【原创】STM32F407的多通道ADC_DMA配置，四通道

wjandsq · 2015-06-16T10:20:50+00:00

/** : H* m3 ^. p6 B9 M) x! [ * @brief ADC_Config' E: i( ^. f5 \3 a8 I" d * @note This function Configure the ADC peripheral 5 \% p0 J7 {. I. O$ Z * 1) Enable peripheral clocks / N9 k2 j) W) X * 2) Configure ADC Channel 12、8、13、9 pin as analog input$ T, ^' P) z5 ?8 j * 3) DMA2_Stream0 channel0 configuration/ g/ F3 v8 v4 G5 B- A9 F( @2 t b * 4) Configure ADC1 Channel 12、8、13、9(PC2 PC3 PB0 PB1) : @( o; P e$ j/ W7 ? * @param None 6 r' b+ b7 M q9 r4 U( s6 y * @retval None; O; r: W- B9 X( I- J/ ^" U */4 k, s8 n% j6 X& w void ADC_Config()+ [" `' s% O# a+ k { " s" h. |" ~ k& n GPIO_InitTypeDef GPIO_InitStruct;0 {8 e) ^5 g/ r' \1 |( G ADC_InitTypeDef ADC_InitStruct;8 F% j0 T: ]% e4 q ADC_CommonInitTypeDef ADC_CommonInitStruct; / Y5 U9 `% C- ~( | DMA_InitTypeDef DMA_InitStruct;* ?' j# A9 T- r& o. j3 t : H! L# u+ f, t3 A9 @) H RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_GPIOC, ENABLE); " {) Y0 i& }2 N( _: S RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE); 0 A5 S+ N* y8 z9 E0 Q' ^, Y ADC_DeInit();) e6 C# X: ]: \+ t RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG,ENABLE); ( A9 `& B, L. l+ ` RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);5 M7 }: B- j8 S" e 2 v/ F) D, E2 d8 q9 H DMA_InitStruct.DMA_Channel = DMA_Channel_0; + c, d: m8 T* V" h! Z DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)(&ADC1->DR); 6 {, ~9 y" c" o9 F0 E DMA_InitStruct.DMA_Memory0BaseAddr = (uint32_t)(&ADC_Value[0][0]);, a( r) g4 ~1 k3 A! Z DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralToMemory;0 g& E3 a3 j0 y7 e# r DMA_InitStruct.DMA_BufferSize = 40;7 Y {* G: M; [7 h0 ?. b8 ]0 ] DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable; : n: X2 Y: A" s2 o4 P8 } DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable; ; r, W) z, G5 T l# T* m9 T3 a' h0 w DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; ; O; l2 @) x F/ Y5 [ DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; 9 g& W) N& K7 j1 K j DMA_InitStruct.DMA_Mode = DMA_Mode_Circular;3 g/ U9 P* _5 H' s7 D/ q5 _ DMA_InitStruct.DMA_Priority = DMA_Priority_Low;7 ? }# O! l$ ^& A6 ^8 W* V DMA_InitStruct.DMA_FIFOMode = DMA_FIFOMode_Disable; p' x" X, [# `& |5 }. m7 p% q a DMA_InitStruct.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;: m1 f, X' W/ j3 e: t* ~' R5 ?. h DMA_InitStruct.DMA_MemoryBurst = DMA_MemoryBurst_Single;$ [( }1 P4 h5 v; P# ^' Y DMA_InitStruct.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; . H- h* |" D6 v7 S- o( K+ A DMA_Init(DMA2_Stream0, &DMA_InitStruct);1 X, h$ |: f! J( S% k DMA_Cmd(DMA2_Stream0, ENABLE);% D" }2 h* v1 ~ D& C * d1 C$ x1 e% Q3 K) G- W DMA_ITConfig(DMA2_Stream0, DMA_IT_TC, ENABLE); & Z) a% |, D6 s3 H NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream0_IRQn;8 W9 n& T! ^; S: J. S NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; 1 L; H8 [6 M Y$ M& i+ @3 z NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;7 k! n' c2 T+ r NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; % X; F; L; {0 a0 s1 h% J/ q6 M NVIC_Init(&NVIC_InitStructure);0 L+ S4 x# T( k- L% R - D* B4 e* R% K+ C2 i /*# A8 }" G' J6 e+ \8 b& f- p# b PC2: ADC_Channel_12 --> AIW0 (0～5V)8 `* S1 N( }$ T; f: T4 U$ i! ? PB0: ADC_Channel_8 --> AIW2 (0～5V) 8 z; A7 x. h- d0 z. T/ g PC3: ADC_Channel_13 --> AIW4 (0～5V) . Z, B9 g2 n/ x" N PB1: ADC_Channel_9 --> AIW6 (0～5V) # N8 J1 h* {2 `- a9 Z$ ~! @ */& c( W$ ~( ~; q+ _ GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1; 1 @1 `; V% i3 |% v GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AN;; x6 { |9 e1 k2 w/ j+ A GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL; 3 P+ j y# y( J) K/ b; {7 j% r GPIO_Init(GPIOB, &GPIO_InitStruct);. F# A9 E( T2 B: m 4 i$ C Y$ m$ P GPIO_InitStruct.