From 7a15d2e0d25a8fad65c27477c0dbf62bebac2196 Mon Sep 17 00:00:00 2001 From: hathach Date: Thu, 28 May 2020 00:56:33 +0700 Subject: [PATCH] improve msc --- src/class/msc/msc_device.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/src/class/msc/msc_device.c b/src/class/msc/msc_device.c index 9955f2f05..0ae25f89a 100644 --- a/src/class/msc/msc_device.c +++ b/src/class/msc/msc_device.c @@ -161,22 +161,22 @@ uint16_t mscd_open(uint8_t rhport, tusb_desc_interface_t const * itf_desc, uint1 MSC_SUBCLASS_SCSI == itf_desc->bInterfaceSubClass && MSC_PROTOCOL_BOT == itf_desc->bInterfaceProtocol, 0); - // Max length mus be at least 1 interface + 2 endpoints - TU_VERIFY(max_len >= sizeof(tusb_desc_interface_t) + 2*sizeof(tusb_desc_endpoint_t), 0); + // msc driver length is fixed + enum { _MSC_DRIVER_LEN = sizeof(tusb_desc_interface_t) + 2*sizeof(tusb_desc_endpoint_t) }; + + // Max length mus be at least 1 interface + 2 endpoints + TU_VERIFY(max_len >= _MSC_DRIVER_LEN, 0); - uint16_t len = 0; mscd_interface_t * p_msc = &_mscd_itf; + p_msc->itf_num = itf_desc->bInterfaceNumber; // Open endpoint pair TU_ASSERT( usbd_open_edpt_pair(rhport, tu_desc_next(itf_desc), 2, TUSB_XFER_BULK, &p_msc->ep_out, &p_msc->ep_in), 0 ); - p_msc->itf_num = itf_desc->bInterfaceNumber; - len = sizeof(tusb_desc_interface_t) + 2*sizeof(tusb_desc_endpoint_t); - // Prepare for Command Block Wrapper TU_ASSERT( usbd_edpt_xfer(rhport, p_msc->ep_out, (uint8_t*) &p_msc->cbw, sizeof(msc_cbw_t)), 0 ); - return len; + return _MSC_DRIVER_LEN; } // Handle class control request