宏的确是个好武器,在CE驱动开发过程中,正确,准确的使用恰当的宏,能使得代码非常精炼,书之精彩,阅之愉悦.对于开发中经常用到的一些宏,我在这里做了一些总结.
寄存器操作
8bit#define INREG8(x) READ_REGISTER_UCHAR((UCHAR*)(x))#define OUTREG8(x, y) WRITE_REGISTER_UCHAR((UCHAR*)(x), (UCHAR)(y))#define SETREG8(x, y) OUTREG8(x, INREG8(x)|(y))#define CLRREG8(x, y) OUTREG8(x, INREG8(x)&~(y))#define INSREG8(addr, mask, val) OUTREG8(addr, ((INREG8(addr)&(~(mask))) | val))#define EXTREG8(addr, mask, lsh) ((INREG8(addr) & mask) >> lsh)16bit#define INREG16(x) READ_REGISTER_USHORT((USHORT*)(x))#define OUTREG16(x, y) WRITE_REGISTER_USHORT((USHORT*)(x),(USHORT)(y))#define SETREG16(x, y) OUTREG16(x, INREG16(x)|(y))#define CLRREG16(x, y) OUTREG16(x, INREG16(x)&~(y))#define INSREG16(addr, mask, val) OUTREG16(addr, ((INREG16(addr)&(~(mask))) | val))#define EXTREG16(addr, mask, lsh) ((INREG16(addr) & mask) >> lsh)32bit#define INREG32(x) READ_REGISTER_ULONG((ULONG*)(x))#define OUTREG32(x, y) WRITE_REGISTER_ULONG((ULONG*)(x), (ULONG)(y))#define SETREG32(x, y) OUTREG32(x, INREG32(x)|(y))#define CLRREG32(x, y) OUTREG32(x, INREG32(x)&~(y))#define INSREG32(addr, mask, val) OUTREG32(addr, ((INREG32(addr)&(~(mask))) | val))#define EXTREG32(addr, mask, lsh) ((INREG32(addr) & mask) >> lsh)
位域操作
#define EXTREG8BF(addr, bit) (EXTREG8(addr, CSP_BITFMASK(bit), (bit ## _LSH)))#define INSREG8BF(addr, bit, val) (INSREG8(addr, CSP_BITFMASK(bit), CSP_BITFVAL(bit, val)))#define EXTREG16BF(addr, bit) (EXTREG16(addr, CSP_BITFMASK(bit), (bit ## _LSH)))#define INSREG16BF(addr, bit, val) (INSREG16(addr, CSP_BITFMASK(bit), CSP_BITFVAL(bit, val)))#define EXTREG32BF(addr, bit) (EXTREG32(addr, CSP_BITFMASK(bit), (bit ## _LSH)))#define INSREG32BF(addr, bit, val) (INSREG32(addr, CSP_BITFMASK(bit), CSP_BITFVAL(bit, val)))
#define CSP_BITFEXT(var, bit) ((var & CSP_BITFMASK(bit)) >> (bit ## _LSH))#define CSP_BITFCLR(var, bit) (var &= (~CSP_BITFMASK(bit)))#define CSP_BITFINS(var, bit, val) \ (CSP_BITFCLR(var, bit)); (var |= CSP_BITFVAL(bit, val))#define CSP_BITFMASK(bit) (((1U << (bit ## _WID)) - 1) << (bit ## _LSH))#define CSP_BITFVAL(bit, val) ((val) << (bit ## _LSH))
函数
#define WIDEN2(x) L ## x#define WIDEN(x) WIDEN2(x)#define __WFUNCTION__ WIDEN(__FUNCTION__)#define CSP_FUNC_TRACE_ENTRY() \ DEBUGMSG(1, (TEXT("+%s\r\n"), __WFUNCTION__))#define CSP_FUNC_TRACE_EXIT() \ DEBUGMSG(1, (TEXT("-%s\r\n"), __WFUNCTION__))#define DllExport __declspec( dllexport )
其他有用信息
如果重现重复定义的warning,可以采用以下办法来解除之前的定义
#undef INREG8#undef OUTREG8#undef SETREG8#undef CLRREG8#undef INREG16#undef OUTREG16#undef SETREG16#undef CLRREG16#undef INREG32#undef OUTREG32#undef SETREG32#undef CLRREG32