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Display Is Blank With FreeRTOS And TouchGFX
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2026-03-21 1:35 PM - edited 2026-03-21 4:44 PM
I created a GUI with TouchGFX, enabled UART and created a custom task in freeRTOS in STMCubeMX. When running the code the display is just blank when I add this code inside of my custom task
if(xQueueReceive(queueHandle, &message, 0) == pdPASS)
{
printf("Message received");
}If I comment this code out the gui displays. However, I found something interesting that if I debug and set a breakpoint at the for(;;) loop statement on line 729 in main in the UART_Task and another breakpoint on the print message and then press play to continue, the GUI displays and when I tap a button on my GUI I get to the breakpoint on the printf message which is exactly what I'm trying to do and it works perfectly. I'm not sure why it works when I first breakpoint there, but won't work just loading the program onto the board. Here is the main code
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2023 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "FreeRTOS.h"
#include "queue.h"
#include "cmsis_os2.h"
#include "app_touchgfx.h"
#include "stdio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
CRC_HandleTypeDef hcrc;
DMA2D_HandleTypeDef hdma2d;
GPU2D_HandleTypeDef hgpu2d;
I2C_HandleTypeDef hi2c1;
JPEG_HandleTypeDef hjpeg;
DMA_HandleTypeDef handle_HPDMA1_Channel1;
DMA_HandleTypeDef handle_HPDMA1_Channel0;
LTDC_HandleTypeDef hltdc;
UART_HandleTypeDef huart7;
/* Definitions for defaultTask */
osThreadId_t defaultTaskHandle;
const osThreadAttr_t defaultTask_attributes = {
.name = "defaultTask",
.stack_size = 128 * 4,
.priority = (osPriority_t) osPriorityNormal,
};
/* Definitions for TouchGFXTask */
osThreadId_t TouchGFXTaskHandle;
const osThreadAttr_t TouchGFXTask_attributes = {
.name = "TouchGFXTask",
.stack_size = 4096 * 4,
.priority = (osPriority_t) osPriorityNormal,
};
/* Definitions for UARTTask */
osThreadId_t UARTTaskHandle;
const osThreadAttr_t UARTTask_attributes = {
.name = "UARTTask",
.stack_size = 128 * 4,
.priority = (osPriority_t) osPriorityBelowNormal,
};
/* Definitions for messageQueue */
osMessageQueueId_t messageQueueHandle;
const osMessageQueueAttr_t messageQueue_attributes = {
.name = "messageQueue"
};
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
static void MPU_Config(void);
static void MX_GPIO_Init(void);
static void MX_HPDMA1_Init(void);
static void MX_LTDC_Init(void);
static void MX_CRC_Init(void);
static void MX_DMA2D_Init(void);
static void MX_JPEG_Init(void);
static void MX_FLASH_Init(void);
static void MX_I2C1_Init(void);
static void MX_GPU2D_Init(void);
static void MX_ICACHE_GPU2D_Init(void);
static void MX_UART7_Init(void);
void StartDefaultTask(void *argument);
extern void TouchGFX_Task(void *argument);
void UART_Task(void *argument);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MPU Configuration--------------------------------------------------------*/
MPU_Config();
/* Enable the CPU Cache */
/* Enable I-Cache---------------------------------------------------------*/
SCB_EnableICache();
/* Enable D-Cache---------------------------------------------------------*/
SCB_EnableDCache();
/* MCU Configuration--------------------------------------------------------*/
