Please let me know how to use CDC (USB device) with STM503RB to open Com port

[LukeJang522]

Hi,

I'm trying to set up the CDC  with my H053RB board. and I found a guide on following link.

https://community.st.com/t5/stm32-mcus/how-to-use-stmicroelectronics-classic-usb-device-middleware-with/ta-p/599274

But I realized there was issue about HardFault_Handler. it happened all the time even though I commented  out the ICACHE line as below.

MX_GPIO_Init(); //MX_ICACHE_Init(); MX_USART1_UART_Init(); MX_USART3_UART_Init(); MX_USB_PCD_Init(); /* USER CODE BEGIN 2 */ while(hUsbDeviceFS.pClassData == NULL); //HAL_Delay(8); // Minimum needed delay MX_ICACHE_Init(); /* USER CODE END 2 */   /* Infinite loop */

I'm wondering if there are any workaround for this issue. 

Thanks,

Luke.

 

[STTwo-32]

Hello @LukeJang522 

I suggest you to take a look at this example. It should be helpful.

Best Regards.

STTwo-32 

[LukeJang522]

STTwo-32,

Thank you for your reply. 

I'm trying to generate the code that you sent the link, but there's errors. 

1. there is no tx_api.h file.

app_threadx.h /* Includes ------------------------------------------------------------------*/ #include "tx_api.h"

2. even I copy the file forcibly, there are another errors as below

In file included from ../Core/Src/app_threadx.c:22: ../Core/Inc/app_threadx.h:64:1: error: unknown type name 'UINT' 64 | UINT App_ThreadX_Init(VOID *memory_ptr); | ^~~~ ../Core/Inc/app_threadx.h:64:23: error: unknown type name 'VOID' 64 | UINT App_ThreadX_Init(VOID *memory_ptr); | ^~~~ ../Core/Src/app_threadx.c:59:1: error: unknown type name 'UINT' 59 | UINT App_ThreadX_Init(VOID *memory_ptr) | ^~~~ ../Core/Src/app_threadx.c:59:23: error: unknown type name 'VOID' 59 | UINT App_ThreadX_Init(VOID *memory_ptr)

3. It seems like I can't just use the code, it might needs something else. 

I wasn't also able to generate the code by UX_Device_CDC_ACM.ioc file. 

I'm not sure there is another example or not. Could you please help me to fix it?

 

Thanks.