CherryUSB框架

USB CDC 功能实现

USB HID 功能实现

如果HID设备能正常枚举，但是无法打开设备进行通信，请检查HID报告描述符! 下边例子会在WIN10的电脑上枚举出一个<符合HID标准的条形码标记读取器>

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#include "main.h"
#include "usbd_core.h"
#include "usbd_hid.h"

/*!< hidraw in endpoint */
#define HIDRAW_IN_EP 0x81
#define HIDRAW_IN_EP_SIZE 64
#define HIDRAW_IN_INTERVAL 10

/*!< hidraw out endpoint */
#define HIDRAW_OUT_EP 0x02
#define HIDRAW_OUT_EP_SIZE 64
#define HIDRAW_OUT_EP_INTERVAL 10

#define USBD_VID 0x0480
#define USBD_PID 0x5850
#define USBD_MAX_POWER 100
#define USBD_LANGID_STRING 1033

/*!< config descriptor size */
#define USB_HID_CONFIG_DESC_SIZ (9 + 9 + 9 + 7 + 7)

/*!< custom hid report descriptor size */
#define HID_CUSTOM_REPORT_DESC_SIZE 33

/*!< global descriptor */
static const uint8_t hid_descriptor[] = {USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0x00, 0x00, 0x00, USBD_VID, USBD_PID, 0x0002, 0x01),
                                         USB_CONFIG_DESCRIPTOR_INIT(USB_HID_CONFIG_DESC_SIZ, 0x01, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER),
                                         /************** Descriptor of Custom interface *****************/
                                         0x09,                          /* bLength: Interface Descriptor size */
                                         USB_DESCRIPTOR_TYPE_INTERFACE, /* bDescriptorType: Interface descriptor type */
                                         0x00,                          /* bInterfaceNumber: Number of Interface */
                                         0x00,                          /* bAlternateSetting: Alternate setting */
                                         0x02,                          /* bNumEndpoints */
                                         0x03,                          /* bInterfaceClass: HID */
                                         0x00,                          /* bInterfaceSubClass : 1=BOOT, 0=no boot */
                                         0x00,                          /* nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse */
                                         0,                             /* iInterface: Index of string descriptor */
                                         /******************** Descriptor of Custom HID ********************/
                                         0x09,                        /* bLength: HID Descriptor size */
                                         HID_DESCRIPTOR_TYPE_HID,     /* bDescriptorType: HID */
                                         0x11,                        /* bcdHID: HID Class Spec release number */
                                         0x01, 0x00,                  /* bCountryCode: Hardware target country */
                                         0x01,                        /* bNumDescriptors: Number of HID class descriptors to follow */
                                         0x22,                        /* bDescriptorType */
                                         HID_CUSTOM_REPORT_DESC_SIZE, /* wItemLength: Total length of Report descriptor */
                                         0x00,
                                         /******************** Descriptor of Custom in endpoint ********************/
                                         0x07,                         /* bLength: Endpoint Descriptor size */
                                         USB_DESCRIPTOR_TYPE_ENDPOINT, /* bDescriptorType: */
                                         HIDRAW_IN_EP,                 /* bEndpointAddress: Endpoint Address (IN) */
                                         0x03,                         /* bmAttributes: Interrupt endpoint */
                                         WBVAL(HIDRAW_IN_EP_SIZE),     /* wMaxPacketSize: 4 Byte max */
                                         HIDRAW_IN_INTERVAL,           /* bInterval: Polling Interval */
                                         /******************** Descriptor of Custom out endpoint ********************/
                                         0x07,                         /* bLength: Endpoint Descriptor size */
                                         USB_DESCRIPTOR_TYPE_ENDPOINT, /* bDescriptorType: */
                                         HIDRAW_OUT_EP,                /* bEndpointAddress: Endpoint Address (IN) */
                                         0x03,                         /* bmAttributes: Interrupt endpoint */
                                         WBVAL(HIDRAW_OUT_EP_SIZE),    /* wMaxPacketSize: 4 Byte max */
                                         HIDRAW_OUT_EP_INTERVAL,       /* bInterval: Polling Interval */
                                         /* 73 */
                                         /*
                                          * string0 descriptor
                                          */
                                         USB_LANGID_INIT(USBD_LANGID_STRING),
                                         /*
                                          * string1 descriptor
                                          */
                                         0x1a,                       /* bLength */
                                         USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
                                         'S', 0x00,                  /* wcChar0 */
                                         'O', 0x00,                  /* wcChar1 */
                                         'N', 0x00,                  /* wcChar2 */