/* Update SystemCoreClock variable according to RCC registers values. */
SystemCoreClockUpdate();
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_HPDMA1_Init();
MX_LTDC_Init();
MX_CRC_Init();
MX_DMA2D_Init();
MX_JPEG_Init();
MX_FLASH_Init();
MX_I2C1_Init();
MX_GPU2D_Init();
MX_ICACHE_GPU2D_Init();
MX_UART7_Init();
MX_TouchGFX_Init();
/* Call PreOsInit function */
MX_TouchGFX_PreOSInit();
/* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Init scheduler */
osKernelInitialize();
/* USER CODE BEGIN RTOS_MUTEX */
/* add mutexes, ... */
/* USER CODE END RTOS_MUTEX */
/* USER CODE BEGIN RTOS_SEMAPHORES */
/* add semaphores, ... */
/* USER CODE END RTOS_SEMAPHORES */
/* USER CODE BEGIN RTOS_TIMERS */
/* start timers, add new ones, ... */
/* USER CODE END RTOS_TIMERS */
/* Create the queue(s) */
/* creation of messageQueue */
messageQueueHandle = osMessageQueueNew (16, sizeof(uint16_t), &messageQueue_attributes);
/* USER CODE BEGIN RTOS_QUEUES */
/* add queues, ... */
/* USER CODE END RTOS_QUEUES */
/* Create the thread(s) */
/* creation of defaultTask */
defaultTaskHandle = osThreadNew(StartDefaultTask, NULL, &defaultTask_attributes);
/* creation of TouchGFXTask */
TouchGFXTaskHandle = osThreadNew(TouchGFX_Task, NULL, &TouchGFXTask_attributes);
/* creation of UARTTask */
UARTTaskHandle = osThreadNew(UART_Task, NULL, &UARTTask_attributes);
/* USER CODE BEGIN RTOS_THREADS */
/* add threads, ... */
/* USER CODE END RTOS_THREADS */
/* USER CODE BEGIN RTOS_EVENTS */
/* add events, ... */
/* USER CODE END RTOS_EVENTS */
/* Start scheduler */
osKernelStart();
/* We should never get here as control is now taken by the scheduler */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief CRC Initialization Function
* None
* @retval None
*/
static void MX_CRC_Init(void)
{
/* USER CODE BEGIN CRC_Init 0 */
/* USER CODE END CRC_Init 0 */
/* USER CODE BEGIN CRC_Init 1 */
/* USER CODE END CRC_Init 1 */
hcrc.Instance = CRC;
hcrc.Init.DefaultPolynomialUse = DEFAULT_POLYNOMIAL_ENABLE;
hcrc.Init.DefaultInitValueUse = DEFAULT_INIT_VALUE_ENABLE;
hcrc.Init.InputDataInversionMode = CRC_INPUTDATA_INVERSION_NONE;
hcrc.Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_DISABLE;
hcrc.InputDataFormat = CRC_INPUTDATA_FORMAT_BYTES;
if (HAL_CRC_Init(&hcrc) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN CRC_Init 2 */
/* USER CODE END CRC_Init 2 */
}
/**
* @brief DMA2D Initialization Function
* None
* @retval None
*/
static void MX_DMA2D_Init(void)
{
/* USER CODE BEGIN DMA2D_Init 0 */
/* USER CODE END DMA2D_Init 0 */
/* USER CODE BEGIN DMA2D_Init 1 */
/* USER CODE END DMA2D_Init 1 */
hdma2d.Instance = DMA2D;
hdma2d.Init.Mode = DMA2D_R2M;
hdma2d.Init.ColorMode = DMA2D_OUTPUT_RGB888;
hdma2d.Init.OutputOffset = 0;
if (HAL_DMA2D_Init(&hdma2d) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN DMA2D_Init 2 */
/* USER CODE END DMA2D_Init 2 */
}
/**
* @brief FLASH Initialization Function
* None
* @retval None
*/
static void MX_FLASH_Init(void)
{
/* USER CODE BEGIN FLASH_Init 0 */
/* USER CODE END FLASH_Init 0 */
FLASH_OBProgramInitTypeDef pOBInit = {0};
/* USER CODE BEGIN FLASH_Init 1 */
/* USER CODE END FLASH_Init 1 */
HAL_FLASHEx_OBGetConfig(&pOBInit);
if ((pOBInit.USERConfig1 & OB_IWDG_SW) != OB_IWDG_SW||
(pOBInit.USERConfig1 & OB_XSPI1_HSLV_ENABLE) != OB_XSPI1_HSLV_ENABLE||
