519 lines
18 KiB
C
519 lines
18 KiB
C
#include STM32_HAL_H
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#include "usbd_core.h"
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#include "usbd_desc.h"
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#define USBD_MAX_NUM_INTERFACES (3)
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#define USB_MAX_CONFIG_DESC_SIZE (128)
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#define USB_MAX_STR_DESC_SIZE (256)
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#define USB_DESC_TYPE_HID (0x21)
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#define USB_DESC_TYPE_REPORT (0x22)
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extern PCD_HandleTypeDef pcd_fs_handle;
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static USBD_HandleTypeDef usb_dev_handle;
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static usb_device_descriptor_t usb_dev_desc;
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static uint8_t usb_config_buf[USB_MAX_CONFIG_DESC_SIZE];
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static uint8_t usb_str_buf[USB_MAX_STR_DESC_SIZE];
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static const usb_string_descriptor_t usb_langid_str_desc = {
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.bLength = USB_LEN_LANGID_STR_DESC,
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.bDescriptorType = USB_DESC_TYPE_STRING,
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.wData = USB_LANGID_ENGLISH_US,
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};
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static usb_config_descriptor_t *usb_config_desc = (usb_config_descriptor_t *)(usb_config_buf);
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static usb_interface_descriptor_t *usb_next_iface_desc;
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static usb_string_table_t usb_str_table;
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static usb_iface_t usb_ifaces[USBD_MAX_NUM_INTERFACES];
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int usb_init(const usb_dev_info_t *dev_info) {
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// Device descriptor
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usb_dev_desc.bLength = USB_LEN_DEV_DESC;
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usb_dev_desc.bDescriptorType = USB_DESC_TYPE_DEVICE;
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usb_dev_desc.bcdUSB = 0x00ef;
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usb_dev_desc.bDeviceClass = 0xef; // Composite Device Class
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usb_dev_desc.bDeviceSubClass = 0x02; // Common Class
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usb_dev_desc.bDeviceProtocol = 0x01; // Interface Association Descriptor
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usb_dev_desc.bMaxPacketSize = USB_MAX_EP0_SIZE;
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usb_dev_desc.idVendor = dev_info->vendor_id;
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usb_dev_desc.idProduct = dev_info->product_id;
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usb_dev_desc.bcdDevice = dev_info->release_num;
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usb_dev_desc.iManufacturer = USBD_IDX_MFC_STR; // Index of manufacturer string
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usb_dev_desc.iProduct = USBD_IDX_PRODUCT_STR; // Index of product string
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usb_dev_desc.iSerialNumber = USBD_IDX_SERIAL_STR; // Index of serial number string
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usb_dev_desc.bNumConfigurations = 0x01;
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// Configuration descriptor
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usb_config_desc->bLength = USB_LEN_CFG_DESC;
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usb_config_desc->bDescriptorType = USB_DESC_TYPE_CONFIGURATION;
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usb_config_desc->wTotalLength = USB_LEN_CFG_DESC;
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usb_config_desc->bNumInterfaces = 0x00;
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usb_config_desc->bConfigurationValue = 0x01; // Configuration value
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usb_config_desc->iConfiguration = 0x00; // Index of string descriptor describing the configuration
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usb_config_desc->bmAttributes = 0x80; // 0x80 = bus powered; 0xc0 = self powered
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usb_config_desc->bMaxPower = 0xfa; // In units of 2mA
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// Pointer to interface descriptor data, see: usb_desc_alloc_iface, usb_desc_add_iface
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usb_next_iface_desc = (usb_interface_descriptor_t *)(usb_config_buf + usb_config_desc->wTotalLength);
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// Reset the iface state map
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usb_iface_list = {};
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// String table
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usb_str_table->manufacturer_str = dev_info->manufacturer_str;
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usb_str_table->product_str = dev_info->product_str;
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usb_str_table->serial_str = dev_info->serial_number_str;
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usb_str_table->config_str = dev_info->configuration_str;
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usb_str_table->interface_str = dev_info->interface_str;
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USBD_Init(&usb_dev_handle, (USBD_DescriptorsTypeDef*)&usb_descriptors, 0); // 0 == full speed
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USBD_RegisterClass(&usb_dev_handle, &usb_class);
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return 0;
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}
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int usb_start(void) {
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return USBD_Start(&usb_dev_handle);
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}
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int usb_stop(void) {
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return USBD_Stop(&usb_dev_handle);
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}
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static uint8_t *usb_get_dev_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
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*length = sizeof(usb_dev_desc);
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return (uint8_t *)usb_dev_desc;
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}
