stm32l476g-discovery ADC转换LCD显示
想请各位大佬，看看原因出在哪里，怎么修改。（现在LCD上显示00.0，没数字，感觉是ADC转化写错了，并没有转换）main.c 文件（其中部分代码来自网络，只是学习目的，没有其他目的。）
1.#include "stm32l4xx.h"2.#include "stm32l476g_discovery.h"3.#include "adc.h"4.#include "dma.h"5.#include "stm32l476g_discovery_glass_lcd.h"6.#include "stdlib.h"7.#include "stdio.h"8.//#include "main.h"9. 10. void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc);11. /* USER CODE BEGIN 0 */12. uint32_t uhADCxConvertedValue;13. uint32_t oldvalue;14. unsigned long shijian=0;15. volatile uint8_t dmaflage=0;16. ADC_HandleTypeDef hadc1;17. void SystemClock_Config(void)18. {19. RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};20. RCC_OscInitTypeDef RCC_OscInitStruct = {0};21. // MSI is enabled after System reset, activate PLL withMSI as source22. RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;23. RCC_OscInitStruct.MSIState = RCC_MSI_ON;24. RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;25. RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;26. RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;27. RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;28. RCC_OscInitStruct.PLL.PLLM = 1;29. RCC_OscInitStruct.PLL.PLLN = 40;30. RCC_OscInitStruct.PLL.PLLR = 2;31. RCC_OscInitStruct.PLL.PLLP = 7;32. RCC_OscInitStruct.PLL.PLLQ = 4;33. if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)34. {35. // Initialization Error36. BSP_LED_On(LED_RED);37. while(1);38. }39. // Select PLL as system clock source and configure theHCLK, PCLK1 and PCLK240. //clocks dividers41. RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK| RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);42. RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;43. RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;44. RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;45. RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;46. if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct,FLASH_LATENCY_4) != HAL_OK)47. {48. // Initialization Error49. while(1);50. }51. }52.53. /* USER CODE END 0 */54. int main(void)55. {56. /* USER CODE BEGIN 1 */57. uint16_t ad1=0; //ad2=0;58. /* USER CODE END 1 */59. /* MCU60. Configuration----------------------------------------------------------*/61. /* Reset of all peripherals, Initializes the Flashinterface and the Systick. */62. HAL_Init();63. /* Configure the system clock */64. SystemClock_Config();65. /* Initialize all configured peripherals */66. //MX_GPIO_Init();67. BSP_LCD_GLASS_Init();68. BSP_LED_Init(LED_RED);69. BSP_LED_Init(LED_GREEN);70. DMA_conf();71. ADC1_conf();72. /* USER CODE BEGIN 2 */73. #if DEBUG_ENABLE74. debugInit(115200);75. #endif76. int a1,b1,c1;77. char a;78. char b;79. char c;80. char d[]="M";81. char e[]="P";82. char f[]="S";83. shijian=HAL_GetTick();84. //ADC_Cmd(ADC1,ENABLE);85. HAL_ADC_Start_DMA(&hadc1, (uint32_t*)&uhADCxConvertedValue,1);86. //ADC_SOFTWARESTARTCONVCMD(ADC1,ENABLE);87. if(uhADCxConvertedValue!=0){ //printf("HAL_ADC_Start_DMA\r\n");88. BSP_LED_On(LED_RED);89. HAL_Delay(100);90. BSP_LED_On(LED_GREEN);91. HAL_Delay(100);92. //if(uhADCxConvertedValue==oldvalue)93. BSP_LED_Off(LED_RED);94. HAL_Delay(100);95. dmaflage=1;96. }97. while (1)98. {99. if(HAL_GetTick()-shijian>=500)100. {101. if(dmaflage==1)102. {103. dmaflage=0;104. //ad1 = uhADCxConvertedValue;105. //ad2 = uhADCxConvertedValue;106. /*printf("ad1=%d,Vad1=%0.2\r\n",ad1,ad1*3.3/4096);//UNIT IS FV107. ad1 = (ad1*330)/4096; //扩大100倍 ,3.3V, 4096=12bit108. printf("V100ad1=%d\r\n",ad1);109. HAL_ADC_Start_DMA(&hadc1,(uint32_t*)&uhADCxConvertedValue,2);110. ad1 = 0;*/111. ad1 = (float)uhADCxConvertedValue*330/4069;112. 113. a1=(ad1/100 );114. b1=(ad1%100/10);115. c1=(ad1%100%10/1);116. itoa (a1, a, 10);117. itoa (b1, b, 10);118. itoa (c1, c, 10);119. BSP_LCD_GLASS_DisplayChar(a,POINT_OFF,DOUBLEPOINT_OFF,LCD_DIGIT_POSITION_1);120. BSP_LCD_GLASS_DisplayChar(b,POINT_ON,DOUBLEPOINT_OFF,LCD_DIGIT_POSITION_2);121. BSP_LCD_GLASS_DisplayChar(c,POINT_OFF,DOUBLEPOINT_OFF,LCD_DIGIT_POSITION_3);122. BSP_LCD_GLASS_DisplayChar(d,POINT_OFF,DOUBLEPOINT_OFF,LCD_DIGIT_POSITION_4);//M123. BSP_LCD_GLASS_DisplayChar(e,POINT_OFF,DOUBLEPOINT_OFF,LCD_DIGIT_POSITION_5);//P124. BSP_LCD_GLASS_DisplayChar(f,POINT_OFF,DOUBLEPOINT_OFF,LCD_DIGIT_POSITION_6);//S125. 126. }127. shijian=HAL_GetTick();128. }129. }130. }131. 132. void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)133. {134. dmaflage=1;135. //--------- HAL_ADC_Stop_DMA(&hadc1);136. }
