使用某1個寶上入手的CH32V103c8t6核心板，用面包板搭建硬件環境。實現了PA0、PA1、PA2和PA7四路模擬量的ADC采樣，結果顯示在i2c接口的0.91吋oled上，例程見附件。
制作出來的實物圖如下：
單片機源程序如下:
- /*********************** ADC_00 *************************************************
- * @工程名稱：ADC_00
- * @說明：ADC規則通道采樣，使用DMA功能，四路模擬量輸入采集。
- *
- *
- *******************************************************************************/
- #include "debug.h"
- #include "codeTab.h"
- #include "oled_i2c.h"
- /* Global typedef */
- /* Global define */
- /* Global Variable */
- u16 TxBuf[1024];
- s16 Calibrattion_Val = 0;
- /*********************************************************************
- * @fn ADC_Function_Init
- *
- * @brief Initializes ADC collection.
- *
- * @return none
- */
- /*******************************************************************************
- * Function Name : ADC_Function_Init
- * Description : Initializes ADC collection.
- * Input : None
- * Return : None
- *******************************************************************************/
- void ADC_Function_Init(void)
- {
- ADC_InitTypeDef ADC_InitStructure;
- GPIO_InitTypeDef GPIO_InitStructure;
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE );
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE );
- RCC_ADCCLKConfig(RCC_PCLK2_Div8);
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_7;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- ADC_DeInit(ADC1);
- ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
- ADC_InitStructure.ADC_ScanConvMode = DISABLE;
- ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
- ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
- ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
- ADC_InitStructure.ADC_NbrOfChannel = 1;
- ADC_Init(ADC1, &ADC_InitStructure);
- ADC_DMACmd(ADC1, ENABLE);
- ADC_Cmd(ADC1, ENABLE);
- ADC_ResetCalibration(ADC1);
- while(ADC_GetResetCalibrationStatus(ADC1));
- ADC_StartCalibration(ADC1);
- while(ADC_GetCalibrationStatus(ADC1));
- }
- u16 Get_ADC_Val(u8 ch)
- {
- u16 val;
- ADC_SoftwareStartConvCmd(ADC1, ENABLE);
- while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC ));
- val = ADC_GetConversionValue(ADC1);
- return val;
- }
- u16 Get_ADC_Average(u16 *buf,u8 times)
- {
- u32 temp_val = 0;
- u8 t;
- u16 val;
- for(t=0;t<times;t++)
- {
- temp_val += buf[t];
- }
- val = temp_val/times;
- return val;
- }
- /*********************************************************************
- * @fn DMA_Tx_Init
- *
- * @brief Initializes the DMAy Channelx configuration.
- *
- * @param DMA_CHx - x can be 1 to 7.
- * ppadr - Peripheral base address.
- * memadr - Memory base address.
- * bufsize - DMA channel buffer size.
- *
- * @return none
- */
- void DMA_Tx_Init( DMA_Channel_TypeDef* DMA_CHx, u32 ppadr, u32 memadr, u16 bufsize)
- {
- DMA_InitTypeDef DMA_InitStructure;
- RCC_AHBPeriphClockCmd( RCC_AHBPeriph_DMA1, ENABLE );
- DMA_DeInit(DMA_CHx);
- DMA_InitStructure.DMA_PeripheralBaseAddr = ppadr;
- DMA_InitStructure.DMA_MemoryBaseAddr = memadr;
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
- DMA_InitStructure.DMA_BufferSize = bufsize;
- 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_VeryHigh;
- DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
- DMA_Init( DMA_CHx, &DMA_InitStructure );
- DMA_Cmd( DMA_CHx, ENABLE );
- }
- /*********************************************************************
- * @fn Get_ConversionVal_3_3V
- *
- * @brief Get Conversion Value Under 3.3V.
- *
- * @param val - Sampling value
- *
- * @return val+Calibrattion_Val - Conversion Value.
- */
- u16 Get_ConversionVal_3_3V(s16 val)
- {
- int32_t y;
- y = 6 * (val + Calibrattion_Val) / 1000 - 12;
- if(val == 0 || val == 4095)
- return val;
- else
- {
- if((val + Calibrattion_Val - y) < 0)
- return 0;
- if((Calibrattion_Val + val - y) > 4095)
- return 4095;
- return (val + Calibrattion_Val);
- }
- }
- /*********************************************************************
- * @fn Get_ConversionVal_5V
- *
- * @brief Get Conversion Value Under 5V.
- *
- * @param val - Sampling value
- *
- * @return val+Calibrattion_Val - Conversion Value.
