Diff: Memory/BiosEEPROM.cpp

Revision:

17:4ea2509445ac

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Memory/BiosEEPROM.cpp	Wed Jan 07 14:02:39 2015 +0100
@@ -0,0 +1,61 @@
+/*
+ *  Copyright 2014 Embedded Artists AB
+ *
+ *  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.
+ */
+
+#include "mbed.h"
+#include "BiosEEPROM.h"
+
+/******************************************************************************
+ * Defines and typedefs
+ *****************************************************************************/
+
+#define BIOS_EEPROM_ADDR      (0xAC)
+
+
+/******************************************************************************
+ * Local variables
+ *****************************************************************************/
+
+/******************************************************************************
+ * Private Functions
+ *****************************************************************************/
+
+
+/******************************************************************************
+ * Public Functions
+ *****************************************************************************/
+
+BiosEEPROM::BiosEEPROM() : _i2c(P0_27, P0_28)
+{
+    _i2c.frequency(400000);
+}
+
+bool BiosEEPROM::read(uint32_t address, char* data, uint32_t size)
+{
+    bool success = false;
+    do {
+        char buf[2];
+        buf[0] = address >> 8;
+        buf[1] = address & 0xff;
+        
+        if (_i2c.write(BIOS_EEPROM_ADDR, buf, 2) == 0) {
+            if (_i2c.read(BIOS_EEPROM_ADDR, data, size) == 0) {
+                success = true;
+                break;
+            }
+        }
+    } while(false);
+    return success;
+}