}
else /*NewState == DISABLE */
{
/* Disable port interrupt selector */
EXTI->CONF1 &= (uint8_t)(~(uint8_t)EXTI_HalfPort);
}
}
else
{
if (NewState != DISABLE)
{
/* Enable port interrupt selector */
EXTI->CONF2 |= (uint8_t)(EXTI_HalfPort & (uint8_t)0x7F);
}
else /*NewState == DISABLE */
{
/* Disable port interrupt selector */
EXTI->CONF2 &= (uint8_t)(~(uint8_t) (EXTI_HalfPort & (uint8_t)0x7F));
}
}
}
/**
* @brief Configure the half port interrupt selection.
* @note This function must be called once the port sensitivity is configured,
* otherwise this function call won't have any effect on the port external interrupt.
* @param EXTI_HalfPort The port part to access (MSB or LSB).
* This parameter can be any combination of the following values:
* @arg EXTI_HalfPort_B_LSB: Interrupt selector PB(3:0)
* @arg EXTI_HalfPort_B_MSB: Interrupt selector PB(7:4)
* @arg EXTI_HalfPort_D_LSB: Interrupt selector PE(3:0)
* @arg EXTI_HalfPort_D_MSB: Interrupt selector PE(7:4)
* @param NewState The external interrupt new state.
* @retval None
*/
void EXTI_SetHalfPortSelection(EXTI_HalfPort_TypeDef EXTI_HalfPort,
FunctionalState NewState)
{
/* Check function parameters */
assert_param(IS_EXTI_HALFPORT(EXTI_HalfPort));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
EXTI->CONF |= (uint8_t)EXTI_HalfPort; /* Enable port interrupt selector */
}
else /*NewState == DISABLE */
{
EXTI->CONF &= (uint8_t)(~(uint8_t)EXTI_HalfPort); /* Disable port interrupt selector */
}
}
/**
* @brief Gets the external interrupt half port configuration.
* @param EXTI_HalfPort : The half port part to get (MSB or LSB).
* This parameter can be a value of @ref EXTI_HalfPort_TypeDef
* @retval FunctionalState : The external interrupt state of the selected port part.
* This parameter can be a value of @ref FunctionalState.
*/
FunctionalState EXTI_GetHalfPortSelection(EXTI_HalfPort_TypeDef EXTI_HalfPort)
{
FunctionalState value = DISABLE;
/* Check function parameters */
assert_param(IS_EXTI_HALFPORT(EXTI_HalfPort));
if ((EXTI->CONF1 & (uint8_t)EXTI_HalfPort) != DISABLE)
{
value = ENABLE;
}
else
{
value = DISABLE;
}
return(value);
}
