điều chế độ rộng xung ra sin (SPWM)

[xuanthuan]

em lang thang trên mạng thì tìm được cái code của mấy anh điện tử việt nam lên em làm thử quả nhiên ra sine thật mấy anh à đây là link của em nó các anh xem xong chém nhẹ hihi
có gì anh nam sửa cho em cái sai sót

https://www.facebook.com/video.php?v...type=2&theater

[NguyenDucTin]

mọi người có ai lập trình tạo sin PWM cho pic 18f4431 chưa giậy? chỉ mình sai chổ nào trog code này đi. mình sửa mãi mà không chạy. trong đồ án nghịch lưu 3 pha... ;(((

code mình:

#include<htc.h>
//#include<stdio.h>
#include<math.h>
__CONFIG(1,HS);//HS
__CONFIG(2,WDTWINDIS);
__CONFIG(3,MCLREN,PWM4RB5,PWRTDIS);
__CONFIG(4,LVPDIS,STVRDIS,BORDIS);
#define _XTAL_FREQ 20000000
float Ta,Tb,To,U,V,W;
char sector;
unsigned int i,j;

unsigned int data[300]={0,40,81,121,161,202,242,282,322,363,403,443,
484,524,564,604,645,685,725,765,805,846,886,926,96 6,1006,1047,1087,1127,
1167,1207,1247,1287,1327,1367,1407,1447,1487,1527, 1567,1607,1647,1687,
1727,1767,1806,1846,1886,1926,1965,2005,2045,2084, 2124,2164,2203,2243,
2282,2322,2361,2401,2440,2480,2519,2558,2598,2637, 2676,2715,2754,2793,
2833,2872,2911,2950,2989,3027,3066,3105,3144,3183, 3222,3260,3299,3337,3376,
3415,3453,3491,3530,3568,3607,3645,3683,3721,3759, 3797,3835,3873,3911,3949,
3987,4025,4063,4100,4138,4176,4213,4251,4288,4326, 4363,4400,4437,4475,4512,
4549,4586,4623,4660,4697,4733,4770,4807,4843,4880, 4916,4953,4989,5026,5062,
5098,5134,5170,5206,5242,5278,5314,5350,5385,5421, 5457,5492,5527,5563,5598,
5633,5668,5704,5739,5774,5808,5843,5878,5913,5947, 5982,6016,6050,6085,
6119,6153,6187,6221,6255,6289,6323,6356,6390,6424, 6457,6490,6524,6557,6590,
6623,6656,6689,6722,6755,6787,6820,6852,6885,6917, 6949,6981,7013,7045,7077,
7109,7141,7172,7204,7235,7267,7298,7329,7360,7391, 7422,7453,7484,7514,
7545,7576,7606,7636,7666,7696,7726,7756,7786,7816, 7846,7875,7904,7934,7963,
7992,8021,8050,8079,8108,8136,8165,8193,8222,8250, 8278,8306,8334,8362,8390,
8417,8445,8472,8500,8527,8554,8581,8608,8635,8662, 8688,8715,8741,8767,8793,
8820,8846,8871,8897,8923,8948,8974,8999,9024,9049, 9074,9099,9124,9149,9173,
9198,9222,9246,9270,9294,9318,9342,9365,9389,9412, 9436,9459,9482,9505,9528,
9550,9573,9595,9618,9640,9662,9684,9706,9728,9749, 9771,9792,9814,9835,
9856,9877,9898,9918,9939,9959,9980};

