MSC Host

This section mainly introduces the use of Host MSC. Read and write functions are implemented with the help of FATFS.

• Register a thread in the callback after MSC enumeration is completed, used for read and write operations.

void usbh_msc_run(struct usbh_msc *msc_class)
{
    usb_osal_thread_create("usbh_msc", 2048, CONFIG_USBHOST_PSC_PRIO + 1, usbh_msc_thread, msc_class);
}

void usbh_msc_stop(struct usbh_msc *msc_class)
{
}

• Without using fatfs, directly use usbh_msc_scsi_read10 or usbh_msc_scsi_write10 functions for read and write operations.

• If using fatfs, you need to call fatfs interfaces in usbh_msc_thread for read and write operations. For MSC read/write adaptation to fatfs, refer to platform/fatfs/usbh_fatfs.c

static void usbh_msc_thread(void *argument)
{
    int ret;
    struct usbh_msc *msc_class = (struct usbh_msc *)argument;

    /* test with only one buffer, if you have more msc class, modify by yourself */
#if 1
    /* get the partition table */
    ret = usbh_msc_scsi_read10(msc_class, 0, partition_table, 1);
    if (ret < 0) {
        USB_LOG_RAW("scsi_read10 error,ret:%d\r\n", ret);
        goto delete;
    }
    for (uint32_t i = 0; i < 512; i++) {
        if (i % 16 == 0) {
            USB_LOG_RAW("\r\n");
        }
        USB_LOG_RAW("%02x ", partition_table[i]);
    }
    USB_LOG_RAW("\r\n");
#endif

#if TEST_USBH_MSC_FATFS
    usb_msc_fatfs_test();
#endif
    // clang-format off
delete:
    usb_osal_thread_delete(NULL);
    // clang-format on
}

• Finally, after processing is completed or failed, delete the thread.