/**
* @brief Sets the external interrupt sensitivity of the selected port.
* @note
* - The modification of external interrupt sensitivity is only possible when
* the interrupts are disabled.
* - The normal behavior is to disable the interrupts before calling this
* function, and re-enable them after.
* @param EXTI_Port : The port number to access.
* This parameter can be a value of @ref EXTI_Port_TypeDef
* @param EXTI_Trigger : The external interrupt sensitivity value to set.
* This parameter can be a value of @ref EXTI_Trigger_TypeDef
* @retval None
* @par Required preconditions:
* - Global interrupts must be disabled before calling this function.
*/
void EXTI_SetPortSensitivity(EXTI_Port_TypeDef EXTI_Port, EXTI_Trigger_TypeDef EXTI_Trigger)
{
/* Check function parameters */
assert_param(IS_EXTI_PORT(EXTI_Port));
assert_param(IS_EXTI_TRIGGER(EXTI_Trigger));
/* Clear EXTI port sensitivity */
if (EXTI_Port == EXTI_Port_B)
{
EXTI->CR3 &= (uint8_t)(~EXTI_CR3_PBIS);
}
else if (EXTI_Port == EXTI_Port_D)
{
EXTI->CR3 &= (uint8_t)(~EXTI_CR3_PDIS);
}
else if (EXTI_Port == EXTI_Port_E)
{
EXTI->CR3 &= (uint8_t)(~EXTI_CR3_PEIS);
}
else /* EXTI_Port == EXTI_Port_PF */
{
EXTI->CR3 &= (uint8_t)(~EXTI_CR3_PFIS);
}
/* Write EXTI port sensitivity */
EXTI->CR3 |= (uint8_t)((uint8_t)(EXTI_Trigger) << EXTI_Port);
}
/**
* @brief Gets the external interrupt sensitivity of the selected port.
* @param EXTI_Port : The port number to access.
* This parameter can be a value of @ref EXTI_Port_TypeDef
* @retval EXTI_Trigger_TypeDef : The external interrupt sensitivity of the selected port.
*/
EXTI_Trigger_TypeDef EXTI_GetPortSensitivity(EXTI_Port_TypeDef EXTI_Port)
{
uint8_t value = 0;
uint8_t cr3mask = 0;
/* Check function parameters */
assert_param(IS_EXTI_PORT(EXTI_Port));
if (EXTI_Port == EXTI_Port_B)
{
cr3mask = EXTI_CR3_PBIS;
}
else if (EXTI_Port == EXTI_Port_D)
{
cr3mask = EXTI_CR3_PDIS;
}
else if (EXTI_Port == EXTI_Port_E)
{
cr3mask = EXTI_CR3_PEIS;
}
else
{
cr3mask = EXTI_CR3_PFIS;
}
value = (uint8_t)((uint8_t)(EXTI->CR3 & cr3mask) >> EXTI_Port);
return((EXTI_Trigger_TypeDef)value);
}
/**
* @brief Get the external interrupt sensitivity of the selected port.
* @param EXTI_Port The port number to access.
* This parameter can be any combination of the following values:
* @arg EXTI_Port_B: GPIO Port B
* @arg EXTI_Port_D: GPIO Port D
* @retval EXTI_Trigger_TypeDef The external interrupt sensitivity of the selected port.
*/
EXTI_Trigger_TypeDef EXTI_GetPortSensitivity(EXTI_Port_TypeDef EXTI_Port)
{
uint8_t value = 0;
/* Check function parameters */
assert_param(IS_EXTI_PORT(EXTI_Port));
if (EXTI_Port != EXTI_Port_B)
{
value = (uint8_t)((EXTI->CR3 & EXTI_CR3_PDIS) >> 2);
}
/**
* @brief Gets the external interrupt sensitivity of the selected port.
* @param EXTI_Port : The port number to access.
* This parameter can be a value of @ref EXTI_Port_TypeDef
* @retval EXTI_Trigger_TypeDef : The external interrupt sensitivity of the selected port.
*/
EXTI_Trigger_TypeDef EXTI_GetPortSensitivity(EXTI_Port_TypeDef EXTI_Port)
{
uint8_t portsensitivity = 0;
/* Check function parameters */
assert_param(IS_EXTI_PORT(EXTI_Port));
/* Check if selected port is in EXTI_CR3 */
if ((EXTI_Port & 0xF0) == 0x00)
{
/* Get port sensitivity */
portsensitivity = (uint8_t)((uint8_t)0x03 & (uint8_t)(EXTI->CR3 >> EXTI_Port));
}
/**
* @brief Set the external interrupt sensitivity of the selected port.
* @note The modification of external interrupt sensitivity is only possible
* when the interrupts are disabled.
* @note The normal behavior is to disable the interrupts before calling this
* function, and re-enable them after.
* @note Global interrupts must be disabled before calling this function.
* @param EXTI_Port The port number to access.
