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第一次使用STM32L051，涉及到AD转换功能，以前用过STM32F103的AD功能，调通了，但是L051的AD模块就是怎么也不好用，程序可以编译通过，但是就是采不到模拟端口的值，下面是我的main函数，望大神帮忙看一下，谢过了！！！（单步调试时，ADC_ISR始终为0，ADC_DR始终为0） /**main.c**/ #include "LMP91000.h" #include<stdio.h> #include"stm32l0xx_hal_rcc_ex.h" void SystemClock_Config(void); static void MX_GPIO_Init(void); static void MX_ADC_Init(void); /* Private function prototypes -----------------------------------------------*/ void Delay(__IO uint32_t nCount); //延时函数 static void Error_Handler(void); /* ADC handle declaration */ ADC_HandleTypeDef hadc; /* ADC channel configuration structure declaration */ ADC_ChannelConfTypeDef sConfig; /* Converted value declaration */ uint32_t uwConvertedValue; /* Input voltage declaration */ uint32_t uwInputVoltage; int main(void) { /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init(); SystemClock_Config(); MX_GPIO_Init(); I2C_GPIO1_Config(); I2C_GPIO2_Config(); LMP91000_PortInit(1,0); Delay(0X00FFFF); /**Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) */ hadc.Instance = ADC1; hadc.Init.OversamplingMode = DISABLE; // hadc.Init.OversamplingMode = ENABLE; // hadc.Init.Oversample.Ratio = ADC_OVERSAMPLING_RATIO_128; // hadc.Init.Oversample.RightBitShift = ADC_RIGHTBITSHIFT_3; // hadc.Init.Oversample.TriggeredMode = ADC_TRIGGEREDMODE_SINGLE_TRIGGER; hadc.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV1; hadc.Init.Resolution = ADC_RESOLUTION12b; hadc.Init.SamplingTime = ADC_SAMPLETIME_1CYCLE_5; hadc.Init.ScanDirection = ADC_SCAN_DIRECTION_UPWARD; hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT; hadc.Init.ContinuousConvMode = DISABLE; hadc.Init.DiscontinuousConvMode = DISABLE; hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIG_EDGE_NONE; hadc.Init.DMAContinuousRequests = DISABLE; hadc.Init.EOCSelection = EOC_SINGLE_CONV; hadc.Init.Overrun = OVR_DATA_PRESERVED; hadc.Init.LowPowerAutoWait = ENABLE; hadc.Init.LowPowerFrequencyMode = ENABLE; hadc.Init.LowPowerAutoOff = DISABLE; HAL_ADC_Init(&hadc); /* Initialize ADC peripheral according to the passed parameters */ if (HAL_ADC_Init(&hadc) != HAL_OK) { Error_Handler(); } /* ### -2 - Channel configuration ######################################## */ /* Select Channel 0 to be converted */ sConfig.Channel = ADC_CHANNEL_0; HAL_ADC_ConfigChannel(&hadc, &sConfig); if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK) { Error_Handler(); } /* ### - 3 - Start calibration ############################################ */ if (HAL_ADCEx_Calibration_Start(&hadc, ADC_SINGLE_ENDED) != HAL_OK) { Error_Handler(); } /* ### - 4 - Start conversion ############################################# */ if (HAL_ADC_Start(&hadc) != HAL_OK) { Error_Handler(); } HAL_ADC_PollForConversion(&hadc, 10); //等待转换结束 if(HAL_ADC_GetState(&hadc)==HAL_ADC_STATE_EOC) { Delay(0x00FFFF); //uwConvertedValue = HAL_ADC_GetValue(&hadc); uwConvertedValue = hadc.Instance->DR; /* Convert the result from 16 bit value to the voltage dimsension */ /* Vref = 3.3 V */ uwInputVoltage = (uwConvertedValue * 3300) / 0xFFF0; } while (1) { } /* USER CODE END 3 */ } /** System Clock Configuration */ void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct; RCC_ClkInitTypeDef RCC_ClkInitStruct; __PWR_CLK_ENABLE(); __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI; RCC_OscInitStruct.MSIState = RCC_MSI_ON; RCC_OscInitStruct.MSICalibrationValue = 0; RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_5; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; HAL_RCC_OscConfig(&RCC_OscInitStruct); RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0); HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000); HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK); /* SysTick_IRQn interrupt configuration */ HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0); } /** Configure pins as * Analog * Input * Output * EVENT_OUT * EXTI */ void MX_GPIO_Init(void) { GPIO_InitTypeDef GPIO_InitStruct; /* GPIO Ports Clock Enable */ __GPIOA_CLK_ENABLE(); /*Configure GPIO pin : PA9(KEY1) PA3(MENB_O2)*/ GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_3; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FAST; HAL_GPIO_WritePin(GPIOA, GPIO_PIN_9, GPIO_PIN_SET); HAL_GPIO_WritePin(GPIOA, GPIO_PIN_3, GPIO_PIN_RESET); HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); /*Configure GPIO pin : PA0(AN_O2_1) PA6(L1_VOLT) AD模拟输入*/ GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_6; GPIO_InitStruct.Mode = GPIO_MODE_ANALOG; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FAST; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); } /* USER CODE BEGIN 4 */ /******************************************************************************************** 延时函数void Delay(__IO uint32_t nCount) *******************************************************************************************/ void Delay(__IO uint32_t nCount) { while(nCount--) { } } /* USER CODE END 4 */ static void Error_Handler(void) { while(1) { } } #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 * @retval None */ void assert_failed(uint8_t* file, uint32_t line) { /* USER CODE BEGIN 6 */ /* 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) */ /* USER CODE END 6 */ } #endif /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
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还有看一下SC（状态控制寄存器）、标志位的配置