Diff: Mem24LCXX.cpp

Revision:

1:b23f5561266c

Parent:

0:f275a33797f1

--- a/Mem24LCXX.cpp	Sat Jun 27 13:03:49 2015 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,170 +0,0 @@
-/* Simple access class for Microchip 24LC EEPROM chips library
- * Copyright (c) 2015 Robin Hourahane
- *
- * 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 "Mem24LCXX.h"
-
-const int PageSize = 64;
-
-Mem24LCXX::Mem24LCXX(PinName sda, PinName scl, int address, size_t chipSize, int busSpeed):
-    m_i2c(sda, scl),
-    m_i2cAddress(address),
-    m_chipSize(chipSize)
-{
-    m_i2c.frequency(busSpeed);
-}
-
-size_t Mem24LCXX::read(size_t address, char &value) {
-    if (!checkSpace(address, 1))
-        return 0;
-        
-    char values[] = { (address >> 8), (address & 0xFF) };
-    if (m_i2c.write(m_i2cAddress, values, 2) == 0) {
-        if (m_i2c.read(m_i2cAddress, &value, 1) == 0) {
-            return 1;
-        }
-    }
-    
-    return 0;
-}
-
-size_t Mem24LCXX::read(size_t address, char *buffer, size_t size) {
-    if (!checkSpace(address, size))
-        return 0;
-        
-    char values[] = { (address >> 8), (address & 0xFF) };
-    if (m_i2c.write(m_i2cAddress, values, 2) == 0) {
-        if (m_i2c.read(m_i2cAddress, buffer, size) == 0) {
-            return size;
-        }
-    }
-    
-    return 0;
-}
-
-size_t Mem24LCXX::write(size_t address, char value) {
-    if (!checkSpace(address, 1))
-        return 0;
-        
-    char values[] = { (address >> 8), (address & 0xFF), value };
-    if (m_i2c.write(m_i2cAddress, values, 3) != 0) {
-        return 0;
-    }
-    
-    waitForWrite();
-    
-    return 1;
-}
-
-size_t Mem24LCXX::write(size_t address, const char *buffer, size_t size) {
-    if (!checkSpace(address, size))
-        return 0;
-        
-    const char *page = buffer;
-    size_t left = size;
-    
-    while (left != 0) {
-        size_t toWrite;
-        if ((address % PageSize) != 0) {
-            toWrite = (((address / PageSize) + 1) * 64) - address;
-            if (toWrite > size) {
-                toWrite = size;
-            }
-        } else {
-            if (left <= PageSize) {
-                toWrite = left;
-            } else {
-                toWrite = PageSize;
-            }
-        }
-        
-        printf("Writing [%.*s] at %d size %d\n\r", toWrite, page, address, toWrite);
-        char values[] = { (address >> 8), (address & 0xFF) };
-        if (m_i2c.write(m_i2cAddress, values, 2, true) != 0) {
-            return size - left;
-        }
-        
-        for (int count = 0; count != toWrite; ++count) {
-            if (m_i2c.write(*page) == 0) {
-                return size - left;
-            }
-            ++page;
-        }
-        
-        m_i2c.stop();
-        
-        waitForWrite();
-        
-        left -= toWrite;
-        address += toWrite;
-    }
-    return size;
-}
-
-size_t Mem24LCXX::fill(size_t address, char value, size_t size) {
-    if (!checkSpace(address, size))
-        return 0;
-        
-    size_t left = size;
-    
-    while (left != 0) {
-        size_t toWrite;
-        if ((address % PageSize) != 0) {
-            toWrite = (((address / PageSize) + 1) * 64) - address;
-            if (toWrite > size) {
-                toWrite = size;
-            }
-        } else {
-            if (left <= PageSize) {
-                toWrite = left;
-            } else {
-                toWrite = PageSize;
-            }
-        }
-        
-        printf("Writing %d at %d size %d\n\r", value, address, toWrite);
-        char values[] = { (address >> 8), (address & 0xFF) };
-        if (m_i2c.write(m_i2cAddress, values, 2, true) != 0) {
-            return size - left;
-        }
-        
-        for (int count = 0; count != toWrite; ++count) {
-            if (m_i2c.write(value) == 0)
-                return size - left;
-        }
-        
-        m_i2c.stop();
-        
-        waitForWrite();
-        
-        left -= toWrite;
-        address += toWrite;
-    }
-    return true;
-}
-
-void Mem24LCXX::waitForWrite() {
-    while (m_i2c.write(m_i2cAddress, 0, 0) != 0) {
-        // Wait for ack.
-        wait_ms(1);
-    }
-}
-
-bool Mem24LCXX::checkSpace(size_t address, size_t size) {
-    if ((address >= m_chipSize) || ((address + size) >= m_chipSize))
-        return false;
-    else
-        return true;
-}
-