发出命令后无法从 PuTTY 上的 NTC 热敏电阻读取连续值

问：

while (1)
{

// User giving input
uint8_t input;
HAL_UART_Receive(&huart2, &input, sizeof(input), HAL_MAX_DELAY);  //receiving the command

//if (input=='1')
if (input=='1'&& system==0)
{
system=1;   //start measurement
HAL_UART_Transmit(&huart2, (uint8_t\*)"Temperature measurement started.\\r\\n", 35, HAL_MAX_DELAY);
}
//else if(input=='2')
else if(input=='2' && system==1)
{
system=0;  //stop measurement
HAL_UART_Transmit(&huart2, (uint8_t\*)"Temperature measurement stopped.\\r\\n", 35, HAL_MAX_DELAY);

//Turning off LED when measurement stops
HAL_GPIO_WritePin(GPIOA, GREEN_LED, GPIO_PIN_RESET);
HAL_GPIO_WritePin(GPIOA, RED_LED, GPIO_PIN_RESET);
}

//if(input=='1')
if(system==1)
{
float V_ref= 3.3;
char buffer\[100\];
// ADC Value from Channel 0 (First NTC)
ADC_Select_CH0();
HAL_ADC_Start(&hadc1);
HAL_ADC_PollForConversion(&hadc1, HAL_MAX_DELAY);

            adc_value1 = HAL_ADC_GetValue(&hadc1);  //Read ADC from Channel 0
            HAL_ADC_Stop(&hadc1);
    
            float voltage1= (adc_value1 / 4095.0)* V_ref;    // Convert ADC value to voltage
    
            resistance1 = (refResistance1*voltage1)/(V_ref - voltage1); //Voltage Divider Equation
            temperature_ntc1 = findTemp1(resistance1);   // Calculate temperature from resistance
    
             // ADC Value from Channel 1 (Second NTC)
             ADC_Select_CH1();
             HAL_ADC_Start(&hadc1);
             HAL_ADC_PollForConversion(&hadc1, HAL_MAX_DELAY);
             adc_value2 = HAL_ADC_GetValue(&hadc1); //Read ADC from Channel 1
             HAL_ADC_Stop(&hadc1);
    
             float voltage2= (adc_value2 / 4095.0)* V_ref;
             resistance2 = (refResistance2*voltage2)/(V_ref- voltage2);
             temperature_ntc2 = findTemp2(resistance2);
             // Check temperature differences and control the LED's
       if (fabs(temperature_ntc1 - temperature_ntc2)> 1.0)
       {
            //Temperature difference btw 2 NTC'S greater than 1 degree, RED LED should blink
            HAL_GPIO_WritePin(GPIOA, RED_LED, GPIO_PIN_SET);
            HAL_GPIO_WritePin(GPIOA, GREEN_LED, GPIO_PIN_RESET);
    
       }
       else
       {
            HAL_GPIO_WritePin(GPIOA, GREEN_LED, GPIO_PIN_SET);
            HAL_GPIO_WritePin(GPIOA, RED_LED, GPIO_PIN_RESET);
       }
    
           // Transmit the temperature values
           sprintf(buffer, "Temperature_NTC1: %.2f °C \r\n", temperature_ntc1);
           HAL_UART_Transmit(&huart2, (uint8_t*)buffer, strlen(buffer), HAL_MAX_DELAY);
           sprintf(buffer, "Temperature_NTC2: %.2f °C \r\n\r\n", temperature_ntc2);
           HAL_UART_Transmit(&huart2, (uint8_t*)buffer, strlen(buffer), HAL_MAX_DELAY);
    
           // Updating the older temperature measurements
           oldtemp1 = temperature_ntc1;
           oldtemp2= temperature_ntc2;
     }
    
    /* USER CODE BEGIN 3 */

}
/\* USER CODE END 3 \*/
}

我正在尝试计算和读取两个 NTC 热敏电阻的值，目前通过 UART 将其发送到 PuTTY 控制台。我正在使用 STM32 核板。我想输入命令“1”以连续读取和显示 PuTTY 中的值，输入命令“2”以停止测量和读取。我的代码运行良好，并且在给出此输入 ==1 和 2 命令之前连续传输值。但是在此之后，PuTTY 仅在按下“1”时显示温度值，这意味着我需要按住“1”才能显示值，没有连续传输。这是我的代码中的问题，还是在存在标志条件时无法连续传输？我想确保我的硬件连接和引脚配置是正确的，因为该值在没有输入条件的情况下连续传输。

这是我的while循环在STM32 IDE中的样子。输出现在显示“温度测量已开始，并且仅在每次都按”1“时才显示 Temperature_NTC1 和 Temperature_NTC2 的值。如果不输入“1”，我就不会获得连续的温度。我想要的是，当我输入一次“1”时，温度值会连续播放，而当我输入“2”时，温度值会停止。

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