/*
09.10.23??09.10.24?實(shí)現(xiàn)
嘗試發(fā)出PWM波形采用對(duì)稱規(guī)則采樣法。
三相發(fā)出的正弦波都很完美。唯一的問題是中斷函數(shù)執(zhí)行了160us有點(diǎn)時(shí)間太長(zhǎng)了
總共也就200us的時(shí)間。看能否想辦法再精簡(jiǎn)程序
采用匯編則可采用角度查詢法，當(dāng)然需要360°的sin值表
RC濾波器參數(shù)：0.1uF、10k??????加上窄脈沖刪除??94us
*/
#include?“SEED-DEC2407.h“

void?initial（）;
void?bad_trap（）;
unsigned?long?int?gettime（）;
void?look_up_sin?（）;

/*unsigned?int?i=0j=0l=0;
unsigned?long?int?k=0t=0N=0M=9;//M值的大小和Fc有關(guān)系，?
//Ud不變，Uc隨著Fc的改變而改變，所以M＝Uc/Us值改變。
unsigned?long?int?tm1=0tm2=0tm3=0;
unsigned?int?ADAcount=0ischange=0result=0F_modu=50;*/

//?一些中間的運(yùn)算變量，到時(shí)候能刪的全部刪掉
unsigned?int?Nk;??????????????//N為載波比??N=Fc/F_mode=5000/50=100
extern?unsigned?int?sintab[1801];??
unsigned?int?Temp0=0Temp1=0Temp2=0;
signed?int?Tmp0=0Tmp1=0Tmp2=0Tmp3Tmp4Tmp5;
signed?long?var1var2var3;
signed?int?sinwtcoswt;
signed?int?sinwt_csinwt_bsinwt_acoswt_a;?
??
main（）
{???
	N=5000/50;
????initial（）;?????????????????????????//系統(tǒng)初始化
???	while（1）
????{
	*PEDATDIR=*PEDATDIR?&?0xFFF9;	???//輸出低電平	
	}
}?
void?initial（void）
{
	?asm（“?setc?INTM“）;????????????????//禁止所有可屏蔽中斷
?????asm（“?clrc?SXM“）;?????????????????//抑制符號(hào)擴(kuò)展。SXM=1時(shí)，數(shù)據(jù)通過定標(biāo)移位器
?????//傳送到累加器時(shí)將產(chǎn)生符號(hào)擴(kuò)展
?????asm（“?clrc?OVM“）;		???????????//OVM清零累加器中結(jié)果正常溢出
?????asm（“?clrc?CNF“）;?????????????????//CNF清零B0被設(shè)置為數(shù)據(jù)存儲(chǔ)區(qū)
?????
	?*WDCR=0x68?;??????????????????????//看門狗定時(shí)控制寄存器，禁止看門狗
?????*SCSR1=0x81fe;????????????????????//系統(tǒng)控制及狀態(tài)寄存器1，CPU時(shí)鐘頻率設(shè)置
?????//設(shè)為40MHZ
?????//*SCSR2&=0x000e;				???//SARAM配置為內(nèi)部數(shù)據(jù)MEM??？
	?//*XINT1CR=*XINT2CR=0x8006;???????//禁止外部中斷
?????//*WSGR=0x0000;???????????????????//設(shè)置外部存儲(chǔ)器的接口不插入等待狀態(tài)
	??????????
?????*IFR=0xffff;??????????????????????//清所有系統(tǒng)中斷標(biāo)志
	?*IMR=0x0002;??????????????????????//開?INT2??中斷???	
	?*EVAIFRA=0xffff;??????????????????//清事件管理器A所有中斷標(biāo)志?
	?*EVAIFRB=0xffff;??????????????????//清事件管理器A所有中斷標(biāo)志?
	?*EVAIFRC=0xffff;	???????????????//清事件管理器A所有中斷標(biāo)志?
?????*EVAIMRA=0x0200;	???????????????//T1下溢中斷??使能T1PINT?
	?*EVAIMRB=0;	???????????????????//屏蔽所有中斷
	?*EVAIMRC=0;???????????????????????//屏蔽所有中斷
	?
	?/**ADCTRL1=?0x0900;	???????????//設(shè)置連續(xù)轉(zhuǎn)換模式
	?*MAXCONV?=?0x0;		???????????//每次完成轉(zhuǎn)換1個(gè)通道
	?*CHSELSEQ1=0x0;	???????????????//?ADCIN0
	?*ADCTRL2=?0x2000;?????????????????//啟動(dòng)轉(zhuǎn)換*/?
	?//IO口引腳設(shè)置
?????*MCRA=*MCRA|0x0fc0;???????????????//設(shè)置PWM1～6引腳
?????*MCRC=*MCRC?&?0xFFF9;			???//PWM7/8配置為通用輸出口，測(cè)試用
	?*PEDATDIR|=0x0600;
	?//PWM發(fā)生器設(shè)置（EVA）
	?*ACTRA=0x0999;????????????????????//引腳PWM1、3、5低有效，PWM2、4、6高有效。
	?*T1PR=4000;???????????????????????//T1周期寄存器值為4000，載波頻率為5k
	?*CMPR1=4000;??????????????????????//比較器的比較值，開始時(shí)占空比初始值0%
	?*CMPR2=4000;
	?*CMPR3=4000;
?????*T1CNT=0;?????????????????????????//定時(shí)器1計(jì)數(shù)寄存器???
	?*DBTCONA=0x08f4;??????????????????//死區(qū)周期值為8，死區(qū)預(yù)分頻系數(shù)為32，
	?//死區(qū)值為7×32=224個(gè)CPU時(shí)鐘周期CPU時(shí)鐘周期為50ns，定時(shí)器周期為8×32×25ns???6.4us?
?????*COMCONA=0x8200;??????????????????//比較控制寄存器A?輸出使能，下溢重載
?????//當(dāng)計(jì)數(shù)器T1CNT=0（下溢）時(shí)重載
	?*T1CON=0x0842;????????????????????//定時(shí)器1控制寄存器?F=1連續(xù)增減計(jì)數(shù)方式
?????asm（“?clrc?INTM“）;????????????????//開總中斷???	?
}
void?look_up_sin?（void）
{
?	switch（Temp1）
	{case?0:
		??asm（“?L

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件???????7154??2010-03-16?21:06??spwm程序\SPWM.c

?????文件??????13569??2010-03-16?21:06??spwm程序\vectors.asm

?????目錄??????????0??2010-03-25?09:42??spwm程序

-----------?---------??----------?-----??----

????????????????20723????????????????????3