- */
- u16 Get_ConversionVal_5V(s16 val)
- {
- int32_t y;
- y = 4 * (val + Calibrattion_Val) / 1000 - 8;
- if(val == 0 || val == 4095)
- return val;
- else
- {
- if((val + Calibrattion_Val - y) < 0)
- return 0;
- if((Calibrattion_Val + val - y) > 4095)
- return 4095;
- return (val + Calibrattion_Val);
- }
- }
- /*********************************************************************
- * @fn main
- *
- * @brief Main program.
- *
- * @return none
- */
- u16 i;
- u16 ADC_Average;
- u16 s1,s2,s3;
- int main(void)
- {
- Delay_Init();
- I2C_Configuration();
- OLED_Init();
- USART_Printf_Init(115200);
- OLED_Fill(0xff);
- Delay_Ms(500);
- OLED_Fill(0x00);
- OLED_ShowStr(8, 0, "ADC: ", 2);
- OLED_ShowStr(8, 2, "ADC: ", 2);
- //ADC校準
- //ADC初始化
- ADC_Function_Init();
- //DMA初始化
- DMA_Tx_Init( DMA1_Channel1, (u32)&ADC1->RDATAR, (u32)TxBuf, 10 );
- while(1)
- {
- //PA0輸入
- ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_239Cycles5); //配置ADC規則組通道和采樣時間
- ADC_SoftwareStartConvCmd(ADC1, ENABLE);
- Delay_Ms(50); //啟動ADC采樣
- ADC_Average = Get_ADC_Average(TxBuf,10); //啟動ADC采樣，數據均值濾波
- s1=ADC_Average/1000;
- OLED_ShowSZ(s1, 48, 0, 2);
- s1=ADC_Average-s1*1000;
- s2=s1/100;
- OLED_ShowSZ(s2, 56, 0, 2);
- s2=s1-s2*100;
- s3=s2/10;
- OLED_ShowSZ(s3, 64, 0, 2);
- s3=s2-s3*10;
- OLED_ShowSZ(s3, 72, 0, 2);
- //PA1輸入
- ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5);
- ADC_SoftwareStartConvCmd(ADC1, ENABLE);
- Delay_Ms(50); //啟動ADC采樣
- ADC_Average = Get_ADC_Average(TxBuf,10); //啟動ADC采樣，數據均值濾波
- s1=ADC_Average/1000;
- OLED_ShowSZ(s1, 96, 0, 2);
- s1=ADC_Average-s1*1000;
- s2=s1/100;
- OLED_ShowSZ(s2, 104, 0, 2);
- s2=s1-s2*100;
- s3=s2/10;
- OLED_ShowSZ(s3, 112, 0, 2);
- s3=s2-s3*10;
- OLED_ShowSZ(s3, 120, 0, 2);
- //PA2輸入
- ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 1, ADC_SampleTime_239Cycles5); //配置ADC規則組通道和采樣時間
- ADC_SoftwareStartConvCmd(ADC1, ENABLE);
- Delay_Ms(50); //啟動ADC采樣
- ADC_Average = Get_ADC_Average(TxBuf,10); //啟動ADC采樣，數據均值濾波
- s1=ADC_Average/1000;
- OLED_ShowSZ(s1, 48, 2, 2);
- s1=ADC_Average-s1*1000;
- s2=s1/100;
- OLED_ShowSZ(s2, 56, 2, 2);
- s2=s1-s2*100;
- s3=s2/10;
- OLED_ShowSZ(s3, 64, 2, 2);
- s3=s2-s3*10;
- OLED_ShowSZ(s3, 72, 2, 2);
- //PA7輸入
- ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 1, ADC_SampleTime_239Cycles5); //配置ADC規則組通道和采樣時間
- ADC_SoftwareStartConvCmd(ADC1, ENABLE);
- Delay_Ms(50); //啟動ADC采樣
- ADC_Average = Get_ADC_Average(TxBuf,10); //啟動ADC采樣，數據均值濾波
- s1=ADC_Average/1000;
- OLED_ShowSZ(s1, 96, 2, 2);
- s1=ADC_Average-s1*1000;
- s2=s1/100;
- OLED_ShowSZ(s2, 104, 2, 2);
- s2=s1-s2*100;
- s3=s2/10;
- OLED_ShowSZ(s3, 112, 2, 2);
- s3=s2-s3*10;
- OLED_ShowSZ(s3, 120, 2, 2);
- }
- }
MounRiver工程文件51hei附件下載:
ADC_DMA多路采集.7z
(329.32 KB, 下載次數: 10)
2022-4-6 15:26 上傳
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