在测试过GPIO之后，对于该开发板的使用算是熟悉了，于是测试ADC，这一次测试的芯片内部温度的读取。程序使用的是demo_ADC1_TEMP，将以下程序编译烧录至开发板中：
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* Copyright (c) 2022, Nations Technologies Inc.
*
* All rights reserved.
* ****************************************************************************
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
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* this list of conditions and the disclaimer below.
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* Nations' name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY NATIONS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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/**
*
* @copyright Copyright (c) 2022, Nations Technologies Inc. All rights reserved.
*/
#include <stdio.h>
#include "main.h"
/** @addtogroup ADC_ADC1_TEMP
* @{
*/
ADC_InitType ADC_InitStructure;
ADC_InitTypeEx ADC_InitStructureEx;
DMA_InitType DMA_InitStructure;
__IO uint16_t ADCConvertedValue;
void RCC_Configuration(void);
void Delay(__IO uint32_t nCount);
void USART1_Config(void);
#define Vc0 0 //X
#define Tc1 1.5f
/*V30 is the voltage value at 30 degree Celsius by factory default*/
uint16_t V30 = 0;
uint16_t ADvalue = 0;
uint32_t temp = 0;
#ifdef DEFINEFLOAT //Float
__IO float TempValue;
/*xx mv per degree Celsius by datasheet define*/
#define AVG_SLOPE 0.0041f
/**
*
@brief Cal temp use float result.
*/
float TempCal(uint16_t TempAdVal)
{
float Temperate;
/* Get the temperature inside the chip */
Temperate=((V30+Vc0-TempAdVal)*3.3/4095)/AVG_SLOPE+30.0f-Tc1;
return Temperate;
}
#else
__IO int16_t TempValue;
/*xx mv per degree Celsius by datasheet define*/
#define AVG_SLOPE 41
/**
* @brief Cal temp use integer result.
*/
int16_t TempCal(uint16_t TempAdVal)
{
int16_t Temperate;
/* Get the temperature inside the chip */
Temperate=(int16_t)((((V30+Vc0-TempAdVal)*33*10000)/(4095*10))/AVG_SLOPE+30-Tc1);
return Temperate;
}
#endif
/**
* @brief Main program
*/
int main(void)
{
/* System clocks configuration ---------------------------------------------*/
RCC_Configuration();
/* DMA1 channel1 configuration ----------------------------------------------*/
DMA_DeInit(DMA1_CH1);
DMA_InitStructure.PeriphAddr = (uint32_t)&ADC1->DAT;
DMA_InitStructure.MemAddr = (uint32_t)&ADCConvertedValue;
DMA_InitStructure.Direction = DMA_DIR_PERIPH_SRC;
DMA_InitStructure.BufSize = 1;
DMA_InitStructure.PeriphInc = DMA_PERIPH_INC_DISABLE;
DMA_InitStructure.DMA_MemoryInc = DMA_MEM_INC_DISABLE;
DMA_InitStructure.PeriphDataSize = DMA_PERIPH_DATA_SIZE_HALFWORD;
DMA_InitStructure.MemDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.CircularMode = DMA_MODE_CIRCULAR;
DMA_InitStructure.Priority = DMA_PRIORITY_HIGH;
DMA_InitStructure.Mem2Mem = DMA_M2M_DISABLE;
DMA_Init(DMA1_CH1, &DMA_InitStructure);
/* Enable DMA1 channel1 */
DMA_EnableChannel(DMA1_CH1, ENABLE);
/* ADC1 configuration ------------------------------------------------------*/
ADC_InitStructure.WorkMode = ADC_WORKMODE_INDEPENDENT;
ADC_InitStructure.MultiChEn = DISABLE;
ADC_InitStructure.ContinueConvEn = ENABLE;
ADC_InitStructure.ExtTrigSelect = ADC_EXT_TRIGCONV_NONE;
ADC_InitStructure.DatAlign = ADC_DAT_ALIGN_R;
ADC_InitStructure.ChsNumber = 1;
ADC_Init(ADC1, &ADC_InitStructure);
/* ADC1 temp sensor enable */
ADC_EnableTempSensorVrefint(ENABLE);
ADC_InitStructureEx.VbatMinitEn = ENABLE;
ADC_InitStructureEx.DeepPowerModEn = DISABLE;
ADC_InitStructureEx.JendcIntEn = DISABLE;
ADC_InitStructureEx.EndcIntEn = DISABLE;
