Diff: targets/hal/TARGET_Atmel/TARGET_SAM21/sercom_dma.c

Revision:

613:bc40b8d2aec4

Parent:

612:fba1c7dc54c0

Child:

614:9d86c2ae5de0

--- a/targets/hal/TARGET_Atmel/TARGET_SAM21/sercom_dma.c	Tue Aug 18 15:00:09 2015 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,95 +0,0 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2006-2013 ARM Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#include "mbed_assert.h"
-#include "system.h"
-
-#include <math.h>
-
-#include "cmsis.h"
-#include "pinmap.h"
-#include "sercom.h"
-#include "dma_api.h"
-#include "dma_api_HAL.h"
-#include "sercom_dma.h"
-
-static struct sercom_dma sercom_channels[SERCOM_INST_NUM] = {{0}};
-
-/** Allocate a channel for TX
- *
- * @param[in] sercom_index	index of sercom instance
- * @param[out] tx_id		pointer to channel id
- * @return allocated channel id
- */
-uint8_t sercom_setup_tx_channel(uint8_t sercom_index, uint8_t *tx_id)
-{
-    if (sercom_channels[sercom_index].tx_status & DMA_ALLOCATED) {
-        *tx_id = sercom_channels[sercom_index].tx_channel_id;
-    } else {
-        /* Try to allocate a channel */
-        sercom_channels[sercom_index].tx_channel_id = dma_channel_allocate(DMA_CAP_NONE);
-        if (sercom_channels[sercom_index].tx_channel_id != (uint8_t)DMA_ERROR_OUT_OF_CHANNELS) {
-            *tx_id = sercom_channels[sercom_index].tx_channel_id;
-            sercom_channels[sercom_index].tx_status = DMA_ALLOCATED;
-        } else {
-            /* Couldn't find a channel */
-            return DMA_ERROR_OUT_OF_CHANNELS;
-        }
-    }
-    return *tx_id;
-}
-
-/** Allocate a channel for RX
- *
- * @param[in] sercom_index	index of sercom instance
- * @param[out] rx_id		pointer to channel id
- * @return allocated channel id
- */
-uint8_t sercom_setup_rx_channel(uint8_t sercom_index, uint8_t *rx_id)
-{
-    if (sercom_channels[sercom_index].rx_status & DMA_ALLOCATED) {
-        *rx_id = sercom_channels[sercom_index].rx_channel_id;
-    } else {
-        /* Try to allocate a channel */
-        sercom_channels[sercom_index].rx_channel_id = dma_channel_allocate(DMA_CAP_NONE);
-        if (sercom_channels[sercom_index].rx_channel_id != (uint8_t)DMA_ERROR_OUT_OF_CHANNELS) {
-            *rx_id = sercom_channels[sercom_index].rx_channel_id;
-            sercom_channels[sercom_index].rx_status = DMA_ALLOCATED;
-        } else {
-            /* Couldn't find a channel */
-            return DMA_ERROR_OUT_OF_CHANNELS;
-        }
-    }
-    return *rx_id;
-}
-
-/** Release DMA channels if allocated
- *
- * @param[in] sercom_index	index of sercom instance
- * @return void
- */
-void sercom_release_channel(uint8_t sercom_index)
-{
-    if (sercom_channels[sercom_index].rx_status & DMA_ALLOCATED) {
-        if (0 == dma_channel_free(sercom_channels[sercom_index].rx_channel_id)) {
-            sercom_channels[sercom_index].rx_status = DMA_NOT_USED;
-        }
-    }
-    if (sercom_channels[sercom_index].tx_status & DMA_ALLOCATED) {
-        if (0 == dma_channel_free(sercom_channels[sercom_index].tx_channel_id)) {
-            sercom_channels[sercom_index].tx_status = DMA_NOT_USED;
-        }
-    }
-}