//! This function manages the HID Get_Descriptor request. //! static void hid_get_descriptor(U8 size_of_report, const U8* p_usb_hid_report) { bool zlp; U16 wIndex; U16 wLength; zlp = false; /* no zero length packet */ data_to_transfer = size_of_report; pbuffer = p_usb_hid_report; wIndex = Usb_read_endpoint_data(EP_CONTROL, 16); wIndex = usb_format_usb_to_mcu_data(16, wIndex); wLength = Usb_read_endpoint_data(EP_CONTROL, 16); wLength = usb_format_usb_to_mcu_data(16, wLength); Usb_ack_setup_received_free(); //!< clear the setup received flag if (wLength > data_to_transfer) { zlp = !(data_to_transfer % EP_CONTROL_LENGTH); //!< zero length packet condition } else { data_to_transfer = wLength; //!< send only requested number of data bytes } Usb_ack_nak_out(EP_CONTROL); while (data_to_transfer && (!Is_usb_nak_out(EP_CONTROL))) { while( !Is_usb_control_in_ready() && !Is_usb_nak_out(EP_CONTROL) ); if( Is_usb_nak_out(EP_CONTROL) ) break; // don't clear the flag now, it will be cleared after Usb_reset_endpoint_fifo_access(EP_CONTROL); data_to_transfer = usb_write_ep_txpacket(EP_CONTROL, pbuffer, data_to_transfer, &pbuffer); if( Is_usb_nak_out(EP_CONTROL) ) break; else Usb_ack_control_in_ready_send(); //!< Send data until necessary } if ( zlp && (!Is_usb_nak_out(EP_CONTROL)) ) { while (!Is_usb_control_in_ready()); Usb_ack_control_in_ready_send(); } while (!(Is_usb_nak_out(EP_CONTROL))); Usb_ack_nak_out(EP_CONTROL); while (!Is_usb_control_out_received()); Usb_ack_control_out_received_free(); }
//! This function manages the GET DESCRIPTOR request. The device descriptor, //! the configuration descriptor and the device qualifier are supported. All //! other descriptors must be supported by the usb_user_get_descriptor //! function. //! Only 1 configuration is supported. //! void usb_get_descriptor(void) { bool zlp; U16 wLength; U8 descriptor_type; U8 string_type; Union32 temp; #if (USB_HIGH_SPEED_SUPPORT==true) bool b_first_data = true; #endif zlp = false; /* no zero length packet */ string_type = Usb_read_endpoint_data(EP_CONTROL, 8); /* read LSB of wValue */ descriptor_type = Usb_read_endpoint_data(EP_CONTROL, 8); /* read MSB of wValue */ switch (descriptor_type) { case DEVICE_DESCRIPTOR: data_to_transfer = Usb_get_dev_desc_length(); //!< sizeof(usb_dev_desc); pbuffer = Usb_get_dev_desc_pointer(); break; #if (USB_HIGH_SPEED_SUPPORT==false) case CONFIGURATION_DESCRIPTOR: data_to_transfer = Usb_get_conf_desc_length(); //!< sizeof(usb_conf_desc); pbuffer = Usb_get_conf_desc_pointer(); break; #else case CONFIGURATION_DESCRIPTOR: if( Is_usb_full_speed_mode() ) { data_to_transfer = Usb_get_conf_desc_fs_length(); //!< sizeof(usb_conf_desc_fs); pbuffer = Usb_get_conf_desc_fs_pointer(); }else{ data_to_transfer = Usb_get_conf_desc_hs_length(); //!< sizeof(usb_conf_desc_hs); pbuffer = Usb_get_conf_desc_hs_pointer(); } break; case OTHER_SPEED_CONFIGURATION_DESCRIPTOR: if( !Is_usb_full_speed_mode() ) { data_to_transfer = Usb_get_conf_desc_fs_length(); //!< sizeof(usb_conf_desc_fs); pbuffer = Usb_get_conf_desc_fs_pointer(); }else{ data_to_transfer = Usb_get_conf_desc_hs_length(); //!< sizeof(usb_conf_desc_hs); pbuffer = Usb_get_conf_desc_hs_pointer(); } break; case DEVICE_QUALIFIER_DESCRIPTOR: data_to_transfer = Usb_get_qualifier_desc_length(); //!< sizeof(usb_qualifier_desc); pbuffer = Usb_get_qualifier_desc_pointer(); break; #endif default: if (!usb_user_get_descriptor(descriptor_type, string_type)) { Usb_enable_stall_handshake(EP_CONTROL); Usb_ack_setup_received_free(); return; } break; } temp.u32 = Usb_read_endpoint_data(EP_CONTROL, 32); //!< read wIndex and wLength with a 32-bit access //!< since this access is aligned with a 32-bit //!< boundary from the beginning of the endpoint wLength = usb_format_usb_to_mcu_data(16, temp.u16[1]); //!< ignore wIndex, keep and format wLength Usb_ack_setup_received_free(); //!< clear the setup received flag if (wLength > data_to_transfer) { zlp = !