add msc multiple lun support

- remove CFG_TUD_MSC_MAXLUN
- add tud_msc_maxlun_cb()
- add msc_dual_lun exmaple

2 files changed, 7 insertions, 8 deletions

diff --git a/src/class/msc/msc_device.c b/src/class/msc/msc_device.c
index a6b65557c..e2cf92324 100644
--- a/src/class/msc/msc_device.c
+++ b/src/class/msc/msc_device.c
@@ -163,8 +163,10 @@ bool mscd_control_request(uint8_t rhport, tusb_control_request_t const * p_reque
 

     case MSC_REQ_GET_MAX_LUN:

     {

-      // returned MAX LUN is minus 1 by specs

-      uint8_t maxlun = CFG_TUD_MSC_MAXLUN-1;

+      // MAX LUN is minus 1 by specs

+      uint8_t maxlun = 0;

+      if (tud_msc_maxlun_cb) maxlun = tud_msc_maxlun_cb() -1;

+

       usbd_control_xfer(rhport, p_request, &maxlun, 1);

     }

     break;

diff --git a/src/class/msc/msc_device.h b/src/class/msc/msc_device.h
index 3ed223509..6e3aef8bb 100644
--- a/src/class/msc/msc_device.h
+++ b/src/class/msc/msc_device.h
@@ -40,12 +40,6 @@
 //--------------------------------------------------------------------+

 TU_VERIFY_STATIC(CFG_TUD_MSC_BUFSIZE < UINT16_MAX, "Size is not correct");

 

-#ifndef CFG_TUD_MSC_MAXLUN

-  #define CFG_TUD_MSC_MAXLUN 1

-#elif CFG_TUD_MSC_MAXLUN == 0 || CFG_TUD_MSC_MAXLUN > 16

-  #error MSC Device: Incorrect setting of MAX LUN

-#endif

-

 #ifndef CFG_TUD_MSC_BUFSIZE

   #error CFG_TUD_MSC_BUFSIZE must be defined, value of a block size should work well, the more the better

 #endif

@@ -134,6 +128,9 @@ int32_t tud_msc_scsi_cb (uint8_t lun, uint8_t const scsi_cmd[16], void* buffer,
 

 /*------------- Optional callbacks -------------*/

 

+// Invoked to determine max LUN

+ATTR_WEAK uint8_t tud_msc_maxlun_cb(void);

+

 // Invoked when Read10 command is complete

 ATTR_WEAK void tud_msc_read10_complete_cb(uint8_t lun);