想了解一下這一段程序的意義和解讀，不太能理解，是固定的格式嗎？直接寫上去就行嗎？
void IapIdle()
{
IAP_CONTR = 0;
IAP_CMD = 0;
IAP_TRIG = 0;
IAP_ADDRH = 0x80;
IAP_ADDRL = 0;
}
uchar IapReadByte(uint addr)
{
uchar dat;
IAP_CONTR = ENABLE_IAP;
IAP_CMD = CMD_READ;
IAP_ADDRL = addr;
IAP_ADDRH = addr >> 8;
IAP_TRIG = 0x5a;
IAP_TRIG = 0xa5;
_nop_();
dat = IAP_DATA;
IapIdle();
return dat;
}
void IapProgramByte(uint addr, uchar dat)
{
IAP_CONTR = ENABLE_IAP;
IAP_CMD = CMD_PROGRAM;
IAP_ADDRL = addr;
IAP_ADDRH = addr >> 8;
IAP_DATA = dat;
IAP_TRIG = 0x5a;
IAP_TRIG = 0xa5;
_nop_();
IapIdle();
}
void IapEraseSector(uint addr)
{
IAP_CONTR = ENABLE_IAP;
IAP_CMD = CMD_ERASE;
IAP_ADDRL = addr;
IAP_ADDRH = addr >> 8;
IAP_TRIG = 0x5a;
IAP_TRIG = 0xa5;
_nop_();
IapIdle();
}
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