部分电路结构图如下：
使用了NX3L4051模块对ADC采样通道进行选择，所以程序里也有体现。
目前就是读数一直是0，感觉自己的配置什么的也好像没有问题，检查了好多遍。
但是还是有疑问，我的程序好像没有判断什么时候DMA可以开始传输数据以及ADC什么时候采样好，还请各位大神给出建议，如果能够找到我的问题，那简直太感谢了。
先谢谢各位能够抽空看看我的程序了，非常感谢！
主程序如下：
/**
#include "stm32f10x.h"
#include "led.h"
#include "usart.h"
#include "adc.h"
uint8_t curr_state=0;
uint8_t counter=0;
uint8_t head;
uint8_t dataADC[25];
extern __IO uint16_t ADC_ConvertedValue;
void Delay(__IO u32 nCount);
int main(void)
{
/* USART1 config 115200 8-N-1 */
USART1_Config();
ADC1_Init();
while(1)
{
switch(curr_state){
case 0:
head = 0x2A;
dataADC[counter]=0x2A;
counter++;
GPIO_WriteBit(GPIOB, GPIO_Pin_0, Bit_RESET);
GPIO_WriteBit(GPIOA, GPIO_Pin_5, Bit_RESET);
GPIO_WriteBit(GPIOA, GPIO_Pin_4, Bit_RESET);
GPIO_WriteBit(GPIOA, GPIO_Pin_3, Bit_RESET);
Delay(2000);
dataADC[counter]= ADC_ConvertedValue;
//dataADC[counter]=(uint8_t)(ADC_ConvertedValue & 0xFF);
dataADC[counter+1]=(uint8_t)((ADC_ConvertedValue >>8 )& 0xFF);
counter+=2;//2
Delay(20);
curr_state=1;
break;
case 1:
GPIO_WriteBit(GPIOB, GPIO_Pin_0, Bit_RESET);
GPIO_WriteBit(GPIOA, GPIO_Pin_5, Bit_SET);
GPIO_WriteBit(GPIOA, GPIO_Pin_4, Bit_RESET);
GPIO_WriteBit(GPIOA, GPIO_Pin_3, Bit_RESET);
Delay(2000);
dataADC[counter]=(uint8_t)(ADC_ConvertedValue & 0xFF);
dataADC[counter+1]=(uint8_t)((ADC_ConvertedValue >>8 )& 0xFF);
counter+=2;//4
Delay(20);
curr_state=2;
case 2:
GPIO_WriteBit(GPIOB, GPIO_Pin_0, Bit_RESET);
GPIO_WriteBit(GPIOA, GPIO_Pin_5, Bit_RESET);
GPIO_WriteBit(GPIOA, GPIO_Pin_4, Bit_RESET);
GPIO_WriteBit(GPIOA, GPIO_Pin_3, Bit_SET);
Delay(2000);
dataADC[counter]=(uint8_t)(ADC_ConvertedValue & 0xFF);
dataADC[counter+1]=(uint8_t)((ADC_ConvertedValue >>8 )& 0xFF);
counter+=2;//6
Delay(20);
curr_state=3;
case 3:
GPIO_WriteBit(GPIOB, GPIO_Pin_0, Bit_RESET);
GPIO_WriteBit(GPIOA, GPIO_Pin_5, Bit_RESET);
GPIO_WriteBit(GPIOA, GPIO_Pin_4, Bit_SET);
GPIO_WriteBit(GPIOA, GPIO_Pin_3, Bit_RESET);
Delay(2000);
dataADC[counter]=(uint8_t)(ADC_ConvertedValue & 0xFF);
dataADC[counter+1]=(uint8_t)((ADC_ConvertedValue >>8 )& 0xFF);
counter+=2;//8
Delay(20);
curr_state=4;
case 4:
GPIO_WriteBit(GPIOB, GPIO_Pin_0, Bit_RESET);
GPIO_WriteBit(GPIOA, GPIO_Pin_5, Bit_RESET);
GPIO_WriteBit(GPIOA, GPIO_Pin_4, Bit_SET);
GPIO_WriteBit(GPIOA, GPIO_Pin_3, Bit_SET);
Delay(2000);
dataADC[counter]=(uint8_t)(ADC_ConvertedValue & 0xFF);
dataADC[counter+1]=(uint8_t)((ADC_ConvertedValue >>8 )& 0xFF);
counter+=2;//10
Delay(20);
curr_state=5;
case 5:
counter=0;
dataADC[1] = ADC_GetConversionValue(ADC1);
//dataADC[2] = Get_Adc(1);
UART1_Send_Array(dataADC,11);
Delay(2000);
// printf("\r\n The current AD value = 0x%04X \r\n", ADC_ConvertedValue[0]);
curr_state=0;
break;
default:
break;
}
}
}
void Delay(__IO uint32_t nCount)
{
for(; nCount != 0; nCount--);
}
ADC配置程序如下：
#include "adc.h"
#include "usart.h"
#define ADC1_DR_Address ((u32)0x40012400+0x4c)
__IO uint16_t ADC_ConvertedValue;
*/ **ADC1 GPIO Configuration
PA2 ------> ADC1_IN2
PB1 ------> ADC1_IN9
*/
static void ADC1_GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable DMA clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
/* Enable ADC1 and GPIOA and GPIOB clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC, ENABLE);
/*Configure GPIO pins : PC14 PC15 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14|GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
/* Configure PA.03|4|5 as analog output */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure PB.00 as analog output */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* Configure PA.02 as analog input */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure PB.01 as analog input */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
static void ADC1_Mode_Config(void)
{
DMA_InitTypeDef DMA_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
/* DMA channel1 configuration */
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)ADC_ConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = Numberofchannel;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal ;
DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
/* Enable DMA channel1 */
DMA_Cmd(DMA1_Channel1, ENABLE);
/* ADC1 configuration */
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = ENABLE ;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = Numberofchannel;
ADC_Init(ADC1, &ADC_InitStructure);
RCC_ADCCLKConfig(RCC_PCLK2_Div6);
ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 1, ADC_SampleTime_1Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_9, 2, ADC_SampleTime_1Cycles5);
/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1));
/* ADCУ׼ */
ADC_StartCalibration(ADC1);
/* µÈ´ýУ׼Íê³É*/
while(ADC_GetCalibrationStatus(ADC1));
/* ÓÉÓÚûÓвÉÓÃÍⲿ´¥·¢£¬ËùÒÔʹÓÃÈí¼þ´¥·¢ADCת»» */
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
}
void ADC1_Init(void)
{
ADC1_GPIO_Config();
ADC1_Mode_Config();
}
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