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static uint8_t *usb_get_langid_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
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*length = sizeof(usb_langid_str_desc);
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return (uint8_t *)usb_langid_str_desc;
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}
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static uint8_t *usb_get_manufacturer_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
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USBD_GetString(usb_str_table.manufacturer_str, usb_str_buf, length);
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return usb_str_buf;
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}
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static uint8_t *usb_get_product_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
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USBD_GetString(usb_str_table.product_str, usb_str_buf, length);
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return usb_str_buf;
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}
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static uint8_t *usb_get_serial_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
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USBD_GetString(usb_str_table.serial_str, usb_str_buf, length);
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return usb_str_buf;
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}
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static uint8_t *usb_get_config_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
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USBD_GetString(usb_str_table.config_str, usb_str_buf, length);
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return usb_str_buf;
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}
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static uint8_t *usb_get_interface_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
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USBD_GetString(usb_str_table.interface_str, usb_str_buf, length);
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return usb_str_buf;
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}
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static const USBD_DescriptorsTypeDef usb_descriptors = {
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.GetDeviceDescriptor = usb_get_dev_descriptor,
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.GetLangIDStrDescriptor = usb_get_langid_str_descriptor,
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.GetManufacturerStrDescriptor = usb_get_manufacturer_str_descriptor,
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.GetProductStrDescriptor = usb_get_product_str_descriptor,
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.GetSerialStrDescriptor = usb_get_serial_str_descriptor,
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.GetConfigurationStrDescriptor = usb_get_config_str_descriptor,
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.GetInterfaceStrDescriptor = usb_get_interface_str_descriptor,
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};
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static void *usb_desc_alloc_iface(size_t desc_len) {
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if (usb_config_desc->wTotalLength + desc_len > USB_MAX_CONFIG_DESC_SIZE) {
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return NULL; // Not enough space in the descriptor
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}
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if (usb_config_desc->bNumInterfaces + 1 >= USBD_MAX_NUM_INTERFACES)
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return NULL; // Already using all the interfaces
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}
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return usb_next_iface_desc;
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}
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static void usb_desc_add_iface(size_t desc_len) {
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usb_config_desc->bNumInterfaces++;
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usb_config_desc->wTotalLength += desc_len;
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usb_next_iface_desc = (usb_interface_descriptor_t *)(usb_config_buf + usb_config_desc->wTotalLength);
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}
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/* usb_hid_add adds and configures new USB HID interface according to
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* configuration options passed in `info`. */
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int usb_hid_add(const usb_hid_info_t *info) {
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usb_hid_descriptor_block_t *d = usb_desc_alloc_iface(sizeof(*d));
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if (!d) {
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return 1; // Not enough space in the configuration descriptor
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}
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if ((info->iface_num < usb_config_desc->bNumInterfaces)
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(info->iface_num >= USBD_MAX_NUM_INTERFACES) ||
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((info->ep_in & 0x80) == 0) ||
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((info->ep_out & 0x80) != 0)) {
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return 1; // Invalid configuration values
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}
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// Interface descriptor
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d->iface.bLength = USB_LEN_IF_DESC;
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d->iface.bDescriptorType = USB_DESC_TYPE_INTERFACE;
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d->iface.bInterfaceNumber = info->iface_num;
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d->iface.bAlternateSetting = 0x00;
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d->iface.bNumEndpoints = 0x02;
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d->iface.bInterfaceClass = 0x03; // HID Class
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d->iface.bInterfaceSubClass = info->subclass;
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d->iface.nInterfaceProtocol = info->protocol;
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d->iface.iInterface = 0x00; // Index of string descriptor describing the interface
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// HID descriptor
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d->hid.bLength = sizeof(usb_hid_descriptor_t);
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d->hid.bDescriptorType = USB_DESC_TYPE_HID;
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d->hid.bcdHID = 0x1101; // HID Class Spec release number
