- static void MX_ADC1_Init(void)
- {
- /* USER CODE BEGIN ADC1_Init 0 */
- /* USER CODE END ADC1_Init 0 */
- ADC_MultiModeTypeDef multimode = {0};
- ADC_ChannelConfTypeDef sConfig = {0};
- /* USER CODE BEGIN ADC1_Init 1 */
- /* USER CODE END ADC1_Init 1 */
- /** Common config
- */
- hadc1.Instance = ADC1;
- hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
- hadc1.Init.Resolution = ADC_RESOLUTION_12B;
- hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
- hadc1.Init.GainCompensation = VDDA_APPLI * GAIN_COMPENSATION_X1_FACTOR / DIGITAL_SCALE_12BITS; //敲黑板
- hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
- hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
- hadc1.Init.LowPowerAutoWait = DISABLE;
- hadc1.Init.ContinuousConvMode = DISABLE;
- hadc1.Init.NbrOfConversion = 1;
- hadc1.Init.DiscontinuousConvMode = DISABLE;
- hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIG_T1_TRGO;
- hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
- hadc1.Init.DMAContinuousRequests = ENABLE;
- hadc1.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
- hadc1.Init.OversamplingMode = DISABLE;
- if (HAL_ADC_Init(&hadc1) != HAL_OK)
- {
- Error_Handler();
- }
- /** Configure the ADC multi-mode
- */
- multimode.Mode = ADC_MODE_INDEPENDENT;
- if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK)
- {
- Error_Handler();
- }
- /** Configure Regular Channel
- */
- sConfig.Channel = ADC_CHANNEL_6;
- sConfig.Rank = ADC_REGULAR_RANK_1;
- sConfig.SamplingTime = ADC_SAMPLETIME_640CYCLES_5;
- sConfig.SingleDiff = ADC_SINGLE_ENDED;
- sConfig.OffsetNumber = ADC_OFFSET_NONE;
- sConfig.Offset = 0;
- if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
- {
- Error_Handler();
- }
- /* USER CODE BEGIN ADC1_Init 2 */
- /* USER CODE END ADC1_Init 2 */
- }
接下来看另一套例程，讲的是利用失调补偿来实现偏置设置，达到改变范围的效果，测试如下：
输入恒定为0~3.3V的情况下，可以将转换结果扩展到-2048---2047，也可以将0-1.65V定为2048-4095等，应用比较灵活，主要代码如下
- modeIndex++;
- if (modeIndex >= sizeof(modeString)/sizeof(modeString[0])) modeIndex = 0;
-
- /* Reconfigure offset */
- sConfig.Channel = ADC_CHANNEL_6;
- sConfig.Rank = ADC_REGULAR_RANK_1;
- sConfig.SamplingTime = ADC_SAMPLETIME_640CYCLES_5;
- sConfig.SingleDiff = ADC_SINGLE_ENDED;
- sConfig.OffsetNumber = modeString[modeIndex].number;
- sConfig.Offset = modeString[modeIndex].offset;
- sConfig.OffsetSign = modeString[modeIndex].sign;
- sConfig.OffsetSaturation = modeString[modeIndex].satur;
- if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
- {
- Error_Handler();
- }
- //设置的参数表如下
- <div class="blockcode"><blockquote>uint16_t modeIndex = 0;
- const t_offsetcfg modeString[5] = {
- {ADC_OFFSET_NONE, 0, ADC_OFFSET_SIGN_NEGATIVE, DISABLE, "Cfg #0: Offset disabled"},
- {ADC_OFFSET_1, 0x800, ADC_OFFSET_SIGN_NEGATIVE, DISABLE, "Cfg #1: Offset enabled, sign is negative & saturation disabled"},
- {ADC_OFFSET_1, 0x800, ADC_OFFSET_SIGN_POSITIVE, DISABLE, "Cfg #2: Offset enabled, sign is positive & saturation disabled"},
- {ADC_OFFSET_1, 0x800, ADC_OFFSET_SIGN_NEGATIVE, ENABLE, "Cfg #3: Offset enabled, sign is negative & saturation enabled"},
- {ADC_OFFSET_1, 0x800, ADC_OFFSET_SIGN_POSITIVE, ENABLE, "Cfg #4: Offset enabled, sign is positive & saturation enabled"},
- };
第一次接触HAL库还是18年初的时候，经过这么久的迭代，包括CubeMX工具的更新以及CubeIDE的诞生，代码移植性越来越好，开发效率也提高了很多。基于CubeMX的HAL实现，在不同芯片间的代码复用率显著提升。手里这块G474更是应运而生，提升了F系列的性能，更具性价比。接下来继续体验Nucleo G4的其他优势功能。
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