关于HCS08单片机的问题？？？

单片机

单片机：MC9S08SG8

我用其TPM1益出中断做心跳时钟（10ms），TPM1CH1做信号输入捕获（信号来源是

接收无线信号后的数字信号）。

现象是：当捕获信号频率为8K~16K之间时，我的心跳时间就会变化，不稳

定,>10ms,=10ms,<10ms参杂在一齐。比如有30ms,10ms,2ms等等。。

当捕获信号小于8K，大于16K就没有多少影响了。

请各位高手帮兄弟指点一下。。。。。。。。。。

谢谢！~

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2^#

win2000_li发表于 2010-5-6 13:37 | 只看该作者

interrupt 6 void isrVtpm1ch1(void)
{
INT8U  DataCnt  = SetZero;
INT16U TempVale = SetZero;

static INT8U TmpCnt    = SetZero;       // 20100505
static INT8U TimeOutCNT = SetZero;

static INT16U TempReValue    = SetZero; // 20100505
static INT16U TempRevBuf[2] = {0, 0};

TempVale    = TPM1C1SC;
TPM1C1SC_CH1F  = ClrZero;

TempRevBuf[1] = TempRevBuf[0];
TempRevBuf[0] = TPM1C1V;

if (TempRevBuf[0] > TempRevBuf[1])
{
TempVale = TempRevBuf[0] - TempRevBuf[1];
}
else
{
TempVale = TempRevBuf[0] + T1PERIOD - TempRevBuf[1];
}

switch (RkeStep)
{
case MB_TP:
{
if ((TempVale >= MB_TP_MIN) && (TempVale <= MB_TP_MAX))
{
TmpCnt++;
if (MB_TP_CNT == TmpCnt)
{
TmpCnt  = ClrZero;
RkeStep = MB_TH;
}
}
else
{
RkeStep = MB_TP;
TmpCnt  = ClrZero;
}
}break;

case MB_TH:
{
if ((TempVale >= MB_TP_MIN) && (TempVale <= MB_TP_MAX))
{
if (++TimeOutCNT >= MB_TIME_OUT)
{
RkeStep = MB_TP;
TimeOutCNT = ClrZero;
//TPM_EDG_ALL;
TPM1C1SC_ELS1B = 1;
TPM1C1SC_ELS1A = 1;
}
}
else if ((TempVale >= MB_TH_MIN) && (TempVale <= MB_TH_MAX))
{
RkeStep = MB_DATA;
TimeOutCNT = ClrZero;
//TPM_EDG_FALLING;
TPM1C1SC_ELS1B = 1;
TPM1C1SC_ELS1A = 0;
}
else
{
RkeStep = MB_TP;
TimeOutCNT = ClrZero;
//TPM_EDG_ALL;
TPM1C1SC_ELS1B = 1;
TPM1C1SC_ELS1A = 1;
}
}break;

case MB_DATA:
{
//下降沿
if ((TPM1C1SC_ELS1B == TRUE) && (TPM1C1SC_ELS1A == FALSE))
{
//TPM_EDG_RISING;
TPM1C1SC_ELS1B = 0;
TPM1C1SC_ELS1A = 1;
if ((TempVale > MB_TE_MIN) && (TempVale < MB_2TE_MAX))
{
TempReValue = TempVale;

if (bitCnt == MB_LAST_BIT)
{
if ((TempReValue > MB_TE_MIN) && (TempReValue < MB_TE_MAX))
{
RKE_FIFO_DATA[4] |= (1 << ((INT16U)(bitCnt & 0x0f)));
}
else
{
RKE_FIFO_DATA[4] &= (~(1 << ((INT16U)(bitCnt & 0x0f))));
}
bitCnt++;
}
}
else
{
RkeStep = MB_TP;
bitCnt  = ClrZero;
//TPM_EDG_ALL;
TPM1C1SC_ELS1B = 1;
TPM1C1SC_ELS1A = 1;
}
} //上升沿
else if ((TPM1C1SC_ELS1B == FALSE) && (TPM1C1SC_ELS1A == TRUE))
{
//TPM_EDG_FALLING;
TPM1C1SC_ELS1B = 1;
TPM1C1SC_ELS1A = 0;
if ((TempVale > MB_TE_MIN) && (TempVale < MB_2TE_MAX))
{
DataCnt = (bitCnt >> 4);
if (TempReValue > TempVale)
{
RKE_FIFO_DATA[DataCnt] &= (~(1 << ((INT16U)(bitCnt & 0x0f))));
}
else
{
RKE_FIFO_DATA[DataCnt] |= (1 << ((INT16U)(bitCnt & 0x0f)));
}

bitCnt++;
}
else
{
RkeStep = MB_TP;
bitCnt  = ClrZero;
//TPM_EDG_ALL;
TPM1C1SC_ELS1B = 1;
TPM1C1SC_ELS1A = 1;
}
}
else
{
RkeStep = MB_TP;
bitCnt  = ClrZero;
//TPM_EDG_ALL;
TPM1C1SC_ELS1B = 1;
TPM1C1SC_ELS1A = 1;
}

if (bitCnt >= MB_TOTAL)
{
RkeStep    = MB_END;
bitCnt    = ClrZero;
RkeStepFinish = TRUE;
//TPM_EDG_ALL;
TPM1C1SC_ELS1B = 1;
TPM1C1SC_ELS1A = 1;
}
}
break;

case MB_END:
{
if (TRUE == DataSpaceStat)
{
DataSpaceStat = ClrZero;
RkeStep = MB_TP;
//TPM_EDG_ALL;
TPM1C1SC_ELS1B = 1;
TPM1C1SC_ELS1A = 1;
}
}break;

default:
{
bitCnt  = ClrZero;
RkeStep = MB_TP;
TmpCnt  = SetZero;

TimeOutCNT  = ClrZero;
      TempReValue = ClrZero;

      TempRevBuf[0] = ClrZero;
TempRevBuf[1] = ClrZero;
DataSpaceStat = ClrZero;
RkeStepFinish = ClrZero;

//TPM_EDG_ALL;
TPM1C1SC_ELS1B = 1;
TPM1C1SC_ELS1A = 1;
}break;
}
}

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