8位单片机MC9S08DZ60 TPM2模块请教！！！急

celever2005

As a customer of freescale Co. for long time ,I have tried to develop a item which was related to the model
of TPM2 at the DEMO9S08DZ60. I want to realize a PWM with edentulous rectangle wave.namely ,58 rectangle
wave and two teeth missing .make up one period.I have paid so much time for debugging .There got  nothing
but to get puzzled,the ondoscope showed a PWM with 3 teeth missing . Obviously ,I wrote a C program to realize
a PWM with two teeth missing,but got 3 teeth missing.Then,I wrote another program in order to get a PWM with
one tooth missing,but got 2 teeth missing. I was puzzled for a long time.
 
I used the single chip of  MC9S08DZ60 .There is the program below:
//****************************************************
#include
#include "derivative.h"
volatile unsigned char CrankNum;
//volatile unsigned char CamNum;
volatile unsigned int   ModValCalc;
volatile unsigned int   ChanlValCalc;
//****************************************************
void Init_tpm2_ch0_edge_pwm(void);
//****************************************************
void main(void)
{
   CrankNum     =        0;
  // CamNum       =        0;
   ModValCalc    =        0x08c9;
   ChanlValCalc  =        0x0465;
   void Init_tpm2_ch0_edge_pwm();
   TPM2CNTH    =        0;
   EnableInterrupts;
 
   for(;;)
        {  
            _RESET_WATCHDOG();   
        }
}
//****************************************************
void Init_tpm2_ch0_edge_pwm(void)
{
   TPM2MODH        =        (unsigned char)(ModValCalc>>8);
   TPM2MODL        =         ModValCalc  &  0xFF;
 
   TPM2C0VH         =        (unsigned char)(ChanlValCalc>>8);
   TPM2C0VL         =         ChanlValCalc  &  0xFF;

   TPM2C0SC         =        0x28;
   TPM2SC            =         0x4F;           // div by 128 , bus clk  ISR enable.
}
//****************************************************
interrupt VectorNumber_Vtpm2ovf void TPM2_OVF_ISR(void)
{
  // volatile char cam_pos;
   if((TPM2SC & 0x80) == 0x80)
      {
          TPM2SC_TOF   =   0;
          ++CrankNum;
          switch(CrankNum)
             {
                 case 58 :         TPM2C0VH   =   0x00;                    //the 59th tooth position is  a  missing tootn
                                       TPM2C0VL   =   0x00;
                                       break;
                 case 118 :       TPM2C0VH   =   0x00;                    //the 118th tooth position is  a  missing tootn                                        TPM2C0VL   =   0x00;
                                       break;
                 case 120 :       CrankNum    =   0x00;                                        TPM2CNTH   =   0x00;
                                       break;
                 case 59 :         TPM2C0VH   =   (unsigned char)(ChanlValCalc>>8);                                   
                                       TPM2C0VL   =   ChanlValCalc  &  0xFF;
                                       break;
                 case 119 :       TPM2C0VH   =   (unsigned char)(ChanlValCalc>>8);                                        TPM2C0VL   =   ChanlValCalc  &  0xFF;
                                       break;
                 default:           break;
             }           



       }
}
//****************************************************
 During the ISR function of "TPM2_OVF_ISR(void)" , I made a  arithmetic for the program to get the PWM with one teeth missing ,but got two teeth missing.
I need help ,thanks
 

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安

上传一个附件上来，关于TIM产生PWM的。

xuridianzi

正在学习，多上传些示例程序
谢了，已下载。

zooqic

除此之外，你也没有打开看门狗，也没有设置总线频率等等~~

stushop

公司项目原因，停了下来，剩余大部分材料，有要的朋友，请联系，有;GPS（HOLUXM89）,GPRS(SIM300D),Freescale的DZ60/DZ32(64脚的)，等处理，联系电话：13521625939

celever2005

回复第 4 楼 zooqic于2010-08-17 06:15:13发表:
除此之外，你也没有打开看门狗，也没有设置总线频率等等~~ 

看门狗打开了，总线频率我 选择默认设置，即8M，

安

请把你的问题转成中文的，大家好帮你解决。首先采集时要配置是输入、触发方式等，具体可以在论坛中找关于这方面的例程。

wanl0418

111

jordonwu

mark......

凝析

假如我使用TPM2定时计数32.67ms，同时需要在TPM2ch0产生2.6KHz的方波，需要怎么设置才能在需要的时候TPM2ch0方波正常输出，在不需要的时候TPM2ch0没有方波输出而不影响计数呢？
本来我是设置
void INIT_TPM2ch0(void)
{
        TPM2SC=0x48;//
        TPM2MOD = 6154;  //PWM波的周期为0.385ms
        TPM2C0SC = 0X68;   //工作模式为边缘对齐PWM输出，高有效，禁止中断；
          TPM2C0V = 3077;    //有效部分占50%，占空比为50%
}
想在不需要输出方波时设置TPM2C0V = 0来使TPM2ch0输出低电平的，但是却没有得到想要的低电平，求高手指导！