(data_to_transfer % EP_CONTROL_LENGTH); //!< zero length packet condition } else { // No need to test ZLP sending since we send the exact number of bytes as // expected by the host. data_to_transfer = wLength; //!< send only requested number of data bytes } Usb_ack_nak_out(EP_CONTROL); while (data_to_transfer && !Is_usb_nak_out(EP_CONTROL)) { while (!Is_usb_control_in_ready() && !Is_usb_nak_out(EP_CONTROL)); if (Is_usb_nak_out(EP_CONTROL)) break; // don't clear the flag now, it will be cleared after Usb_reset_endpoint_fifo_access(EP_CONTROL); #if (USB_HIGH_SPEED_SUPPORT==true) // To support other descriptors like OTHER_SPEED_CONFIGURATION_DESCRIPTOR if( b_first_data ) { b_first_data = false; if( 0!= data_to_transfer ) { usb_write_ep_txpacket(EP_CONTROL, pbuffer, 1, &pbuffer); data_to_transfer--; } if( 0!= data_to_transfer ) { usb_write_ep_txpacket(EP_CONTROL, &descriptor_type, 1, NULL); pbuffer = ((const U8*)pbuffer)+1; data_to_transfer--; } } #endif if( 0!= data_to_transfer ) { data_to_transfer = usb_write_ep_txpacket(EP_CONTROL, pbuffer, data_to_transfer, &pbuffer); } if (Is_usb_nak_out(EP_CONTROL)) break; Usb_ack_control_in_ready_send(); //!< Send data until necessary } if (zlp && !Is_usb_nak_out(EP_CONTROL)) { while (!Is_usb_control_in_ready()); Usb_ack_control_in_ready_send(); } while (!Is_usb_nak_out(EP_CONTROL)); Usb_ack_nak_out(EP_CONTROL); while (!Is_usb_control_out_received()); Usb_ack_control_out_received_free(); }
//! This function manages the GET DESCRIPTOR request. The device descriptor, //! the configuration descriptor and the device qualifier are supported. All //! other descriptors must be supported by the usb_user_get_descriptor //! function. //! Only 1 configuration is supported. //! void usb_get_descriptor(void) { Bool zlp; U16 wLength; U8 descriptor_type; U8 string_type; Union32 temp; zlp = FALSE; /* no zero length packet */ string_type = Usb_read_endpoint_data(EP_CONTROL, 8); /* read LSB of wValue */ descriptor_type = Usb_read_endpoint_data(EP_CONTROL, 8); /* read MSB of wValue */ switch (descriptor_type) { case DEVICE_DESCRIPTOR: data_to_transfer = Usb_get_dev_desc_length(); //!< sizeof(usb_dev_desc); pbuffer = Usb_get_dev_desc_pointer(); break; case CONFIGURATION_DESCRIPTOR: data_to_transfer = Usb_get_conf_desc_length(); //!< sizeof(usb_conf_desc); pbuffer = Usb_get_conf_desc_pointer(); break; default: if (!usb_user_get_descriptor(descriptor_type, string_type)) { Usb_enable_stall_handshake(EP_CONTROL); Usb_ack_setup_received_free(); return; } break; } temp.u32 = Usb_read_endpoint_data(EP_CONTROL, 32); //!< read wIndex and wLength with a 32-bit access //!< since this access is aligned with a 32-bit //!< boundary from the beginning of the endpoint wLength = usb_format_usb_to_mcu_data(16, temp.u16[1]); //!< ignore wIndex, keep and format wLength Usb_ack_setup_received_free(); //!< clear the setup received flag if (wLength > data_to_transfer) { zlp = !(data_to_transfer % EP_CONTROL_LENGTH); //!< zero length packet condition } else { // No need to test ZLP sending since we send the exact number of bytes as // expected by the host. data_to_transfer = (U8)wLength; //!< send only requested number of data bytes } Usb_ack_nak_out(EP_CONTROL); while (data_to_transfer && !Is_usb_nak_out(EP_CONTROL)) { while (!Is_usb_control_in_ready() && !Is_usb_nak_out(EP_CONTROL)); if (Is_usb_nak_out(EP_CONTROL)) break; // don't clear the flag now, it will be cleared after Usb_reset_endpoint_fifo_access(EP_CONTROL); data_to_transfer = usb_write_ep_txpacket(EP_CONTROL, pbuffer, data_to_transfer, &pbuffer); if (Is_usb_nak_out(EP_CONTROL)) break; else Usb_ack_control_in_ready_send(); //!< Send data until necessary } if (zlp && !Is_usb_nak_out(EP_CONTROL)) { while (!Is_usb_control_in_ready()); Usb_ack_control_in_ready_send(); } while (!Is_usb_nak_out(EP_CONTROL)); Usb_ack_nak_out(EP_CONTROL); while (!Is_usb_control_out_received()); Usb_ack_control_out_received_free(); }