RISC-V單片機CH32V103的ADC多路采樣例程 MounRiver工程文件

ID:678336 · 發表于 2022-4-6 06:34

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);
}
}

復制代碼

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)

ID:1017639 · 發表于 2022-4-12 18:19

很不錯，實用性很高

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RISC-V單片機CH32V103的ADC多路采樣例程 MounRiver工程文件

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