USB that thing 3-use port 2 as the transfer of custom HID

Source: USB That Thing 3-using port 2 as the transfer of custom HID

The USB custom HID example uses port 1 as the communication, so now I use port 2 as the communication end, how to modify it? As shown below:

First modify: USB_DESC.C in the const U8 CUSTOMHID_CONFIGDESCRIPTOR[CUSTOMHID_SIZ_CONFIG_DESC] This character array contents: The following red for the modified part, Not listed without modification:

Usb_endpoint_descriptor_type,/*bDescriptorType:*/     0x82,          /*bendpointaddress:endpoint Address (in)*/     0x03,/*Bmattributes:interrupt Endpoint*/     0x02,/*wmaxpacketsize:2 Bytes Max*/     0x00,     0x20,/*binterval:polling Interval (ms)*/     /* the*/     /*********out endpoint******/      0x07,/*blength:endpoint Descriptor Size*/Usb_endpoint_descriptor_type,/*bDescriptorType:*/     /*Endpoint Descriptor Type*/     0x02, /*bendpointaddress:*/     /*Endpoint Address (out)*/     0x03,/*Bmattributes:interrupt Endpoint*/     0x02,/*wmaxpacketsize:2 Bytes Max*/     0x00,     0x20,/*binterval:polling Interval (ms)*/     /* A*/

Second, modify the Usb_conf.h file as follows:

/*-------------------------------------------------------------*/

#define EP_NUM (3)//This is very important. I've changed it for a long time. This is the number of endpoints supported by the specified device, since the endpoint 2 is used so I use 3, of course >=3

/*-------------------------------------------------------------*/

/*--------------Buffer Description Table-----------------*/

/*-------------------------------------------------------------*/

/* Buffer Table base Address */

/* Buffer Table base Address */

#define BTABLE_ADDRESS (0x00)

maximum number of bytes #define Epxbyte 0x2//Endpoint Transfer

/* EP0 */

/* RX/TX Buffer Base Address */

#define ENDP0_RXADDR (0x18)

#define ENDP0_TXADDR (0x58)

/* EP1 */

/* TX Buffer Base Address */

#define ENDP1_TXADDR (0x100)

#define ENDP1_RXADDR (0x104)

/* EP2 */

#define ENDP2_TXADDR endp1_rxaddr + epxbyte //define receive and send addresses for endpoint 2

#define ENDP2_RXADDR endp2_txaddr + epxbyte

Finally, modify the usb_prop.c as follows:

void Customhid_reset (void) This function adds a reset to port 2 as follows:

Seteptype (ENDP2, ep_interrupt);

Seteptxaddr (ENDP2, endp2_txaddr);

Seteprxaddr (ENDP2, endp2_rxaddr);

Seteptxcount (ENDP2, epxbyte);

Seteprxcount (ENDP2, epxbyte);

Seteprxstatus (ENDP2, ep_rx_valid);

Seteptxstatus (ENDP2, Ep_tx_nak);

The whole is done.

Ps:usb hid example in Keil inside the installation directory examples directory has this example, is based on the example of STM32!

USB that thing 3-use port 2 as custom HID transmission (RPM)