Unable to recognize USB port as a device(virtual com port) when connected to PC.
@Hi,
I'm using STM32F469 MCU for my application where I'm using USB in DEVICE mode in FS.
Here I'm unable to go to the "OTG_FS_IRQHandler" interrupt handler and also the virtual comport is not recognized by the PC.
It is working fine with the Host mode, where the board is successfully detecting the pen drive and writing data to it.
The same library if I'm using with STM32F217, IT IS WORKING.
System Clock configured for 168MHz.
Here are the functions I have used
#define USB_OTG_HS_BASE_ADDR 0x40040000
#define USB_OTG_FS_BASE_ADDR 0x50000000
void usbDevInit()
{
USB_OTG_BSP_disableVBUS();
USBH_Disconnect(&USB_OTG_Core);
delay_ms(10);
usbStatus = USB_DEV;
USBD_Init(&USB_OTG_dev, USB_OTG_FS_CORE_ID, &USR_desc, &USBD_CDC_cb); // USB Device init
delay_ms(20);
}
void USBD_Init(USB_OTG_CORE_HANDLE *pdev,
USB_OTG_CORE_ID_TypeDef coreID,
USBD_DEVICE *pDevice,
USBD_Class_cb_TypeDef *class_cb)
{
/* Hardware Init */
USB_OTG_BSP_Init(pdev);
USBD_DeInit(pdev);
/*Register class and user callbacks */
pdev->dev.class_cb = class_cb;
pdev->dev.usr_device = pDevice;
/* set USB OTG core params */
DCD_Init(pdev , coreID);
/* Enable Interrupts */
USB_OTG_BSP_EnableInterrupt(pdev);
}
void USB_OTG_BSP_Init(USB_OTG_CORE_HANDLE *pdev)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOA , ENABLE);
/* Configure SOF VBUS ID DM DP Pins */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 |GPIO_Pin_11 |GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_OTG1_FS) ;
GPIO_PinAFConfig(GPIOA,GPIO_PinSource11,GPIO_AF_OTG1_FS) ;
GPIO_PinAFConfig(GPIOA,GPIO_PinSource12,GPIO_AF_OTG1_FS) ;
/* this for ID line debug */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_OTG_FS, ENABLE) ;
if(usbStatus == USB_HOST)
/* Intialize Timer for delay function */
USB_OTG_BSP_TimeInit();
}
USBD_Status USBD_DeInit(USB_OTG_CORE_HANDLE *pdev)
{
/* Software Init */
USBD_Suspend(pdev);
USB_OTG_BSP_DisableInterrupt(pdev);
return USBD_OK;
}
void DCD_Init(USB_OTG_CORE_HANDLE *pdev ,
USB_OTG_CORE_ID_TypeDef coreID)
{
uint32_t i;
USB_OTG_EP *ep;
USB_OTG_SelectCore (pdev , coreID);
pdev->dev.device_status = USB_OTG_DEFAULT;
pdev->dev.device_address = 0;
/* Init ep structure */
for (i = 0; i < pdev->cfg.dev_endpoints ; i++)
{
ep = &pdev->dev.in_ep[i];
/* Init ep structure */
ep->is_in = 1;
ep->num = i;
ep->tx_fifo_num = i;
/* Control until ep is actvated */
ep->type = EP_TYPE_CTRL;
ep->maxpacket = USB_OTG_MAX_EP0_SIZE;
ep->xfer_buff = 0;
ep->xfer_len = 0;
}
for (i = 0; i < pdev->cfg.dev_endpoints; i++)
{
ep = &pdev->dev.out_ep[i];
/* Init ep structure */
ep->is_in = 0;
ep->num = i;
ep->tx_fifo_num = i;
/* Control until ep is activated */
ep->type = EP_TYPE_CTRL;
ep->maxpacket = USB_OTG_MAX_EP0_SIZE;
ep->xfer_buff = 0;
ep->xfer_len = 0;
}
USB_OTG_DisableGlobalInt(pdev);
/*Init the Core (common init.) */
USB_OTG_CoreInit(pdev);
/* Force Device Mode*/
USB_OTG_SetCurrentMode(pdev, DEVICE_MODE);
/* Init Device */
USB_OTG_CoreInitDev(pdev);
/* Enable USB Global interrupt */
USB_OTG_EnableGlobalInt(pdev);
}
void USB_OTG_BSP_EnableInterrupt(USB_OTG_CORE_HANDLE *pdev)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = OTG_FS_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
Kindly help me in solving the issue.