(pOBInit.USERConfig1 & OB_XSPI2_HSLV_ENABLE) != OB_XSPI2_HSLV_ENABLE||
(pOBInit.USERConfig2 & OB_I2C_NI3C_I2C) != OB_I2C_NI3C_I2C)
{
if (HAL_FLASH_Unlock() != HAL_OK)
{
Error_Handler();
}
if (HAL_FLASH_OB_Unlock() != HAL_OK)
{
Error_Handler();
}
pOBInit.OptionType = OPTIONBYTE_USER;
pOBInit.USERType = OB_USER_IWDG_SW|OB_USER_XSPI1_HSLV
|OB_USER_XSPI2_HSLV|OB_USER_I2C_NI3C;
pOBInit.USERConfig1 = OB_IWDG_SW|OB_XSPI1_HSLV_ENABLE
|OB_XSPI2_HSLV_ENABLE;
pOBInit.USERConfig2 = OB_I2C_NI3C_I2C;
if (HAL_FLASHEx_OBProgram(&pOBInit) != HAL_OK)
{
Error_Handler();
}
if (HAL_FLASH_OB_Lock() != HAL_OK)
{
Error_Handler();
}
if (HAL_FLASH_Lock() != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE BEGIN FLASH_Init 2 */
/* USER CODE END FLASH_Init 2 */
}
/**
* @brief GPU2D Initialization Function
* None
* @retval None
*/
static void MX_GPU2D_Init(void)
{
/* USER CODE BEGIN GPU2D_Init 0 */
/* USER CODE END GPU2D_Init 0 */
/* USER CODE BEGIN GPU2D_Init 1 */
/* USER CODE END GPU2D_Init 1 */
hgpu2d.Instance = GPU2D;
if (HAL_GPU2D_Init(&hgpu2d) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN GPU2D_Init 2 */
/* USER CODE END GPU2D_Init 2 */
}
/**
* @brief HPDMA1 Initialization Function
* None
* @retval None
*/
static void MX_HPDMA1_Init(void)
{
/* USER CODE BEGIN HPDMA1_Init 0 */
/* USER CODE END HPDMA1_Init 0 */
/* Peripheral clock enable */
__HAL_RCC_HPDMA1_CLK_ENABLE();
/* HPDMA1 interrupt Init */
HAL_NVIC_SetPriority(HPDMA1_Channel0_IRQn, 5, 0);
HAL_NVIC_EnableIRQ(HPDMA1_Channel0_IRQn);
HAL_NVIC_SetPriority(HPDMA1_Channel1_IRQn, 5, 0);
HAL_NVIC_EnableIRQ(HPDMA1_Channel1_IRQn);
/* USER CODE BEGIN HPDMA1_Init 1 */
/* USER CODE END HPDMA1_Init 1 */
/* USER CODE BEGIN HPDMA1_Init 2 */
/* USER CODE END HPDMA1_Init 2 */
}
/**
* @brief I2C1 Initialization Function
* None
* @retval None
*/
static void MX_I2C1_Init(void)
{
/* USER CODE BEGIN I2C1_Init 0 */
/* USER CODE END I2C1_Init 0 */
/* USER CODE BEGIN I2C1_Init 1 */
/* USER CODE END I2C1_Init 1 */
hi2c1.Instance = I2C1;
hi2c1.Init.Timing = 0x00E063FF;
hi2c1.Init.OwnAddress1 = 0;
hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c1.Init.OwnAddress2 = 0;
hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c1) != HAL_OK)
{
Error_Handler();
}
/** Configure Analogue filter
*/
if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
{
Error_Handler();
}
/** Configure Digital filter
*/
if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN I2C1_Init 2 */
/* USER CODE END I2C1_Init 2 */
}
/**
* @brief ICACHE_GPU2D Initialization Function
* None
* @retval None
*/
static void MX_ICACHE_GPU2D_Init(void)
{
/* USER CODE BEGIN ICACHE_GPU2D_Init 0 */
/* USER CODE END ICACHE_GPU2D_Init 0 */
/* USER CODE BEGIN ICACHE_GPU2D_Init 1 */
/* USER CODE END ICACHE_GPU2D_Init 1 */
/** Enable instruction cache (default 2-ways set associative cache)
*/
if (HAL_ICACHE_Enable() != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN ICACHE_GPU2D_Init 2 */
/* USER CODE END ICACHE_GPU2D_Init 2 */
}
/**
* @brief JPEG Initialization Function
* None
* @retval None
*/
static void MX_JPEG_Init(void)
{
/* USER CODE BEGIN JPEG_Init 0 */
/* USER CODE END JPEG_Init 0 */
/* USER CODE BEGIN JPEG_Init 1 */
/* USER CODE END JPEG_Init 1 */
hjpeg.Instance = JPEG;
if (HAL_JPEG_Init(&hjpeg) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN JPEG_Init 2 */
