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

Revision:

579:53297373a894

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_Atmel/TARGET_SAM21/sercom_dma.h	Wed Jul 01 09:45:11 2015 +0100
@@ -0,0 +1,62 @@
+/* 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.
+ */
+
+#ifndef _SERCOM_DMA_H
+#define _SERCOM_DMA_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <compiler.h>
+#include "dma.h"
+
+
+struct sercom_dma {
+    uint8_t tx_channel_id;
+    uint8_t rx_channel_id;
+    enum dma_status_flags tx_status;
+    enum dma_status_flags rx_status;
+};
+
+/** 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);
+
+/** 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);
+
+/** Release DMA channels if allocated
+ *
+ * @param[in] sercom_index	index of sercom instance
+ * @return void
+ */
+void sercom_release_channel(uint8_t sercom_index);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SERCOM_DMA_H */
\ No newline at end of file