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GigaDevice Semiconductor Inc.

GD32 USBFS&USBHS

Firmware Library User Guide

Application Note

AN050

Summary of Contents for GD32 Series

Page 1: ...GigaDevice Semiconductor Inc GD32 USBFS USBHS Firmware Library User Guide Application Note AN050...

Page 2: ...4 2 Device middle layer driver function 15 5 USBFS Device Library 18 5 1 Device Library Configuration 18 5 1 1 usbd_conf h 18 5 1 2 usb_conf h 18 5 2 Firmware library process 19 5 3 Descriptor 20 5 4...

Page 3: ...uration 50 6 3 Interrupt handling 52 6 4 State Machine Process 56 6 5 USB Host Library User Interface 56 6 6 USB Host Library Device Class Interface 58 6 6 1 HID device class 58 6 6 2 MSC device class...

Page 4: ...5 11 Virtual serial port large data transmitting and receiving 36 Figure 5 12 DFU state machine flow chart 37 Figure 5 13 DFU device class 39 Figure 5 14 All in one connection 40 Figure 5 15 All in o...

Page 5: ...USBFS device interruption 22 Table 5 4 AUDIO relevant descriptors 29 Table 5 5 AUDIO device class interface function 30 Table 5 6 AUDIO device class request 30 Table 5 7 AUDIO user interface function...

Page 6: ...ble 6 2 usb_conf h Configuration description 50 Table 6 3 USBFS host interrupt 52 Table 6 4 USB host library user interface function 57 Table 6 5 HID host class library function 59 Table 6 6 MSC host...

Page 7: ...opment faster This application note is divided into four sections 1 The architecture and files of the library 2 Introduction to the bottom and middle layer driver functions of the library 3 Introducti...

Page 8: ...t modify driver layer which consist of host driver device driver and USB underlying layer As a portion of application layer USB application class file realize specific host or device application class...

Page 9: ...llowing four file folders Figure 2 2 USBFS Firmware Library Folder Device file folder include Protocol layer files and device class files which is required by USB device Figure 2 3 Device folder Drive...

Page 10: ...river folder Host folder include register definition bottom layer driver and USB interrupt handler which is required by USB host Figure 2 5 Host folder The folder ustd include common device class file...

Page 11: ...AN050 GD32 USBFS USBHS Firmware Library User Guide 11 Figure 2 6 Ustd folder...

Page 12: ...usb_core h c file function Table 3 2 usb_core h c file function Function name Functional description usb_core_reset config USB core to soft reset usb_basic_init config USB core basic usb_core_init in...

Page 13: ...vel driver drv_usbd_int h c USB device mode interrupt routines device core usbd_core h c USB device mode core functions usbd_enum h c USB enumeration function usbd_transc h c USB transaction core func...

Page 14: ...ice descriptor from the USB device usbh_cfgdesc_get get configuration descriptor from the USB device usbh_strdesc_get get string descriptor from the USB device usbh_setaddress set the address to the c...

Page 15: ...are a pipe and start a transfer 4 2 Device middle layer driver function Table 4 8 drv_usb_dev h c file function Function name Functional description usb_devcore_init initialize USB core registers for...

Page 16: ...terrupt usbd_int_enumfinish handle USB speed enumeration finish interrupt usbd_int_suspend USB suspend interrupt handler usbd_emptytxfifo_write check FIFO for the next packet to be loaded Table 4 10 u...

Page 17: ...equest _usb_std_setdescriptor handle USB Set_Descriptor request _usb_std_getconfiguration handle USB Get_Configuration request _usb_std_setconfiguration handle USB Set_Configuration request _usb_std_g...

Page 18: ...FG_MAX_NUM 1 define USBD_ITF_MAX_NUM 1 define USBD_HID_INTERFACE 0 USB user string supported define USB_SUPPORT_USER_STRING_DESC define HID_IN_EP EP1_IN define HID_IN_PACKET 8 Each configuration is de...

Page 19: ...SOF output USB_LOW_POWER enable low power mode VBUS_SENSING_ENABLED enable VBUS SENSING USE_HOST_MODE host mode USE_DEVICE_MODE device mode USE_OTG_MODE OTG mode Note 1 If user need to measure the SOF...

Page 20: ...it hid_itfop_register udev dev class_core class_core serial_string_get usb_basic_init usb_core_init usbd_disconnect USB device disconnect USB FIFO endpoint interrupt enable usb_devcore_init USB device...

Page 21: ...ack function static usb_reqsta _std_dev_req usb_core_driver udev usb_req req USB_GET_STATUS _usb_std_getstatus USB_CLEAR_FEATURE _usb_std_clearfeature USB_RESERVED2 _usb_std_reserved USB_SET_FEATURE _...

