1. 前言
- ADC 模块包含 2 个 12 位的逐次逼近型的模拟数字转换器，最高 14MHz 的输入时钟。支持 16 个
- 外部通道和 2 个内部信号源采样源。可完成通道的单次转换、连续转换，通道间自动扫描模式、间
- 断模式、外部触发模式、双重采样等功能。可以通过模拟看门狗功能监测通道电压是否在阈值范围
- 内，本次实验采用一路ADC间隔均值采样，然后打印输出采样值和温度值，熟悉STM32开发用易上手配置。✨✨✨
这是使用MounRiver Studio开发的项目，支持在RISC-V核心基础硬件CH32V307评估板上使用带有msh Shell的RTOS快速原型。
MCU：CH32V307VCT6，主频 144MHz，FLASH和RAM可配置
l 12 位分辨率
l 支持 16 个外部通道和 2 个内部信号源采样
l 多通道的多种采样转换方式：单次、连续、扫描、触发、间断等
l 数据对齐模式：左对齐、右对齐
l 采样时间可按通道分别编程
l 规则转换和注入转换均支持外部触发
l 模拟看门狗监测通道电压，自校准功能
l 双重模式
l ADC 通道输入范围：0≤VIN≤VDDA
l 输入增益可调，可实现小信号放大采样
首先，应安装 CH32V307 评估板的驱动程序，打开设备管理器查看USB 端口和外部接口已准备就绪。
2. 软件配置
2.1 安装MounRiver Studio
环境搭建教程：https://blog.csdn.net/VOR234/article/details/128932474
3. ADC项目测试
3.1 打开ADC工程
评估板说明及参考例程：https://www.wch.cn/downloads/CH32V307EVT_ZIP.html
进入EXAM目录，就有对应的外设教程
进入DInternal_Temperature文件下，双击Internal_Temperature.wvproj,
打开项目工程如下，main.c在user文件夹下
main.c，参考电压是3.3V
/********************************** (C) COPYRIGHT ******************************* * File Name : main.c * Author : WCH * Version : V1.0.0 * Date : 2021/06/06 * Description : Main program body. ********************************************************************************* * Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd. * Attention: This software (modified or not) and binary are used for * microcontroller manufactured by Nanjing Qinheng Microelectronics. *******************************************************************************/ /* *@Note Internal temperature sensor routine: Through the ADC channel 16（PA2）, the output voltage value and temperature value of the internal temperature sensor are collected. */ #include "debug.h" /* Global Variable */ s16 Calibrattion_Val = 0; /********************************************************************* * @fn ADC_Function_Init * * @brief Initializes ADC collection. * * @return none */ void ADC_Function_Init(void) { ADC_InitTypeDef ADC_InitStructure={0}; GPIO_InitTypeDef GPIO_InitStructure={0}; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE ); RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE ); RCC_ADCCLKConfig(RCC_PCLK2_Div8); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; 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 = DISABLE; 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_Cmd(ADC1, ENABLE); ADC_BufferCmd(ADC1, DISABLE); //disable buffer ADC_ResetCalibration(ADC1); while(ADC_GetResetCalibrationStatus(ADC1)); ADC_StartCalibration(ADC1); while(ADC_GetCalibrationStatus(ADC1)); Calibrattion_Val = Get_CalibrationValue(ADC1); ADC_BufferCmd(ADC1, ENABLE); //enable buffer ADC_TempSensorVrefintCmd(ENABLE); } /********************************************************************* * @fn Get_ADC_Val * * @brief Returns ADCx conversion result data. * * @param ch - ADC channel. * ADC_Channel_0 - ADC Channel0 selected. * ADC_Channel_1 - ADC Channel1 selected. * ADC_Channel_2 - ADC Channel2 selected. * ADC_Channel_3 - ADC Channel3 selected. * ADC_Channel_4 - ADC Channel4 selected. * ADC_Channel_5 - ADC Channel5 selected. * ADC_Channel_6 - ADC Channel6 selected. * ADC_Channel_7 - ADC Channel7 selected. * ADC_Channel_8 - ADC Channel8 selected. * ADC_Channel_9 - ADC Channel9 selected. * ADC_Channel_10 - ADC Channel10 selected. * ADC_Channel_11 - ADC Channel11 selected. * ADC_Channel_12 - ADC Channel12 selected. * ADC_Channel_13 - ADC Channel13 selected. * ADC_Channel_14 - ADC Channel14 selected. * ADC_Channel_15 - ADC Channel15 selected. * ADC_Channel_16 - ADC Channel16 selected. * ADC_Channel_17 - ADC Channel17 selected. * * @return none */ u16 Get_ADC_Val(u8 ch) { u16 val; ADC_RegularChannelConfig(ADC1, ch, 1, ADC_SampleTime_239Cycles5 ); ADC_SoftwareStartConvCmd(ADC1, ENABLE); while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC )); val = ADC_GetConversionValue(ADC1); return val; } /********************************************************************* * @fn Get_ADC_Average * * @brief Returns ADCx conversion result average data. * * @param ch - ADC channel. * ADC_Channel_0 - ADC Channel0 selected. * ADC_Channel_1 - ADC Channel1 selected. * ADC_Channel_2 - ADC Channel2 selected. * ADC_Channel_3 - ADC Channel3 selected. * ADC_Channel_4 - ADC Channel4 selected. * ADC_Channel_5 - ADC Channel5 selected. * ADC_Channel_6 - ADC Channel6 selected. * ADC_Channel_7 - ADC Channel7 selected. * ADC_Channel_8 - ADC Channel8 selected. * ADC_Channel_9 - ADC Channel9 selected. * ADC_Channel_10 - ADC Channel10 selected. * ADC_Channel_11 - ADC Channel11 selected. * ADC_Channel_12 - ADC Channel12 selected. * ADC_Channel_13 - ADC Channel13 selected. * ADC_Channel_14 - ADC Channel14 selected. * ADC_Channel_15 - ADC Channel15 selected. * ADC_Channel_16 - ADC Channel16 selected. * ADC_Channel_17 - ADC Channel17 selected. * * @return val - The Data conversion value. */ u16 Get_ADC_Average(u8 ch,u8 times) { u32 temp_val=0; u8 t; u16 val; for(t=0;t<times;t++) { temp_val+=Get_ADC_Val(ch); Delay_Ms(5); } val = temp_val/times; return val; } /********************************************************************* * @fn Get_ConversionVal * * @brief Get Conversion Value. * * @param val - Sampling value * * @return val+Calibrattion_Val - Conversion Value. */ u16 Get_ConversionVal(s16 val) { if((val+Calibrattion_Val)<0) return 0; if((Calibrattion_Val+val)>4095||val==4095) return 4095; return (val+Calibrattion_Val); } /********************************************************************* * @fn main * * @brief Main program. * * @return none */ int main(void) { u16 ADC_val; s32 val_mv; SystemCoreClockUpdate(); Delay_Init(); USART_Printf_Init(115200); printf("SystemClk:%d\r\n",SystemCoreClock); printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() ); ADC_Function_Init(); printf("CalibrattionValue:%d\n", Calibrattion_Val); while(1) { ADC_val = Get_ADC_Average( ADC_Channel_TempSensor, 10 ); Delay_Ms(500); ADC_val = Get_ConversionVal(ADC_val); printf( "ADC-Val:%04d\r\n", ADC_val); val_mv = (ADC_val*3300/4096); printf("mv-T-%d,%0d\n",val_mv ,TempSensor_Volt_To_Temper(val_mv)); Delay_Ms(2); } }
3.2 编译项目
开发板数据线连接电脑就可以开始连接调试🛹🛹🛹，首先开始编译，编译成功如下
然后下载，下载成功如下
4. 下载验证
4.1 接线
根据程序设计调试，可以用手指触摸芯片，即可输出相关温度变化
4.2 演示效果
代码下载后验证，点击串口调试器，设置串口参数确认。
复位运行成功如下打印温度变化，从12度到15度
SystemClk:96000000 ChipID:30700518 CalibrattionValue:9 ADC-Val:1786 mv-T-1438,12 ADC-Val:1781 mv-T-1434,13 ADC-Val:1777 mv-T-1431,13 ADC-Val:1775 mv-T-1430,13 ADC-Val:1773 mv-T-1428,14 ADC-Val:1772 mv-T-1427,14 ADC-Val:1771 mv-T-1426,14 ADC-Val:1770 mv-T-1426,14 ADC-Val:1768 mv-T-1424,15 ADC-Val:1768 mv-T-1424,15 ADC-Val:1769 mv-T-1425,15 ADC-Val:1768 mv-T-1424,15 ADC-Val:1767 mv-T-1423,15 ADC-Val:1767 mv-T-1423,15 ADC-Val:1767
5. 小结
🥳🥳🥳通过对这篇文章我们掌握了沁恒WCH CH32V307V-R1开发板读取板载温度实验，这样就可以设置适当工作环境防寒暑，确保设备正常接下来会有许多有趣的实验，尝试与Arduino通讯做更加好玩的实验，进而丰富我们的生活。🛹🛹🛹从而实现对外部世界进行感知，充分认识这个有机与无机的环境，🥳🥳🥳科学地合理地进行创作和发挥效益，然后为人类社会发展贡献一点微薄之力。🤣🤣🤣