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;' F8 D& {. W8 `/ x' B GPIO_Init(GPIOC, &GPIO_InitStruct);& V8 l' |% {3 K5 g3 m 2 G- ?/ Z! {$ N( ]. i /* ADC Common Init **********************************************************/& M" ?$ _2 d9 w- m9 q /* 设置ADC工作在独立模式 */( z, ~6 ]6 c, E9 u ADC_CommonInitStruct.ADC_Mode = ADC_Mode_Independent; , q! u$ O# c' W \7 ?. z ADC_CommonInitStruct.ADC_Prescaler = ADC_Prescaler_Div6;6 U) |7 E6 m; j& Y ADC_CommonInitStruct.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;# @1 H) J& a/ _; } ADC_CommonInitStruct.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;5 n+ ]) |8 I: @; [ ADC_CommonInit(&ADC_CommonInitStruct);! S6 V) N2 |4 Q; ~ ' n* C$ M- N, n0 _! B$ t8 v5 j4 P: ]- B /* ADC1 Init ****************************************************************/ 0 c: y) y8 y/ t# r! b5 } ADC_StructInit(&ADC_InitStruct); % L" Z1 S: R. R3 H& q /* 规定AD转换工作在扫描模式，即对多个通道采样 */, v6 L' N& k# f8 h* n ADC_InitStruct.ADC_ScanConvMode = ENABLE;* |# z4 X" I$ Z$ d% s, ^$ y /* 设定AD转换在连续模式(ENABLE) 单次转换模式(DISABLE) */, C" g. m! [+ ~1 O Y0 Q$ E& ^1 @ ADC_InitStruct.ADC_ContinuousConvMode = ENABLE; 7 B' m4 n1 B2 A0 j! \% x# A6 Q# J /* 不使用外部触发转换 */. N8 Y; ~1 J* A+ X6 h ADC_InitStruct.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None; 2 I% l+ N9 [" H0 G /* 不使用外部触发转换时，该设置无效 *// R/ t$ C4 g( |7 D; i% o' { ADC_InitStruct.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1; 0 z1 j K- p5 l% F* r /* 采集的数据在寄存器中以右对齐的方式存放 */ p: \9 j" s9 T+ \ ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;. M+ V: h: e/ r8 i5 i' @) d /* 设定要转换的AD通道数目，这里是PC2 PC3 PB0 PB1 */: D1 r. R9 ]* r) |+ k9 @ ADC_InitStruct.ADC_NbrOfConversion = 4; # c3 R0 u _4 t7 @4 v4 s2 }& Q % v6 N) F- B( y! t ADC_Init(ADC1,&ADC_InitStruct); ( U- x0 p# k) ~ & L, Q0 g0 W' W /* PC2选择Rank 1，AD转换数据传输到ADC_Value[0] --> AIW0 */ 6 X( a/ ~6 f$ o6 c5 z4 G ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 1, ADC_SampleTime_15Cycles); ( _! W0 H) Q: @7 p6 D /* PB0选择Rank 2，AD转换数据传输到ADC_Value[1] --> AIW2 */4 Z% v0 `/ {; S9 P; h2 C ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 2, ADC_SampleTime_15Cycles);( q3 ^8 S) N" N# O& G2 h /* PC3选择Rank 3，AD转换数据传输到ADC_Value[2] --> AIW4 */( _, e) ^7 Z: y% }% e2 k/ o: r ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 3, ADC_SampleTime_15Cycles);. }) `' F+ t- R5 E /* PB1选择Rank 4，AD转换数据传输到ADC_Value[3] --> AIW6 */ 8 i0 D7 _* ~& s& m ADC_RegularChannelConfig(ADC1, ADC_Channel_9, 4, ADC_SampleTime_15Cycles);+ g2 H. }. |: n: ~ S! x7 ~6 k& F9 v ! w# f$ \ @! T3 l /* Enable DMA request after last transfer (Single-ADC mode) */ # l- W. U$ a% p5 c$ E# `) K. P0 t ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);6 r6 B, i! f& o6 F0 n- W" P& E/ B ADC_DMACmd(ADC1, ENABLE); " D S8 B$ g2 S: ?) r% v ADC_Cmd(ADC1, ENABLE);5 e: T: Z6 u" W5 v4 k$ o ADC_SoftwareStartConv(ADC1);) ~8 p, t1 d( B, Z$ } 5 p6 a! J$ U5 `! C Q, D } : |/ @, \6 E/ O: }2 W6 ^' w( Y # Z0 Z4 g9 N; s & @% e$ d! K1 V3 }" E