/* USER CODE END JPEG_Init 2 */
}
/**
* @brief LTDC Initialization Function
* None
* @retval None
*/
static void MX_LTDC_Init(void)
{
/* USER CODE BEGIN LTDC_Init 0 */
/* USER CODE END LTDC_Init 0 */
LTDC_LayerCfgTypeDef pLayerCfg = {0};
/* USER CODE BEGIN LTDC_Init 1 */
/* USER CODE END LTDC_Init 1 */
hltdc.Instance = LTDC;
hltdc.Init.HSPolarity = LTDC_HSPOLARITY_AL;
hltdc.Init.VSPolarity = LTDC_VSPOLARITY_AL;
hltdc.Init.DEPolarity = LTDC_DEPOLARITY_AL;
hltdc.Init.PCPolarity = LTDC_PCPOLARITY_IPC;
hltdc.Init.HorizontalSync = 4;
hltdc.Init.VerticalSync = 4;
hltdc.Init.AccumulatedHBP = 12;
hltdc.Init.AccumulatedVBP = 12;
hltdc.Init.AccumulatedActiveW = 812;
hltdc.Init.AccumulatedActiveH = 492;
hltdc.Init.TotalWidth = 820;
hltdc.Init.TotalHeigh = 506;
hltdc.Init.Backcolor.Blue = 0;
hltdc.Init.Backcolor.Green = 0;
hltdc.Init.Backcolor.Red = 0;
if (HAL_LTDC_Init(&hltdc) != HAL_OK)
{
Error_Handler();
}
pLayerCfg.WindowX0 = 0;
pLayerCfg.WindowX1 = 800;
pLayerCfg.WindowY0 = 0;
pLayerCfg.WindowY1 = 480;
pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_RGB565;
pLayerCfg.Alpha = 255;
pLayerCfg.Alpha0 = 0;
pLayerCfg.BlendingFactor1 = LTDC_BLENDING_FACTOR1_CA;
pLayerCfg.BlendingFactor2 = LTDC_BLENDING_FACTOR2_CA;
pLayerCfg.FBStartAdress = 0;
pLayerCfg.ImageWidth = 800;
pLayerCfg.ImageHeight = 480;
pLayerCfg.Backcolor.Blue = 0;
pLayerCfg.Backcolor.Green = 0;
pLayerCfg.Backcolor.Red = 0;
if (HAL_LTDC_ConfigLayer(&hltdc, &pLayerCfg, 0) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN LTDC_Init 2 */
/* USER CODE END LTDC_Init 2 */
}
/**
* @brief UART7 Initialization Function
* None
* @retval None
*/
static void MX_UART7_Init(void)
{
/* USER CODE BEGIN UART7_Init 0 */
/* USER CODE END UART7_Init 0 */
/* USER CODE BEGIN UART7_Init 1 */
/* USER CODE END UART7_Init 1 */
huart7.Instance = UART7;
huart7.Init.BaudRate = 115200;
huart7.Init.WordLength = UART_WORDLENGTH_8B;
huart7.Init.StopBits = UART_STOPBITS_1;
huart7.Init.Parity = UART_PARITY_NONE;
huart7.Init.Mode = UART_MODE_TX_RX;
huart7.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart7.Init.OverSampling = UART_OVERSAMPLING_16;
huart7.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart7.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart7.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart7) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&huart7, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&huart7, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_DisableFifoMode(&huart7) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN UART7_Init 2 */
/* USER CODE END UART7_Init 2 */
}
/**
* @brief GPIO Initialization Function
* None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOG_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOE_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOF, FRAME_RATE_Pin|RENDER_TIME_Pin|MCU_ACTIVE_Pin|VSYNC_FREQ_Pin, GPIO_PIN_RESET);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(LCD_EN_GPIO_Port, LCD_EN_Pin, GPIO_PIN_SET);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(LCD_BL_CTRL_GPIO_Port, LCD_BL_CTRL_Pin, GPIO_PIN_SET);
/*Configure GPIO pins : FRAME_RATE_Pin RENDER_TIME_Pin VSYNC_FREQ_Pin */
GPIO_InitStruct.Pin = FRAME_RATE_Pin|RENDER_TIME_Pin|VSYNC_FREQ_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_MEDIUM;
