wandering1
1166ab1c2e
问题：ADC1 在 MX_ADC1_Init() 里使能，而 DMA 在 app_main_init() 步骤 4b 才挂载，中间隔着 GD5F 全片 BBT 扫描（数秒）。台架同一次开机内用 无 DMA 单通道逐路取真值、与 DMA 路径对照，得 9/9 完美置换：乒乓缓冲 从 rank 3 开始搬，槽 i 装的是 rank ((i+1) mod 9)+1，整体错开 2 格。 表象是"接地 AIN2、UB 却读到别的通道的值"，极易误判为映射表写错或 注入点标签不对。 修法：新增 adc1_disable()（Src/adc.c 的 USER CODE BEGIN 1），在 app_main_init() 步骤 4b-pre 调用，把 ADC 置为关闭态，使能动作交给 HAL_ADC_Start_DMA() 内部完成（它自己 __HAL_ADC_ENABLE + 等 Tstab 约 20 us，紧接着开 CR2.DMA 并启流），使能与搬运之间不留可观测间隔。 顺序不可调换：本调用必须严格早于 adc_input_init()。 台架验证：在 MX_ADC1_Init() 末尾关闭 4/4 次、在 4b-pre 调本 API 3/3 次，均 UB=0；同开机对照差值 <=4 码（修前 7/7 次 UB=783~786）。 文档：ADC采样节拍设计说明.md 新增 4.5 节（9 行证据表、判据陷阱、 根因与修法）与设计铁律第 8 条。 台账：Flash 261,764 -> 261,928 B（+164，新增函数），RAM 无变化； CubeMX 存活审计基线重建（adc1-calibration-impl / adc1-dma-link 两项漂移均属本次有意改动，锚点已逐条复核在位）。
351 lines
12 KiB
C
351 lines
12 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file adc.c
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* @brief This file provides code for the configuration
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* of the ADC instances.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2026 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* USER CODE END Header */
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/* Includes ------------------------------------------------------------------*/
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#include "adc.h"
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/* USER CODE BEGIN 0 */
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/* USER CODE END 0 */
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ADC_HandleTypeDef hadc1;
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DMA_HandleTypeDef hdma_adc1;
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/* ADC1 init function */
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void MX_ADC1_Init(void)
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{
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/* USER CODE BEGIN ADC1_Init 0 */
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/* USER CODE END ADC1_Init 0 */
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ADC_ChannelConfTypeDef sConfig = {0};
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/* USER CODE BEGIN ADC1_Init 1 */
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/* USER CODE END ADC1_Init 1 */
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/** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
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*/
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hadc1.Instance = ADC1;
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hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
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hadc1.Init.Resolution = ADC_RESOLUTION_12B;
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hadc1.Init.ScanConvMode = ENABLE;
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hadc1.Init.ContinuousConvMode = DISABLE;
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hadc1.Init.DiscontinuousConvMode = DISABLE;
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hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
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hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T3_TRGO;
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hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
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hadc1.Init.NbrOfConversion = 9;
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hadc1.Init.DMAContinuousRequests = ENABLE;
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hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
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if (HAL_ADC_Init(&hadc1) != HAL_OK)
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{
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Error_Handler();
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}
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/** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
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*/
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sConfig.Channel = ADC_CHANNEL_0;
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sConfig.Rank = 1;
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sConfig.SamplingTime = ADC_SAMPLETIME_144CYCLES;
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if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
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{
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Error_Handler();
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}
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/** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
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*/
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sConfig.Channel = ADC_CHANNEL_1;
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sConfig.Rank = 2;
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if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
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{
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Error_Handler();
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}
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/** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
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*/
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sConfig.Channel = ADC_CHANNEL_2;
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sConfig.Rank = 3;
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if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
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{
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Error_Handler();
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}
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/** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
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*/
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sConfig.Channel = ADC_CHANNEL_3;
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sConfig.Rank = 4;
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if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
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{
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Error_Handler();
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}
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/** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
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*/
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sConfig.Channel = ADC_CHANNEL_4;
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sConfig.Rank = 5;
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if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
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{
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Error_Handler();
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}
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/** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
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*/
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sConfig.Channel = ADC_CHANNEL_5;
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sConfig.Rank = 6;
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if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
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{
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Error_Handler();
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}
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/** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
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*/
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sConfig.Channel = ADC_CHANNEL_6;
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sConfig.Rank = 7;
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if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