/*unsigned int data[300]={127, 130, 132, 135, 138, 140, 143, 146, 148, 151, 153, 156,
159, 161, 164, 166, 169, 171, 174, 176, 179, 181, 183, 186, 188, 191, 193, 195, 197, 199, 202, 204, 206, 208, 210, 212, 214,
216, 218, 220, 221, 223, 225, 227, 228, 230, 231, 233, 234, 236, 237, 238, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 249,
250, 251, 251, 252, 252, 253, 253, 253, 254, 254, 254, 254, 254, 254, 254, 254, 254, 253, 253, 253, 252, 252, 251, 251, 250, 249, 249,
248, 247, 246, 245, 244, 243, 242, 241, 240, 238, 237, 236, 234, 233, 231, 230, 228, 227, 225, 223, 221, 220, 218, 216, 214, 212, 210,
208, 206, 204, 202, 199, 197, 195, 193, 191, 188, 186, 183, 181, 179, 176, 174, 171, 169, 166, 164, 161, 159, 156, 153, 151, 148, 146,
143, 140, 138, 135, 132, 130, 127, 124, 122, 119, 116, 114, 111, 108, 106, 103, 101, 98, 95, 93, 90, 88, 85, 83, 80, 78, 75, 73, 71, 68,
66, 63, 61, 59, 57, 55, 52, 50, 48, 46, 44, 42, 40, 38, 36, 34, 33, 31, 29, 27, 26, 24, 23, 21, 20, 18, 17, 16, 14, 13, 12, 11, 10,9,8,7,6,
5,5,4,3,3,2, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 3, 3, 4, 5, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 20, 21, 23, 24, 26, 27, 29,
31, 33, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 55, 57, 59, 61, 63, 66, 68, 71, 73, 75, 78, 80, 83, 85, 88,
90, 93, 95, 98, 101, 103, 106, 108, 111, 114, 116, 119, 122, 124};*/
void main()
{
char m=0;
i=sector=0;
//khoi tao PWM tan so 5KHz, => T = 0.0002(s)
PTCKPS1= 0; PTCKPS0=0; // bo chia 1:1--------------------------------------

PTMOD1=1; PTMOD0 =0; // continuos up/down counting

PTEN =1; // PWM time base on

PWMEN2 = 1; PWMEN1 = PWMEN0 =0; // dung cac chan PWM0--5

PMOD0 = PMOD1 = PMOD2 = 1; // independent : chay doc lap
// complementary : chay bu tru nhau

SEVOPS3 = SEVOPS2 = SEVOPS1 = SEVOPS0 =0; // các bit co dãn ngõ ra PWM dac biet. : 1-1
//-------------------------------------------------------------

//tan so PWM 5KHz -> T = 1/5000 = 0.0002(s)
/*(PTPER.4+1).4.Pre/Fosc=1/T
=> (PTPER.4+1).4.Pre = 4000
chon Pre = 1.
=> PTPER = 250.
PTPER = PTPERH.256 + PTPERL
=> PTPERH = 0 , PTPERL =250
Ts = PTPER*4
*/
PTPERH =0; PTPERL =250;

// dead time 1us
DTCON = 0b00000001;

// interrupt PWM
PTIE =1; PTIF = 0; IPEN = 1; GIE = 1;
LATB6 =1; RB6 =1;

while(1)
{}
}
void interrupt ngat()
{
if(PTIF)
{
Ta=50.0*data[299-i]/150.0;
Tb=50.0*data[i]/150.0;
To=(250-Ta-Tb)/2.0;
i=i+3;
if(i>=300)
{
i=0;
sector++;
if(sector>6)
sector=1;
}
switch(sector)
{
case 1:
U= To;
V=To+Ta;
W=250-To;
RD0=1;
break;
case 2:
U= To+Tb;
V=To;
W=250-To;
RD0=0;
break;
case 3:
U= 250-To;
V=To;
W=To+Ta;
RD0=1;
break;
case 4:
U= 250-To;
V=To+Tb;
W=To;
RD0=0;
break;
case 5:
U= To+Ta;
V=250-To;
W=To;
RD0=1;
break;
case 6:
U= To;
V=250-To;
W=To+Tb;
RD0=0;
break;
}
PDC0H=(char)(U/256.0);PDC0L=(char)(U-PDC0H*256.0);
PDC1H=(char)(V/256.0);PDC1L=(char)(V-PDC1H*256.0);
PDC2H=(char)(W/256.0);PDC2L=(char)(W-PDC2H*256.0);
PTIF=0;
}

}

[chaukyo]

Nguyên văn bởi xuanthuan

em lang thang trên mạng thì tìm được cái code của mấy anh điện tử việt nam lên em làm thử quả nhiên ra sine thật mấy anh à đây là link của em nó các anh xem xong chém nhẹ hihi
có gì anh nam sửa cho em cái sai sót

https://www.facebook.com/video.php?v...type=2&theater

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