/* ALIGN: Data alignement. */
#define ADC_CR2_ALIGN_RIGHT (0 << 11)
#define ADC_CR2_ALIGN_LEFT (1 << 11)
#define ADC_CR2_ALIGN (1 << 11)
/* EOCS: End of conversion selection. */
#define ADC_CR2_EOCS (1 << 10)
/* DDS: DMA disable selection */
#define ADC_CR2_DDS (1 << 9)
/* DMA: Direct memory access mode. (ADC1 and ADC3 only!) */
#define ADC_CR2_DMA (1 << 8)
/* Note: Bits [7:2] are reserved and must be kept at reset value. */
/* CONT: Continous conversion. */
#define ADC_CR2_CONT (1 << 1)
/* ADON: A/D converter On/Off. */
/* Note: If any other bit in this register apart from ADON is changed at the
* same time, then conversion is not triggered. This is to prevent triggering
* an erroneous conversion.
* Conclusion: Must be separately written.
*/
#define ADC_CR2_ADON (1 << 0)
void ADC_DMARequestAfterLastTransferCmd(ADC_TypeDef* ADCx, FunctionalState NewState)
{
/* Check the parameters */
assert_param(IS_ADC_ALL_PERIPH(ADCx));
assert_param(IS_FUNCTIONAL_STATE(NewState));
if (NewState != DISABLE)
{
/* Enable the selected ADC DMA request after last transfer */
ADCx->CR2 |= ADC_CR2_DDS;
}
else
{
/* Disable the selected ADC DMA request after last transfer */
ADCx->CR2 &= (uint32_t)~ADC_CR2_DDS;
}
}
/*
the DMA init and ADC init by DMA read to data_buffer 16 word
*/
======================================================
//ADC pam
uint16_t ADCResult;
//DMA pam
#define ADC1_DR_address ((u32)0x4001244C) //AD轉換結果存放位址定義
#define SampleDepth = 64;
u32 Data_Buffer[SampleDepth];
//=======================
//DMA Channel 1 init
//ADC1 DMA to Data_Buffer 64 Word 32bit
//=======================
void DMA_ADC_Transfer_Reset(void)
{
//開始DMA傳輸
DMA1_Channel1->CCR &= ~(1<<0 font="" hannel="">
DMA1->IFCR |= 0x0000000F; //清除CHANNEL1的4個標誌
DMA1_Channel1->CNDTR = (u16)SampleDepth;//重新設置要設置的DMA傳輸資料量
DMA1_Channel1->CCR |= (1<<0 channel1="" font="" nbsp="">
while(!(DMA1->ISR & DMA1_FLAG_TC1));
DMA1_Channel1->CCR &= ~(1<<0 font="" hannel="" nbsp="">
}
void DMA_ADC_Transfer_Init(void)
{
//DMA_Channel_TypeDef DMA_Channel1;
DMA_InitTypeDef DMA_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_address; //ADC資料寄存器位址
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&Data_Buffer[0];//目標緩衝區位址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //外設是源
DMA_InitStructure.DMA_BufferSize = 0; //設置DMA讀取長度為
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//外設地址不遞增
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //目標緩衝區位址遞增
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;//外設資料寬度
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word; //目標緩衝區資料寬度
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; //DMA模式：Circular迴圈模式/Normal普通模式
DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh; //優先順序
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //記憶體到記憶體模式不使能
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
//DMA_Cmd(DMA1_Channel1, ENABLE);
}
//=======================
//ADC1 init PC0
//in main ...
//while(1)
//{
// uint16_t ADCResult = 0x1234;
//
// ADC_SoftwareStartConv(ADC1);
// while(ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET);
// ADCResult = ADC_GetConversionValue(ADC1);
//}
//=======================
void Adc_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);// enable GPIO_A Clock
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); // enable ADC1 clock
//GPIO_StructInit(&GPIO_InitStructure);
//for ADC1 on PC0 using IN10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; // define the Pin to analog mode
//GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;//
GPIO_Init(GPIOC, &GPIO_InitStructure);
//先初始化IO口
//RCC->APB2ENR|=1<<2 font="" nbsp="">
//GPIOC->CRL&=0XFFFF0000;//PA0 1 2 3 anolog輸入
//通道10/11設置
RCC->APB2ENR|=1<<9 font="" nbsp="">
RCC->APB2RSTR|=1<<9 font="" nbsp="">
RCC->APB2RSTR&=~(1<<9 font="">
RCC->CFGR&=~(3<<14 font="" nbsp="">
//SYSCLK/DIV2=12M ADC時鐘設置為12M,ADC最大時鐘不能超過14M!
//否則將導致ADC準確度下降!
RCC->CFGR|=2<<14 font="">
ADC1->CR1&=0XF0FFFF; //工作模式清零 DUALMOD[19:16] 0000
ADC1->CR1|=0<<16 font="" nbsp="">
ADC1->CR1&=~(1<<8 cr1="" font="" nbsp="">
ADC1->CR2&=~(1<<1 cr2="" font="" nbsp="">
ADC1->CR2&=~(7<<17 111="" font="" nbsp="">
ADC1->CR2|=7<<17 font="" nbsp="">
ADC1->CR2|=1<<20 font="" nbsp="">
ADC1->CR2&=~(1<<11 align="" font="" nbsp="">
ADC1->SQR1&=~(0XF<<20 font="">
ADC1->SQR1&=0<<20 font="" nbsp="">
//設置通道0~3的採樣時間
ADC1->SMPR2&=0XFFFFF000;//通道0,1,2,3採樣時間清空
ADC1->SMPR2|=7<<9 font="" nbsp="">
ADC1->SMPR2|=7<<6 font="" nbsp="">
ADC1->SMPR2|=7<<3 font="" nbsp="">
ADC1->SMPR2|=7<<0 font="" nbsp="">
/* ADC1定期通道0配置 *************************************/
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_239Cycles5);
/* 啟用DMA請求後，最後轉移（單ADC模式）*/
// ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
/* 啟用ADC3 的 DMA */
ADC_DMACmd(ADC1, ENABLE);
ADC1->CR2|=1<<0 1="" cr2="" font="" nbsp="">
// ADC_DMACmd(ADC1, ENABLE);
ADC1->CR2|=1<<3 1="" cr2="" font="" nbsp="">
while(ADC1->CR2&1<<3 0="" cr2="" font="" nbsp="" when="">
//該位元由軟體設置並由硬體清除。在校準寄存器被初始化後該位將被清除。
ADC1->CR2|=1<<2 1="" font="" nbsp="">
while(ADC1->CR2&1<<2 0="" cr2="" font="" nbsp="" when="">
//該位元由軟體設置以開始校準，並在校準結束時由硬體清除
}
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