USBD — USB CDC ACM 虚拟串口

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#include "cdc_acm_core.h"
#include "usbd_hw.h"

int main(void)
{
    /* system clocks configuration */
    rcu_config();

    /* GPIO configuration */
    gpio_config();

    /* USB device configuration */
    usbd_init(&usbd_cdc, &cdc_desc, &cdc_class);

    /* NVIC configuration */
    nvic_config();

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

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

    while(1) {
        if(0U == cdc_acm_check_ready(&usbd_cdc)) {
            cdc_acm_data_receive(&usbd_cdc);
        } else {
            cdc_acm_data_send(&usbd_cdc);
        }
    }
}