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- 2018-5-26
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- 3 小时
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楼主 |
发表于 2018-5-26 17:38:43
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main.c
int ADC_ConvertedValue;
int main(void)
{
u16 i=0;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
MYDMA_Config(DMA2_Stream0,DMA_Channel_0,(u32)&ADC1->DR ,(u32)&ADC_ConvertedValue,1);
delay_init(168);
uart_init(115200);
LED_Init();
LCD_Init();
Adc_Init();
while(1)
{
LCD_ShowString(30,170,200,16,16,"Start Transimit....");
ADC_DMACmd(ADC1,ENABLE);
MYDMA_Enable(DMA2_Stream0,1);
LCD_ShowxNum(134,240,ADC_ConvertedValue,5,16,0);
delay_ms(50);
LED1=!LED1;
}
}
adc.c
void Adc_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
ADC_InitTypeDef ADC_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,DISABLE);
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div4;
ADC_CommonInit(&ADC_CommonInitStructure);
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion = 1;
ADC_Init(ADC1, &ADC_InitStructure);
ADC_Cmd(ADC1, ENABLE);
}
u16 Get_Adc(u8 ch)
{
ADC_RegularChannelConfig(ADC1,ch, 1, ADC_SampleTime_480Cycles );
ADC_SoftwareStartConv(ADC1);
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC ));
return ADC_GetConversionValue(ADC1);
}
dma.c
void MYDMA_Config(DMA_Stream_TypeDef *DMA_Streamx,u32 chx,u32 par,u32 mar,u16 ndtr)
{
DMA_InitTypeDef DMA_InitStructure;
if((u32)DMA_Streamx>(u32)DMA2)/
{
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2,ENABLE);
}else
{
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1,ENABLE);
}
DMA_DeInit(DMA_Streamx);
while (DMA_GetCmdStatus(DMA_Streamx) != DISABLE){}
DMA_InitStructure.DMA_Channel = chx;
DMA_InitStructure.DMA_PeripheralBaseAddr = par;
DMA_InitStructure.DMA_Memory0BaseAddr = mar;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
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_Full;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single ;
DMA_InitStructure.DMA_PeripheralBurst = DMA_MemoryBurst_Single ;
DMA_Init(DMA_Streamx, &DMA_InitStructure);
}
void MYDMA_Enable(DMA_Stream_TypeDef *DMA_Streamx,u16 ndtr)
{
DMA_Cmd(DMA_Streamx, DISABLE);
while (DMA_GetCmdStatus(DMA_Streamx) != DISABLE){}
DMA_SetCurrDataCounter(DMA_Streamx,ndtr);
DMA_Cmd(DMA_Streamx, ENABLE);
}
这是代码 求大神帮我找找错误 |
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