新手求助~~~STM32F051 ADC出来的数据一直为0【悬赏问答】
用STM32F051调试AD转换程序，出来的数据一直是0.0V，不知道哪边有问题，以下是程序代码，请游过的大虾帮帮忙呗，万分感激！！#include "stm32f0xx.h" //这个头文件包括STM32F0xx所有外围寄存器、位、内存映射的定义
#include "delay.h"
#include "type_def.h"
#include
#define USART1_BaudRate 115200
#define ADC1_DR_Address 0x40012440
vu16 AD_Value; //用来存放ADC转换结果，也是DMA的目标地址
#ifdef __GNUC__
/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
set to 'Yes') calls __io_putchar() */
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
/*GPIO管脚的配置
选用ADC的通道9，分别对应的管脚为PB1
串口使用USART1其中TX为PA9，RX为PA10 */
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
//PB1 作为模拟通道输入引脚
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; //模拟输入引脚
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
/*USART1管脚的配置
串口使用USART1其中TX为PA9，RX为PA10 */
void USART_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE );
GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_1);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_1);
/*
* USART1_TX -> PA9 , USART1_RX -> PA10
*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = USART1_BaudRate;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
}
/*配置ADC1*/
void ADC1_Configuration(void)
{
ADC_InitTypeDef ADC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE );
ADC_DeInit(ADC1); //将外设 ADC1 的全部寄存器重设为缺省值
ADC_StructInit(&ADC_InitStructure);
/* ADC1 configuration ------------------------------------------------------*/
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b; //ADC1分辨率12位
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //模数转换工作在连续转换模式
ADC_InitStructure.ADC_ExternalTrigConvEdge=ADC_ExternalTrigConvEdge_None; //外部触发转换关闭
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //ADC数据右对齐
ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Backward; //顺序进行规则转换的ADC通道的数目
ADC_Init(ADC1, &ADC_InitStructure); //根据ADC_InitStruct中指定的参数初始化外设ADCx的寄存器
ADC_ChannelConfig(ADC1, ADC_Channel_9, ADC_SampleTime_239_5Cycles );
ADC_GetCalibrationFactor(ADC1);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE); //使能指定的ADC1
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN)); //获取指定ADC1的校准程序,设置状态则等待
ADC_StartOfConversion(ADC1);
}
/*配置DMA*/
void DMA_Configuration(void)
{
/* ADC1 DMA1 Channel Config */
DMA_InitTypeDef DMA_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
DMA_DeInit(DMA1_Channel1); //将DMA的通道1寄存器重设为缺省值
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)ADC1_DR_Address; //DMA外设ADC基地址
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)AD_Value; //DMA内存基地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //内存作为数据传输的目的地
DMA_InitStructure.DMA_BufferSize = 2; //DMA通道的DMA缓存的大小
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设地址寄存器不变
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //内存地址寄存器递增
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //数据宽度为16位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //数据宽度为16位
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //工作在循环缓存模式
DMA_InitStructure.DMA_Priority = DMA_Priority_High; //DMA通道 x拥有高优先级
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //DMA通道x没有设置为内存到内存传输
DMA_Init(DMA1_Channel1, &DMA_InitStructure); //根据DMA_InitStruct中指定的参数初始化DMA的通道
DMA_Cmd(DMA1_Channel1, ENABLE);
ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
ADC_DMACmd(ADC1, ENABLE);
}
//配置所有外设
void Init_All_Periph(void)
{
GPIO_Configuration();
USART_Configuration();
DMA_Configuration();
ADC1_Configuration();
}
/*获取ADC的值，将二进制换算为十进制*/
u16 GetVolt(u16 advalue)
{
return (u16)(advalue * 330 / 4096); //求的结果扩大了100倍，方便下面求出小数
}
PUTCHAR_PROTOTYPE
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */
USART_SendData(USART1, (uint8_t) ch);
/* Loop until the end of transmission */
while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
{}
return ch;
}
int main(void)
{
u16 value;
Init_All_Periph();
while(1)
{
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);//等待传输完成否则第一位数据容易丢失
value = GetVolt(AD_Value);
printf("value:\t%d.%dv\n ",value/100,value%100) ;