ADC_InitStructureEx.ClkMode = ADC_CTRL3_CKMOD_AHB;
ADC_InitStructureEx.CalAtuoLoadEn = DISABLE;
ADC_InitStructureEx.DifModCal = false;
ADC_InitStructureEx.ResBit = ADC_CTRL3_RES_12BIT;
ADC_InitStructureEx.SampSecondStyle = false;
ADC_InitEx(ADC1, &ADC_InitStructureEx);
/* ADC1 regular configuration */
ADC_ConfigRegularChannel(ADC1, ADC_CH_16, 1, ADC_SAMP_TIME_239CYCLES5);//ADC_CH_16£º²âζȣ¬ADC_CH_18£º²âÄÚ²¿1.2V»ù×¼
/* ADC1 temp sensor enable */
ADC_EnableTempSensorVrefint(ENABLE);
/* Enable ADC1 DMA */
ADC_EnableDMA(ADC1, ENABLE);
/* Enable ADC1 */
ADC_Enable(ADC1, ENABLE);
/*Check ADC Ready*/
while(ADC_GetFlagStatusNew(ADC1,ADC_FLAG_RDY) == RESET)
;
/* Start ADC1 calibration */
ADC_StartCalibration(ADC1);
/* Check the end of ADC1 calibration */
while (ADC_GetCalibrationStatus(ADC1))
;
/* Start ADC1 Software Conversion */
ADC_EnableSoftwareStartConv(ADC1, ENABLE);
/* Config Uart1 as Temperature output */
USART1_Config();
V30 = *(__IO uint32_t*)((uint32_t)0x1FFFF7D0);
while (1)
{
/* */
TempValue = TempCal(ADCConvertedValue);
#ifdef DEFINEFLOAT
printf("\r\n Temperature = %.3f C\r\n",TempValue);
#else
printf("\r\n Temperature = %d C\r\n",TempValue);
#endif
Delay(500);
}
}
/*
* @brief uart configure as 115200 8-N-1
*/
void USART1_Config(void)
{
GPIO_InitType GPIO_InitStructure;
USART_InitType USART_InitStructure;
/* configure USART1 clock*/
RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_USART1 | RCC_APB2_PERIPH_GPIOA, ENABLE);
/* USART1 GPIO config */
/* Configure USART1 Tx (PA.09) as alternate function push-pull */
GPIO_InitStructure.Pin = GPIO_PIN_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure);
/* Configure USART1 Rx (PA.10) as input floating */
GPIO_InitStructure.Pin = GPIO_PIN_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure);
/* USART1 work mode*/
USART_InitStructure.BaudRate = 115200;
USART_InitStructure.WordLength = USART_WL_8B;
USART_InitStructure.StopBits = USART_STPB_1;
USART_InitStructure.Parity = USART_PE_NO ;
USART_InitStructure.HardwareFlowControl = USART_HFCTRL_NONE;
USART_InitStructure.Mode = USART_MODE_RX | USART_MODE_TX;
USART_Init(USART1, &USART_InitStructure);
USART_Enable(USART1, ENABLE);
}
/* retarget the C library printf function to the USART */
int fputc(int ch, FILE* f)
{
USART_SendData(USART1, (uint8_t)ch);
while (USART_GetFlagStatus(USART1, USART_FLAG_TXDE) == RESET)
;
return (ch);
}
/**
* @brief Delay funciton.
*/
void Delay(__IO uint32_t nCount)
{
for(; nCount != 0; nCount--);
}
/**
* @brief Configures the different system clocks.
*/
void RCC_Configuration(void)
{
/* Enable peripheral clocks ------------------------------------------------*/
/* Enable DMA1 clocks */
RCC_EnableAHBPeriphClk(RCC_AHB_PERIPH_DMA1, ENABLE);
/* Enable ADC1 clocks */
RCC_EnableAHBPeriphClk(RCC_AHB_PERIPH_ADC1,ENABLE);
/* RCC_ADCHCLK_DIV16*/
ADC_ConfigClk(ADC_CTRL3_CKMOD_AHB,RCC_ADCHCLK_DIV16);
RCC_ConfigAdc1mClk(RCC_ADC1MCLK_SRC_HSE, RCC_ADC1MCLK_DIV8); //selsect HSE as RCC ADC1M CLK Source
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file pointer to the source file name
* @param line assert_param error line source number
*/
void assert_failed(const uint8_t* expr, const uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**
* @}
*/
/**
* @}
*/
打开Debug模式：
开发板右下角白色LED亮起：
将变量ADCConvertedValue添加至Watch窗口：
首先读取室温下的ADC值，为1704：
将手指放置MCU上约分钟，提高温度，读取到的值为1673：
由于ADCConvertedValue的值越低，温度越高，所以该验证无问题，详细温度读取将在下一次的串口验证中实现。
提升卡
变色卡
千斤顶
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