                                         'A', 0x00,                  /* wcChar3 */
                                         'V', 0x00,                  /* wcChar4 */
                                         'O', 0x00,                  /* wcChar5 */
                                         'X', 0x00,                  /* wcChar6 */
                                         ' ', 0x00,                  /* wcChar7 */
                                         'M', 0x00,                  /* wcChar8 */
                                         'S', 0x00,                  /* wcChar9 */
                                         'C', 0x00,                  /* wcChar10 */
                                         'S', 0x00,                  /* wcChar11 */
                                         /*
                                          * string2 descriptor
                                          */
                                         0x24,                       /* bLength */
                                         USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
                                         'A', 0x00,                  /* wcChar0 */
                                         'T', 0x00,                  /* wcChar1 */
                                         'L', 0x00,                  /* wcChar2 */
                                         'A', 0x00,                  /* wcChar3 */
                                         'S', 0x00,                  /* wcChar4 */
                                         ' ', 0x00,                  /* wcChar13 */
                                         'V', 0x00,                  /* wcChar14 */
                                         'O', 0x00,                  /* wcChar15 */
                                         'L', 0x00,                  /* wcChar16 */
                                         'T', 0x00,                  /* wcChar17 */
                                         'A', 0x00,                  /* wcChar18 */
                                         'G', 0x00,                  /* wcChar19 */
                                         'E', 0x00,                  /* wcChar20 */
                                         ' ', 0x00,                  /* wcChar21 */
                                         'R', 0x00,                  /* wcChar22 */
                                         'E', 0x00,                  /* wcChar23 */
                                         'C', 0x00,                  /* wcChar24 */
                                         /*
                                          * string3 descriptor
                                          */
                                         0x16,                       /* bLength */
                                         USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
                                         '2', 0x00,                  /* wcChar0 */
                                         '0', 0x00,                  /* wcChar1 */
                                         '2', 0x00,                  /* wcChar2 */
                                         '3', 0x00,                  /* wcChar3 */
                                         '/', 0x00,                  /* wcChar3 */
                                         '1', 0x00,                  /* wcChar4 */
                                         '2', 0x00,                  /* wcChar5 */
                                         '/', 0x00,                  /* wcChar6 */
                                         '1', 0x00,                  /* wcChar7 */
                                         '5', 0x00,                  /* wcChar8 */
#ifdef CONFIG_USB_HS
                                         /*
                                          * device qualifier descriptor
                                          */
                                         0x0a, USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER, 0x00, 0x02, 0x00, 0x00, 0x00, 0x40, 0x01, 0x00,
#endif
                                         0x00};
/*!< custom hid report descriptor */
static const uint8_t hid_custom_report_desc[HID_CUSTOM_REPORT_DESC_SIZE] = {
    /* USER CODE BEGIN 0 */
    0x05, 0x8c, /* USAGE_PAGE (Vendor Defined Page 1) */
    0x09, 0x01, /* USAGE (Vendor Usage 1) */
    0xa1, 0x01, /* COLLECTION (Application) */
                // <___________________________________________________>
    // 0x85, 0x02,       /*   REPORT ID (0x02) */
    0x09, 0x03,       /*   USAGE (Vendor Usage 1) */
    0x15, 0x00,       /*   LOGICAL_MINIMUM (0) */
    0x26, 0xff, 0x00, /*   LOGICAL_MAXIMUM (255) */
    0x75, 0x08,       /*   REPORT_SIZE (8) */
    0x95, 0x40,       /*   REPORT_COUNT (64) */
    0x81, 0x02,       /*   INPUT (Data,Var,Abs) */
                      //<___________________________________________________>
    // 0x85, 0x02,       /*   REPORT ID (0x02) */
    0x09, 0x04,       /*   USAGE (Vendor Usage 1) */
    0x15, 0x00,       /*   LOGICAL_MINIMUM (0) */
    0x26, 0xff, 0x00, /*   LOGICAL_MAXIMUM (255) */
    0x75, 0x08,       /*   REPORT_SIZE (8) */
    0x95, 0x40,       /*   REPORT_COUNT (64) */
    0x91, 0x02,       /*   OUTPUT (Data,Var,Abs) */
    /* USER CODE END 0 */
    0xC0 /*     END_COLLECTION	             */
};

USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t read_buffer[HIDRAW_OUT_EP_SIZE];
USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t send_buffer[HIDRAW_IN_EP_SIZE];

