80 lines
1.6 KiB
C++
80 lines
1.6 KiB
C++
#include "AT24CXX.h"
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#define AT24C01 127
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#define AT24C02 255
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#define AT24C04 511
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#define AT24C08 1023
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#define AT24C16 2047
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#define AT24C32 4095
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#define AT24C64 8191 //256 Pages of 32 bytes
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#define AT24C128 16383 //256 Pages of 64bytes
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#define AT24C256 32767 //512 Pages of 64bytes
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#define AT24C512 65535 //512 Pages of 128bytes
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#define EE_PAGES 512 //存储器页数目
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#define EE_BYTES 128 //每页字节数目
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#define EE_TYPE AT24C512//存储器型号
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#define EE_TDEA 10 //页延时 ms
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AT24CXX::AT24CXX()
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{
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IIC = NULL;
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// 7位地址，到了I2C那里，需要左移1位
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Address = 0x50;
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}
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AT24CXX::~AT24CXX()
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{
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delete IIC;
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IIC = NULL;
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}
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void AT24CXX::Init()
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{
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debug_printf("\r\nAT24CXX::Init Address=0x%02X \r\n", Address);
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IIC->SubWidth = 1;
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IIC->Address = Address << 1;
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}
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bool AT24CXX::Write(ushort addr, byte data)
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{
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if(!IIC) return false;
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IIC->Address = (Address + (addr >> 8)) << 1;
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return IIC->Write(addr & 0xFF, data);
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}
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byte AT24CXX::Read(ushort addr)
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{
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if(!IIC) return 0;
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IIC->Address = (Address + (addr >> 8)) << 1;
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return IIC->Read(addr & 0xFF);
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}
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bool AT24CXX::Write(uint addr, const Buffer& bs) const
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{
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if(!IIC) return false;
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IIC->Address = Address << 1;
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return IIC->Write((ushort)addr, bs);
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}
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bool AT24CXX::Read(uint addr, Buffer& bs) const
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{
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if(!IIC) return false;
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IIC->Address = Address << 1;
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uint len = IIC->Read((ushort)addr, bs);
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if(len == 0)return false;
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if(len != bs.Length()) bs.SetLength(len);
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return true;
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}
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