STM32F4-Discovery - problem with USB OTG

[bkdi]

Posted on December 16, 2012 at 17:56

Hi,

I have a problem with usb. My board is set as a device. On PC I have an application, which was programmed in C#. I want to change the state of the diodes on Discovery with the press of appropriate keys. The communication work good, but I can only send 72 packages of data, so I can press key 72 times and when I press key one more, the communication is suspended. I can't find the place in my code, where there is a fault. I don't know too, what I should make with PD5 (OverCurrent) and PC0 (PowerOn)? Settings of GPIO and RCC:

RCC_AHB1PeriphClockCmd(RCC_AHB1ENR_GPIOAEN, ENABLE); 
GPIO_InitTypeDef GPIO_Settings; 
GPIO_Settings.GPIO_Mode = GPIO_Mode_AF; 
GPIO_Settings.GPIO_OType = GPIO_OType_PP; 
GPIO_Settings.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_11 | GPIO_Pin_12; 
GPIO_Settings.GPIO_PuPd = GPIO_PuPd_NOPULL; 
GPIO_Settings.GPIO_Speed = GPIO_Speed_100MHz; 
GPIO_Init(GPIOA, &GPIO_Settings); 
GPIO_Settings.GPIO_OType = GPIO_OType_OD; 
GPIO_Settings.GPIO_Pin = GPIO_Pin_10; 
GPIO_Settings.GPIO_PuPd = GPIO_PuPd_UP ; 
GPIO_Init(GPIOA, &GPIO_Settings); 
GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_OTG_FS); 
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_OTG_FS); 
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_OTG_FS); 
GPIO_PinAFConfig(GPIOA, GPIO_PinSource11, GPIO_AF_OTG_FS); 
GPIO_PinAFConfig(GPIOA, GPIO_PinSource12, GPIO_AF_OTG_FS); 
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); 
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_OTG_FS, ENABLE); 
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);

Descriptors (Configuration, interface, HID, endpoints):

__ALIGN_BEGIN static uint8_t USBD_HID_CfgDesc[USB_HID_CONFIG_DESC_SIZ] __ALIGN_END = 
{ 
0x09, /* bLength: Configuration Descriptor size */ 
USB_CONFIGURATION_DESCRIPTOR_TYPE, /* bDescriptorType: Configuration */ 
USB_HID_CONFIG_DESC_SIZ, /* wTotalLength: Bytes returned */ 
0x00, 
0x01, /*bNumInterfaces: 1 interface*/ 
0x01, /*bConfigurationValue: Configuration value*/ 
0x00, /*iConfiguration: Index of string descriptor describing the configuration*/ 
0xE0, /*bmAttributes: bus powered and Support Remote Wake-up */ 
0x32, /*MaxPower 100 mA: this current is used for detecting Vbus*/ 
/************** Descriptor of Joystick Mouse interface ****************/ 
/* 09 */ 
0x09, /*bLength: Interface Descriptor size*/ 
USB_INTERFACE_DESCRIPTOR_TYPE,/*bDescriptorType: Interface descriptor type*/ 
0x00, /*bInterfaceNumber: Number of Interface*/ 
0x00, /*bAlternateSetting: Alternate setting*/ 
0x02, /*bNumEndpoints*/ 
0x03, /*bInterfaceClass: HID*/ 
0x01, /*bInterfaceSubClass : 1=BOOT, 0=no boot*/ 
0x02, /*nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse*/ 
0, /*iInterface: Index of string descriptor*/ 
/******************** Descriptor of Joystick Mouse HID ********************/ 
/* 18 */ 
0x09, /*bLength: HID Descriptor size*/ 
HID_DESCRIPTOR_TYPE, /*bDescriptorType: HID*/ 
0x11, /*bcdHID: HID Class Spec release number*/ 
0x01, 
0x00, /*bCountryCode: Hardware target country*/ 
0x01, /*bNumDescriptors: Number of HID class descriptors to follow*/ 
0x22, /*bDescriptorType*/ 
HID_MOUSE_REPORT_DESC_SIZE,/*wItemLength: Total length of Report descriptor*/ 
0x00, 
/******************** Descriptor of endpoint ********************/ 
/* 27 */ 
0x07, /*bLength: Endpoint Descriptor size*/ 
USB_ENDPOINT_DESCRIPTOR_TYPE, /*bDescriptorType:*/ 
HID_IN_EP, /*bEndpointAddress: Endpoint Address (IN) (from device to host)*/ 
0x03, /*bmAttributes: Interrupt endpoint*/ 
HID_IN_PACKET, /*wMaxPacketSize: 2 Byte max */ 
0x00, 
0x0A, /*bInterval: Polling Interval (10 ms)*/ 
/* 34 */ 
0x07, /*bLength: Endpoint Descriptor size*/ 
USB_ENDPOINT_DESCRIPTOR_TYPE, /*bDescriptorType:*/ 
HID_OUT_EP, /*bEndpointAddress: Endpoint Address (OUT)*/ 
0x03, /*bmAttributes: Interrupt endpoint*/ 
HID_OUT_PACKET,/*wMaxPacketSize*/ 
0x00, 
0x0A, /*bInterval: Polling Interval (10 ms)*/ 
/* 41 */ 
} ; /* CustomHID_ConfigDescriptor */

Function which read the data:

static uint8_t USBD_HID_DataOut (void *pdev, 
uint8_t epnum) 
{ 
if (epnum == HID_OUT_EP) 
{ 
if (((USB_OTG_CORE_HANDLE*)pdev)->dev.out_ep[epnum].xfer_count > 0) 
{ 
/* USB data will be immediately processed, this allow next USB traffic being NAKed till the end of the application Xfer */ 
if (((USB_OTG_CORE_HANDLE*)pdev)->dev.device_status == USB_OTG_CONFIGURED) 
{ 
//USB_OTG_ReadPacket(pdev, NULL, HID_OUT_PACKET); 
USBD_USR_DataOut(Buffer, HID_OUT_PACKET); 
/* Prepare Out endpoint to receive next packet */ 
DCD_EP_PrepareRx(pdev, HID_OUT_EP, Buffer, HID_OUT_PACKET); 
} 
} 
} 
return USBD_OK; 
}

[bkdi]

Posted on December 16, 2012 at 20:32

I figured out, where was an error. I forgot about #define USB_OTG_FS_CORE.

So please give me an answer about initialization of PORTA and PC0 and PD5 pins.

[hfs99]

Posted on December 19, 2012 at 01:03

U6 can be used when the F4Discovery is the USB host supplying VBus for USB. In this case,

when PC0 is driven low 5V will be connected to VBus. The /Fault line at PD5 is normally high but will go low if something on the bus tries to draw more than 500mA, 5V must be provided by an external source. (sorry about the strange formatting - don't know what key I hit and cannot fix it.)