* This parameter can be any combination of the following values:
* @arg EXTI_Port_B: GPIO Port B
* @arg EXTI_Port_D: GPIO Port D
* @param EXTI_TriggerValue The external interrupt sensitivity value to set.
* This parameter can be any combination of the following values:
* @arg EXTI_Trigger_Falling_Low: Interrupt on Falling edge and Low level
* @arg EXTI_Trigger_Rising: Interrupt on Rising edge
* @arg EXTI_Trigger_Falling: Interrupt on Falling edge
* @arg EXTI_Trigger_Rising_Falling: Interrupt on Rising and Falling edges
* @retval None
*/
void EXTI_SetPortSensitivity(EXTI_Port_TypeDef EXTI_Port,
EXTI_Trigger_TypeDef EXTI_TriggerValue)
{
/* Check function parameters */
assert_param(IS_EXTI_PORT(EXTI_Port));
assert_param(IS_EXTI_Trigger_VALUE(EXTI_TriggerValue));
/* Clear EXTI port sensitivity */
if (EXTI_Port != EXTI_Port_B)
{
EXTI->CR3 &= (uint8_t)(~EXTI_CR3_PDIS);
}
else /* PortNum == EXTI_Port_B */
{
EXTI->CR3 &= (uint8_t)(~EXTI_CR3_PBIS);
}
/* Write EXTI port sensitivity */
EXTI->CR3 |= (uint8_t)((uint8_t)(EXTI_TriggerValue) << (uint8_t)EXTI_Port);
}
/**
* @brief Sets the external interrupt sensitivity of the selected port.
* @note - Global interrupts must be disabled before calling this function.
* @note - The modification of external interrupt sensitivity is only possible
* when the interrupts are disabled.
* - The normal behavior is to disable the interrupts before calling this
* function, and re-enable them after.
* @param EXTI_Port : The port number to access.
* This parameter can be a value of @ref EXTI_Port_TypeDef
* @param EXTI_Trigger : The external interrupt sensitivity value to set.
* This parameter can be a value of @ref EXTI_Trigger_TypeDef
* @retval None
*/
void EXTI_SetPortSensitivity(EXTI_Port_TypeDef EXTI_Port,
EXTI_Trigger_TypeDef EXTI_Trigger)
{
/* Check function parameters */
assert_param(IS_EXTI_PORT(EXTI_Port));
assert_param(IS_EXTI_TRIGGER(EXTI_Trigger));
/* Ceck if selected port is in EXTI_CR3 register */
if ((EXTI_Port & 0xF0) == 0x00)
{
/* Reset the trigger bits corresponding to EXTI_Port */
EXTI->CR3 &= (uint8_t) (~(uint8_t)((uint8_t)0x03 << EXTI_Port));
/* Write EXTI port trigger */
EXTI->CR3 |= (uint8_t)((uint8_t)(EXTI_Trigger) << EXTI_Port);
}
else /* selected port is in EXTI_CR4 register */
{
/* Reset the trigger bits corresponding to EXTI_Port */
EXTI->CR4 &= (uint8_t) (~(uint8_t)((uint8_t)0x03 << (EXTI_Port & 0x0F)));
/* Write EXTI port trigger */
EXTI->CR4 |= (uint8_t)(EXTI_Trigger << (EXTI_Port & 0x0F));
}
}
/**
* @brief Selects the port interrupt selection.
* @param EXTI_Port : The port number to access.
* This parameter can be a value of @ref EXTI_Port_TypeDef
* @retval None
*/
void EXTI_SelectPort(EXTI_Port_TypeDef EXTI_Port)
{
/* Check function parameter */
assert_param(IS_EXTI_PORT(EXTI_Port));
if (EXTI_Port == EXTI_Port_B)
{
/* Select Port B by resetting PGBS bit in CONF2 register */
EXTI->CONF2 &= (uint8_t) (~EXTI_CONF2_PGBS);
}
else if (EXTI_Port == EXTI_Port_D)
{
/* Select Port D by resetting PHDS bit in CONF2 register */
EXTI->CONF2 &= (uint8_t) (~EXTI_CONF2_PHDS);
}
else if (EXTI_Port == EXTI_Port_E)
{
/* Select Port E by resetting PFES bit in CONF1 register */
EXTI->CONF1 &= (uint8_t) (~EXTI_CONF1_PFES);
}
else if (EXTI_Port == EXTI_Port_F)
{
/* Select Port F by setting PFES bit in CONF1 register */
EXTI->CONF1 |= (uint8_t) (EXTI_CONF1_PFES);
}
else if (EXTI_Port == EXTI_Port_G)
{
/* Select Port G by setting PGBS bit in CONF2 register */
EXTI->CONF2 |= (uint8_t) (EXTI_CONF2_PGBS);
}
else /* EXTI_Port is EXTI_Port_H */
{
/* Select Port H by setting PHDS bit in CONF2 register */
EXTI->CONF2 |= (uint8_t) (EXTI_CONF2_PHDS);
}
}
