unsigned short ADC_Conf (void)
{
unsigned short cal = 0;
ADC_InitTypeDef ADC_InitStructure;
if (!RCC_ADC_CLK)
RCC_ADC_CLK_ON;
ADC_ClockModeConfig(ADC1, ADC_ClockMode_SynClkDiv4);
// preseteo de registros a default
/* ADCs DeInit */
ADC_DeInit(ADC1);
/* Initialize ADC structure */
ADC_StructInit(&ADC_InitStructure);
/* Configure the ADC1 in continuous mode with a resolution equal to 12 bits */
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward;
ADC_Init(ADC1, &ADC_InitStructure);
//software by setting bit ADCAL=1.
//Calibration can only be initiated when the ADC is disabled (when ADEN=0).
//ADCAL bit stays at 1 during all the calibration sequence.
//It is then cleared by hardware as soon the calibration completes
cal = ADC_GetCalibrationFactor(ADC1);
// Enable ADC1
ADC_Cmd(ADC1, ENABLE);
SetADC1_SampleTime ();
return cal;
}
void temperaInit(void){
//clock
/* Enable GPIOA clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* ADC1 Periph clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
/* DMA1 clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);
NVIC_InitTypeDef NVIC_InitStructure;
/* NVIC configuration */
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
//io
/* Configure PA.02 as analog input */
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOA, &GPIO_InitStruct);
/* DMA1 Channel1 Config */
DMA_InitTypeDef DMA_InitStruct;
DMA_DeInit(DMA1_Channel1);
DMA_InitStruct.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStruct.DMA_MemoryBaseAddr = (uint32_t)&adcbuf;
DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStruct.DMA_BufferSize = lenthof(adcbuf);
DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
DMA_InitStruct.DMA_Mode = DMA_Mode_Circular;
DMA_InitStruct.DMA_Priority = DMA_Priority_High;
DMA_InitStruct.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStruct);
DMA_ITConfig(DMA1_Channel1, DMA_IT_TC,ENABLE);
DMA_Cmd(DMA1_Channel1, ENABLE);
//ADC
ADC_DeInit(ADC1);
ADC_InitTypeDef ADC_InitStruct;
ADC_StructInit(&ADC_InitStruct);
ADC_InitStruct.ADC_Resolution = ADC_Resolution_10b;
ADC_InitStruct.ADC_ContinuousConvMode = ENABLE;
ADC_InitStruct.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStruct.ADC_ScanDirection = ADC_ScanDirection_Backward;
ADC_Init(ADC1, &ADC_InitStruct);
ADC_ChannelConfig(ADC1, ADC_Channel_2 , ADC_SampleTime_239_5Cycles);
/* ADC DMA request in circular mode */
ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
/* Enable ADC_DMA */
ADC_DMACmd(ADC1, ENABLE);
ADC_GetCalibrationFactor(ADC1);
ADC_ClockModeConfig(ADC1, ADC_ClockMode_SynClkDiv4);
//start adc
ADC_Cmd(ADC1, ENABLE);
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN));
}
