From a1f1941c3f965483e274993e43d18a9ede5e1f09 Mon Sep 17 00:00:00 2001
From: kkitayam <45088311+kkitayam@users.noreply.github.com>
Date: Sat, 27 Mar 2021 16:03:04 +0900
Subject: [PATCH] fixed a OUT transfer did not completed multiple of the max
 packet size

---
 src/portable/renesas/usba/dcd_usba.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/portable/renesas/usba/dcd_usba.c b/src/portable/renesas/usba/dcd_usba.c
index e7518b01f..844fa3856 100644
--- a/src/portable/renesas/usba/dcd_usba.c
+++ b/src/portable/renesas/usba/dcd_usba.c
@@ -261,7 +261,7 @@ static int write_fifo(volatile void *fifo, pipe_state_t* pipe, unsigned mps)
   return 0;
 }
 
-/* 1 if the number of bytes read is less than 64 bytes
+/* 1 if the number of bytes read is less than mps bytes
  * 0 otherwise */
 static int read_fifo(volatile void *fifo, pipe_state_t* pipe, unsigned mps, size_t len)
 {
@@ -272,12 +272,14 @@ static int read_fifo(volatile void *fifo, pipe_state_t* pipe, unsigned mps, size
 
   hw_fifo_t *reg = (hw_fifo_t*)fifo;
   uintptr_t addr = pipe->addr;
-  while (len--) {
+  unsigned  loop = len;
+  while (loop--) {
     *(uint8_t *)addr = reg->u8;
     ++addr;
   }
   pipe->addr = addr;
-  if (rem < mps) return 1;
+  if (rem < mps)  return 1;
+  if (rem == len) return 2;
   return 0;
 }
 
@@ -419,7 +421,7 @@ static bool process_pipe_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t* buffer,
       *ctr = USB_PIPECTR_PID_BUF;
     }
   }
-  //TU_LOG1("X %x %d\r\n", ep_addr, total_bytes);
+  //  TU_LOG1("X %x %d\r\n", ep_addr, total_bytes);
   return true;
 }