[复制链接]

wjandsq 发布时间：2015-6-16 18:20

技术帖
文章封面:	-
文章简介:	-

/**
  * @brief  ADC_Config
  * @note This function Configure the ADC peripheral
  *       1) Enable peripheral clocks
  *       2) Configure ADC Channel 12、8、13、9 pin as analog input
  *       3) DMA2_Stream0 channel0 configuration
  *       4) Configure ADC1 Channel 12、8、13、9(PC2 PC3 PB0 PB1)
  * @param  None
  * @retval None
  */
void ADC_Config()
{
  GPIO_InitTypeDef GPIO_InitStruct;
  ADC_InitTypeDef ADC_InitStruct;
  ADC_CommonInitTypeDef ADC_CommonInitStruct;
  DMA_InitTypeDef DMA_InitStruct;

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_GPIOC, ENABLE);
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
  ADC_DeInit();
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG,ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);

  DMA_InitStruct.DMA_Channel = DMA_Channel_0;
  DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)(&ADC1->DR);
  DMA_InitStruct.DMA_Memory0BaseAddr = (uint32_t)(&ADC_Value[0][0]);
  DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralToMemory;
  DMA_InitStruct.DMA_BufferSize = 40;
  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_HalfWord;
  DMA_InitStruct.DMA_Mode = DMA_Mode_Circular;
  DMA_InitStruct.DMA_Priority = DMA_Priority_Low;
  DMA_InitStruct.DMA_FIFOMode = DMA_FIFOMode_Disable;
  DMA_InitStruct.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
  DMA_InitStruct.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_InitStruct.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  DMA_Init(DMA2_Stream0, &DMA_InitStruct);
  DMA_Cmd(DMA2_Stream0, ENABLE);

  DMA_ITConfig(DMA2_Stream0, DMA_IT_TC, ENABLE);
  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);

  /*
PC2: ADC_Channel_12 --> AIW0 (0～5V)
PB0: ADC_Channel_8  --> AIW2 (0～5V)
PC3: ADC_Channel_13 --> AIW4 (0～5V)
PB1: ADC_Channel_9  --> AIW6 (0～5V)
*/
  GPIO_InitStruct.GPIO_Pin  = GPIO_Pin_0 | GPIO_Pin_1;
  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOB, &GPIO_InitStruct);

  GPIO_InitStruct.GPIO_Pin  = GPIO_Pin_2 | GPIO_Pin_3;
  GPIO_Init(GPIOC, &GPIO_InitStruct);

