Caps lock led turn on/off

Forum|Forum|11 years ago
August 22, 2014
5 replies
2117 views

Posted on August 22, 2014 at 08:53

I want to turn on/off keyboard led using STM32F4 Discovery HID example.. Keys are working fine.I have problem with output Set_report. Led is not turning on/off although it seems i am sending correct request.I am sending following 1 byte control output report each time a key is pressed to turn on caps lock led as follows:

USBH_Set_Report(&USB_OTG_Core_dev , &USB_Host,0x00,0x02,1,(uint8_t *)0x02);

USBH_Status USBH_Set_Report (USB_OTG_CORE_HANDLE *pdev,

USBH_HOST *phost,

uint8_t reportType,

uint8_t reportId,

uint8_t reportLen,

uint8_t* reportBuff)

{

phost->Control.setup.b.bmRequestType = USB_H2D | USB_REQ_RECIPIENT_INTERFACE |\

USB_REQ_TYPE_CLASS;

phost->Control.setup.b.bRequest = USB_HID_SET_REPORT;

phost->Control.setup.b.wValue.w = (reportType << 8 ) | reportId;

phost->Control.setup.b.wIndex.w = 0;

phost->Control.setup.b.wLength.w = reportLen;

return USBH_CtlReq(pdev, phost, reportBuff , reportLen );

}

can anyone tell me,what i am doing wrong here? thanks.

#keyboard #hid #usb

USB

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faddistr

Visitor II

Posted on August 27, 2014 at 19:34

I have same issue. Have you fix it? Version of library isV2.1.0

u8 c=3;
res=USBH_Set_Report(&USB_OTG_Host_Hnd,&USB_Host,0x00,0x00,0x01,&c);
//res allwaysUSBH_BUSY

faddistr

Visitor II

Posted on August 27, 2014 at 19:37

faddistr

Visitor II

Posted on August 28, 2014 at 13:58

I fix my request: USBH_Set_Report(pdev,phost,0x02,0x00,0x01,&c); But result strange - the keyboard begin sending packets with 0 and caps lock turns on regardless of �?.

faddistr

Visitor II

Posted on August 28, 2014 at 16:16

With software usb sniffer i found that computer sends such requests several(6) times. So i just sent several requests in main cycle and all works fine. ^_^ After each request it must be processed with USBH_Process.