STM32G030，为NTC设定一个IO口，代码怎么写？

下面是一个简单的示例代码，为STM32G030设置一个IO口控制NTC连接的温度传感器：

首先，需要在CubeMX中配置GPIO引脚，选择输入模式并激活上拉电阻。然后在代码中初始化GPIO口：

/* 定义NTC连接的GPIO引脚 */
#define NTC_GPIO_PORT          GPIOA
#define NTC_GPIO_PIN           GPIO_PIN_0

/* 初始化GPIO口 */
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOA_CLK_ENABLE();

GPIO_InitStruct.Pin = NTC_GPIO_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(NTC_GPIO_PORT, &GPIO_InitStruct);

接下来就可以从GPIO口读取温度传感器的值了：

/* 读取NTC温度传感器的值 */
uint16_t ntc_value = HAL_GPIO_ReadPin(NTC_GPIO_PORT, NTC_GPIO_PIN);

这里需要注意，由于NTC是一个模拟传感器，它的输出值是一个电压值，需要使用ADC模块将其转换为数字信号进行处理。如果你需要更精确的温度测量结果，可以使用ADC模块。

相关问题

STM32G030 如何让NTC值打印在LCM屏上, 代码怎么写？

要让NTC值打印在LCM屏上，你需要先读取NTC值并将其转换为温度值，然后将温度值转换为字符串并通过串口输出或者显示在LCM屏幕上。

以下是一个简单的代码示例，假设你的NTC连接在ADC1通道5上，LCM屏幕连接在SPI1上：

#include "stm32g0xx.h"
#include "stdlib.h"
#include "stdio.h"

#define SPI1_CS_Pin GPIO_PIN_4
#define SPI1_CS_GPIO_Port GPIOA

#define ADC_CHANNEL_NTC ADC_CHANNEL_5

void LCM_SPI_Send(uint8_t data);
void LCM_Write_Command(uint8_t cmd);
void LCM_Write_Data(uint8_t data);
void LCM_Init(void);
void LCM_Clear(void);
void LCM_Set_Cursor(uint8_t col, uint8_t row);
void LCM_Print(char* str);

void ADC_Init(void);
uint16_t ADC_Read_Channel(uint32_t channel);

int main(void)
{
    char temp_str[10];
    float temp_value;

    RCC->APBENR2 |= RCC_APBENR2_SYSCFGEN; // enable system configuration controller clock
    SYSCFG->CFGR1 &= ~SYSCFG_CFGR1_BOOSTEN; // disable I/O analog switch voltage booster

    RCC->IOPENR |= RCC_IOPENR_GPIOAEN; // enable GPIOA clock
    GPIOA->MODER &= ~(GPIO_MODER_MODE4_Msk); // set PA4 as output
    GPIOA->MODER |= (GPIO_MODER_MODE4_0); // set PA4 as output

    LCM_Init();
    ADC_Init();

    while(1)
    {
        uint16_t adc_value = ADC_Read_Channel(ADC_CHANNEL_NTC);
        temp_value = (float)adc_value / 4096.0f * 3.3f; // calculate voltage
        temp_value = (temp_value - 0.76f) / 0.0025f; // calculate temperature
        sprintf(temp_str, "%.1f C", temp_value); // convert temperature to string with one decimal place
        LCM_Clear();
        LCM_Set_Cursor(0, 0);
        LCM_Print(temp_str);
    }
}

void LCM_SPI_Send(uint8_t data)
{
    while(!(SPI1->SR & SPI_SR_TXE_Msk)); // wait until transmit buffer is empty
    SPI1->DR = data; // send data
    while(!(SPI1->SR & SPI_SR_RXNE_Msk)); // wait until receive buffer is not empty
    SPI1->DR; // read received data and clear RXNE flag
}

void LCM_Write_Command(uint8_t cmd)
{
    GPIOA->BSRR |= SPI1_CS_Pin << 16; // assert CS
    LCM_SPI_Send(0xF8); // send command prefix
    LCM_SPI_Send(cmd); // send command
    GPIOA->BSRR |= SPI1_CS_Pin; // deassert CS
}

void LCM_Write_Data(uint8_t data)
{
    GPIOA->BSRR |= SPI1_CS_Pin << 16; // assert CS
    LCM_SPI_Send(0xFA); // send data prefix
    LCM_SPI_Send(data); // send data
    GPIOA->BSRR |= SPI1_CS_Pin; // deassert CS
}

