/*------------------------------------
nRF401无线收发串口中断服务程序
HotPower@126.com 2004.7.18
------------------------------------*/
void sioproc() interrupt SIO_VECTOR// using 1
{
unsigned char i;
unsigned int crc;
if (RI) {//接收中断
RI = 0;
if (!nRFTXEN && SioBuffers.RXCount) {//每次接收20个数据
i = SBUF;
SioBuffers.RXCount --;
SioBuffers.RXBuffers[19 - SioBuffers.RXCount] = i;
switch(SioBuffers.RXCount) {
case 19:
if (i != 0x55) SioBuffers.RXCount = 20;
break;
case 18:
if (i != 0xaa) SioBuffers.RXCount = 20;
break;
case 0:
crc = 0;
for (i = 1; i <= 8; i ++) {
crc = crc16r(GetRXBuffWord(i + i), crc);
}
if (crc != GetRXBuffWord(18))
SioBuffers.RXCount = 20;
else {
nRFTXEN = 1;//发送
for (i = 0; i < 20; i ++) {
SioBuffers.TXBuffers = SioBuffers.RXBuffers;
}
SioBuffers.TXMAXCount = TX_MAXCount;
SioBuffers.TXCount = TX_Count + 32;
TI = 1;//接收结束立即转为发送
}
break;
}
}
}
if (TI) {//发送中断
TI = 0;
if (nRFTXEN && SioBuffers.TXCount) {
SioBuffers.TXCount --;
if (SioBuffers.TXCount > 19) {
SBUF = 0x00;
}
else {
SBUF = SioBuffers.TXBuffers[19 - SioBuffers.TXCount];
}
if (SioBuffers.TXCount == 0) {
if (SioBuffers.TXMAXCount) {
SioBuffers.TXMAXCount --;
SioBuffers.TXCount = TX_Count;
}
else {
nRFTXEN = 0;//发送结束立即转为接收
SioBuffers.RXCount = 20;
}
}
}
}
}
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HotPower 发表于 2004-9-4 20:51 侃单片机 ←返回版面 
举报该贴
用户1479663 2012-2-3 09:44
用户882386 2009-10-7 13:11
用户1008998 2007-11-29 16:07
看过；
用户741296 2007-11-9 08:44
是啊！
有同感！
用户15552 2007-8-20 15:29
菜农老师，我是AVR新人，能不能问你个问题？
用了一片AT90CAN128的片子？但为什么它的第二串口不能工作？