Diff: targets/TARGET_WIZNET/TARGET_W7500x/i2c_api.c

Revision:

149:156823d33999

Parent:

144:ef7eb2e8f9f7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_WIZNET/TARGET_W7500x/i2c_api.c	Fri Oct 28 11:17:30 2016 +0100
@@ -0,0 +1,182 @@
+/* mbed Microcontroller Library 
+ *******************************************************************************
+ * Copyright (c) 2015 WIZnet Co.,Ltd. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of ARM Limited nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************
+ */
+ 
+#include "mbed_assert.h"
+#include "i2c_api.h"
+
+
+#if DEVICE_I2C
+
+#include "cmsis.h"
+#include "pinmap.h"
+#include "PeripheralPins.h"
+
+#include "wait_api.h"
+#include "us_ticker_api.h"
+#include "W7500x_i2c.h"
+
+/* Timeout values for flags and events waiting loops. These timeouts are
+   not based on accurate values, they just guarantee that the application will
+   not remain stuck if the I2C communication is corrupted. */
+#define FLAG_TIMEOUT ((int)0x1000)
+#define LONG_TIMEOUT ((int)0xFFFF)
+
+
+void i2c_init(i2c_t *obj, PinName sda, PinName scl)
+{
+    I2C_ConfigStruct conf;
+    
+    //Determine the I2C to use
+    I2CName i2c_sda = (I2CName)pinmap_peripheral(sda, PinMap_I2C_SDA);
+    I2CName i2c_scl = (I2CName)pinmap_peripheral(scl, PinMap_I2C_SCL);
+    obj->I2Cx = (I2CName)pinmap_merge(i2c_sda, i2c_scl);
+    MBED_ASSERT(obj->I2Cx != (I2CName)NC);
+    
+    obj->sda = sda;
+    obj->scl = scl;
+    obj->ADDRESS = 0x0;
+    obj->is_setAddress = 0;
+    
+    conf.sda = (I2C_PinName)obj->sda;
+    conf.scl = (I2C_PinName)obj->scl;
+    
+    I2C_Init(&conf);
+}
+
+void i2c_frequency(i2c_t *obj, int hz)
+{
+    
+}
+
+inline int i2c_start(i2c_t *obj)
+{
+    I2C_ConfigStruct conf;
+    conf.sda = (I2C_PinName)obj->sda;
+    conf.scl = (I2C_PinName)obj->scl;
+    
+    I2C_Start(&conf);
+    
+    return 0;
+}
+
+inline int i2c_stop(i2c_t *obj)
+{  
+    I2C_ConfigStruct conf;
+    conf.sda = (I2C_PinName)obj->sda;
+    conf.scl = (I2C_PinName)obj->scl;
+    
+    I2C_Stop(&conf);
+   
+    return 0;
+}
+
+int i2c_read(i2c_t *obj, int address, char *data, int length, int stop)
+{
+    I2C_ConfigStruct conf;
+
+    conf.sda = (I2C_PinName)obj->sda;
+    conf.scl = (I2C_PinName)obj->scl;
+    
+    
+    if(stop)
+    {  
+        if(I2C_Read(&conf, address,  (uint8_t*)data, length) != 0)
+            return -1;
+    }
+    else
+    {
+        if(I2C_ReadRepeated(&conf, address,  (uint8_t*)data, length) != 0)
+            return -1;
+    }
+    
+    return length;
+    
+}
+
+int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop)
+{
+    I2C_ConfigStruct conf;
+    
+    conf.sda = (I2C_PinName)obj->sda;
+    conf.scl = (I2C_PinName)obj->scl;
+    
+    
+    if(stop)
+    {  
+        if(I2C_Write(&conf, address,  (uint8_t*)data, length) != 0)
+           return -1;
+    }
+    else
+    {
+        if(I2C_WriteRepeated(&conf, address,  (uint8_t*)data, length) != 0)
+           return -1;
+    }
+    
+    return length;
+}
+
+int i2c_byte_read(i2c_t *obj, int last)
+{
+    uint8_t ret;
+    I2C_ConfigStruct conf;
+    
+    conf.sda = (I2C_PinName)obj->sda;
+    conf.scl = (I2C_PinName)obj->scl;
+    
+    ret = I2C_ReadByte(&conf);
+    
+    if(last)
+        I2C_SendNACK(&conf);
+    else
+        I2C_SendACK(&conf);
+    
+    return (int)ret;
+}
+
+int i2c_byte_write(i2c_t *obj, int data)
+{
+    I2C_ConfigStruct conf;
+    
+    conf.sda = (I2C_PinName)obj->sda;
+    conf.scl = (I2C_PinName)obj->scl;
+    
+    if(I2C_WriteByte(&conf, (uint8_t)data)) // NACK
+        return 0;
+    else //ack
+        return 1;
+}
+
+void i2c_reset(i2c_t *obj)
+{
+   
+}
+
+
+#endif // DEVICE_I2C