void LCM_Init(void)
{
    RCC->APBENR2 |= RCC_APBENR2_SPI1EN; // enable SPI1 clock
    RCC->IOPENR |= RCC_IOPENR_GPIOAEN; // enable GPIOA clock
    GPIOA->MODER &= ~(GPIO_MODER_MODE5_Msk | GPIO_MODER_MODE6_Msk | GPIO_MODER_MODE7_Msk);
    GPIOA->MODER |= (GPIO_MODER_MODE5_1 | GPIO_MODER_MODE6_1 | GPIO_MODER_MODE7_1); // set PA5/PA6/PA7 to alternate function mode
    GPIOA->AFR[0] |= (0x5 << GPIO_AFRL_AFSEL5_Pos) | (0x5 << GPIO_AFRL_AFSEL6_Pos) | (0x5 << GPIO_AFRL_AFSEL7_Pos); // set alternate function to SPI1
    GPIOA->MODER &= ~(GPIO_MODER_MODE4_Msk);
    GPIOA->MODER |= (GPIO_MODER_MODE4_0); // set PA4 to output mode
    GPIOA->BSRR |= SPI1_CS_Pin; // deassert CS
    SPI1->CR1 |= SPI_CR1_MSTR; // set SPI1 as master
    SPI1->CR1 |= SPI_CR1_SSM; // enable software slave management
    SPI1->CR1 |= SPI_CR1_SSI; // set internal slave select
    SPI1->CR1 |= SPI_CR1_SPE; // enable SPI1
    LCM_Write_Command(0x30); // wake up
    LCM_Write_Command(0x0C); // turn off cursor
    LCM_Write_Command(0x01); // clear screen
    LCM_Write_Command(0x06); // set entry mode
}

void LCM_Clear(void)
{
    LCM_Write_Command(0x01);
}

void LCM_Set_Cursor(uint8_t col, uint8_t row)
{
    uint8_t address = col + row * 0x40;
    LCM_Write_Command(0x80 | address);
}

void LCM_Print(char* str)
{
    while(*str)
    {
        LCM_Write_Data(*str++);
    }
}

void ADC_Init(void)
{
    RCC->APBENR2 |= RCC_APBENR2_ADCEN; // enable ADC clock
    ADC1->CFGR1 |= ADC_CFGR1_RES_1; // set 10-bit resolution
    ADC1->SMPR |= ADC_SMPR_SMP_1 | ADC_SMPR_SMP_0; // set sampling time to 13.5 cycles
    ADC1->CR |= ADC_CR_ADEN; // enable ADC
    while(!(ADC1->ISR & ADC_ISR_ADRDY_Msk)); // wait for ADC to be ready
    ADC1->CR |= ADC_CR_ADSTART; // start ADC conversion
}

uint16_t ADC_Read_Channel(uint32_t channel)
{
    ADC1->CHSELR = channel; // select channel
    while(!(ADC1->ISR & ADC_ISR_EOC_Msk)); // wait for conversion to complete
    return ADC1->DR; // read conversion result
}

以上代码中，我们使用了SPI1控制LCM屏幕，使用ADC1读取NTC电阻的电压并计算温度值，使用sprintf函数将温度值转换为字符串，最后显示在LCM屏幕上。你需要根据实际的硬件连接和需求进行修改。

STM32G030写一个NTC读取电压值转换成电阻值，然后查表得到温度值，管脚为PA8,代码实现

以下是基于STM32CubeIDE的代码实现，假设NTC电阻值为10K：

#include "main.h"
#include <math.h>

#define VREF 3.3f // ADC参考电压
#define R1 10000.0f // NTC电阻值
#define B_VAL 3950.0f // B值
#define T0 298.15f // 温度基准值，25℃对应的K值

ADC_HandleTypeDef hadc1;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_ADC1_Init(void);

int main(void)
{
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_ADC1_Init();

  HAL_ADC_Start(&hadc1);
  uint32_t adcValue = 0;
  float voltage = 0;
  float resistance = 0;
  float temperature = 0;

  while (1)
  {
    if (HAL_ADC_PollForConversion(&hadc1, 1000) == HAL_OK)
    {
      adcValue = HAL_ADC_GetValue(&hadc1);
      voltage = (float)adcValue / 4096 * VREF; // 将ADC值转换为电压值
      resistance = R1 * (VREF / voltage - 1); // 根据电压值计算NTC电阻值
      temperature = 1.0 / (1.0 / T0 + log(resistance / R1) / B_VAL) - 273.15; // 根据NTC电阻值查表得到温度值
    }
  }
}

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage 
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
                                | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_ADC1_Init(void)
{
  ADC_ChannelConfTypeDef sConfig = {0};

  /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) 
  */
  hadc1.Instance = ADC1;
  hadc1.Init.ScanConvMode = DISABLE;
  hadc1.Init.ContinuousConvMode = DISABLE;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.NbrOfConversion = 1;
  if (HAL_ADC_Init(&hadc1) != HAL_OK)
  {
    Error_Handler();
  }
  /** Configure Regular Channel 
  */
  sConfig.Channel = ADC_CHANNEL_1;
  sConfig.Rank = ADC_REGULAR_RANK_1;
  sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  __HAL_RCC_GPIOA_CLK_ENABLE();

  /**Configure GPIO pin : PA8 */
  GPIO_InitStruct.Pin = GPIO_PIN_8;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}

注意，上述代码中涉及到的NTC电阻值、B值和温度基准值需要根据实际情况进行修改。如果没有查表得到温度的函数，可以自行编写或者使用已有的库函数。