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- 2019-2-15
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5金钱
主控制芯片采用STM32f030C8T6进行三个通道ADC采集使用的端口分别是PA1,PA4,PA5
采集出来数据为两个最大值，这三个值都不正确，PA4调节电压，打印出来的数据还是可以波动的。
[14:45:37.612]收←◆PA0:4095,PA4:2718,PA5:4095
[14:45:38.112]收←◆PA0:4095,PA4:2714,PA5:4095
[14:45:38.613]收←◆PA0:4095,PA4:2711,PA5:4095
[14:45:39.112]收←◆PA0:4095,PA4:2708,PA5:4095
[14:45:39.612]收←◆PA0:4095,PA4:2719,PA5:4095
[14:45:40.112]收←◆PA0:4095,PA4:2709,PA5:4095
[14:45:40.612]收←◆PA0:4095,PA4:2707,PA5:4095
[14:45:41.112]收←◆PA0:4095,PA4:2713,PA5:4095
[14:45:41.612]收←◆PA0:4095,PA4:2715,PA5:4095
[14:45:42.112]收←◆PA0:4095,PA4:2714,PA5:4095
[14:45:42.612]收←◆PA0:4095,PA4:2716,PA5:4095
[14:45:43.112]收←◆PA0:4095,PA4:2708,PA5:4095
[14:45:43.612]收←◆PA0:4095,PA4:2713,PA5:4095
[14:45:44.112]收←◆PA0:4095,PA4:2715,PA5:4095
[14:45:44.612]收←◆PA0:4095,PA4:2715,PA5:4095
[14:45:45.112]收←◆PA0:4095,PA4:2710,PA5:4095
[14:45:45.612]收←◆PA0:4095,PA4:2710,PA5:4095
具体端口配置代码如下：
/* Private typedef -----------------------------------------------------------*/
/* ADC读取 */
/* Private define ------------------------------------------------------------*/
#include "adc.h"
#include "ADC_libr.h"
//#include "algorithm.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define ADC1_DR_Address ((uint32_t)0x40012440)
__IO uint16_t Read_ADC[3] = {0};
// 局部变量，用于存从flash读到的电压值
__IO float ADC_ConvertedValueLocal;
void ADC1_DMA_Init(void)
{
ADC_InitTypeDef ADC_InitStruct;
DMA_InitTypeDef DMA_InitStruct;
GPIO_InitTypeDef GPIO_InitStruct;
/* ADC1 DeInit */
ADC_DeInit(ADC1);
/* Enable GPIOA clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* ADC1 Periph clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
/* DMA1 clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);
/* Configure PA.01 as analog input */
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_4|GPIO_Pin_5;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOA, &GPIO_InitStruct);
/* DMA1 Channel1 Config */
DMA_DeInit(DMA1_Channel1);
DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address;
DMA_InitStruct.DMA_MemoryBaseAddr = (uint32_t)Read_ADC;
DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStruct.DMA_BufferSize = 3;
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_High;
DMA_InitStruct.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStruct);
/* 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_InitStruct);
/* Configure the ADC1 in continous mode withe a resolutuion equal to 12 bits */
ADC_InitStruct.ADC_Resolution = ADC_Resolution_12b;
// ADC_InitStruct.ADC_ExternalTrigConv = ADC_ExternalTrigConvEdge_None;
ADC_InitStruct.ADC_ContinuousConvMode = ENABLE;
ADC_InitStruct.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStruct.ADC_ScanDirection = ADC_ScanDirection_Backward;
ADC_Init(ADC1, &ADC_InitStruct);
// /* 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_1|ADC_Channel_4|ADC_Channel_5,ADC_SampleTime_55_5Cycles);
// ADC_VrefintCmd(ENABLE);
/* ADC Calibration */
ADC_GetCalibrationFactor(ADC1);
ADC_DMACmd(ADC1, ENABLE);
/* 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);
}
/***
ADC读取测试函数
DS 1 读取PT100的程序
DS 2 读取热电偶的程序
*/
WORD _Read_Temp(BYTE DS)
{
static float read_adc = 100;
static WORD RES = 0;
static WORD Temp_return = 0;
switch(DS)
{
case 1:
read_adc = Read_ADC[0];
Temp_return = read_adc;
break;
case 2:
read_adc = Read_ADC[1];
Temp_return = read_adc;
break;
case 3:
read_adc = Read_ADC[2];
Temp_return = read_adc;
break;
default:
break;
}
return Temp_return;
}
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发表于 2019-4-10 14:47:43
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