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{
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Error_Handler();
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}
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/** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
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*/
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sConfig.Channel = ADC_CHANNEL_7;
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sConfig.Rank = 8;
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if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
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{
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Error_Handler();
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}
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/** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
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*/
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sConfig.Channel = ADC_CHANNEL_14;
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sConfig.Rank = 9;
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if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
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{
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Error_Handler();
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}
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/* USER CODE BEGIN ADC1_Init 2 */
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/* STM32F4 ADC 上电**自校准**：RM0090 §13.3.6 / AN4976 要求的必需步骤，CubeMX 不生成，
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* 且本仓库的 HAL 是裁剪子集、**没有** HAL_ADCEx_Calibration_Start()（已核实
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* stm32f4xx_hal_adc_ex.c/.h 均无该函数）→ 用本文件 USER CODE BEGIN 1 里的等价实现。
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* 必须在首次转换之前完成，否则 ADC 存在失调误差（未校准的偏移可达数十 LSB）。
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* 放 USER CODE 区 = L2，重生成不丢；由 cubemx-survival 审计项 adc1-calibration 兜底。 */
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if (adc1_calibrate() != 0)
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{
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Error_Handler();
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}
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/* USER CODE END ADC1_Init 2 */
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}
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void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle)
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{
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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if(adcHandle->Instance==ADC1)
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{
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/* USER CODE BEGIN ADC1_MspInit 0 */
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/* USER CODE END ADC1_MspInit 0 */
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/* ADC1 clock enable */
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__HAL_RCC_ADC1_CLK_ENABLE();
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__HAL_RCC_GPIOA_CLK_ENABLE();
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__HAL_RCC_GPIOC_CLK_ENABLE();
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/**ADC1 GPIO Configuration
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PA0-WKUP ------> ADC1_IN0
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PA1 ------> ADC1_IN1
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PA2 ------> ADC1_IN2
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PA3 ------> ADC1_IN3
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PA4 ------> ADC1_IN4
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PA5 ------> ADC1_IN5
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PA6 ------> ADC1_IN6
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PA7 ------> ADC1_IN7
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PC4 ------> ADC1_IN14
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*/
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GPIO_InitStruct.Pin = ADC9_RES_Pin|ADC10_IC_Pin|ADC11_IN_Pin|ADC12_UC_Pin
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|ADC13_RES_Pin|ADC14_TEMP_Pin|ADC15_IB_Pin|ADC16_RES_Pin;
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GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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GPIO_InitStruct.Pin = ADC17_UB_Pin;
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GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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HAL_GPIO_Init(ADC17_UB_GPIO_Port, &GPIO_InitStruct);
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/* ADC1 DMA Init */
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/* ADC1 Init */
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hdma_adc1.Instance = DMA2_Stream4;
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hdma_adc1.Init.Channel = DMA_CHANNEL_0;
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hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;
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hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
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hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
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hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
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hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
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hdma_adc1.Init.Mode = DMA_CIRCULAR;
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hdma_adc1.Init.Priority = DMA_PRIORITY_LOW;
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hdma_adc1.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
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if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
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{
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Error_Handler();
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}
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__HAL_LINKDMA(adcHandle,DMA_Handle,hdma_adc1);
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/* USER CODE BEGIN ADC1_MspInit 1 */
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/* USER CODE END ADC1_MspInit 1 */
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}
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}
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void HAL_ADC_MspDeInit(ADC_HandleTypeDef* adcHandle)
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{
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if(adcHandle->Instance==ADC1)
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{
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/* USER CODE BEGIN ADC1_MspDeInit 0 */
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/* USER CODE END ADC1_MspDeInit 0 */
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/* Peripheral clock disable */
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__HAL_RCC_ADC1_CLK_DISABLE();
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/**ADC1 GPIO Configuration
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PA0-WKUP ------> ADC1_IN0
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PA1 ------> ADC1_IN1
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PA2 ------> ADC1_IN2
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PA3 ------> ADC1_IN3
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PA4 ------> ADC1_IN4
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PA5 ------> ADC1_IN5
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PA6 ------> ADC1_IN6
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PA7 ------> ADC1_IN7
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PC4 ------> ADC1_IN14
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*/
