RTX Keil和ADC_DMA，没有进入GUI_thread

Question

你好，我开始编程STM32F769I_Eval了。

我是编写Cortex M4和使用RTOS的绝对初学者。我使用了基本示例来开始。

现在我想使用带有DMA的ADC来显示LCD的电流值。我之前在没有RTOS的简单示例中尝试过这个，它运行良好。

但是现在我构建了一个新项目，但显示仍然很暗。似乎，在使用HAL_ADC_START_DMA（...）后它挂起了。如果我注释掉这一行，GUI 将显示在显示屏上。

#include "main.h"
#include "Board_LED.h"                  // ::Board Support:LED
#include "stm32f769i_eval_sdram.h"      // Keil.STM32F769I-EVAL::Board 
#include "stm32f7xx_hal.h"              // Keil::Device:STM32Cube HAL:Common
#include "GUI.h"                        // Segger.MDK-Pro::Graphics:CORE
#include "cmsis_os.h"
#include "RTE_Components.h"             // Component selection

#ifdef _RTE_
#include "RTE_Components.h"             // Component selection
#endif
#ifdef RTE_CMSIS_RTOS                   
#include "cmsis_os.h"                   // CMSIS RTOS header file
#endif
#ifdef RTE_CMSIS_RTOS_RTX
extern uint32_t os_time;
uint32_t HAL_GetTick(void) { 
  return os_time; 
}
#endif
/* ADC handler declaration */
ADC_HandleTypeDef    AdcHandle;
__IO uint16_t uhADCxConvertedValue = 0;
int32_t JTemp = 0x0;
static void SystemClock_Config(void);
static void Error_Handler(void);
static void MPU_Config(void);
static void CPU_CACHE_Enable(void);
extern int Init_GUIThread (void);
static void ADC_Config(void);
int main(void)
{
  MPU_Config();
  CPU_CACHE_Enable();
#ifdef RTE_CMSIS_RTOS                   // when using CMSIS RTOS
  osKernelInitialize();                 // initialize CMSIS-RTOS
#endif
  HAL_Init();
  LED_Initialize();
    BSP_SDRAM_Init();
  SystemClock_Config();
  ADC_Config();
HAL_ADC_Start_DMA(&AdcHandle, (uint32_t*)&uhADCxConvertedValue, 1);

#ifdef RTE_CMSIS_RTOS                   
        osKernelStart();                      // start thread execution 
        Init_GUIThread ();
        GUI_Init();
#endif
  /* Infinite loop */
  while (1)
  {
        HAL_Delay(1000);
        osDelay(25);
  }
}

static void ADC_Config(void)
{
  ADC_ChannelConfTypeDef sConfig;
  /* Configure the ADC peripheral */
  AdcHandle.Instance          = ADCx;
  AdcHandle.Init.ClockPrescaler        = ADC_CLOCKPRESCALER_PCLK_DIV4;
  AdcHandle.Init.Resolution            = ADC_RESOLUTION_12B;
  AdcHandle.Init.ScanConvMode          = DISABLE;                       
  AdcHandle.Init.ContinuousConvMode    = ENABLE;                        
  AdcHandle.Init.DiscontinuousConvMode = DISABLE;                       
  AdcHandle.Init.NbrOfDiscConversion   = 0;
  AdcHandle.Init.ExternalTrigConvEdge  = ADC_EXTERNALTRIGCONVEDGE_NONE;        
  AdcHandle.Init.ExternalTrigConv      = ADC_EXTERNALTRIGCONV_T1_CC1;
  AdcHandle.Init.DataAlign             = ADC_DATAALIGN_RIGHT;
  AdcHandle.Init.NbrOfConversion       = 1;
  AdcHandle.Init.DMAContinuousRequests = ENABLE;
  AdcHandle.Init.EOCSelection          = DISABLE;
  if (HAL_ADC_Init(&AdcHandle) != HAL_OK)
  {
    /* ADC initialization Error */
    Error_Handler();
  }
  sConfig.Channel = ADC_CHANNEL_8;
  sConfig.Rank = 1;
  sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
  sConfig.Offset = 0;
  if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK)
  {
    /* Channel Configuration Error */
    Error_Handler();
  }
}
static void Error_Handler(void)
{
    LED_On(1);
  /* User may add here some code to deal with this error */
  while(1)
  {
  }
}

如果有人能帮助我，我会很高兴。我也非常感谢一些指南，书籍或类似的东西。

Answer 1

看起来ADC时钟未启用。你实现HAL_ADC_MspInit函数（通常在stm32f7xx_hal_msp.c文件中实现）吗？

还是第二个变体，你称之为"HAL_IncTick"功能吗？