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d->hid.bCountryCode = 0x00; // Hardware target country
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d->hid.bNumDescriptors = 0x01; // Number of HID class descriptors to follow
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d->hid.bReportDescriptorType = USB_DESC_TYPE_REPORT;
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d->hid.wReportDescriptorLength = info->report_desc_len;
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// IN endpoint (sending)
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d->ep_in.bLength = USB_LEN_EP_DESC;
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d->ep_in.bDescriptorType = USB_DESC_TYPE_ENDPOINT;
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d->ep_in.bEndpointAddress = info->ep_in;
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d->ep_in.bmAttributes = USBD_EP_TYPE_INTR;
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d->ep_in.wMaxPacketSize = info->max_packet_len;
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d->ep_in.bInterval = info->polling_interval;
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// OUT endpoint (receiving)
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d->ep_out.bLength = USB_LEN_EP_DESC;
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d->ep_out.bDescriptorType = USB_DESC_TYPE_ENDPOINT;
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d->ep_out.bEndpointAddress = info->ep_out;
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d->ep_out.bmAttributes = USBD_EP_TYPE_INTR;
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d->ep_out.wMaxPacketSize = info->max_packet_len;
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d->ep_out.bInterval = info->polling_interval;
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// Config descriptor
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usb_desc_add_iface(sizeof(*d));
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// Interface state
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usb_iface_t *i = &usb_ifaces[info->iface_num];
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i->hid.ep_in = info->ep_in;
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i->hid.ep_out = info->ep_out;
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i->hid.rx_buffer = info->hid_buffer;
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i->hid.max_packet_len = info->max_packet_len;
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i->hid.report_desc_len = info->report_desc_len;
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i->hid.report_desc = info->report_desc;
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i->hid.desc_block = d;
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}
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int usb_hid_can_read(uint8_t iface_num) {
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return ((iface_num < USBD_MAX_NUM_INTERFACES) &&
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(usb_ifaces[iface_num].type == USB_IFACE_TYPE_HID) &&
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(usb_ifaces[iface_num].hid.rx_buffer_len > 0) &&
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usb_dev_handle.dev_state == USBD_STATE_CONFIGURED);
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}
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int usb_hid_can_write(uint8_t iface_num) {
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return ((iface_num < USBD_MAX_NUM_INTERFACES) &&
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(usb_ifaces[iface_num].type == USB_IFACE_TYPE_HID) &&
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(usb_ifaces[iface_num].hid.is_idle) &&
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usb_dev_handle.dev_state == USBD_STATE_CONFIGURED);
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}
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int usb_hid_read(uint8_t iface_num, uint8_t *buf, uint32_t len) {
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if (iface_num >= USBD_MAX_NUM_INTERFACES) {
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return -1; // Invalid interface number
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}
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if (usb_ifaces[iface_num].type != USB_IFACE_TYPE_HID) {
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return -1; // Invalid interface number
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}
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usb_hid_state_t *state = &usb_ifaces[iface_num].hid;
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if (len < state->rx_buffer_len) {
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return 0; // Not enough data in the read buffer
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}
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memcpy(buf, state->rx_buffer, state->rx_buffer_len);
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// Clear NAK to indicate we are ready to read more data
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usb_ep_clear_nak(&usb_dev_handle, state->ep_out);
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return state->rx_buffer_len;
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}
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int usb_hid_write(uint8_t iface_num, const uint8_t *buf, uint32_t len) {
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if (iface_num >= USBD_MAX_NUM_INTERFACES) {
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return -1; // Invalid interface number
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}
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if (usb_ifaces[iface_num].type != USB_IFACE_TYPE_HID) {
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return -1; // Invalid interface number
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}
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usb_hid_state_t *state = &usb_ifaces[iface_num].hid;
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state->in_idle = 0;
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USBD_LL_Transmit(&usb_dev_handle, state->ep_in, (uint8_t *)buf, (uint16_t)len);
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}
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static int usb_hid_class_init(USBD_HandleTypeDef *dev, usb_hid_state_t *state, uint8_t cfg_idx) {
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// Open endpoints
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USBD_LL_OpenEP(dev, state->ep_in, USBD_EP_TYPE_INTR, state->max_packet_len);
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USBD_LL_OpenEP(dev, state->ep_out, USBD_EP_TYPE_INTR, state->max_packet_len);
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// Reset the state
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state->in_idle = 1;
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state->protocol = 0;
