Macros em C
Enviado: 24 Mai 2014 18:06Senhores
Me deparei com as seguintes linhas de código em uma biblioteca gostaria de saber se alguém sabe me dizer oque elas fazem se são macros msm.
tem esses : e ? também
Obrigado.
Alexandre Maffeis
Me deparei com as seguintes linhas de código em uma biblioteca gostaria de saber se alguém sabe me dizer oque elas fazem se são macros msm.
- Código: Selecionar todos
#define HID_UsagePage(x) 0x05,x
#define HID_UsagePageVendor(x) 0x06,x,0xFF
#define HID_LogicalMin(x) 0x15,x
#define HID_LogicalMinS(x) 0x16,(x&0xFF),((x>>8)&0xFF)
#define HID_LogicalMinL(x) 0x17,(x&0xFF),((x>>8)&0xFF),((x>>16)&0xFF),((x>>24)&0xFF)
#define HID_LogicalMax(x) 0x25,x
#define HID_LogicalMaxS(x) 0x26,(x&0xFF),((x>>8)&0xFF)
#define HID_LogicalMaxL(x) 0x27,(x&0xFF),((x>>8)&0xFF),((x>>16)&0xFF),((x>>24)&0xFF)
#define HID_PhysicalMin(x) 0x35,x
#define HID_PhysicalMinS(x) 0x36,(x&0xFF),((x>>8)&0xFF)
#define HID_PhysicalMinL(x) 0x37,(x&0xFF),((x>>8)&0xFF),((x>>16)&0xFF),((x>>24)&0xFF)
#define HID_PhysicalMax(x) 0x45,x
#define HID_PhysicalMaxS(x) 0x46,(x&0xFF),((x>>8)&0xFF)
#define HID_PhysicalMaxL(x) 0x47,(x&0xFF),((x>>8)&0xFF),((x>>16)&0xFF),((x>>24)&0xFF)
#define HID_UnitExponent(x) 0x55,x
#define HID_Unit(x) 0x65,x
#define HID_UnitS(x) 0x66,(x&0xFF),((x>>8)&0xFF)
#define HID_UnitL(x) 0x67,(x&0xFF),((x>>8)&0xFF),((x>>16)&0xFF),((x>>24)&0xFF)
#define HID_ReportSize(x) 0x75,x
#define HID_ReportID(x) 0x85,x
#define HID_ReportCount(x) 0x95,x
#define HID_Push 0xA0
#define HID_Pop 0xB0
tem esses : e ? também
- Código: Selecionar todos
PreemptPriorityBits = ((7 - PriorityGroupTmp) > __NVIC_PRIO_BITS) ? __NVIC_PRIO_BITS : 7 - PriorityGroupTmp;
Obrigado.
Alexandre Maffeis