  /* ADC Common Init **********************************************************/
  /* 设置ADC工作在独立模式 */
  ADC_CommonInitStruct.ADC_Mode = ADC_Mode_Independent;
  ADC_CommonInitStruct.ADC_Prescaler = ADC_Prescaler_Div6;
  ADC_CommonInitStruct.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
  ADC_CommonInitStruct.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
  ADC_CommonInit(&ADC_CommonInitStruct);

  /* ADC1 Init ****************************************************************/
  ADC_StructInit(&ADC_InitStruct);
  /* 规定AD转换工作在扫描模式，即对多个通道采样 */
  ADC_InitStruct.ADC_ScanConvMode = ENABLE;
  /* 设定AD转换在连续模式(ENABLE) 单次转换模式(DISABLE) */
  ADC_InitStruct.ADC_ContinuousConvMode = ENABLE;
  /* 不使用外部触发转换 */
  ADC_InitStruct.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
  /* 不使用外部触发转换时，该设置无效 */
  ADC_InitStruct.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
  /* 采集的数据在寄存器中以右对齐的方式存放 */
  ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
  /* 设定要转换的AD通道数目，这里是PC2 PC3 PB0 PB1 */
  ADC_InitStruct.ADC_NbrOfConversion = 4;

  ADC_Init(ADC1,&ADC_InitStruct);

  /* PC2选择Rank 1，AD转换数据传输到ADC_Value[0] --> AIW0 */
  ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 1, ADC_SampleTime_15Cycles);
  /* PB0选择Rank 2，AD转换数据传输到ADC_Value[1] --> AIW2 */
  ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 2, ADC_SampleTime_15Cycles);
  /* PC3选择Rank 3，AD转换数据传输到ADC_Value[2] --> AIW4 */
  ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 3, ADC_SampleTime_15Cycles);
  /* PB1选择Rank 4，AD转换数据传输到ADC_Value[3] --> AIW6 */
  ADC_RegularChannelConfig(ADC1, ADC_Channel_9, 4, ADC_SampleTime_15Cycles);

  /* Enable DMA request after last transfer (Single-ADC mode) */
  ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
  ADC_DMACmd(ADC1, ENABLE);
  ADC_Cmd(ADC1, ENABLE);
  ADC_SoftwareStartConv(ADC1);

}

赞收藏 1 评论6 发布时间：2015-6-16 18:20

6个回答

你好我好大家好！回答时间：2015-6-17 10:54:17

帮顶

赞评论

semon12345 回答时间：2015-6-17 14:50:06

看着有点头晕。

赞评论

wjandsq 回答时间：2015-6-17 16:05:00

本帖最后由 wjandsq 于 2015-6-18 18:44 编辑

可以声明一个数组ADC_Value[10][4];
DMA_InitStruct.DMA_BufferSize = 4; 改为
DMA_InitStruct.DMA_BufferSize = 40;
这样 PC2 PB0 PC3 PB1 采集到的数据依次放在
ADC_Value[0][0]、ADC_Value[0][1]、ADC_Value[0][2]、ADC_Value[0][3]
ADC_Value[1][0]、ADC_Value[1][1]、ADC_Value[1][2]、ADC_Value[1][3]
....
ADC_Value[8][0]、ADC_Value[8][1]、ADC_Value[8][2]、ADC_Value[8][3]ADC_Value[9][0]、ADC_Value[9][1]、ADC_Value[9][2]、ADC_Value[9][3]

赞评论

Paderboy 回答时间：2015-6-17 21:46:15

多谢分享。。

赞评论

wjandsq 回答时间：2015-6-18 18:51:58

为避免多通道数据采集出现错位，没有使用循环模式，转换完毕自动停止，进行均值滤波后，
可以重新设置DMA传输的地址和传输数目，重新启动ADC转换，这样能控制ADC转换的频率。

if(Flag_ADC_Finished){
   Flag_ADC_Finished = 0;
   DMA2_Stream0->M0AR = (uint32_t)(&ADC_Value[0][0]);
   DMA2_Stream0->NDTR = 40;
   DMA_Cmd(DMA2_Stream0, ENABLE);
   ADC_Cmd(ADC1, ENABLE);
   ADC_SoftwareStartConv(ADC1);
}