-
-
Notifications
You must be signed in to change notification settings - Fork 0
/
pwm.c
63 lines (59 loc) · 1.12 KB
/
pwm.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
#include "main.h"
void _SetDutyPWM1(unsigned int DutyCycle)
{
PR2 = 99;
CCPR1L = DutyCycle;
CCP1X = T2CKPS1;
CCP1Y = T2CKPS0;
}
void _SetUpPWM1(void)
{
TRISC2 = 0;
// cau hinh cho CCP1 o che do PWM
CCP1M3 = 1;
CCP1M2 = 1;
CCP1M1 = 0;
CCP1M0 = 0;
TOUTPS3 = 0;
TOUTPS2 = 0;
TOUTPS1 = 0;
TOUTPS0 = 0;
TMR2ON = 0;
T2CKPS1 = 0;
T2CKPS0 = 0;
_SetDutyPWM1(0);
TMR2ON = 1;
}
void _SetDutyPWM2(unsigned int DutyCycle)
{
PR2 = 99;
CCPR2L = DutyCycle;
CCP2X = T2CKPS1;
CCP2Y = T2CKPS0;
}
void _SetUpPWM2(void)
{
TRISC1 = 0;
// cau hinh cho CCP2 o che do PWM
CCP2M3 = 1;
CCP2M2 = 1;
CCP2M1 = 0;
CCP2M0 = 0;
TOUTPS3 = 0;
TOUTPS2 = 0;
TOUTPS1 = 0;
TOUTPS0 = 0;
TMR2ON = 0;
T2CKPS1 = 0;
T2CKPS0 = 0;
_SetDutyPWM2(0);
TMR2ON = 1;
}
/*
Ap dung cong thuc chu ky PWM ta co:
T(pwm)=[PR2+1]*4*(Tosc)*(TMR2 Prescale Value)
=[PR2+1]*4*(1/Fosc)*(TMR2 Prescale Value)
hay T(pwm)=[99+1]*4*(1/4)*1
=100*10^(-6)=10^(-4)=10khz
vay tan so de dieu khien dong co la 10(kHz)
*/