DSI display interface doesn't work

PZamb.2 · ‎2023-05-16

Hi

I'm development a board with STM32F779a cpu connect with dsi display.

I create the graphic wit TouchFX tools and included in the STM32cube ide design software.

How example I see STM32f769i-disco demo, and received the init code of display by producer.

My problem is that the DSI Host not run, no signal appare , I'm monitoring with oscilloscopie.

What may be the problem ?

int main(void)

{

/* USER CODE BEGIN 1 */

/* USER CODE END 1 */

/* MCU Configuration--------------------------------------------------------*/

/* Reset of all peripherals, Initializes the Flash interface and the Systick. */

HAL_Init();

/* USER CODE BEGIN Init */

/* USER CODE END Init */

/* Configure the system clock */

SystemClock_Config();

/* USER CODE BEGIN SysInit */

/* USER CODE END SysInit */

/* Initialize all configured peripherals */

MX_GPIO_Init();

MX_LTDC_Init();

MX_CRC_Init();

MX_DSIHOST_DSI_Init();

MX_FMC_Init();

MX_QUADSPI_Init();

MX_DMA2D_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 */

/* 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);

/* 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 */

}

PZamb.2 · ‎2023-05-16

static void MX_DSIHOST_DSI_Init(void)

{

/* USER CODE BEGIN DSIHOST_Init 0 */

// Reset DSI Display

HAL_GPIO_WritePin(DSI_reset_GPIO_Port, DSI_reset_Pin, GPIO_PIN_RESET);

HAL_Delay(20);

HAL_GPIO_WritePin(DSI_reset_GPIO_Port, DSI_reset_Pin, GPIO_PIN_SET);

HAL_Delay(20);

/* USER CODE END DSIHOST_Init 0 */

DSI_PLLInitTypeDef PLLInit = {0};

DSI_HOST_TimeoutTypeDef HostTimeouts = {0};

DSI_PHY_TimerTypeDef PhyTimings = {0};

DSI_LPCmdTypeDef LPCmd = {0};

DSI_CmdCfgTypeDef CmdCfg = {0};

/* USER CODE BEGIN DSIHOST_Init 1 */

/* USER CODE END DSIHOST_Init 1 */

hdsi.Instance = DSI;

hdsi.Init.AutomaticClockLaneControl = DSI_AUTO_CLK_LANE_CTRL_DISABLE;

hdsi.Init.TXEscapeCkdiv = 3;

hdsi.Init.NumberOfLanes = DSI_TWO_DATA_LANES;

PLLInit.PLLNDIV = 103;

PLLInit.PLLIDF = DSI_PLL_IN_DIV7;

PLLInit.PLLODF = DSI_PLL_OUT_DIV1;

if (HAL_DSI_Init(&hdsi, &PLLInit) != HAL_OK)

{

Error_Handler();

}

HostTimeouts.TimeoutCkdiv = 1;

HostTimeouts.HighSpeedTransmissionTimeout = 0;

HostTimeouts.LowPowerReceptionTimeout = 0;

HostTimeouts.HighSpeedReadTimeout = 0;

HostTimeouts.LowPowerReadTimeout = 0;

HostTimeouts.HighSpeedWriteTimeout = 0;

HostTimeouts.HighSpeedWritePrespMode = DSI_HS_PM_DISABLE;

HostTimeouts.LowPowerWriteTimeout = 0;

HostTimeouts.BTATimeout = 0;

if (HAL_DSI_ConfigHostTimeouts(&hdsi, &HostTimeouts) != HAL_OK)

{

Error_Handler();

}

PhyTimings.ClockLaneHS2LPTime = 24;

PhyTimings.ClockLaneLP2HSTime = 25;

PhyTimings.DataLaneHS2LPTime = 13;

PhyTimings.DataLaneLP2HSTime = 18;

PhyTimings.DataLaneMaxReadTime = 0;

PhyTimings.StopWaitTime = 0;

if (HAL_DSI_ConfigPhyTimer(&hdsi, &PhyTimings) != HAL_OK)

