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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.
.. code-block:: C
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`
.. code-block:: 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.
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