Delay_ms(100);
}
}
回复:新手求助~~~STM32F051 ADC出来的数据一直为0【悬赏问答】
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)AD_Value;//DMA内存基地址这句话有问题，你应该把AD-Value的地址赋值过去，而不是把AD_Value的内容赋值过去，改成这样试试 DMA_InitStructure.DMA_MemoryBaseAddr = (&AD_Value);
RE:新手求助~~~STM32F051 ADC出来的数据一直为0
自己顶啊:'(RE:新手求助~~~STM32F051 ADC出来的数据一直为0
在线等大婶的到来回复:新手求助~~~STM32F051 ADC出来的数据一直为0【悬赏问答】
社区第3期悬赏问答活动开始咯~详见：https://www.stmcu.org.cn/bbs/article_1188_456334.html无论你是大神还是大婶，都快来帮忙吧！:D
RE:新手求助~~~STM32F051 ADC出来的数据一直为0【悬赏问答】
不知到你有没有好好的看一下,官方的例程呢#define ADC1_DR_Address 0x40012440
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
__IO uint16_t ADC1ConvertedValue = 0, ADC1ConvertedVoltage = 0;
__IO uint16_t RegularConvData_Tab;
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f0xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f0xx.c file
*/
/* LCD Display init */
Display_Init();
/* ADC1 and DMA configuration */
ADC1_DMA_Config();
/* Infinite loop */
while (1)
{
/* Test DMA1 TC flag */
while((DMA_GetFlagStatus(DMA1_FLAG_TC1)) == RESET );
/* Clear DMA TC flag */
DMA_ClearFlag(DMA1_FLAG_TC1);
/* Display converted data on the LCD */
Display();
}
}
/**
* @brief ADC1 channel with DMA configuration
* @param None
* @retval None
*/
void ADC1_DMA_Config(void)
{
ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
/* ADC1 DeInit */
ADC_DeInit(ADC1);
/* GPIOC Periph clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);
/* ADC1 Periph clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
/* DMA1 clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);
/* Configure ADC Channel11 as analog input */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOC, &GPIO_InitStructure);
/* DMA1 Channel1 Config */
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)RegularConvData_Tab;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 4;
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_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
/* DMA1 Channel1 enable */
DMA_Cmd(DMA1_Channel1, ENABLE);
/* ADC DMA request in circular mode */
ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
/* Enable ADC_DMA */
ADC_DMACmd(ADC1, ENABLE);
/* Initialize ADC structure */
ADC_StructInit(&ADC_InitStructure);
/* Configure the ADC1 in continous mode withe a resolutuion equal to 12 bits */
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Backward;
ADC_Init(ADC1, &ADC_InitStructure);
/* Convert the ADC1 Channel 1 with 55.5 Cycles as sampling time */
ADC_ChannelConfig(ADC1, ADC_Channel_11 , ADC_SampleTime_55_5Cycles);
/* Convert the ADC1 temperature sensor with 55.5 Cycles as sampling time */
ADC_ChannelConfig(ADC1, ADC_Channel_TempSensor , ADC_SampleTime_55_5Cycles);
ADC_TempSensorCmd(ENABLE);
/* Convert the ADC1 Vref with 55.5 Cycles as sampling time */
ADC_ChannelConfig(ADC1, ADC_Channel_Vrefint , ADC_SampleTime_55_5Cycles);
ADC_VrefintCmd(ENABLE);
/* Convert the ADC1 Vbat with 55.5 Cycles as sampling time */
ADC_ChannelConfig(ADC1, ADC_Channel_Vbat , ADC_SampleTime_55_5Cycles);
ADC_VbatCmd(ENABLE);
/* ADC Calibration */
ADC_GetCalibrationFactor(ADC1);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* Wait the ADCEN falg */
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN));
/* ADC1 regular Software Start Conv */
ADC_StartOfConversion(ADC1);
}
/**
* @brief Display ADC converted value on LCD
* @param None
* @retval None
*/
void Display(void)
{
uint32_t v=0,mv=0;
uint8_t text,index;
/* Set the LCD Back Color and Text Color*/
LCD_SetBackColor(White);
LCD_SetTextColor(Green);
for(index=0;index
RE:新手求助~~~STM32F051 ADC出来的数据一直为0【悬赏问答】
不懂，学习学习。RE:新手求助~~~STM32F051 ADC出来的数据一直为0【悬赏问答】
尝试吧DMA关掉，然后一步一步调试观察。:DRE:新手求助~~~STM32F051 ADC出来的数据一直为0【悬赏问答】
6楼说的对，我看官方的是个数组，数组名本身就是个地址，而你的AD_VALUE只是个数据！所以没有数据传到AD_VALUE这个变量，只能是0，DMA只是负,内存和CPU ,内存和内存，内存和外设通道之间的数据传输，其实你想得到的AD_VALUE值，是DMA负责从AD通道寄存器那取回来的，其实你也可以自己取，等它AD转换完，你自己手动就可以数据寄存器中拿回来！RE:新手求助~~~STM32F051 ADC出来的数据一直为0【悬赏问答】
我用没问题，1年了，不知道是否还需要回答？
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