本帖最后由 cdshkf 于 2014-5-8 14:34 编辑
我按照楼猪的程序改了改,仅供参考(三个通道我改成了11、12、13),测试没问题。
main函数里:- #include "stm32f10x.h"
- #include <stdio.h>
- /* Private define ------------------------------------------------------------*/
- #define ADC1_DR_Address ((u32)0x4001244C)
- /* Private function prototypes -----------------------------------------------*/
- void ADC_Configuration(void);
- void Timer2_Configuration(void);
- /* Private variables ---------------------------------------------------------*/
- vu16 adc_value[3];
- /*******************************************************************************
- * Function Name : main
- * Description : Main program
- * Input : None
- * Output : None
- * Return : None
- * Attention : None
- *******************************************************************************/
- int main(void)
- {
- ADC_Configuration();
- Timer2_Configuration();
-
-
- while (1)
- {
- }
- }
- /*******************************************************************************
- * Function Name : ADC_Configuration
- * Description : Configure the ADC.
- * Input : None
- * Output : None
- * Return : None
- * Attention : None
- *******************************************************************************/
- void Timer2_Configuration(void)
- {
- TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
- TIM_DeInit(TIM2);
- TIM_TimeBaseStructure.TIM_Period=9;
- TIM_TimeBaseStructure.TIM_Prescaler=35999;
- TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
- TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
- TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStructure);
- TIM_ClearFlag(TIM2,TIM_FLAG_Update);
- TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);
- TIM_Cmd(TIM2,ENABLE);
- }
- void ADC_Configuration(void)
- {
-
- GPIO_InitTypeDef GPIO_InitStructure;
- NVIC_InitTypeDef NVIC_InitStructure;
- DMA_InitTypeDef DMA_InitStructure;
- ADC_InitTypeDef ADC_InitStructure;
- RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOC| RCC_APB2Periph_AFIO, ENABLE);
- RCC_ADCCLKConfig(RCC_PCLK2_Div6);
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
- /* Configure PC0 ()as analog input -------------------------*/
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
- GPIO_Init(GPIOC, &GPIO_InitStructure); //选择端口PC0,最大输出速度50MHZ,模拟输入
-
- /* Configure PC4 (ADC12 Channel4)as analog input -------------------------*/
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
- GPIO_Init(GPIOC, &GPIO_InitStructure); //选择端口PC1,最大输出速度50MHZ,模拟输入
-
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
- GPIO_Init(GPIOC, &GPIO_InitStructure); //选择端口PC2,最大输出速度50MHZ,模拟输入
-
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
- GPIO_Init(GPIOC, &GPIO_InitStructure); //选择端口PC3,最大输出速度50MHZ,模拟输入
-
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
- GPIO_Init(GPIOC, &GPIO_InitStructure); //选择端口PC4,最大输出速度50MHZ,模拟输入
-
- /* Configure one bit for preemption priority */
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
-
- /* Enable the TIM2 Interrupt */
- NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 4;
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- NVIC_Init(&NVIC_InitStructure);
- /* DMA channel1 configuration ----------------------------------------------*/
- DMA_DeInit(DMA1_Channel1);
- DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;//adc1的数据寄存器设备地址,数据手册上有
- DMA_InitStructure.DMA_MemoryBaseAddr = (u32)adc_value;//一个有3个元素数组的首地址
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
- DMA_InitStructure.DMA_BufferSize = 3;
- 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;
- //循环模式开启,Buffer写满后,自动回到初始地址开始传输
- 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);
-
- DMA_ClearFlag(DMA1_FLAG_TC1);
- //配置完成后,启动DMA通道
- DMA_ClearITPendingBit(DMA1_IT_TC1);
- DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);
- DMA_Cmd(DMA1_Channel1, ENABLE);
-
- 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=3;
- ADC_Init(ADC1,&ADC_InitStructure);
-
- ADC_RegularChannelConfig(ADC1,ADC_Channel_11,1,ADC_SampleTime_1Cycles5);
- ADC_RegularChannelConfig(ADC1,ADC_Channel_12,2,ADC_SampleTime_1Cycles5);
- ADC_RegularChannelConfig(ADC1,ADC_Channel_13,3,ADC_SampleTime_1Cycles5);
-
- ADC_DMACmd(ADC1,ENABLE);
- ADC_Cmd(ADC1,ENABLE);
-
- ADC_ResetCalibration(ADC1);
- while(ADC_GetResetCalibrationStatus(ADC1));
- ADC_StartCalibration(ADC1);
- while(ADC_GetCalibrationStatus(ADC1));
- ADC_ClearFlag(ADC1, ADC_FLAG_EOC);
- ADC_SoftwareStartConvCmd(ADC1,DISABLE);
- }
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