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state->idle_state = 0;
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state->alt_setting = 0;
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// Prepare Out endpoint to receive next packet
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USBD_LL_PrepareReceive(dev, hid_out_ep, state->rx_buffer, state->max_packet_len);
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}
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static int usb_hid_class_deinit(USBD_HandleTypeDef *dev, usb_hid_state_t *state, uint8_t cfg_idx) {
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// Close endpoints
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USBD_LL_CloseEP(dev, state->ep_in);
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USBD_LL_CloseEP(dev, state->ep_out);
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}
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static int usb_hid_class_setup(USBD_HandleTypeDef *dev, usb_hid_state_t *state, USBD_SetupReqTypedef *req) {
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switch (req->bmRequest & USB_REQ_TYPE_MASK) {
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// Class request
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case USB_REQ_TYPE_CLASS:
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switch (req->bRequest) {
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case HID_REQ_SET_PROTOCOL:
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state->protocol = req->wValue;
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break;
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case HID_REQ_GET_PROTOCOL:
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USBD_CtlSendData(dev, &state->protocol, sizeof(state->protocol));
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break;
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case HID_REQ_SET_IDLE:
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state->idle_rate = req->wValue >> 8;
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break;
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case HID_REQ_GET_IDLE:
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USBD_CtlSendData(dev, &state->idle_rate, sizeof(state->idle_rate));
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break;
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default:
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USBD_CtlError(dev, req);
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return USBD_FAIL;
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}
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break;
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// Interface & Endpoint request
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case USB_REQ_TYPE_STANDARD:
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switch (req->bRequest) {
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case USB_REQ_SET_INTERFACE:
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state->alt_setting = req->wValue;
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break;
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case USB_REQ_GET_INTERFACE:
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USBD_CtlSendData(dev, &state->alt_setting, sizeof(state->alt_setting));
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break;
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case USB_REQ_GET_DESCRIPTOR:
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switch (req->wValue >> 8) {
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case USB_DESC_TYPE_HID:
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USBD_CtlSendData(dev, (uint8_t*)&state->desc_block->hid, MIN(req->wLength, sizeof(state->desc_block->hid)));
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break;
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case USB_DESC_TYPE_REPORT:
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USBD_CtlSendData(dev, state->report_desc, MIN(req->wLength, state->report_desc_len));
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break;
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}
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break;
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}
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break;
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}
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return USBD_OK;
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}
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static uint8_t usb_hid_class_data_in(USBD_HandleTypeDef *dev, usb_hid_state_t *state, uint8_t ep_num) {
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if (ep_num == state->ep_in) {
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// Ensure that the FIFO is empty before a new transfer,
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// this condition could be caused by a new transfer
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// before the end of the previous transfer.
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state->in_idle = 1;
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}
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}
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static uint8_t usb_hid_class_data_out(USBD_HandleTypeDef *dev, usb_hid_state_t *state, uint8_t ep_num) {
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if (ep_num == state->ep_out) {
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// User should provide state->rx_buffer_len that is big
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// enough for state->max_packet_len bytes.
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state->rx_buffer_len = USBD_LL_GetRxDataSize(dev, ep_num);
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if (state->rx_buffer_len > 0) {
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// Block the OUT EP until we process received data
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usb_ep_set_nak(dev, ep_num);
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}
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}
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}
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static uint8_t usb_class_init(USBD_HandleTypeDef *dev, uint8_t cfg_idx) {
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for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
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switch (usb_ifaces[i].type) {
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case USB_IFACE_TYPE_HID:
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usb_hid_class_init(dev, &usb_ifaces[i].hid, cfg_idx);
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break;
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}
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}
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return USBD_OK;
