USBD — 复合设备: HID + 打印机

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#include "hid_printer_wrapper.h"
#include "usbd_hw.h"

void key_config(void);
void led_config(void);

/*!
    \brief      main routine
    \param[in]  none
    \param[out] none
    \retval     none
*/
int main(void)
{
    /* led configuration */
    led_config();

    /* key configuration */
    key_config();

    /* system clocks configuration */
    rcu_config();

    /* GPIO configuration */
    gpio_config();

    /* USB device configuration */
    usbd_init(&usbd_hid_printer, &hid_printer_desc, &hid_printer_class);

    /* NVIC configuration */
    nvic_config();

    /* enabled USB pull-up */
    usbd_connect(&usbd_hid_printer);

    while(USBD_CONFIGURED != usbd_hid_printer.cur_status) {
        /* wait for standard USB enumeration is finished */
    }

    while(1) {
    }
}

void key_config(void)
{
    /* keys configuration */
    gd_eval_key_init(KEY_USER1, KEY_MODE_EXTI);
    gd_eval_key_init(KEY_WAKEUP, KEY_MODE_EXTI);
}

void led_config(void)
{
    /* initialize LEDs */
    gd_eval_led_init(LED2);
    gd_eval_led_init(LED3);
    gd_eval_led_init(LED4);
    gd_eval_led_init(LED5);
}