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
/*Configure GPIO pin : MCU_ACTIVE_Pin */
GPIO_InitStruct.Pin = MCU_ACTIVE_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(MCU_ACTIVE_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin : LCD_EN_Pin */
GPIO_InitStruct.Pin = LCD_EN_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LCD_EN_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin : TP_IRQ_Pin */
GPIO_InitStruct.Pin = TP_IRQ_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
HAL_GPIO_Init(TP_IRQ_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin : LCD_BL_CTRL_Pin */
GPIO_InitStruct.Pin = LCD_BL_CTRL_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LCD_BL_CTRL_GPIO_Port, &GPIO_InitStruct);
/* EXTI interrupt init*/
HAL_NVIC_SetPriority(TP_IRQ_EXTI_IRQn, 5, 0);
HAL_NVIC_EnableIRQ(TP_IRQ_EXTI_IRQn);
/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/* USER CODE BEGIN Header_StartDefaultTask */
/**
* @brief Function implementing the defaultTask thread.
* argument: Not used
* @retval None
*/
/* USER CODE END Header_StartDefaultTask */
void StartDefaultTask(void *argument)
{
/* USER CODE BEGIN 5 */
/* Infinite loop */
for(;;)
{
osDelay(1);
}
/* USER CODE END 5 */
}
/* USER CODE BEGIN Header_UART_Task */
/**
* @brief Function implementing the UARTTask thread.
* argument: Not used
* @retval None
*/
extern QueueHandle_t queueHandle;
extern unsigned char message;
/* USER CODE END Header_UART_Task */
void UART_Task(void *argument)
{
/* USER CODE BEGIN UART_Task */
/* Infinite loop */
for(;;)
{
osDelay(1);
if(xQueueReceive(queueHandle, &message, 0) == pdPASS)
{
printf("Message received");
}
}
/* USER CODE END UART_Task */
}
/* MPU Configuration */
static void MPU_Config(void)
{
MPU_Region_InitTypeDef MPU_InitStruct = {0};
/* Disables the MPU */
HAL_MPU_Disable();
/* Disables all MPU regions */
for(uint8_t i=0; i<__MPU_REGIONCOUNT; i++)
{
HAL_MPU_DisableRegion(i);
}
/** Initializes and configures the Region and the memory to be protected
*/
MPU_InitStruct.Enable = MPU_REGION_ENABLE;
MPU_InitStruct.Number = MPU_REGION_NUMBER0;
MPU_InitStruct.BaseAddress = 0x0;
MPU_InitStruct.Size = MPU_REGION_SIZE_4GB;
MPU_InitStruct.SubRegionDisable = 0x87;
MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
MPU_InitStruct.AccessPermission = MPU_REGION_NO_ACCESS;
MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_DISABLE;
MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;
HAL_MPU_ConfigRegion(&MPU_InitStruct);
/** Initializes and configures the Region and the memory to be protected
*/
MPU_InitStruct.Number = MPU_REGION_NUMBER1;
MPU_InitStruct.BaseAddress = 0x70000000;
MPU_InitStruct.Size = MPU_REGION_SIZE_128MB;
MPU_InitStruct.SubRegionDisable = 0x0;
MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL1;
MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE;
MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE;
MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;
HAL_MPU_ConfigRegion(&MPU_InitStruct);
/** Initializes and configures the Region and the memory to be protected
*/
MPU_InitStruct.Number = MPU_REGION_NUMBER2;
MPU_InitStruct.Size = MPU_REGION_SIZE_2MB;
MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;
HAL_MPU_ConfigRegion(&MPU_InitStruct);
/** Initializes and configures the Region and the memory to be protected
*/
