Diff: api/I2C.h

Revision:

526:c320967f86b9

Parent:

13:0645d8841f51

Child:

564:536c9fb088a0

--- a/api/I2C.h	Mon Apr 27 09:45:08 2015 +0100
+++ b/api/I2C.h	Tue Apr 28 11:45:12 2015 +0100
@@ -1,5 +1,5 @@
 /* mbed Microcontroller Library
- * Copyright (c) 2006-2013 ARM Limited
+ * Copyright (c) 2006-2015 ARM Limited
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,6 +22,12 @@
 
 #include "i2c_api.h"
 
+#if DEVICE_I2C_ASYNCH
+#include "CThunk.h"
+#include "dma_api.h"
+#include "FunctionPointer.h"
+#endif
+
 namespace mbed {
 
 /** An I2C Master, used for communicating with I2C slave devices
@@ -129,6 +135,32 @@
      */
     void stop(void);
 
+#if DEVICE_I2C_ASYNCH
+
+    /** Start non-blocking I2C transfer.
+     *
+     * @param address   8/10 bit I2c slave address
+     * @param tx_buffer The TX buffer with data to be transfered
+     * @param tx_length The length of TX buffer
+     * @param rx_buffer The RX buffer which is used for received data
+     * @param rx_length The length of RX buffer
+     * @param event     The logical OR of events to modify
+     * @param callback  The event callback function
+     * @param repeated Repeated start, true - do not send stop at end
+     * @return Zero if the transfer has started, or -1 if I2C peripheral is busy
+     */
+    int transfer(int address, char *tx_buffer, int tx_length, char *rx_buffer, int rx_length, const event_callback_t& callback, int event = I2C_EVENT_TRANSFER_COMPLETE, bool repeated = false);
+
+    /** Abort the on-going I2C transfer
+     */
+    void abort_transfer();
+protected:
+    void irq_handler_asynch(void);
+    event_callback_t _callback;
+    CThunk<I2C> _irq;
+    DMAUsage _usage;
+#endif
+
 protected:
     void aquire();