1 | void PWMSignalControl(void)
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2 | {
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3 |
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4 | /* TIM1 channels Configuration in PWM mode */
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5 | TIM_Config();
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6 |
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7 | /* COMP2 Configuration */
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8 | COMP_Config();
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9 |
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10 | /* Infinite loop */
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11 | while (1)
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12 | {
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13 | }
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14 | }
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15 | void TIM_Config(void)
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16 | {
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17 |
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18 | TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
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19 | TIM_OCInitTypeDef TIM_OCInitStructure;
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20 | TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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21 | GPIO_InitTypeDef GPIO_InitStructure;
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22 |
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23 | /* GPIOA clock enable */
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24 | RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
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25 |
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26 | /* TIM1 channels pin configuration:
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27 | TIM1_CH1 -> PA8
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28 | */
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29 | GPIO_StructInit(&GPIO_InitStructure);
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30 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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31 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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32 | GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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33 | GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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34 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
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35 | GPIO_Init(GPIOA, &GPIO_InitStructure);
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36 |
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37 | /* Enable Alternate function on PA8 to be controlled by TIM1 */
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38 | GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_2);
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39 |
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40 | /* TIM1 clock enable */
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41 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
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42 |
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43 | /* Time Base configuration */
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44 | TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
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45 | TIM_TimeBaseStructure.TIM_Prescaler = 0;
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46 | TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
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47 | TIM_TimeBaseStructure.TIM_Period = 480;
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48 | TIM_TimeBaseStructure.TIM_ClockDivision = 0;
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49 | TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
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50 | TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
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51 |
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52 | /* Channel 1 Configuration in PWM mode */
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53 | TIM_OCStructInit(&TIM_OCInitStructure);
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54 | TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
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55 | TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
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56 | TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
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57 | TIM_OCInitStructure.TIM_Pulse = 240;
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58 | TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
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59 | TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;
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60 | TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
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61 | TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
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62 | TIM_OC1Init(TIM1, &TIM_OCInitStructure);
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63 |
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64 | /* Automatic Output enable, Break, dead time and lock configuration*/
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65 | TIM_BDTRStructInit(&TIM_BDTRInitStructure);
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66 | TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
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67 | TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
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68 | TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;
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69 | TIM_BDTRInitStructure.TIM_DeadTime = 11;
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70 | TIM_BDTRInitStructure.TIM_Break = TIM_Break_Enable;
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71 | TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
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72 | TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
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73 | TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);
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74 |
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75 | /* Main Output Enable */
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76 | TIM_CtrlPWMOutputs(TIM1, ENABLE);
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77 |
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78 | /* TIM1 counter enable */
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79 | TIM_Cmd(TIM1, ENABLE);
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80 | }
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81 |
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82 | /**
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83 | * @brief Configures COMP2: PA3 as COMP2 non inverting input
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84 | * VREFINT as COMP2 inverting input
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85 | * and COMP2 output to TIM2 BKIN.
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86 | * @param None
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87 | * @retval None
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88 | */
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89 | void COMP_Config(void)
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90 | {
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91 |
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92 | COMP_InitTypeDef COMP_InitStructure;
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93 | GPIO_InitTypeDef GPIO_InitStructure;
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94 | /* GPIOA Peripheral clock enable */
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95 | RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
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96 |
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97 | /* Configure PA3 in analog mode: PA3 is connected to COMP2 non inverting input */
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98 | GPIO_StructInit(&GPIO_InitStructure);
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99 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
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100 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
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101 | GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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102 | GPIO_Init(GPIOA, &GPIO_InitStructure);
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103 |
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104 | /* COMP Peripheral clock enable */
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105 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
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106 |
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107 | /* COMP2 config */
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108 | COMP_StructInit(&COMP_InitStructure);
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109 | COMP_InitStructure.COMP_InvertingInput = COMP_InvertingInput_VREFINT;
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110 | COMP_InitStructure.COMP_Output = COMP_Output_TIM1BKIN;
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111 | COMP_InitStructure.COMP_Hysteresis = COMP_Hysteresis_No;
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112 | COMP_InitStructure.COMP_Mode = COMP_Mode_HighSpeed;
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113 | COMP_InitStructure.COMP_OutputPol = COMP_OutputPol_NonInverted;
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114 | COMP_Init(COMP_Selection_COMP2, &COMP_InitStructure);
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115 |
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116 | /* Enable COMP2 */
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117 | COMP_Cmd(COMP_Selection_COMP2, ENABLE);
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