Posted on September 09, 2015 at 09:02Hi.
Using STM32Cube_FW_F4_V1.6.0 demonstration code for STM32F429I-Disco board, in which USBH is configured to operate in full speed mode on HS pins.
I am having custom board where USB MSC device is interfaced with FS pins (DM-PA11, DP-PA12, VBUS-PA9 and USB-ID/USB-OC pins are connected but not configured for now). There is a enable pin at PC6 connected to /EN pin of STMPS2161STR.
Now, I have modified the demo code in usb_conf.c file as below.
&sharpdefine HOST_POWERSW_PORT GPIOC
&sharpdefine HOST_POWERSW_VBUS GPIO_PIN_6
/* Private variables ---------------------------------------------------------*/
HCD_HandleTypeDef hhcd;
void HAL_HCD_MspInit(HCD_HandleTypeDef *hhcd)
{
/* On STM32F429I-DISCO, USB OTG HS Core will operate in Full speed mode */
GPIO_InitTypeDef GPIO_InitStruct;
/*EMBEDDED Physical interface*/
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOC_CLK_ENABLE();
GPIO_InitStruct.Pin = (GPIO_PIN_11 | GPIO_PIN_12);
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Alternate = GPIO_AF10_OTG_FS;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* Configure VBUS Pin */
GPIO_InitStruct.Pin = GPIO_PIN_9;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* Enable USB HS Clocks */
__HAL_RCC_USB_OTG_FS_CLK_ENABLE();
/* Configure Power Switch Vbus Pin */
GPIO_InitStruct.Pin = HOST_POWERSW_VBUS;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(HOST_POWERSW_PORT,&GPIO_InitStruct);
/* By Default, DISABLE is needed on output of the Power Switch */
HAL_GPIO_WritePin(HOST_POWERSW_PORT, HOST_POWERSW_VBUS, GPIO_PIN_SET);
USBH_Delay(200); /* Delay is need for stabilising the Vbus Low */
/* Set USBHS Interrupt to the lowest priority */
HAL_NVIC_SetPriority(OTG_FS_IRQn, 5, 0);
/* Enable USBFS Interrupt */
HAL_NVIC_EnableIRQ(OTG_FS_IRQn);
}
void HAL_HCD_MspDeInit(HCD_HandleTypeDef *hhcd)
{
/* Disable USB HS Clocks */
__HAL_RCC_USB_OTG_FS_CLK_DISABLE();
}
USBH_StatusTypeDef USBH_LL_Init(USBH_HandleTypeDef *phost)
{
/*Set LL Driver parameters */
hhcd.Instance = USB_OTG_FS;
hhcd.Init.Host_channels = 7;
hhcd.Init.dma_enable = 1;
hhcd.Init.low_power_enable = 0;
hhcd.Init.phy_itface = HCD_PHY_EMBEDDED;
hhcd.Init.Sof_enable = 0;
hhcd.Init.speed = HCD_SPEED_FULL;
hhcd.Init.use_external_vbus = 1;
/* Link The driver to the stack */
hhcd.pData = phost;
phost->pData = &hhcd;
/*Initialize LL Driver */
if (HAL_HCD_Init(&hhcd) != HAL_OK)
{
return USBH_FAIL;
}
USBH_LL_SetTimer (phost, HAL_HCD_GetCurrentFrame(&hhcd));
return USBH_OK;
}
and in stm32f4xx_it.c file.
void OTG_FS_IRQHandler(void)
{
HAL_HCD_IRQHandler(&hhcd);
}
Now, the result is:
in usb_core.c USBH_Process(), it doesn't pass this condition. It always shows USBH_BUSY. During this process, pulses are observed at DM and DP pins.
case HOST_ENUMERATION:
/* Check for enumeration status */
if ( USBH_HandleEnum(phost) == USBH_OK)
{
/* The function shall return USBH_OK when full enumeration is complete */
USBH_UsrLog (''Enumeration done.'');
In interrupt part, upon connecting USB Device it shows SOF interrupt.
This project is based on FreeRTOS.
What could be the possible reasons for this? Kindly help.
Thanks,
Chandan
#enumeration #stm32f29 #usbmsc
