Diff: targets/hal/TARGET_Atmel/TARGET_SAM21/drivers/system/interrupt/system_interrupt.c

Revision:

613:bc40b8d2aec4

Parent:

612:fba1c7dc54c0

Child:

614:9d86c2ae5de0

--- a/targets/hal/TARGET_Atmel/TARGET_SAM21/drivers/system/interrupt/system_interrupt.c	Tue Aug 18 15:00:09 2015 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,172 +0,0 @@
-#include "system_interrupt.h"
-
-/**
- * \brief Check if a interrupt line is pending.
- *
- * Checks if the requested interrupt vector is pending.
- *
- * \param[in] vector  Interrupt vector number to check
- *
- * \returns A boolean identifying if the requested interrupt vector is pending.
- *
- * \retval true   Specified interrupt vector is pending
- * \retval false  Specified interrupt vector is not pending
- *
- */
-bool system_interrupt_is_pending(
-    const enum system_interrupt_vector vector)
-{
-    bool result;
-
-    if (vector >= _SYSTEM_INTERRUPT_EXTERNAL_VECTOR_START) {
-        result = ((NVIC->ISPR[0] & (1 << vector)) != 0);
-    } else if (vector == SYSTEM_INTERRUPT_SYSTICK) {
-        result = ((SCB->ICSR & SCB_ICSR_PENDSTSET_Msk) != 0);
-    } else {
-        Assert(false);
-        result = false;
-    }
-
-    return result;
-}
-
-/**
- * \brief Set a interrupt vector as pending.
- *
- * Set the requested interrupt vector as pending (i.e issues a software
- * interrupt request for the specified vector). The software handler will be
- * handled (if enabled) in a priority order based on vector number and
- * configured priority settings.
- *
- * \param[in] vector  Interrupt vector number which is set as pending
- *
- * \returns Status code identifying if the vector was successfully set as
- *          pending.
- *
- * \retval STATUS_OK           If no error was detected
- * \retval STATUS_INVALID_ARG  If an unsupported interrupt vector number was given
- */
-enum status_code system_interrupt_set_pending(
-    const enum system_interrupt_vector vector)
-{
-    enum status_code status = STATUS_OK;
-
-    if (vector >= _SYSTEM_INTERRUPT_EXTERNAL_VECTOR_START) {
-        NVIC->ISPR[0] = (1 << vector);
-    } else if (vector == SYSTEM_INTERRUPT_NON_MASKABLE) {
-        /* Note: Because NMI has highest priority it will be executed
-         * immediately after it has been set pending */
-        SCB->ICSR = SCB_ICSR_NMIPENDSET_Msk;
-    } else if (vector == SYSTEM_INTERRUPT_SYSTICK) {
-        SCB->ICSR = SCB_ICSR_PENDSTSET_Msk;
-    } else {
-        /* The user want to set something unsupported as pending */
-        Assert(false);
-        status = STATUS_ERR_INVALID_ARG;
-    }
-
-    return status;
-}
-
-/**
- * \brief Clear pending interrupt vector.
- *
- * Clear a pending interrupt vector, so the software handler is not executed.
- *
- * \param[in] vector  Interrupt vector number to clear
- *
- * \returns A status code identifying if the interrupt pending state was
- *          successfully cleared.
- *
- * \retval STATUS_OK           If no error was detected
- * \retval STATUS_INVALID_ARG  If an unsupported interrupt vector number was given
- */
-enum status_code system_interrupt_clear_pending(
-    const enum system_interrupt_vector vector)
-{
-    enum status_code status = STATUS_OK;
-
-    if (vector >= _SYSTEM_INTERRUPT_EXTERNAL_VECTOR_START) {
-        NVIC->ICPR[0] = (1 << vector);
-    } else if (vector == SYSTEM_INTERRUPT_NON_MASKABLE) {
-        /* Note: Clearing of NMI pending interrupts does not make sense and is
-         * not supported by the device, as it has the highest priority and will
-         * always be executed at the moment it is set */
-        return STATUS_ERR_INVALID_ARG;
-    } else if (vector == SYSTEM_INTERRUPT_SYSTICK) {
-        SCB->ICSR = SCB_ICSR_PENDSTCLR_Msk;
-    } else {
-        Assert(false);
-        status = STATUS_ERR_INVALID_ARG;
-    }
-
-    return status;
-}
-
-/**
- * \brief Set interrupt vector priority level.
- *
- * Set the priority level of an external interrupt or exception.
- *
- * \param[in] vector          Interrupt vector to change
- * \param[in] priority_level  New vector priority level to set
- *
- * \returns Status code indicating if the priority level of the interrupt was
- *          successfully set.
- *
- * \retval STATUS_OK           If no error was detected
- * \retval STATUS_INVALID_ARG  If an unsupported interrupt vector number was given
- */
-enum status_code system_interrupt_set_priority(
-    const enum system_interrupt_vector vector,
-    const enum system_interrupt_priority_level priority_level)
-{
-    enum status_code status = STATUS_OK;
-
-    if (vector >= _SYSTEM_INTERRUPT_EXTERNAL_VECTOR_START) {
-        uint8_t register_num = vector / 4;
-        uint8_t priority_pos = ((vector % 4) * 8) + (8 - __NVIC_PRIO_BITS);
-
-        NVIC->IP[register_num] =
-            (NVIC->IP[register_num] & ~(0x3 << priority_pos)) |
-            (priority_level << priority_pos);
-
-    } else if (vector == SYSTEM_INTERRUPT_SYSTICK) {
-        SCB->SHP[1] = (priority_level << _SYSTEM_INTERRUPT_SYSTICK_PRI_POS);
-    } else {
-        Assert(false);
-        status = STATUS_ERR_INVALID_ARG;
-    }
-
-    return status;
-}
-
-/**
- * \brief Get interrupt vector priority level.
- *
- * Retrieves the priority level of the requested external interrupt or exception.
- *
- * \param[in] vector  Interrupt vector of which the priority level will be read
- *
- * \return Currently configured interrupt priority level of the given interrupt
- *         vector.
- */
-enum system_interrupt_priority_level system_interrupt_get_priority(
-    const enum system_interrupt_vector vector)
-{
-    uint8_t register_num = vector / 4;
-    uint8_t priority_pos = ((vector % 4) * 8) + (8 - __NVIC_PRIO_BITS);
-
-    enum system_interrupt_priority_level priority = SYSTEM_INTERRUPT_PRIORITY_LEVEL_0;
-
-    if (vector >= 0) {
-        priority = (enum system_interrupt_priority_level)
-                   ((NVIC->IP[register_num] >> priority_pos) & _SYSTEM_INTERRUPT_PRIORITY_MASK);
-    } else if (vector == SYSTEM_INTERRUPT_SYSTICK) {
-        priority = (enum system_interrupt_priority_level)
-                   ((SCB->SHP[1] >> _SYSTEM_INTERRUPT_SYSTICK_PRI_POS) & _SYSTEM_INTERRUPT_PRIORITY_MASK);
-    }
-
-    return priority;
-}
-