stm32adc采集轮询

### STM32 ADC Polling Example Code and Explanation For implementing ADC polling on an STM32 microcontroller, the process involves configuring the ADC peripheral to perform conversions when requested by software rather than using interrupts or DMA. The following Python-like pseudocode demonstrates how this can be achieved: ```c #include "stm32f4xx_hal.h" // Initialize ADC Peripheral static void MX_ADC1_Init(void) { hadc1.Instance = ADC1; // Configure common parameters for all ADCs (if multiple are used). ADC_CommonInitStruct.CommonClock = ADC_PERIPH_CLOCK_SYNC_DIV8; HAL_ADC_MspInit(&hadc1); } int main(void) { /* Reset of all peripherals, Initializes the Flash interface and Systick */ HAL_Init(); SystemClock_Config(); MX_GPIO_Init(); MX_ADC1_Init(); while(1){ uint32_t adcValue; if(HAL_OK == HAL_ADC_Start(&hadc1)){ if(HAL_OK == HAL_ADC_PollForConversion(&hadc1, 100)) adcValue = HAL_ADC_GetValue(&hadc1); HAL_ADC_Stop(&hadc1); // Process adcValue as needed. } // Add delay between polls here if necessary. } } ``` In this setup, `HAL_ADC_Start` initiates a conversion sequence which is then monitored with `HAL_ADC_PollForConversion`. Once completed within the specified timeout period, `HAL_ADC_GetValue` retrieves the converted value from the data register. The configuration ensures that each time through the loop, a single analog-to-digital conversion occurs at one channel before proceeding further in the program flow[^1]. #### Important Considerations - Ensure proper initialization routines (`MX_ADC1_Init`) match hardware specifications such as clock settings and pin configurations specific to your application requirements. - Adjustments may need to be made depending upon whether you're working with single-ended channels versus differential inputs. - For applications requiring higher throughput rates without blocking execution during reads, consider employing interrupt-driven methods instead of polling-based approaches.