stm32L476G-DISCO upload not working

[Kt.11]

I have a stm32L476G-DISCO.

trying to get this simple blink led program working.

CODE:

 while (1)
 {
	HAL_GPIO_TogglePin( LD_G_GPIO_Port, LD_G_Pin );
	//(LD_R_Pin);
 HAL_Delay(2000);
 /* USER CODE END WHILE */
 MX_USB_HOST_Process();
 
 /* USER CODE BEGIN 3 */
 }
 /* USER CODE END 3 */

BUILD SUCCESS:

14:08:04 **** Incremental Build of configuration Debug for project Lab2-Kava ****
make -j8 all 
arm-none-eabi-size Lab2-Kava.elf 
 text	 data	 bss	 dec	 hex	filename
 39640	 152	 4064	 43856	 ab50	Lab2-Kava.elf
Finished building: default.size.stdout
 
 
14:08:05 Build Finished. 0 errors, 0 warnings. (took 396ms)

UPLOAD ATTEMPT:

STMicroelectronics ST-LINK GDB server. Version 5.7.0
Copyright (c) 2020, STMicroelectronics. All rights reserved.
 
Starting server with the following options:
 Persistent Mode : Disabled
 Logging Level : 1
 Listen Port Number : 61234
 Status Refresh Delay : 15s
 Verbose Mode : Disabled
 SWD Debug : Enabled
 InitWhile : Enabled
 
Waiting for debugger connection...
Debugger connected
Debugger connection lost.
Shutting down...

Really baffled why its not uploading. ST made me upload the firmware on the board.

[ChahinezC]

Hello @Kt.1​,

Welcome to ST community :smiling_face_with_smiling_eyes:.

This a debugger problem. Please check the cable you are using and make sure that you have correctly configured the Debug Configuration and connected to the ST-Link on the board.

If you are using STM32CubeIDE, I recommend you checking the 3rd section of the STM32CubeIDE User Guide.

Chahinez.