stm32使用笔记

1. adc使用

参考文章

static void MX_Adc_DMA_Init(void)
{/* DMA controller clock enable */__HAL_RCC_DMA1_CLK_ENABLE();/* DMA interrupt init *//* DMA1_Channel1_IRQn interrupt configuration */HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
}
static int MX_ADC1_Init(void)
{ADC_ChannelConfTypeDef sConfig = {0};// ------------------DMA Init 结构体参数 初始化--------------------------MX_Adc_DMA_Init();  // 必须在前面/** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) */hadc1.Instance = ADC1;hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;hadc1.Init.Resolution = ADC_RESOLUTION_8B;hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;hadc1.Init.LowPowerAutoWait = DISABLE;hadc1.Init.LowPowerAutoPowerOff = DISABLE;hadc1.Init.ContinuousConvMode = DISABLE;hadc1.Init.NbrOfConversion = 1;hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;hadc1.Init.DMAContinuousRequests = ENABLE;hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;hadc1.Init.SamplingTimeCommon1 = ADC_SAMPLETIME_1CYCLE_5;hadc1.Init.SamplingTimeCommon2 = ADC_SAMPLETIME_1CYCLE_5;hadc1.Init.OversamplingMode = DISABLE;hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH;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_SAMPLINGTIME_COMMON_1;if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK){Error_Handler();}/* USER CODE BEGIN ADC1_Init 2 */HAL_ADCEx_Calibration_Start(&hadc1);/* USER CODE END ADC1_Init 2 */// HAL_ADC_Start_DMA(&hadc1, (uint32_t*)&adc_value, sizeof(adc_value)  / 2 - 8);return 0;
}/*** @brief  ADC 中断回调函数* @param  None* @retval None*/
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* AdcHandle)
{HAL_ADC_Stop_DMA(AdcHandle);// HAL_ADC_Start_DMA(AdcHandle, (uint32_t*)&adc_val, 1);// uint16_t val = HAL_ADC_GetValue(AdcHandle);// printf("adc -> %d\n",adc_val[0]);ecbm_modbus_cmd_write_reg(LED_ADC, adc_val[0]);
}

2. uart使用

uart配饰初始化

/* DMA 必须在前初始化 */__HAL_RCC_DMA1_CLK_ENABLE();HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);/* usart init */dev->uart.Init.BaudRate = baudrate;dev->uart.Init.WordLength = UART_WORDLENGTH_8B;dev->uart.Init.StopBits = UART_STOPBITS_1;dev->uart.Init.Parity = UART_PARITY_NONE;dev->uart.Init.Mode = UART_MODE_TX_RX;dev->uart.Init.HwFlowCtl = UART_HWCONTROL_NONE;dev->uart.Init.OverSampling = UART_OVERSAMPLING_16;dev->uart.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;dev->uart.Init.ClockPrescaler = UART_PRESCALER_DIV1;dev->uart.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;if (HAL_UART_Init(&dev->uart) != HAL_OK){}

msp 中初始化

        RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};/* USER CODE END USART1_MspInit 0 *//* Peripheral clock enable */PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1;PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK1;if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK){Error_Handler();}/* Peripheral clock enable */__HAL_RCC_USART1_CLK_ENABLE();__HAL_RCC_GPIOA_CLK_ENABLE();GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10;GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;GPIO_InitStruct.Alternate = GPIO_AF1_USART1;HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);/* USART1_RX Init */hdma_usart1_rx.Instance = DMA1_Channel1;hdma_usart1_rx.Init.Request = DMA_REQUEST_USART1_RX;hdma_usart1_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;hdma_usart1_rx.Init.PeriphInc = DMA_PINC_DISABLE;hdma_usart1_rx.Init.MemInc = DMA_MINC_ENABLE;hdma_usart1_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;hdma_usart1_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;hdma_usart1_rx.Init.Mode = DMA_CIRCULAR;hdma_usart1_rx.Init.Priority = DMA_PRIORITY_LOW;if (HAL_DMA_Init(&hdma_usart1_rx) != HAL_OK){Error_Handler();}__HAL_LINKDMA(huart,hdmarx,hdma_usart1_rx);/* USART1 interrupt Init */HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);HAL_NVIC_EnableIRQ(USART1_IRQn);

中断服务函数

void USART1_IRQHandler(void)
{uint32_t tmp_flag = 0;uint32_t temp;tmp_flag =__HAL_UART_GET_FLAG(&modbus_dev.uart, UART_FLAG_IDLE);                  // 获取IDLE标志使if((tmp_flag != RESET))                                                      // idle标志被置使{__HAL_UART_CLEAR_IDLEFLAG(&modbus_dev.uart);                                  // 清除标志使HAL_UART_DMAStop(&modbus_dev.uart);temp =  __HAL_DMA_GET_COUNTER(&hdma_usart1_rx);                          // 获取DMA中未传输的数据个敿modbus_dev.r_len = sizeof(modbus_dev.r_buf) - temp;                                // 总计数减去未传输的数据个数，得到已经接收的数据个敿rt_sem_release(&modbus_dev.rece_sem);//HAL_UART_Transmit(&uart2.uart, uart2.r_buf, uart2.r_len, 1000);}//HAL_UART_Receive_DMA(&uart2.uart, (uint8_t*)uart2.r_buf, sizeof(uart2.r_buf));HAL_UART_IRQHandler(&modbus_dev.uart);
}