1 | void pwm_init(void)
|
2 | {
|
3 | //Enable PE and TIM1
|
4 | RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);
|
5 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
|
6 |
|
7 | //PE 8,9 Output
|
8 | GPIO_InitTypeDef GPIO_InitStructure;
|
9 |
|
10 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9;
|
11 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
|
12 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
|
13 | GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
|
14 | GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
|
15 | GPIO_Init(GPIOE, &GPIO_InitStructure);
|
16 |
|
17 | GPIO_PinAFConfig(GPIOE, GPIO_PinSource8, GPIO_AF_TIM1);
|
18 | GPIO_PinAFConfig(GPIOE, GPIO_PinSource9, GPIO_AF_TIM1);
|
19 |
|
20 | //TIM1 PWM
|
21 | TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
|
22 | TIM_OCInitTypeDef TIM_OCInitStructure;
|
23 |
|
24 | TIM_TimeBaseStructure.TIM_Period = 0xFFFF; // Auto-Reload Value
|
25 | TIM_TimeBaseStructure.TIM_Prescaler = 0xFFFF; // 0xFFFF ~1.28kHz 0x07FF ~41kHz 0x1FFF ~ 20 kHz
|
26 | TIM_TimeBaseStructure.TIM_ClockDivision = 0;
|
27 | TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
|
28 |
|
29 | TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
|
30 |
|
31 | /* PWM1 Mode configuration: Channel1 */
|
32 | TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
|
33 | TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
|
34 | TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
|
35 | TIM_OCInitStructure.TIM_Pulse = 0xEFFF; //Duty-Cycle, TIM1_CCR1
|
36 | TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
|
37 | TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; // High: OCN = ~OC
|
38 | TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; // Rotor bypass high-side
|
39 | TIM_OCInitStructure.TIM_CCNIdleState = TIM_OCNIdleState_Set;
|
40 |
|
41 | TIM_OC1Init(TIM1, &TIM_OCInitStructure);
|
42 |
|
43 | TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
|
44 |
|
45 | TIM_ARRPreloadConfig(TIM1, ENABLE);
|
46 |
|
47 | TIM_Cmd(TIM1, ENABLE);
|
48 |
|
49 | }
|