From 6ace84b08962baff5baae09443e9d4f968d11e84 Mon Sep 17 00:00:00 2001
From: Pavol Rusnak <stick@gk2.sk>
Date: Wed, 28 Dec 2016 18:56:03 +0100
Subject: stmhal: Implement ioctl for USB HID read.

---
 stmhal/usb.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'stmhal/usb.c')

diff --git a/stmhal/usb.c b/stmhal/usb.c
index ac85c5371..7eb3f179a 100644
--- a/stmhal/usb.c
+++ b/stmhal/usb.c
@@ -636,6 +636,9 @@ STATIC mp_uint_t pyb_usb_hid_ioctl(mp_obj_t self_in, mp_uint_t request, mp_uint_
     if (request == MP_STREAM_POLL) {
         mp_uint_t flags = arg;
         ret = 0;
+        if ((flags & MP_STREAM_POLL_RD) && USBD_HID_RxNum() > 0) {
+            ret |= MP_STREAM_POLL_RD;
+        }
         if ((flags & MP_STREAM_POLL_WR) && USBD_HID_CanSendReport(&hUSBDDevice)) {
             ret |= MP_STREAM_POLL_WR;
         }
-- 
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