Page 22: ...DPSC ID pin status change Host or device mode LPMIF 1 LPM interrupt flag Host or device mode ISOONCIF PXNCIF Periodic transfer Not Complete Interrupt flag Isochronous OUT transfer Not Complete Interru...

Page 23: ...ep_num DOEPINTF DOEPINTF_TF if uint8_t USB_USE_DMA udev bp transfer_mode __IO uint32_t eplen udev regs er_out ep_num DOEPLEN udev dev transc_out ep_num xfer_count udev dev transc_out ep_num max_len e...

Page 24: ...f IN endpoint is shown as below static uint32_t usbd_int_epin usb_core_driver udev uint32_t epintnum 0U uint8_t ep_num 0U for epintnum usb_iepintnum_read udev epintnum epintnum 1 ep_num if epintnum 0x...

Page 25: ...8_t data_PID 0U uint32_t bcount 0U __IO uint32_t devrxstat 0U disable the Rx status queue non empty interrupt udev regs gr GINTEN GINTEN_RXFNEIE get the status from the top of the FIFO devrxstat udev...

Page 26: ...enable the Rx status queue level interrupt udev regs gr GINTEN GINTEN_RXFNEIE return 1U In interrupt handler function of Rx FIFO non empty mainly process FIFO data receiving include SETUP transaction...

Page 27: ...ev uint8_t ep_num device data out handler uint8_t SOF usb_dev udev Start of frame handler uint8_t incomplete_isoc_in usb_dev udev Incomplete synchronization IN transfer handler uint8_t incomplete_isoc...

Page 28: ...transfer process of USB data in GD FS library 5 6 1 IN direction In data transfer phase non zero endpoint data of IN direction is processed in usbd_in_transc function In following figure data_in callb...

Page 29: ...ss_core data_out udev ep_num else no operation return uint8_t USBD_OK 5 7 USB device class routine 5 7 1 AUDIO AUDIO device include speaker and micphone interface which could be selected in project co...

Page 30: ...roc audio_req_handler ctlx_out audio_ctlx_out data_in audio_data_in data_out audio_data_out SOF usbd_audio_sof Table 5 5 AUDIO device class interface function Descriptor name Functional description au...

Page 31: ...te_ctl periodic_tc get_state Corresponding function is shown as Table 5 7 AUDIO user interface functions Table 5 7 AUDIO user interface functions Function name Functional description init initialize A...

Page 32: ...ng audio file in host is heared through headphone which is connected to EVAL board Figure 5 6 Audio playback file 2 data IN phase Click the loudspeaker in bottom right corner of desktop and click volu...

Page 33: ...the sound which is transmitted from MCU device to host could be heared by default playing device As shown in Figure 5 8 Audio recording listening configuration Figure 5 8 Audio recording listening co...

Page 34: ...nction descriptor CDC device class interface The CDC device class interface is shown in the following structure whose function implementation is shown in the following Table 5 9 CDC device class inter...

Page 35: ...a transfer uint8_t cdc_acm_check_ready usb_dev udev send CDC ACM data void cdc_acm_data_send usb_dev udev receive CDC ACM data void cdc_acm_data_receive usb_dev udev The functions are shown in the fol...

Page 36: ...al debugging assistant which is shown in Figure 5 11 Virtual serial port large data transmitting and receiving Figure 5 11 Virtual serial port large data transmitting and receiving 5 7 3 DFU DFU is sp...

Page 37: ...rame DFU_DOWNLOAD wLenth 0 bitcanDownload 1 DFU_GETSTATUS Block complete DFU_DOWNLOAD wLenth 0 DFU_GETSTATUS Block in process Status Poll Timeout Status Poll Timeout bitManifestationTolerant 1 Status...

Page 38: ...clude device class request is shown in Table 5 14 DFU device class request Table 5 14 DFU device class request Request name value Functional description DFU_DETACH 0 DFU detach DFU_DNLOAD 1 Download D...

Page 39: ...eration flash_if_write Memory medium write operation flash_if_read Memory medium read operation flash_if_checkaddr Memory medium address legal check FLASH_IF_STRING Interface string DFU Routine operat...

Page 40: ...1 Download Select the target file and configure the corresponding download address after downloading reset the chip and then execute application 2 Upload Select the target file click OK and then pop...

Page 41: ...Figure 5 15 All in one uploading 3 Option Byte operation Double click Edit Option Bytes and then pop out the option byte corresponding information which is shown as Figure 5 16 All in one Option Byte...

Page 42: ...einit req_proc msc_core_req data_in msc_core_in data_out msc_core_out Table 5 16 MSC device class interface functions Function name Functional description msc_core_init Initialize MSC device msc_core_...

Page 43: ...ariable name Functional description STORAGE_Init Memory medium interface initialization STORAGE_IsReady Check whether memory medium is ready STORAGE_IsWriteProtected Check whether memory medium is wri...

