射频 rc500代码完全注释(10)

1204.return;

1205.delay_50us(20); 1206.if(CmdValid) 1207.return;

1208.delay_50us(20); 1209.if(CmdValid) 1210.return;

1211.delay_50us(19); 1212.if(CmdValid) 1213.return; 1214.}

1215.#endif 1216.} 1217.

1218.///////////////////////////////////////////////////////////////////////

1219./*RC500中断处理总程序*/

1220.///////////////////////////////////////////////////////////////////////

1221.voidRC500ISR(void)interrupt0using1 1222.{

1223.staticunsignedcharidatairqBits; 1224.staticunsignedcharidatairqMask; 1225.staticunsignedcharidatanbytes; 1226.staticunsignedcharidatacnt; 1227.

1228.IE0=0;/*用的是INT0脚*/ 1229.WriteRawIO(0,0x80);

1230.if(MpIsrInfo&&MpIsrOut) 1231.{

1232.while(ReadRawIO(RegPrimaryStatus)&0x08)/*第四位表示是否有中断请求?03H?*/ 1233.{

1234.irqMask=ReadRawIO(RegInterruptEn);/*IRQMASK=中断使能寄存器内容?06H?*/

1235.irqBits=ReadRawIO(RegInterruptRq)&irqMask;/*IRQBITS=中断使能+中断请求寄存器内容?07H?*/

1236.MpIsrInfo->irqSource|=irqBits;

1237.if(irqBits&0x01)/*如果缓冲器FIFO未满成立*/ 1238.{

1239.nbytes=64-ReadRawIO(RegFIFOLength);

1240.if((MpIsrInfo->nBytesToSend-MpIsrInfo->nBytesSent)=nbytes) 1241.{

1242.nbytes=MpIsrInfo->nBytesToSend-MpIsrInfo->nBytesSent;

1243.WriteRawIO(RegInterruptEn,0x01); 1244.}

1245.for(cnt=0;cntnbytes;cnt++) 1246.{

1247.WriteRawIO(RegFIFOData,MpIsrOut[MpIsrInfo->nBytesSent]); 1248.MpIsrInfo->nBytesSent++; 1249.}