MPU_InitStruct.Number = MPU_REGION_NUMBER3;
MPU_InitStruct.BaseAddress = 0x90000000;
MPU_InitStruct.Size = MPU_REGION_SIZE_32MB;
MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_DISABLE;
MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;
HAL_MPU_ConfigRegion(&MPU_InitStruct);
/** Initializes and configures the Region and the memory to be protected
*/
MPU_InitStruct.Number = MPU_REGION_NUMBER4;
MPU_InitStruct.BaseAddress = 0x20000000;
MPU_InitStruct.Size = MPU_REGION_SIZE_64KB;
HAL_MPU_ConfigRegion(&MPU_InitStruct);
/** Initializes and configures the Region and the memory to be protected
*/
MPU_InitStruct.Number = MPU_REGION_NUMBER5;
MPU_InitStruct.BaseAddress = 0x24000000;
MPU_InitStruct.Size = MPU_REGION_SIZE_512KB;
MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE;
MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;
HAL_MPU_ConfigRegion(&MPU_InitStruct);
/** Initializes and configures the Region and the memory to be protected
*/
MPU_InitStruct.Number = MPU_REGION_NUMBER6;
MPU_InitStruct.BaseAddress = 0x2406c000;
MPU_InitStruct.Size = MPU_REGION_SIZE_16KB;
MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
HAL_MPU_ConfigRegion(&MPU_InitStruct);
/** Initializes and configures the Region and the memory to be protected
*/
MPU_InitStruct.Number = MPU_REGION_NUMBER7;
MPU_InitStruct.BaseAddress = 0x24070000;
MPU_InitStruct.Size = MPU_REGION_SIZE_8KB;
HAL_MPU_ConfigRegion(&MPU_InitStruct);
/* Enables the MPU */
HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);
}
/**
* @brief Period elapsed callback in non blocking mode
* @note This function is called when TIM6 interrupt took place, inside
* HAL_TIM_IRQHandler(). It makes a direct call to HAL_IncTick() to increment
* a global variable "uwTick" used as application time base.
* htim TIM handle
* @retval None
*/
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
/* USER CODE BEGIN Callback 0 */
/* USER CODE END Callback 0 */
if (htim->Instance == TIM6) {
HAL_IncTick();
}
/* USER CODE BEGIN Callback 1 */
/* USER CODE END Callback 1 */
}
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* file: pointer to the source file name
* line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
And here is the code from my main display and I'm sending a message through a xQueue from my display to the freeRTOS entry task
#include <gui/maindisplay_screen/MainDisplayView.hpp>
#include "stdio.h"
#include "FreeRTOS.h"
#include "queue.h"
extern "C"
{
unsigned char message[8] = { "hello" };
QueueHandle_t queueHandle;
}
MainDisplayView::MainDisplayView()
{
queueHandle = xQueueCreate(10, sizeof(unsigned char));
}
void MainDisplayView::setupScreen()
{
MainDisplayViewBase::setupScreen();
}
void MainDisplayView::tearDownScreen()
{
MainDisplayViewBase::tearDownScreen();
}
void MainDisplayView::advertiseBLE() {
xQueueSend(queueHandle, &message, 0);
}Solved! Go to Solution.
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TouchGFX
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2026-03-21 5:10 PM
I figured it out. I added a bigger delay in my UART_Task of osDelay(200) and it works like a charm.
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2026-03-21 5:10 PM
I figured it out. I added a bigger delay in my UART_Task of osDelay(200) and it works like a charm.
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