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}
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static uint8_t usb_class_deinit(USBD_HandleTypeDef *dev, uint8_t cfg_idx) {
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for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
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switch (usb_ifaces[i].type) {
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case USB_IFACE_TYPE_HID:
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usb_hid_class_deinit(dev, &usb_ifaces[i].hid, cfg_idx);
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break;
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}
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}
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return USBD_OK;
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}
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static uint8_t usb_class_setup(USBD_HandleTypeDef *dev, USBD_SetupReqTypedef *req) {
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if (((req->bmRequest & USB_REQ_TYPE_MASK) != USB_REQ_TYPE_CLASS) &&
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((req->bmRequest & USB_REQ_TYPE_MASK) != USB_REQ_TYPE_STANDARD)) {
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return USBD_OK;
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}
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if (req->wIndex >= USBD_MAX_NUM_INTERFACES) {
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return USBD_FAIL;
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}
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switch (usb_ifaces[req->wIndex].type) {
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case USB_IFACE_TYPE_HID:
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return usb_hid_class_setup(dev, &usb_ifaces[req->wIndex].hid, req);
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default:
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return USBD_FAIL;
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}
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}
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static uint8_t usb_class_ep0_rx_ready(USBD_HandleTypeDef *dev) {
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return USBD_OK;
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}
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static uint8_t usb_class_data_in(USBD_HandleTypeDef *pdev, uint8_t ep_num) {
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for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
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switch (usb_ifaces[i].type) {
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case USB_IFACE_TYPE_HID:
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usb_hid_class_data_in(dev, &usb_ifaces[i].hid, ep_num);
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break;
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}
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}
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return USBD_OK;
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}
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static uint8_t usb_class_data_out(USBD_HandleTypeDef *dev, uint8_t ep_num) {
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for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
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switch (usb_ifaces[i].type) {
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case USB_IFACE_TYPE_HID:
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usb_hid_class_data_out(dev, &usb_ifaces[i].hid, ep_num);
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break;
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}
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}
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return USBD_OK;
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}
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static uint8_t *usb_class_get_cfg_desc(uint16_t *length) {
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*length = usb_config_desc->wTotalLength;
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return usb_config_buf;
|
|
}
|
|
|
|
static const USBD_ClassTypeDef usb_class = {
|
|
.Init = usb_class_init,
|
|
.DeInit = usb_class_deinit,
|
|
.Setup = usb_class_setup,
|
|
.EP0_TxSent = NULL,
|
|
.EP0_RxReady = usb_class_ep0_rx_ready,
|
|
.DataIn = usb_class_data_in,
|
|
.DataOut = usb_class_data_out,
|
|
.SOF = NULL,
|
|
.IsoINIncomplete = NULL,
|
|
.IsoOUTIncomplete = NULL,
|
|
.GetHSConfigDescriptor = usb_class_get_cfg_desc,
|
|
.GetFSConfigDescriptor = usb_class_get_cfg_desc,
|
|
.GetOtherSpeedConfigDescriptor = usb_class_get_cfg_desc,
|
|
.GetDeviceQualifierDescriptor = NULL,
|
|
};
|
|
|
|
static uint8_t usb_ep_set_nak(USBD_HandleTypeDef *dev, uint8_t ep_num) {
|
|
PCD_HandleTypeDef *hpcd = dev->pData;
|
|
USB_OTG_GlobalTypeDef *USBx = hpcd->Instance;
|
|
USBx_OUTEP(ep_num)->DOEPCTL |= USB_OTG_DOEPCTL_SNAK;
|
|
return USBD_OK;
|
|
}
|
|
|
|
static uint8_t usb_ep_clear_nak(USBD_HandleTypeDef *dev, uint8_t ep_num) {
|
|
PCD_HandleTypeDef *hpcd = dev->pData;
|
|
USB_OTG_GlobalTypeDef *USBx = hpcd->Instance;
|
|
USBx_OUTEP(ep_num)->DOEPCTL |= USB_OTG_DOEPCTL_CNAK;
|
|
return USBD_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief This function handles USB-On-The-Go FS global interrupt request.
|
|
* @param None
|
|
* @retval None
|
|
*/
|
|
void OTG_FS_IRQHandler(void) {
|
|
HAL_PCD_IRQHandler(&pcd_fs_handle);
|
|
}
|
|
|
|
/**
|
|
* @brief This function handles USB OTG Common FS/HS Wakeup functions.
|
|
* @param *pcd_handle for FS or HS
|
|
* @retval None
|
|
*/
|
|
static void OTG_CMD_WKUP_Handler(PCD_HandleTypeDef *pcd_handle) {
|
|
if (!(pcd_handle->Init.low_power_enable)) {
|
|
return;
|
|
}
|
|
|
|
/* Reset SLEEPDEEP bit of Cortex System Control Register */
|
|
SCB->SCR &= (uint32_t) ~((uint32_t)(SCB_SCR_SLEEPDEEP_Msk | SCB_SCR_SLEEPONEXIT_Msk));
|
|
|
|
/* Configures system clock after wake-up from STOP: enable HSE, PLL and select
|
|
PLL as system clock source (HSE and PLL are disabled in STOP mode) */
|
|
|
|
__HAL_RCC_HSE_CONFIG(RCC_HSE_ON);
|
|
|
|
/* Wait till HSE is ready */
|
|
while (__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) == RESET) {}
|
|
|
|
/* Enable the main PLL. */
|
|
__HAL_RCC_PLL_ENABLE();
|
|
|
|
/* Wait till PLL is ready */
|
|
while (__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) == RESET) {}
|
|
|
|
/* Select PLL as SYSCLK */
|
|
MODIFY_REG(RCC->CFGR, RCC_CFGR_SW, RCC_SYSCLKSOURCE_PLLCLK);
|
|
|
|
while (__HAL_RCC_GET_SYSCLK_SOURCE() != RCC_CFGR_SWS_PLL) {}
|
|
|
|
/* ungate PHY clock */
|
|
__HAL_PCD_UNGATE_PHYCLOCK(pcd_handle);
|
|
}
|
|
|
|
/**
|
|
* @brief This function handles USB OTG FS Wakeup IRQ Handler.
|
|
* @param None
|
|
* @retval None
|
|
*/
|
|
void OTG_FS_WKUP_IRQHandler(void) {
|
|
OTG_CMD_WKUP_Handler(&pcd_fs_handle);
|
|
|
|
/* Clear EXTI pending Bit*/
|
|
__HAL_USB_FS_EXTI_CLEAR_FLAG();
|
|
}
|