Hello,
I am interested to make USB HID HOST which can communicate with custom hid device instead of mice or keyboard.
For that I have to send data to that custom hid device. I have used below fuction for dataout USBH_InterruptSendData (pdev, (unsigned char *)&HID_Machine.buff, HID_Machine.length, HID_Machine.hc_num_out);
I am only doing out transaction form Host(STM32) to device. Everything is perfect and working fine up to 14th frame but 15th frame get corrupted, I have analyzer showing "child has an error". So I am unable to understand the cause of issue, is it memory overflow at host?
If I continue data transmission with new data then host is sending old data packet onwards
I used dual core example for ST and modified USBH_HID_Handle() as below (Only two cases are shown here)
case HID_SEND_DATA:
while(USB_OTG_IsEvenFrame(pdev) == FALSE);
USBH_InterruptSendData (pdev, (unsigned char *)&HID_Machine.buff, HID_Machine.length, HID_Machine.hc_num_out);
HID_Machine.state = HID_BUSY;
HID_Machine.timer = HCD_GetCurrentFrame(pdev);
break;
case HID_BUSY:
if(( HCD_GetCurrentFrame(pdev) - HID_Machine.timer) >= HID_Machine.poll)
{ HID_Machine.state = HID_SEND_DATA; //Retry++; //1 }
else if(HCD_GetURB_State(pdev , HID_Machine.hc_num_out) == URB_DONE) //last transaction was successful or not(USB request Block)
{ HID_Machine.state = HID_GET_DATA;
BD_Data_Sent_Flag=1;
}
else if(HCD_GetURB_State(pdev, HID_Machine.hc_num_out) == URB_STALL )
{
if( (USBH_ClrFeature(pdev, pphost, HID_Machine.ep_addr, HID_Machine.hc_num_out)) == USBH_OK)
HID_Machine.state = HID_SEND_DATA;
} }
Please help...
Hi,
Use STM32_USB-Host-Device_Lib_V2.1.0 because I have found some issue with 2.0.0(Problem while transmitting data to HID device)
Considering you have done BSP configuration.
Do following modification in usbh_hid_core.c for your custom device(other than mice or keyboard)
if(pphost->device_prop.Itf_Desc[0].bInterfaceSubClass == HID_BOOT_CODE || pphost->device_prop.Itf_Desc[0].bInterfaceSubClass == 0x00)//Custom device subclass =0xff { /*Decode Bootclass Protocl: Mouse or Keyboard*/ // if(pphost->device_prop.Itf_Desc[0].bInterfaceProtocol == HID_KEYBRD_BOOT_CODE) // { // HID_Machine.cb = &HID_KEYBRD_cb; // } // else if(pphost->device_prop.Itf_Desc[0].bInterfaceProtocol == HID_MOUSE_BOOT_CODE)
// { // HID_Machine.cb = &HID_MOUSE_cb; // } // else if(pphost->device_prop.Itf_Desc[0].bInterfaceProtocol == 0x00) { HID_Machine.cb = &HID_CUSTOM_cb; // just like mice }
Donot use any variable posted by me because it is just control that I want to handle.Instead use standard library.
Thank you for reply. It appears eror at HID_Machine.cb = &HID_CUSTOM_cb; Where I need to define it. And after that how can I send data to HID device. Here ís my code int main(void) { __IO uint32_t i = 0, count; SystemInit(); USART_Config(); /*!< At this stage the microcontroller clock setting is already configured, this is done through SystemInit() function which is called from startup file (startup_stm32fxxx_xx.s) before to branch to application main. To reconfigure the default setting of SystemInit() function, refer to system_stm32fxxx.c file */
printf(" MCU Start\r\n");
/* Init Host Library */ USBH_Init(&USB_OTG_Core_dev, #ifdef USE_USB_OTG_FS USB_OTG_FS_CORE_ID, #else USB_OTG_HS_CORE_ID, #endif &USB_Host, &HID_cb, &USR_Callbacks);
while (1) { /* Host Task handler */ USBH_Process(&USB_OTG_Core_dev , &USB_Host); } } I modify from STM32_USB-Host-Device_Lib_V2.1.0 My Host HID (STM32-F4 Dícovery) is found HID device.
Could you post your code in this : static USBH_Status USBH_HID_Handle(USB_OTG_CORE_HANDLE *pdev , void *phost) I'm just learnt STM32F4-Discovery for 3 weeks.
Hello Khoa Tran,
I have already posted main part for data transmission in my first message. You have to add this portion in between HID_SYNC and HID_GET_DATA in
static USBH_Status USBH_HID_Handle(USB_OTG_CORE_HANDLE *pdev , void *phost)
Copy your data into the (that you want to transmit to the device) HID_Machine.buff and provide length of data in HID_Machine.length.
for your question, HID_CUSTOM_cb giving error
use this HID_cb_TypeDef HID_CUSTOM_cb= { Device_Init, Device_Decode, };
static void Device_Init ( void) { // Add your code here }
static void Device_Decode(uint8_t *data) { // Add your code here }
Krunal
Thank you Krunal. In main.c we just call USBH_Process(&USB_OTG_Core_dev , &USB_Host); and it will transfer data to HID Device. I want to know what data my Host is transfer.How can I do it?
Thank you Krunal. My Host can recieve data from my custom HID Device but I still don't know how to send data from host to device.
Dear Tran,
I hope you have implemented whatever I suggested previously.
Just implement below logic.
And set HID machine state to HID_SEND_DATA whenever you want to transmit data.
Set HID_Machine.state = HID_SEND_DATA; in main.c ? I want to my host send data when I push a button. I set in main.c and It give a error "use of undeclared identifier 'HID_Machine'" but If I define
#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED #if defined ( __ICCARM__ ) /*!< IAR Compiler */ #pragma data_alignment=4 #endif #endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */ __ALIGN_BEGIN HID_Machine_TypeDef HID_Machine __ALIGN_END ;
It give a error "HID_Machine mutiply defined (by usbh_hid_core.o and main.o)" p/s : I included usbh_hid_core.h in main.c Thank you.
Hi Krunal, Thank you for helping me. I can transfer and recieve data from my custom HID Device now. Khoa.
You are welcome and congratulation!!
Hi Khor, Now I used STM32F4 HID Host custom device,the logic is when I pressed button ,HOST send data to HID decive ,can you tell me the send logic in USBH_HID_Handle?
Thanks!