STM32F4 HID Host custom device

I'm doing a project like you.I wan't to send and recieve data form my custom HID device.Could you send me a example please.Thank you.
T try to copy your code above but It appears error at BD_Data_Sent_Flag=1;
What is BD_Data_Sent_Flag.
My host HID is STM32F4-Discovery.

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.

Hi Krunal,

> I have analyzer showing "child has an error".

Do you mean a hardware protocol analyzer?
What does "child has an error" exactly mean?
Packet format error (such as CRC, EOP timing or no response)?
Which packet causes the error, OUT, DATA0/1 or ACK?

Tsuneo

Thanks Tsuneo for reply.

I don't know meaning of "child has an error" but it is showing by beagle analyzer for OUT transaction.
Anyway all problems were resolved with 2.1.0 library. Now I am able to transmit data to the device without any problem.

Using 2.0.0 library, ST told me that "you are transmitting data in asynchronous mode instead of synchronous mode". I don't go into the details with this type of configuration but definitely I am interested to understand it in future.

Krunal

Hi Krunal,
Can you help me.
Thank you.

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.

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.

And set HID machine state to HID_SEND_DATA whenever you want to transmit data.

Krunal

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!