Keil C函数库

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1、KeilC函数库一、绝对地址宏指令：绝对地址宏指令：使用#include1、CBYTE[address]说明：在程序内存里，读取一个字节的内容。自变量：程序内存的地址。定义：#defineCBYTE((unsignedcharvolatilecode*)0)例1：#includevoidmain(void){charva1=0;//readprogrammemoryataddress0x0002va1=CBYTE[0x0002];}2、CWORD[address]说明：在程序内存里，读取一个字节的内容。自变量：程序内存的地址。定义：#def

2、ineCWORD((unsignedintvolatilecode*)0)例2：#includevoidmain(void){charva1=0;//readprogrammemoryataddress0x0020va1=CWORD[0x0010];}3、DBYTE[address]说明：在8051内部数据存储器里，读取一个字节的内容。自变量：内部数据存储器的地址(0~0xff)。定义：#defineDBYTE((unsignedcharvolatiledata*)0)例3：#includevoidIRamSet(unsignedcharv

3、alue);voidmain(void){charva1=0;//cpuinternalramwritedata0xaaIRamSet(0xaa);//readcpuinternaldataataddress0x0032va1=DBYTE[0x0032];//writedataataddress0x0032DBYTE[0x0032]=0x1b;}//setdataataddress0x20~0x7funsignedcharidataaddress_at_0x20;voidIramSet(unsignedcharvalue){unsignedcharidata*index=&add

4、ress;unsignedchari;for(i=0;i<(0x7f-0x20+0x01);i++){*index=value;index++;}}4、DWORD[address]说明：在8051内部数据存储器里，读取一个字节的内容。自变量：内部数据存储器的地址*2。定义：#defineDWORD((unsignedintvolatiledata*)0)例4：#includevoidIRamSet(unsignedcharvalue);voidmain(void){charva1=0;//cpuinternalramwritedata0xaaIRamSet(0

5、x55);//readcpuinternaldataataddress0x64va1=DWORD[0x0032];//write0x26dataataddress0x64DWORD[0x0032]=0x26;}//setdataataddress0x20~0x7funsignedcharidataaddress_at_0x20;voidIramSet(unsignedcharvalue){unsignedcharidata*index=&address;unsignedchari;for(i=0;i<(0x7f-0x20+0x01);i++){*index=value;index

6、++;}}5、PBYTE[address]说明：在外部数据存储器(0~0xff)里，读取一个字节的内容。自变量：外部数据存储器的地址(0~0xff)。定义：#definePBYTE((unsignedcharvolatilepdata*)0)例5：#includevoidPRamSet(unsignedcharvalue);voidmain(void){charva1=0;//externalramwritedata0xd8PRamSet(0xd8);//readexternalramdataataddress0x22va1=PBYTE[0x22];//wri

7、te0x43dataatexternalramaddress0x22PBYTE[0x22]=0x43;}//setexternalramdataataddress:0x20~0x2d=mtv212mDAC0~DAC13unsignedcharpdataaddress_at_0x20;voidPramSet(unsignedcharvalue){unsignedcharpdata*index=&address;unsignedchari;for(i=0;i<(0x2d-0x20+0