#define HID_STATE_IDLE 0
#define HID_STATE_BUSY 1

/*!< hid state ! Data can be sent only when state is idle  */
static volatile uint8_t custom_state;

void usbd_event_handler(uint8_t event)
{
    switch (event)
    {
    case USBD_EVENT_RESET:
        break;
    case USBD_EVENT_CONNECTED:
        USB_LOG_RAW("Host Connected\n");
        break;
    case USBD_EVENT_DISCONNECTED:
        USB_LOG_RAW("Host DisConnected\n");
        dev_rec.start = 0;
        break;
    case USBD_EVENT_RESUME:
        break;
    case USBD_EVENT_SUSPEND:
        break;
    case USBD_EVENT_CONFIGURED:
        /* setup first out ep read transfer */
        usbd_ep_start_read(HIDRAW_OUT_EP, read_buffer, HIDRAW_OUT_EP_SIZE);
        break;
    case USBD_EVENT_SET_REMOTE_WAKEUP:
        break;
    case USBD_EVENT_CLR_REMOTE_WAKEUP:
        break;

    default:
        break;
    }
}

static void usbd_hid_custom_in_callback(uint8_t ep, uint32_t nbytes)
{
    USB_LOG_RAW("actual in len:%d\r\n", nbytes);
    custom_state = HID_STATE_IDLE;
}

// 收到的数据中不包含Report ID，是实际长度 即64字节
static void usbd_hid_custom_out_callback(uint8_t ep, uint32_t nbytes)
{
    USB_LOG_RAW("actual out len:%d\r\n", nbytes);
    usbd_ep_start_read(HIDRAW_OUT_EP, read_buffer, 64);
    for (uint8_t i = 0; i < 64; i++)
    {
        rt_kprintf("%02x ", read_buffer[i]);
    }
    rt_kprintf("\r\n");
    dev_rec.cmd = read_buffer[1];
    switch (dev_rec.cmd)
    {
    case SET_RELAY_VALUE:
        set_relay(read_buffer[2]);
        break;
    case GET_INFO_INDS:
    case SET_AC_VOLTAGE:
    case SET_DC_VOLTAGE:
    case GET_MES_VALUE: // 读取测量值
                        // char *cmd = ":READ?\r\n";
                        // uart_send_data(cmd, strlen(cmd));
                        // break;
        uart_send_data(&read_buffer[2], read_buffer[0]);
        break;
    case SET_PARAM_VALUE: // 设置参数
        dev_rec.period = read_buffer[2] * 256 + read_buffer[3];
        dev_rec.ch = read_buffer[4];
        dev_rec.cmd = 0;
        // timer_set_timeout(dev_rec.period);
        break;
    case SET_START_REC: // 开始或者停止采集
    case SET_STOP_REC:
        dev_rec.start = read_buffer[2];
        dev_rec.start ? timer_set_timeout(dev_rec.period) : timer_stop();
        break;
    default:
        break;
    }

    // rt_kprintf("\n");
    // usbd_ep_start_write(HIDRAW_IN_EP, read_buffer, nbytes);
}

static struct usbd_endpoint custom_in_ep = {.ep_cb = usbd_hid_custom_in_callback, .ep_addr = HIDRAW_IN_EP};

static struct usbd_endpoint custom_out_ep = {.ep_cb = usbd_hid_custom_out_callback, .ep_addr = HIDRAW_OUT_EP};

/* function ------------------------------------------------------------------*/
/**
 * @brief            hid custom init
 * @pre              none
 * @param[in]        none
 * @retval           none
 */
struct usbd_interface intf0;

void hid_custom_init(void)
{
    usbd_desc_register(hid_descriptor);
    usbd_add_interface(usbd_hid_init_intf(&intf0, hid_custom_report_desc, HID_CUSTOM_REPORT_DESC_SIZE));
    usbd_add_endpoint(&custom_in_ep);
    usbd_add_endpoint(&custom_out_ep);

    usbd_initialize();
}
// 发送时 会自动把id放在最前边 默认是0 上位机接收的数据长度是65
void hid_send_data(uint8_t *data, uint8_t len)
{
    uint8_t buf[64];
    memset(buf, 0, len);
    memcpy(buf, data, len);
    // for (uint8_t i = 0; i < len; i++)
    // {
    //     rt_kprintf("%02x ", data[i]);
    // }
    // rt_kprintf("\r\n");
    int ret = usbd_ep_start_write(HIDRAW_IN_EP, buf, 64);
    if (ret < 0)
    {
        return;
    }
}
// MSH_CMD_EXPORT(hid_custom_test, start hid_custom_test);

原理图

DMM_VOLTAGE_MES_F103.pdf