1 | /** Enable peripheral clocks */
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2 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); // 90 MHz ADC1 Clk
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3 | RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
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4 | RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
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5 |
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6 | ADC_DeInit();
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7 | ADC_StructInit(&ADC_InitStructure);
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8 |
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9 | ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
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10 | ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
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11 | ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
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12 | ADC_InitStructure.ADC_NbrOfConversion = 2;
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13 | ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
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14 | ADC_InitStructure.ADC_ScanConvMode = ENABLE;
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15 |
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16 | ADC_Init(ADC1, &ADC_InitStructure);
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17 | ADC_Cmd(ADC1, ENABLE);
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18 | ADC_DMACmd(ADC1, ENABLE);
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19 |
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20 | /**
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21 | * Configure Regular Channel Group
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22 | * Tconv = Sampling Time + 12 cycles
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23 | */
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24 | ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_15Cycles); // => Tconv = (15 + 12) cycles = 1.2us
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25 | ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 2, ADC_SampleTime_15Cycles);
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26 |
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27 | ADC_ITConfig(ADC1, ADC_IT_EOC, ENABLE);
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28 |
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29 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
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30 | GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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31 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
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32 | GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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33 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
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34 | GPIO_Init(GPIOC, &GPIO_InitStructure);
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35 |
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36 | NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
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37 | NVIC_InitStructure.NVIC_IRQChannel = ADC_IRQn;
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38 | NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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39 | NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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40 | NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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41 | NVIC_Init(&NVIC_InitStructure);
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42 | NVIC_EnableIRQ(ADC_IRQn);
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43 |
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44 |
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45 | /*************************************************
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46 | * DMA Configuration
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47 | ************************************************/
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48 |
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49 | DMA_StructInit(&DMA_InitStructure);
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50 | DMA_DeInit(DMA2_Stream0);
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51 |
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52 | DMA_InitStructure.DMA_BufferSize = 2;
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53 | DMA_InitStructure.DMA_Channel = DMA_Channel_0;
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54 | DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
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55 | DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t) &PedalConvValue[0];
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56 | DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; // Don't Care
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57 | DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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58 | DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
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59 | DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR;
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60 | DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
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61 | DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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62 | DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
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63 |
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64 | DMA_Init(DMA2_Stream0, &DMA_InitStructure);
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65 |
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66 | GPIO_ToggleBits(GPIOG, GPIO_Pin_13);
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67 | GPIO_ToggleBits(GPIOG, GPIO_Pin_14);
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68 | DMA_Cmd(DMA2_Stream0, ENABLE);
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