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HAL_GPIO_DeInit(GPIOA, ADC9_RES_Pin|ADC10_IC_Pin|ADC11_IN_Pin|ADC12_UC_Pin
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|ADC13_RES_Pin|ADC14_TEMP_Pin|ADC15_IB_Pin|ADC16_RES_Pin);
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HAL_GPIO_DeInit(ADC17_UB_GPIO_Port, ADC17_UB_Pin);
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/* ADC1 DMA DeInit */
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HAL_DMA_DeInit(adcHandle->DMA_Handle);
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/* USER CODE BEGIN ADC1_MspDeInit 1 */
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/* USER CODE END ADC1_MspDeInit 1 */
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}
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}
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/* USER CODE BEGIN 1 */
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/* CR2.CAL（bit 3）。⚠ 本仓库的 CMSIS 设备头 stm32f407xx.h 是裁剪版，**未定义**
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* ADC_CR2_CAL（已核实：CR2 只有 ADON/CONT/DMA/DDS/EOCS/ALIGN/JEXTSEL/JEXTEN/
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* JSWSTART/EXTSEL/EXTEN/SWSTART，没有 CAL）
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* → 按 RM0090 在此补齐，命名避开 CMSIS 前缀以免将来重定义冲突。 */
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#define ADC1_CAL_BIT (0x1UL << 3U)
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/* 断电/校准等待上限（ms）。CAL 实测在数十 µs 内清零，10 ms 是 100 倍以上余量 */
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#define ADC1_CAL_TIMEOUT_MS (10U)
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/* ADON 0→1 后的稳定等待（µs），同 HAL 的 ADC_STAB_DELAY_US 口径 */
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#define ADC1_STAB_DELAY_US (20U)
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/* 关闭等待上限（ms）。ADON 由硬件清零，实测在数十 ns 内完成；10 ms 是十万倍余量 */
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#define ADC1_OFF_TIMEOUT_MS (10U)
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/*
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* 函数功能：ADC1 上电自校准（等价于 HAL_ADCEx_Calibration_Start，本仓库 HAL 无此函数）
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* 入口参数：无（操作 ADC1 寄存器）
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* 返 回 值：0 - 校准完成；-1 - 等待超时（ADON 未清零 / CAL 未清零）
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* 限定条件：MX_ADC1_Init() 之后、**首次转换之前**；内核启动前可调用
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* （只用 HAL_GetTick 与寄存器，不触碰任何 CMSIS/FreeRTOS 对象）
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* 函数说明：RM0090 §13.3.6 时序——① ADC 必须处于关闭态（清 ADON 并等其生效）；
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* ② 置 ADON 上电，等 Tstab；③ 置 CAL 启动自校准；④ 完成后**硬件自动**清 CAL，
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* 等其清零即完成。校准值存在 ADC 内部偏置寄存器，此后所有转换都带上校正。
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* 缺这一步的后果不是"读不到"而是"读得有偏"——正是 §7.2 那类
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* adc1_err/异常值的候选根因之一，见 docs/硬件平台/ADC通道映射说明.md。
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*/
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int adc1_calibrate(void)
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{
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uint32_t tickstart;
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/* 1) 前置条件：ADC 必须关闭 */
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CLEAR_BIT(ADC1->CR2, ADC_CR2_ADON);
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tickstart = HAL_GetTick();
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while ((ADC1->CR2 & ADC_CR2_ADON) != 0U)
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{
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if ((HAL_GetTick() - tickstart) > ADC1_CAL_TIMEOUT_MS)
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{
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return -1;
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}
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}
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/* 2) 上电（ADON 0→1），等待稳定后再启动校准 */
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SET_BIT(ADC1->CR2, ADC_CR2_ADON);
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{
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__IO uint32_t wait_loop_index = (ADC1_STAB_DELAY_US * (SystemCoreClock / 1000000U));
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while (wait_loop_index != 0U)
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{
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wait_loop_index--;
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}
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}
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/* 3) 启动自校准，等硬件把 CAL 清零 */
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SET_BIT(ADC1->CR2, ADC1_CAL_BIT);
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tickstart = HAL_GetTick();
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while ((ADC1->CR2 & ADC1_CAL_BIT) != 0U)
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{
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if ((HAL_GetTick() - tickstart) > ADC1_CAL_TIMEOUT_MS)
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{
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return -1;
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}
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}
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return 0;
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}
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/*
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* 函数功能：关闭 ADC1（清 CR2.ADON 并等硬件清零生效）
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* 入口参数：无
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* 返 回 值：0 - 已关闭；-1 - 等待超时（ADON 未清零）
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* 限定条件：任何上下文均可（只碰 ADC1 寄存器与 HAL_GetTick）；须在挂 DMA 之前调用
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* 函数说明：**本函数的存在只为把"使能 ADC"推迟到挂 DMA 的同一刻。**
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* MX_ADC1_Init() 在 main() 里调用，而挂 DMA 在 app_main_init 步骤 4b，
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* 中间隔着 GD5F 全片 BBT 扫描（数秒）。台架实测（同一次开机内用无 DMA
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* 单通道探针取真值对照，9/9 完美置换）：ADC 使能后闲置数秒才挂 DMA，
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* DMA 乒乓缓冲会整体 +2 格旋转 —— 槽 i 装的是 rank ((i+1) mod 9)+1，
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* 即 9 路通道按 rank 序整体错开 2 位，表现为"接地 AIN2、UB 却读到别的
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* 通道的值"这种看似映射表写错的现象。
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* 调用本函数后 ADC 处于关闭态，HAL_ADC_Start_DMA 内部会自己
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* __HAL_ADC_ENABLE + 等 Tstab（~20 µs），然后紧接着开 CR2.DMA 并启流，
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* 使能与搬运之间不再有可观测的间隔 → 旋转消失（台架 4/4 次，差值 ≤4 码）。
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* 证据、复现方法与机制分析见 docs/子系统设计/ADC采样节拍设计说明.md §4.5。
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*/
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int adc1_disable(void)
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{
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uint32_t tickstart;
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CLEAR_BIT(ADC1->CR2, ADC_CR2_ADON);
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tickstart = HAL_GetTick();
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while ((ADC1->CR2 & ADC_CR2_ADON) != 0U)
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{
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if ((HAL_GetTick() - tickstart) > ADC1_OFF_TIMEOUT_MS)
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{
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return -1;
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}
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}
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return 0;
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}
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/* USER CODE END 1 */
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