{

Error_Handler();

}

if (HAL_DSI_ConfigFlowControl(&hdsi, DSI_FLOW_CONTROL_BTA) != HAL_OK)

{

Error_Handler();

}

if (HAL_DSI_SetLowPowerRXFilter(&hdsi, 10000) != HAL_OK)

{

Error_Handler();

}

if (HAL_DSI_ConfigErrorMonitor(&hdsi, HAL_DSI_ERROR_NONE) != HAL_OK)

{

Error_Handler();

}

LPCmd.LPGenShortWriteNoP = DSI_LP_GSW0P_ENABLE;

LPCmd.LPGenShortWriteOneP = DSI_LP_GSW1P_ENABLE;

LPCmd.LPGenShortWriteTwoP = DSI_LP_GSW2P_ENABLE;

LPCmd.LPGenShortReadNoP = DSI_LP_GSR0P_ENABLE;

LPCmd.LPGenShortReadOneP = DSI_LP_GSR1P_ENABLE;

LPCmd.LPGenShortReadTwoP = DSI_LP_GSR2P_ENABLE;

LPCmd.LPGenLongWrite = DSI_LP_GLW_ENABLE;

LPCmd.LPDcsShortWriteNoP = DSI_LP_DSW0P_ENABLE;

LPCmd.LPDcsShortWriteOneP = DSI_LP_DSW1P_ENABLE;

LPCmd.LPDcsShortReadNoP = DSI_LP_DSR0P_ENABLE;

LPCmd.LPDcsLongWrite = DSI_LP_DLW_ENABLE;

LPCmd.LPMaxReadPacket = DSI_LP_MRDP_ENABLE;

LPCmd.AcknowledgeRequest = DSI_ACKNOWLEDGE_ENABLE;

if (HAL_DSI_ConfigCommand(&hdsi, &LPCmd) != HAL_OK)

{

Error_Handler();

}

CmdCfg.VirtualChannelID = 0;

CmdCfg.ColorCoding = DSI_RGB565;

CmdCfg.CommandSize = 200;

CmdCfg.TearingEffectSource = DSI_TE_EXTERNAL;

CmdCfg.TearingEffectPolarity = DSI_TE_RISING_EDGE;

CmdCfg.HSPolarity = DSI_HSYNC_ACTIVE_LOW;

CmdCfg.VSPolarity = DSI_VSYNC_ACTIVE_LOW;

CmdCfg.DEPolarity = DSI_DATA_ENABLE_ACTIVE_HIGH;

CmdCfg.VSyncPol = DSI_VSYNC_FALLING;

CmdCfg.AutomaticRefresh = DSI_AR_DISABLE;

CmdCfg.TEAcknowledgeRequest = DSI_TE_ACKNOWLEDGE_ENABLE;

if (HAL_DSI_ConfigAdaptedCommandMode(&hdsi, &CmdCfg) != HAL_OK)

{

Error_Handler();

}

if (HAL_DSI_SetGenericVCID(&hdsi, 0) != HAL_OK)

{

Error_Handler();

}

/* USER CODE BEGIN DSIHOST_Init 2 */

/* USER CODE END DSIHOST_Init 2 */

}

/**

* @brief LTDC Initialization Function

* @param 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 = 23;

hltdc.Init.VerticalSync = 3;

hltdc.Init.AccumulatedHBP = 73;

hltdc.Init.AccumulatedVBP = 23;

hltdc.Init.AccumulatedActiveW = 873;

hltdc.Init.AccumulatedActiveH = 823;

hltdc.Init.TotalWidth = 923;

hltdc.Init.TotalHeigh = 831;

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 = 800;

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 = 0xC0000000;

pLayerCfg.ImageWidth = 800;

pLayerCfg.ImageHeight = 800;

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 */

__HAL_LTDC_DISABLE(&hltdc);

DSI_LPCmdTypeDef LPCmd;

HAL_DSI_Start(&hdsi);

MLT034S32_setup();

