The CC-RL does not support bit access (specifying the bit position after a period for an SFR or the saddr variable) of the CA78K0. In the CcnvCA78K0, bit access for SFRs and the saddr variable are replaced with a type declaration of a bit field and a macro.
- | The type declaration and macro are output at the beginning of the file and changed to a macro call at an access point. |
- | In bit access, a bit field of 8 or 16 bits is created according to the bit position. If the bit position includes 8 to 15, a bit field with b8 to b15 added is separately created for 16 bits. |
[Examples]
- | Bit position is only 0 to 7 |
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Before conversion
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void func(void)
{
i = var.3;
var.5 = 0;
}
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After conversion
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#ifndef __BIT8
typedef struct {
unsigned int b0:1;
unsigned int b1:1;
unsigned int b2:1;
unsigned int b3:1;
unsigned int b4:1;
unsigned int b5:1;
unsigned int b6:1;
unsigned int b7:1;
} __Bits8;
#define __BIT8(name,bit) (((volatile __near __Bits8*)&name)->b##bit)
#endif
void func(void)
{
i = __BIT8(var,3);
__BIT8(var,5) = 0;
}
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- | Bit position includes 8 to 15 |
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Before conversion
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i = var2.10;
var2.12 = 0;
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After conversion
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#ifndef __BIT16
typedef struct {
unsigned int b0:1;
unsigned int b1:1;
unsigned int b2:1;
unsigned int b3:1;
unsigned int b4:1;
unsigned int b5:1;
unsigned int b6:1;
unsigned int b7:1;
unsigned int b8:1;
unsigned int b9:1;
unsigned int b10:1;
unsigned int b11:1;
unsigned int b12:1;
unsigned int b13:1;
unsigned int b14:1;
unsigned int b15:1;
} __Bits16;
#define __BIT16(name,bit) (((volatile __near __Bits16*)&name)->b##bit)
#endif
void func(void)
{
i = __BIT16(var2,10);
__BIT16(var2,12) = 0;
}
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