Diff: targets/hal/TARGET_Atmel/TARGET_SAM21/drivers/extint/extint_callback.c

Revision:

613:bc40b8d2aec4

Parent:

612:fba1c7dc54c0

Child:

614:9d86c2ae5de0

--- a/targets/hal/TARGET_Atmel/TARGET_SAM21/drivers/extint/extint_callback.c	Tue Aug 18 15:00:09 2015 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,185 +0,0 @@
-#include "extint.h"
-#include "extint_callback.h"
-
-/**
- * \internal
- * Internal driver device instance struct, declared in the main module driver.
- */
-extern struct _extint_module _extint_dev;
-
-/**
- * \internal
- * This is the number of the channel whose callback is currently running
- */
-uint8_t _current_channel;
-
-/**
- * \brief Registers an asynchronous callback function with the driver.
- *
- * Registers an asynchronous callback with the EXTINT driver, fired when a
- * channel detects the configured channel detection criteria
- * (e.g. edge or level). Callbacks are fired once for each detected channel.
- *
- * \note NMI channel callbacks cannot be registered via this function; the
- *       device's NMI interrupt should be hooked directly in the user
- *       application and the NMI flags manually cleared via
- *       \ref extint_nmi_clear_detected().
- *
- * \param[in] callback  Pointer to the callback function to register
- * \param[in] channel   Logical channel to register callback for
- * \param[in] type      Type of callback function to register
- *
- * \return Status of the registration operation.
- * \retval STATUS_OK               The callback was registered successfully
- * \retval STATUS_ERR_INVALID_ARG  If an invalid callback type was supplied
- * \retval STATUS_ERR_ALREADY_INITIALIZED    Callback function has been
- *                                  registered, need unregister first
- */
-enum status_code extint_register_callback(
-    const extint_callback_t callback,
-    const uint8_t channel,
-    const enum extint_callback_type type)
-{
-    /* Sanity check arguments */
-    Assert(callback);
-
-    if (type != EXTINT_CALLBACK_TYPE_DETECT) {
-        Assert(false);
-        return STATUS_ERR_INVALID_ARG;
-    }
-
-    if (_extint_dev.callbacks[channel] == NULL) {
-        _extint_dev.callbacks[channel] = callback;
-        return STATUS_OK;
-    } else if (_extint_dev.callbacks[channel] == callback) {
-        return STATUS_OK;
-    }
-
-    return STATUS_ERR_ALREADY_INITIALIZED;
-}
-
-/**
- * \brief Unregisters an asynchronous callback function with the driver.
- *
- * Unregisters an asynchronous callback with the EXTINT driver, removing it
- * from the internal callback registration table.
- *
- * \param[in] callback  Pointer to the callback function to unregister
- * \param[in] channel   Logical channel to unregister callback for
- * \param[in] type      Type of callback function to unregister
- *
- * \return Status of the de-registration operation.
- * \retval STATUS_OK               The callback was Unregistered successfully
- * \retval STATUS_ERR_INVALID_ARG  If an invalid callback type was supplied
- * \retval STATUS_ERR_BAD_ADDRESS  No matching entry was found in the
- *                                 registration table
- */
-enum status_code extint_unregister_callback(
-    const extint_callback_t callback,
-    const uint8_t channel,
-    const enum extint_callback_type type)
-{
-    /* Sanity check arguments */
-    Assert(callback);
-
-    if (type != EXTINT_CALLBACK_TYPE_DETECT) {
-        Assert(false);
-        return STATUS_ERR_INVALID_ARG;
-    }
-
-    if (_extint_dev.callbacks[channel] == callback) {
-        _extint_dev.callbacks[channel] = NULL;
-        return STATUS_OK;
-    }
-
-    return STATUS_ERR_BAD_ADDRESS;
-}
-
-/**
- * \brief Enables asynchronous callback generation for a given channel and type.
- *
- * Enables asynchronous callbacks for a given logical external interrupt channel
- * and type. This must be called before an external interrupt channel will
- * generate callback events.
- *
- * \param[in] channel  Logical channel to enable callback generation for
- * \param[in] type     Type of callback function callbacks to enable
- *
- * \return Status of the callback enable operation.
- * \retval STATUS_OK               The callback was enabled successfully
- * \retval STATUS_ERR_INVALID_ARG  If an invalid callback type was supplied
- */
-enum status_code extint_chan_enable_callback(
-    const uint8_t channel,
-    const enum extint_callback_type type)
-{
-    if (type == EXTINT_CALLBACK_TYPE_DETECT) {
-        Eic *const eic = _extint_get_eic_from_channel(channel);
-
-        eic->INTENSET.reg = (1UL << channel);
-    } else {
-        Assert(false);
-        return STATUS_ERR_INVALID_ARG;
-    }
-
-    return STATUS_OK;
-}
-
-/**
- * \brief Disables asynchronous callback generation for a given channel and type.
- *
- * Disables asynchronous callbacks for a given logical external interrupt
- * channel and type.
- *
- * \param[in] channel  Logical channel to disable callback generation for
- * \param[in] type     Type of callback function callbacks to disable
- *
- * \return Status of the callback disable operation.
- * \retval STATUS_OK               The callback was disabled successfully
- * \retval STATUS_ERR_INVALID_ARG  If an invalid callback type was supplied
- */
-enum status_code extint_chan_disable_callback(
-    const uint8_t channel,
-    const enum extint_callback_type type)
-{
-    if (type == EXTINT_CALLBACK_TYPE_DETECT) {
-        Eic *const eic = _extint_get_eic_from_channel(channel);
-
-        eic->INTENCLR.reg = (1UL << channel);
-    } else {
-        Assert(false);
-        return STATUS_ERR_INVALID_ARG;
-    }
-
-    return STATUS_OK;
-}
-
-/**
- * \brief Find what channel caused the callback.
- *
- * Can be used in an EXTINT callback function to find what channel caused
- * the callback in case same callback is used by multiple channels.
- *
- * \return Channel number.
- */
-uint8_t extint_get_current_channel(void)
-{
-    return _current_channel;
-}
-
-/** Handler for the EXTINT hardware module interrupt. */
-void EIC_Handler(void)
-{
-    /* Find any triggered channels, run associated callback handlers */
-    for (_current_channel = 0; _current_channel < EIC_NUMBER_OF_INTERRUPTS ; _current_channel++) {
-        if (extint_chan_is_detected(_current_channel)) {
-            /* Clear flag */
-            extint_chan_clear_detected(_current_channel);
-            /* Find any associated callback entries in the callback table */
-            if (_extint_dev.callbacks[_current_channel] != NULL) {
-                /* Run the registered callback */
-                _extint_dev.callbacks[_current_channel]();
-            }
-        }
-    }
-}