//HAL_DSI_ShortWrite(&hdsi, 0, DSI_DCS_SHORT_PKT_WRITE_P1, OTM8009A_CMD_DISPOFF, 0x00);

//DSI_IO_WriteCmd();

LPCmd.LPGenShortWriteNoP = DSI_LP_GSW0P_DISABLE;

LPCmd.LPGenShortWriteOneP = DSI_LP_GSW1P_DISABLE;

LPCmd.LPGenShortWriteTwoP = DSI_LP_GSW2P_DISABLE;

LPCmd.LPGenShortReadNoP = DSI_LP_GSR0P_DISABLE;

LPCmd.LPGenShortReadOneP = DSI_LP_GSR1P_DISABLE;

LPCmd.LPGenShortReadTwoP = DSI_LP_GSR2P_DISABLE;

LPCmd.LPGenLongWrite = DSI_LP_GLW_DISABLE;

LPCmd.LPDcsShortWriteNoP = DSI_LP_DSW0P_DISABLE;

LPCmd.LPDcsShortWriteOneP = DSI_LP_DSW1P_DISABLE;

LPCmd.LPDcsShortReadNoP = DSI_LP_DSR0P_DISABLE;

LPCmd.LPDcsLongWrite = DSI_LP_DLW_DISABLE;

HAL_DSI_ConfigCommand(&hdsi, &LPCmd);

HAL_LTDC_SetPitch(&hltdc, 800, 0);

__HAL_LTDC_ENABLE(&hltdc);

/* USER CODE END LTDC_Init 2 */

}

MM..1 · ‎2023-05-16

Primary all this lines is in bad order in LTDC you start unconfigured DSI

 MX_GPIO_Init();
 MX_LTDC_Init();
 MX_CRC_Init();
 MX_DSIHOST_DSI_Init();
 MX_FMC_Init();
 MX_QUADSPI_Init();
 MX_DMA2D_Init();

PZamb.2 · ‎2023-05-16

Hi yes is true but is the automatic compiler, all run i must move DSIhost under LTDC

I modify the interface protocole to DSI 24Bit (Display datasheet is poor of information) and now the signal run.

PZamb.2 · ‎2023-05-18

I don't understand because the TouchGFx application doesn't work.

I try with another application board based of same cpu but different display , i think of configured all device , memory Sdram work and external flash is loaded, configuration string from display productor.

The Touchgfx not start, i place the breakpoint to screenviewbase.cpp but the routines doesen't call.

PZamb.2 · ‎2023-05-18

I chage the position but not work

May be some parameter is wrong

PZamb.2 · ‎2023-05-18

PZamb.2 · ‎2023-05-18

PZamb.2 · ‎2023-05-18

PZamb.2 · ‎2023-05-18

This is my .project file:

<?xml version="1.0" encoding="UTF-8"?>

<name>Pomelli_test_funzioni</name>

</projects>

<name>org.eclipse.cdt.managedbuilder.core.genmakebuilder</name>

<triggers>clean,full,incremental,</triggers>

</arguments>

</buildCommand>

<name>org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder</name>

<triggers>full,incremental,</triggers>

</arguments>

</buildCommand>

</buildSpec>

<nature>com.st.stm32cube.ide.mcu.MCUProjectNature</nature>

<nature>com.st.stm32cube.ide.mcu.MCUCubeProjectNature</nature>

<nature>org.eclipse.cdt.core.cnature</nature>

<nature>com.st.stm32cube.ide.mcu.MCUCubeIdeServicesRevAev2ProjectNature</nature>

<nature>com.st.stm32cube.ide.mcu.MCUAdvancedStructureProjectNature</nature>

<nature>com.st.stm32cube.ide.mcu.MCUSingleCpuProjectNature</nature>

<nature>com.st.stm32cube.ide.mcu.MCURootProjectNature</nature>

<nature>org.eclipse.cdt.managedbuilder.core.managedBuildNature</nature>

<nature>org.eclipse.cdt.managedbuilder.core.ScannerConfigNature</nature>

<nature>org.eclipse.cdt.core.ccnature</nature>

</natures>

</projectDescription>