1 | #include "stm32f30x.h"
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2 | #include "stm32f3_discovery.h"
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3 | #include "main.h"
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4 |
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5 | void comp_init(void);
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6 | void EXTI1_IRQHandler(void);
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7 | void SysTick_Handler(void);
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8 |
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9 | uint32_t Timing = 0;
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10 |
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11 | int main(void)
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12 | {
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13 | // Quarz Einstellungen aktivieren
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14 | SystemInit();
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15 | SysTick_Config(SystemCoreClock/1000);
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16 |
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17 | STM_EVAL_LEDInit(LED3);
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18 | STM_EVAL_LEDInit(LED4);
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19 | STM_EVAL_LEDInit(LED5);
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20 | STM_EVAL_LEDInit(LED9);
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21 | STM_EVAL_LEDInit(LED10);
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22 | STM_EVAL_LEDOn(LED3);
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23 | STM_EVAL_LEDOn(LED4);
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24 | STM_EVAL_LEDOn(LED5);
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25 |
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26 | comp_init();
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27 |
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28 | while(1)
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29 | {
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30 | //blank
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31 | }
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32 | }
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33 |
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34 | void comp_init(void)
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35 | {
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36 | GPIO_InitTypeDef GPIO_InitStructure;
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37 | COMP_InitTypeDef COMP_InitStructure;
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38 | EXTI_InitTypeDef EXTI_InitStructure;
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39 | NVIC_InitTypeDef NVIC_InitStructure;
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40 |
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41 | RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
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42 | RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOF, ENABLE);
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43 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
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44 |
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45 | //Konfiguration des GPIO => PA1 als Input des Comparators
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46 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
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47 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
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48 | GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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49 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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50 | GPIO_Init(GPIOA, &GPIO_InitStructure);
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51 |
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52 | //Konfiguration des GPIO => PF4 als Output des Comparators
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53 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
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54 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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55 | GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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56 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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57 | GPIO_Init(GPIOF, &GPIO_InitStructure);
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58 | GPIO_PinAFConfig(GPIOF, GPIO_PinSource4, GPIO_AF_2);
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59 |
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60 | //Konfiguration des Comp1
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61 | COMP_InitStructure.COMP_InvertingInput = COMP_InvertingInput_VREFINT;
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62 | COMP_InitStructure.COMP_NonInvertingInput = COMP_NonInvertingInput_IO1;
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63 | COMP_InitStructure.COMP_Output = COMP_Output_None;
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64 | COMP_InitStructure.COMP_BlankingSrce = COMP_BlankingSrce_None;
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65 | COMP_InitStructure.COMP_OutputPol = COMP_OutputPol_NonInverted;
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66 | COMP_InitStructure.COMP_Hysteresis = COMP_Hysteresis_No;
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67 | COMP_InitStructure.COMP_Mode = COMP_Mode_HighSpeed;
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68 | COMP_Init(COMP_Selection_COMP1, &COMP_InitStructure); // Enable COMP1 parameters
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69 | COMP_Cmd(COMP_Selection_COMP1, ENABLE); // Enable COMP1
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70 |
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71 | SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource1); //Connected EXTI Line to PA1 pin
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72 |
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73 | //Konfiguration des EXTI
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74 | EXTI_InitStructure.EXTI_Line = EXTI_Line21; //Connected to the Comparator 1 event
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75 | EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
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76 | EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
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77 | EXTI_InitStructure.EXTI_LineCmd = ENABLE;
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78 | EXTI_Init(&EXTI_InitStructure);
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79 |
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80 | //NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
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81 |
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82 | //Konfiguration des NVIC
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83 | NVIC_InitStructure.NVIC_IRQChannel = COMP1_2_3_IRQn;
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84 | NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
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85 | NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
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86 | NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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87 | NVIC_Init(&NVIC_InitStructure);
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88 | }
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89 |
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90 | void COMP1_2_3_IRQHandler(void)
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91 | {
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92 | EXTI_ClearITPendingBit(EXTI_Line21);
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93 | STM_EVAL_LEDToggle(LED10);
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94 | }
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95 |
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96 |
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97 | void SysTick_Handler(void)
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98 | {
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99 | Timing++;
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100 | if(Timing == 500)
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101 | {
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102 | STM_EVAL_LEDToggle(LED9);
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103 | Timing = 0;
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104 | }
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105 | }
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