adc.c 文件内容：1.#include "stm32l4xx.h"2.#include "stm32l476g_discovery.h"3.#include "adc.h"4.#include "stm32l4xx_hal_adc.h"5.ADC_HandleTypeDef hadc1;6.DMA_HandleTypeDef hdma_adc1;7. 8.ADC_ChannelConfTypeDef sConfig;9. 10. void ADC1_conf(void)11. {12. HAL_Init();// HAL Init13. /**Configure the global features of the ADC (Clock,Resolution, Data,Alignment and number of conversion) */14. hadc1.Instance = ADC1;15. hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;16. hadc1.Init.Resolution = ADC_RESOLUTION_12B;17. hadc1.Init.ScanConvMode = ENABLE; //upward18. hadc1.Init.ContinuousConvMode = ENABLE;19. hadc1.Init.DiscontinuousConvMode = DISABLE;20. hadc1.Init.ExternalTrigConvEdge = ADC_SOFTWARE_START; //software trigger21. hadc1.Init.ExternalTrigConvEdge=ADC_EXTERNALTRIGCONVEDGE_RISING; //rising edge22. hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT; //< Data right alignment23. hadc1.Init.NbrOfConversion = 2; /* Thisparameter must be a number between Min_Data = 1 and Max_Data = 16.24. Note:This parameter must be modified when no conversion is on going on regular group(ADC disabled,25. orADC enabled without continuous mode or external trigger that could launch aconversion). */26. hadc1.Init.DMAContinuousRequests = ENABLE;27. hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;28. /**Configure for the selected ADC regular channel itscorresponding rank in the sequencer and its sample time. */29. sConfig.Channel = ADC_CHANNEL_5;30. sConfig.Rank = 1;31. sConfig.SamplingTime = ADC_SAMPLETIME_12CYCLES_5;//Sampling time12.5 ADC clock cycles at ADC resolution 12 bits.32. HAL_ADC_ConfigChannel(&hadc1,&sConfig);33. /**Configure for the selected ADC regular channel itscorresponding rank in the sequencer and its sample time. */34. sConfig.Channel = ADC_CHANNEL_3;35. sConfig.Rank = 2;36. HAL_ADC_ConfigChannel(&hadc1,&sConfig);37.38. }39.40. void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)41. {42. GPIO_InitTypeDef GPIO_InitStruct;43. if(hadc->Instance==ADC1)44. {45. /* Peripheral clock enable */46. __HAL_RCC_ADC_CLK_ENABLE();47. /**ADC1 GPIO ConfigurationPA0-WKUP ------> ADC1_IN5*/48. GPIO_InitStruct.Pin = GPIO_PIN_0; //input port49. GPIO_InitStruct.Mode = GPIO_MODE_ANALOG_ADC_CONTROL; //////analog inputMODEGPIO_MODE_ANALOG;50. GPIO_InitStruct.Pull = GPIO_NOPULL; //no pull51. HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);52. /* Peripheral DMA init*/53. hdma_adc1.Instance = DMA1_Channel1;54. hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;55. hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;56. hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;57. hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;58. hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;59. hdma_adc1.Init.Mode = DMA_CIRCULAR;60. hdma_adc1.Init.Priority = DMA_PRIORITY_MEDIUM;61. HAL_DMA_Init(&hdma_adc1);62.63. __HAL_LINKDMA(hadc,DMA_Handle,hdma_adc1);64. }65. }66.67. void HAL_ADC_MspDeInit(ADC_HandleTypeDef* hadc)68. {69. if(hadc->Instance==ADC1)70. {71. /* Peripheral clock disable */72. __HAL_RCC_ADC_CLK_DISABLE();73.74. /**ADC1 GPIO Configuration75. PA0-WKUP ------> ADC1_IN5 PC14 ------> ADC1_IN3 */76. HAL_GPIO_DeInit(GPIOA, GPIO_PIN_0); //PA0 //HAL_GPIO_DeInit(GPIOC, GPIO_PIN_14);//PC1477. /* Peripheral DMA DeInit*/78. HAL_DMA_DeInit(hadc->DMA_Handle);79. }80. }
dma.c内容：1. //#include"stm32l4xx.h"2. //#include"stm32l476g_discovery.h"3. #include "dma.h"4. void DMA_conf(void)5. {6. /* DMA controller clock enable */7. __HAL_RCC_DMA1_CLK_ENABLE();8. // __HAL_RCC_DMA2_CLK_ENABLE();9. /* NVIC configuration for DMA Input datainterrupt */10. //Nested Vectored InterruptController (NVIC)11. //set the priority of NVIC12. HAL_NVIC_SetPriority(1,5,1);//DMA1_Channel1_IRQn,RCC_IRQn, 0WWDG_IRQn : stm32l476xx.h13. HAL_NVIC_EnableIRQ(1);//DMA1_Channel1_IRQn14.}
建议您试试串口输出一下ADC呢，看看有没有正常的值。 单步调试，先确定ADC值正确，然后查看定义的数据类型与LCD显示函数的参数是否匹配。 单步调试，将断点打在关键点位置，查看关键变量是否正常。。。 建议使用truestudio的IDE，可以分析出运行过程中的变量 要先区分是哪位分的问题？如果LCD显示的数据可以直接给个ADC数据去显示看看是否正常？正常后可以专心查找ADC问题，这样排除法可能会快一点:)
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