Diff: mbed/dma_api.h

Revision:

3:78f223d34f36

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed/dma_api.h	Tue Mar 05 02:34:44 2019 +0000
@@ -0,0 +1,45 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2014-2015 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 MBED_DMA_API_H
+#define MBED_DMA_API_H
+
+#include <stdint.h>
+
+#define DMA_ERROR_OUT_OF_CHANNELS (-1)
+
+typedef enum {
+    DMA_USAGE_NEVER,
+    DMA_USAGE_OPPORTUNISTIC,
+    DMA_USAGE_ALWAYS,
+    DMA_USAGE_TEMPORARY_ALLOCATED,
+    DMA_USAGE_ALLOCATED
+} DMAUsage;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void dma_init(void);
+
+int dma_channel_allocate(uint32_t capabilities);
+
+int dma_channel_free(int channelid);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif