From 40d9554ed333c363fee2f384295b8bcf800a6a97 Mon Sep 17 00:00:00 2001
From: Cristian Maglie <c.maglie@arduino.cc>
Date: Fri, 24 Jun 2016 16:01:17 +0200
Subject: [PATCH] USB-CDC: Avoid need to send ZLP by sending up to (EPX_SIZE-1)
bytes at a time
---
cores/arduino/USB/USBCore.cpp | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/cores/arduino/USB/USBCore.cpp b/cores/arduino/USB/USBCore.cpp
index 23378443..1be72247 100644
--- a/cores/arduino/USB/USBCore.cpp
+++ b/cores/arduino/USB/USBCore.cpp
@@ -627,8 +627,8 @@ uint32_t USBDeviceClass::send(uint32_t ep, const void *data, uint32_t len)
// Flash area
while (len != 0)
{
- if (len >= 64) {
- length = 64;
+ if (len >= EPX_SIZE) {
+ length = EPX_SIZE - 1;
} else {
length = len;
}
--
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