Dear Experts, I am new in using STM32H735-DK board. tried to download clock example in developement board. Download succeed but example not working. Two LEDS,LD1 & LD2 continues ON and display Blank. when i press RST button display just blink only.

[Dharmesh]

STMicroelectronics ST-LINK GDB server. Version 5.9.1

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    SWD Debug         : Enabled

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Debugger connected

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            STM32CubeProgrammer v2.8.0          

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ST-LINK SN : 001F00303438510734313939

ST-LINK FW : V3J8M3

Board    : STM32H735G-DK

Voltage   : 3.29V

SWD freq  : 24000 KHz

Connect mode: Under Reset

Reset mode : Hardware reset

Device ID  : 0x483

Revision ID : Rev Z

Device name : STM32H72x/STM32H73x

Flash size : 1 MBytes

Device type : MCU

Device CPU : Cortex-M7

BL Version : 0x92

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Opening and parsing file: ST-LINK_GDB_server_a21916.srec

 File     : ST-LINK_GDB_server_a21916.srec

 Size     : 386412 Bytes

 Address    : 0x08000000 

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Erasing external memory sectors [0 3]

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[Amel NASRI]

Hi @Dharmesh​ ,

Based on the readme file of the example STM32CubeH7/Projects/STM32H735G-DK/Examples/RCC/RCC_ClockConfig, the clock source is changed each time you press the USER button.

• LED1 is toggled with a timing defined by the HAL_Delay() API.
• LED2 is ON when there is an error.

Is that what you see as behavior?

-Amel

[Dharmesh]

Hello Amel,

Thank you for your reply.

Problem was solved when i uninstall STCube IDE,Ver_6.0 and install latest one.But again same thing happening right now. in my Discovery board when i load even simple program of one screen touch gfx,simulation working fine, firmware download succsed but LD1,LD2 continuesly Glow and display black.. When i press RESET button sitution as it is.

I am using below IDE right now,

1. st-stm32cubeide_1.9.0_12015_20220302_0855_x86_64
2. TouchGFX-4.19.1

When i tried for debugging i found firmware is not getting out from below loop of core_cm7.h file

sets = (uint32_t)(CCSIDR_SETS(ccsidr));

  do {

   ways = (uint32_t)(CCSIDR_WAYS(ccsidr));

   do {

    SCB->DCISW = (((sets << SCB_DCISW_SET_Pos) & SCB_DCISW_SET_Msk) |

           ((ways << SCB_DCISW_WAY_Pos) & SCB_DCISW_WAY_Msk) );

    #if defined ( __CC_ARM )

     __schedule_barrier();

    #endif

   } while (ways-- != 0U);

  } while(sets-- != 0U);

  __DSB();

waiting for your valueable feedback. Thank you.

[Amel NASRI]

Hi @Dharmesh​,

TouchGFX is not my area of expertise. May be @Romain DIELEMAN​  can help you at this level.

-Amel