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我给你一个可以用的：
[mw_shl_code=c,true]static unsigned short g_adc_data[128];
static unsigned char _update_flag;
static void ADC_DMA_Config()
{
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
/* Enable ADC1 DMA NVIC Channel */
NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
DMA_DeInit(DMA2_Stream0);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_BASE+0x4c;//ADC1->DR cause error!!!
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_Memory0BaseAddr = (u32)g_adc_data;
DMA_InitStructure.DMA_BufferSize = 128;
DMA_Init(DMA2_Stream0, &DMA_InitStructure);
DMA_ITConfig(DMA2_Stream0, DMA_IT_TC, ENABLE);
DMA_Cmd(DMA2_Stream0, ENABLE);
}
static void ADC_TIM2_Config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
TIM_TimeBaseStructure.TIM_Prescaler = 30; // 1us
TIM_TimeBaseStructure.TIM_ClockDivision = 0; // 60 / (1+x) = 60
TIM_TimeBaseStructure.TIM_Period = 2000; // 2ms
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 1000;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OC2Init(TIM2, & TIM_OCInitStructure);
TIM_Cmd(TIM2, ENABLE);
TIM_InternalClockConfig(TIM2);
TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);
TIM_UpdateDisableConfig(TIM2, DISABLE);
}
static void ADC_GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_4;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
static void ADC_Config(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
ADC_CommonInitStruct.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStruct.ADC_Prescaler = ADC_Prescaler_Div2;
ADC_CommonInitStruct.ADC_DMAAccessMode = ADC_TwoSamplingDelay_20Cycles;
ADC_CommonInitStruct.ADC_TwoSamplingDelay = ADC_DMAAccessMode_1;
ADC_CommonInit(&ADC_CommonInitStruct);
// AD init
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_CC2;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising; // <-> timer 8
ADC_InitStructure.ADC_NbrOfConversion = 2;
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_Init(ADC1, &ADC_InitStructure);
ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 1,ADC_SampleTime_480Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_4, 2,ADC_SampleTime_480Cycles);
ADC_DMACmd(ADC1, ENABLE);
ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
ADC_Cmd(ADC1,ENABLE);
ADC_SoftwareStartConv(ADC1);
}
void adc_temp_init(void)
{
ADC_DMA_Config();
ADC_GPIO_Config();
ADC_Config();
ADC_TIM2_Config();
}[/mw_shl_code]
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发表于 2014-5-11 22:22:01
楼主
发表于 2014-5-11 22:31:14
