Diff: hal/i2c_api.h

Revision:

13:0645d8841f51

Parent:

10:3bc89ef62ce7

Child:

470:07f8455214b5

--- a/hal/i2c_api.h	Wed Jul 24 11:11:21 2013 +0100
+++ b/hal/i2c_api.h	Mon Aug 05 14:12:34 2013 +0300
@@ -1,53 +1,58 @@
-/* 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 MBED_I2C_API_H
-#define MBED_I2C_API_H
-
-#include "device.h"
-
-#if DEVICE_I2C
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef struct i2c_s i2c_t;
-
-void i2c_init         (i2c_t *obj, PinName sda, PinName scl);
-void i2c_frequency    (i2c_t *obj, int hz);
-int  i2c_start        (i2c_t *obj);
-void i2c_stop         (i2c_t *obj);
-int  i2c_read         (i2c_t *obj, int address, char *data, int length, int stop);
-int  i2c_write        (i2c_t *obj, int address, const char *data, int length, int stop);
-void i2c_reset        (i2c_t *obj);
-int  i2c_byte_read    (i2c_t *obj, int last);
-int  i2c_byte_write   (i2c_t *obj, int data);
-
-#if DEVICE_I2CSLAVE
-void i2c_slave_mode   (i2c_t *obj, int enable_slave);
-int  i2c_slave_receive(i2c_t *obj);
-int  i2c_slave_read   (i2c_t *obj, char *data, int length);
-int  i2c_slave_write  (i2c_t *obj, const char *data, int length);
-void i2c_slave_address(i2c_t *obj, int idx, uint32_t address, uint32_t mask);
-#endif
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
-
-#endif
+/* 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 MBED_I2C_API_H
+#define MBED_I2C_API_H
+
+#include "device.h"
+
+#if DEVICE_I2C
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct i2c_s i2c_t;
+
+enum {
+  I2C_ERROR_NO_SLAVE = -1,
+  I2C_ERROR_BUS_BUSY = -2
+};
+
+void i2c_init         (i2c_t *obj, PinName sda, PinName scl);
+void i2c_frequency    (i2c_t *obj, int hz);
+int  i2c_start        (i2c_t *obj);
+int  i2c_stop         (i2c_t *obj);
+int  i2c_read         (i2c_t *obj, int address, char *data, int length, int stop);
+int  i2c_write        (i2c_t *obj, int address, const char *data, int length, int stop);
+void i2c_reset        (i2c_t *obj);
+int  i2c_byte_read    (i2c_t *obj, int last);
+int  i2c_byte_write   (i2c_t *obj, int data);
+
+#if DEVICE_I2CSLAVE
+void i2c_slave_mode   (i2c_t *obj, int enable_slave);
+int  i2c_slave_receive(i2c_t *obj);
+int  i2c_slave_read   (i2c_t *obj, char *data, int length);
+int  i2c_slave_write  (i2c_t *obj, const char *data, int length);
+void i2c_slave_address(i2c_t *obj, int idx, uint32_t address, uint32_t mask);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
+#endif