121 lines
5.1 KiB
C
121 lines
5.1 KiB
C
/********************************************************/
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// CPU需要：STM32F103--RAM内存不小于64K Flash内存不小于128K
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// 本代码已在STM32F103RDT6、VET6测试通过
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// 编辑日期： 20150909
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// editor by 小小晟
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// 网店： shop182385147.taobao.com
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/********************************************************/
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#include "stm32f10x.h"
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#include "stm32f10x_adc.h"
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#include "stm32f10x_dac.h"
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#include "stm32f10x_dma.h"
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#include <stdio.h>
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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#define ADC1_DR_Address ((uint32_t)0x4001244C) //ADC1 DR寄存器基地址
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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#define N 100 //每个通道采样次数
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#define M 4 //共五个通道
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// 注：ADC为12位模数转换器，只有ADCConvertedValue的低12位有效
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__IO uint16_t ADCConvertedValue[N][M];
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extern u16 PLC_16BIT[12100];
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extern void DAC_out_init(void);
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void RCC_Configuration(void)
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{
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ADC_InitTypeDef ADC_InitStructure; //ADC初始化结构体声明
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DMA_InitTypeDef DMA_InitStructure; //DMA初始化结构体声明
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GPIO_InitTypeDef GPIO_InitStructure;
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/* Enable ADC1 and GPIOC clock */
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOC, ENABLE);
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/* Enable DMA1 clock */
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
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/* Configure PC.00 (ADC Channel10) as analog input -------------------------*/
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//PC0 作为模拟通道10输入引脚
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
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GPIO_Init(GPIOC, &GPIO_InitStructure);
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/* DMA1 channel1 configuration ----------------------------------------------*/
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DMA_DeInit(DMA1_Channel1);
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DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address; //DMA对应的外设基地址
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DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ADCConvertedValue; //内存存储基地址
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DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //DMA的转换模式为SRC模式，由外设搬移到内存
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DMA_InitStructure.DMA_BufferSize = N*M; //DMA缓存大小，单位为DMA_MemoryDataSize
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DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //接收一次数据后，设备地址禁止后移
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DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //接收一次数据后，目标内存地址后移
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DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//定义外设数据宽度为16位
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DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //DMA搬数据尺寸，HalfWord就是为16位
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DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //转换模式，循环缓存模式。
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DMA_InitStructure.DMA_Priority = DMA_Priority_High; //DMA优先级高
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DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //M2M模式禁用
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DMA_Init(DMA1_Channel1, &DMA_InitStructure);
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/* Enable DMA1 channel1 */
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DMA_Cmd(DMA1_Channel1, ENABLE);
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/* ADC1 configuration ------------------------------------------------------*/
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ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //独立的转换模式
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ADC_InitStructure.ADC_ScanConvMode = ENABLE; //开启扫描模式
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ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //开启连续转换模式
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ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //ADC外部开关，关闭状态
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ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //对齐方式,ADC为12位中，右对齐方式
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ADC_InitStructure.ADC_NbrOfChannel = M; //开启通道数，4个
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ADC_Init(ADC1, &ADC_InitStructure);
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/* ADC1 regular channel10 configuration ADC通道组， 第10个通道 采样顺序1，转换时间 */
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ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_239Cycles5);
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ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 2, ADC_SampleTime_239Cycles5);
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ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 3, ADC_SampleTime_239Cycles5);
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ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 4, ADC_SampleTime_239Cycles5);
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// ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 5, ADC_SampleTime_239Cycles5);
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// ADC_RegularChannelConfig(ADC1, ADC_Channel_15, 6, ADC_SampleTime_239Cycles5);
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/* ADC命令，使能 */
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ADC_DMACmd(ADC1, ENABLE);
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/* 开启ADC1 */
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ADC_Cmd(ADC1, ENABLE);
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/* 重新校准 */
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ADC_ResetCalibration(ADC1);
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/* 等待重新校准完成 */
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while(ADC_GetResetCalibrationStatus(ADC1));
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/* 开始校准 */
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ADC_StartCalibration(ADC1);
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/* 等待校准完成 */
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while(ADC_GetCalibrationStatus(ADC1));
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/* 连续转换开始，ADC通过DMA方式不断的更新RAM */
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ADC_SoftwareStartConvCmd(ADC1, ENABLE);
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}
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void ADC_init(void)
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{
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RCC_Configuration();
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DAC_out_init();
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}
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void filter(void)
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{
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int sum=0;
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u8 count,i;
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for(i=0;i<M;i++) //
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{
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for(count=0;count<N;count++)
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{
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sum+=ADCConvertedValue[count][i];
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}
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PLC_16BIT[0X1000+6030+i]=sum/N;
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sum=0;
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}
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}
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