宏的確是個好武器,在CE驅動開發過程中,正確,準確的使用恰當的宏,能使得代碼非常精鍊,書之精彩,閱之愉悅.對於開發中經常用到的一些宏,我在這裡做了一些總結.
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)
位網域作業
#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))
函數
#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 )
其他有用資訊
如果重現重複定義的warning,可以採用以下辦法來解除之前的定義
#undef INREG8
#undef OUTREG8
#undef SETREG8
#undef CLRREG8
#undef INREG16
#undef OUTREG16
#undef SETREG16
#undef CLRREG16
#undef INREG32
#undef OUTREG32
#undef SETREG32
#undef CLRREG32