Page 44: ...isk firstly which is shown in Figure 5 18 MSC device formatting Figure 5 18 MSC device formatting After formatting is finished write test is operated through copy the test file to disk after copy the...

Page 45: ...tor hid_report_desc report descriptor HID device class interface HID device class interface is shown in below structure and structure function is shown in below Table 5 20 HID device class interface f...

Page 46: ...nctions Function variable name Functional description key_config Key configuration hid_key_data_send Send key value HID routine operation guide Download the HID rountine to EVAL board a newly added HI...

Page 47: ...inter_out Table 5 23 printer device class interface function Function name Functional description printer_init Initialize printer device printer_deinit Deinitialize printer device printer_req Printer...

Page 48: ...ry User Guide 48 function Printer routine operation guide Download the Printer rountine to EVAL board a newly added printer device is visible in device manager As shown in Figure 5 21 printer device c...

Page 49: ...figuration name Functional description USBH_MAX_EP_NUM Maximum number of endpoints USBH_MAX_INTERFACES_NUM Maximum number of interfaces USBH_MAX_ALT_SETTING Maximum number of alternate interfaces USBH...

Page 50: ...ZE Received FIFO size USB_HTX_NPFIFO_FS_SIZE Non periodic transmit FIFO size USB_HTX_PFIFO_FS_SIZE periodic transmit FIFO size USB_ULPI_PHY_ENABLED Enable ULPI PHY USB_EMBEDDED_PHY_ENABLED Enable embe...

Page 51: ...0V 4700pF 5V USB_VBUS USB_DM USB_DP VBUS 1 DM 2 DP 3 ID 4 GND 5 Shield 6 USB_MiniAB receptacle CN3 OTG_FS U5V PA9 PA11 PA12 As shown in Figure 6 1 Construct circuit through triode to control VBUS PD13...

Page 52: ...AVX VBUS_HS_5V PD13 VBUS_FS_5V R96 10K GND R97 10K ENA and ENB active HIGH As shown in Figure 6 2 Control VBUS by Logic Chip Circuit PD13 is configured to be GPIO push pull output mode PP Enable USB...

Page 53: ...in below function static uint32_t usbh_int_rxfifonoempty usb_core_driver udev uint32_t count 0U __IO uint8_t pp_num 0U __IO uint32_t rx_stat 0U disable the RX status queue level interrupt udev regs gr...

Page 54: ...e count 0U rx_stat udev regs gr GRSTATP count break case GRXSTS_PKTSTS_CH_HALTED break default break enable the RX status queue level interrupt udev regs gr GINTEN GINTEN_RXFNEIE return 1U Data transm...

Page 55: ...fer_len len uint16_t txfifostate TFQSTAT_TXFS 4U if len udev host pipe pp_num xfer_len last packet len uint16_t udev host pipe pp_num xfer_len if PIPE_NON_PERIOD pp_mode udev regs gr GINTEN GINTEN_NPT...

Page 56: ...T_ENUM HOST_SET_WAKEUP_FEATURE HOST_CHECK_CLASS HOST_USER_INPUT HOST_ERROR HOST_CLASS_ENUM HOST_CLASS_HANDLER Host start Detect device Detect device speed Standard enumeration Configure wakeup Device...

Page 57: ...on of device resetting usbh_user_device_disconnected user operation of USB disconnection usbh_user_over_current_detected user operation of device overloading usbh_user_device_speed_detected user opera...

Page 58: ...machine struct _usbh_host phost usbh_status class_sof struct _usbh_host uhost void class_data usbh_class The structure initialization is implemented separately by each device class Interface file of e...

Page 59: ...he host pipes used for the HID class usbh_hid_itf_init initialize the hid class usbh_hid_class_req handle HID class requests for HID class usbh_hid_handle manage state machine for HID data transfers u...

Page 60: ...ocess manage the different states of BOT transfer and updates the status to upper layer usbh_msc_bot_abort manages the different error handling for stall usbh_msc_bot_reset reset msc bot request usbh_...

Page 61: ...7 USB Host Library Routine 6 7 1 HID HOST HID host rountine could be used to identify the keyboard and mouse enumeration course and data transfer phase is displayed in display screen Firstly insert ca...

Page 62: ...ID Host Support Mouse Keyboard Display the typed character Move mouse Click button Input character Figure 6 6 Routine for mouse over display of HID host Figure 6 7 Routine for HID host keyboard displa...

Page 63: ...tion could be displayed on the display screen sceondly press TAMPER key U disk root contents could be displayed Then press WAKEUP key write the file to U disk finally the information which indicate MS...

Page 64: ...AN050 GD32 USBFS USBHS Firmware Library User Guide 64 7 Revision history Table 7 1 Revision history Revision No Descriptor Date 1 0 Initial Release Mar 28 2022...

Page 65: ...ed for ordinary business industrial personal and or household applications only The Products are not designed intended or authorized for use as components in systems designed or intended for the opera...

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