56 lines
1.7 KiB
ReStructuredText
Executable File
56 lines
1.7 KiB
ReStructuredText
Executable File
MSC Host
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=================
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This section mainly introduces the use of Host MSC. Read and write functions are implemented with the help of FATFS.
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- Register a thread in the callback after MSC enumeration is completed, used for read and write operations.
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.. code-block:: C
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void usbh_msc_run(struct usbh_msc *msc_class)
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{
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usb_osal_thread_create("usbh_msc", 2048, CONFIG_USBHOST_PSC_PRIO + 1, usbh_msc_thread, msc_class);
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}
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void usbh_msc_stop(struct usbh_msc *msc_class)
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{
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}
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- Without using fatfs, directly use usbh_msc_scsi_read10 or usbh_msc_scsi_write10 functions for read and write operations.
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- 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`
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.. code-block:: C
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static void usbh_msc_thread(void *argument)
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{
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int ret;
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struct usbh_msc *msc_class = (struct usbh_msc *)argument;
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/* test with only one buffer, if you have more msc class, modify by yourself */
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#if 1
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/* get the partition table */
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ret = usbh_msc_scsi_read10(msc_class, 0, partition_table, 1);
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if (ret < 0) {
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USB_LOG_RAW("scsi_read10 error,ret:%d\r\n", ret);
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goto delete;
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}
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for (uint32_t i = 0; i < 512; i++) {
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if (i % 16 == 0) {
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USB_LOG_RAW("\r\n");
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}
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USB_LOG_RAW("%02x ", partition_table[i]);
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}
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USB_LOG_RAW("\r\n");
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#endif
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#if TEST_USBH_MSC_FATFS
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usb_msc_fatfs_test();
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#endif
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// clang-format off
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delete:
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usb_osal_thread_delete(NULL);
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// clang-format on
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}
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- Finally, after processing is completed or failed, delete the thread. |