Question
STM32 USB HS DMA stuck
Hello.
I try to setup CDC USB HS with DMA but it blocks after few samples sent.
Here is the minimal code that replicate 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_USB_DEVICE_Init();
/* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
int32_t ssss=0;
char msg2[2048];
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
sprintf(msg2, "%d\r\n", ssss);
CDC_Transmit_HS((uint8_t *) msg2, strlen(msg2));
ssss++;
HAL_Delay(10);
}
/* USER CODE END 3 */
}On the host side, I open CDC com port in putty, I begin to receive samples sents by stm32 but immediately after few sample no more lines appears.
...
It blocks here with USBD_BUSY:
I use STM32F769I-DISCO board,
STM32CubeMX Version 6.6.1
STM32Cube FW_F7 V1.17.0
CPU ICache and DCache disabled
Log output file: c:\users\victors\appdata\local\temp\stm32cubeprogrammer_a14036.log
ST-LINK SN : 0671FF555071494867091122
ST-LINK FW : V2J39M27
Board : 32F769IDISCOVERY
Voltage : 3.21V
SWD freq : 4000 KHz
Connect mode: Under Reset
Reset mode : Hardware reset
Device ID : 0x451
Revision ID : Rev Z
Device name : STM32F76x/STM32F77x
Flash size : 2 MBytes
Device type : MCU
Device CPU : Cortex-M7
BL Version : --
Memory Programming ...
Opening and parsing file: st-link_gdb_server_a14036.srec
File : st-link_gdb_server_a14036.srec
Size : 33.41 KB
Address : 0x08000000
Erasing memory corresponding to segment 0:
Erasing internal memory sectors [0 1]
Download in Progress:
If I set Enable internal IP DMA for USB_OTG_HS to disabled it works without stopping.
Could you please take a look?
Thanks