1 files changed, 63 insertions, 0 deletions

diff --git a/lib/chibios-contrib/os/hal/include/usbh/desciter.h b/lib/chibios-contrib/os/hal/include/usbh/desciter.h
new file mode 100644
index 000000000..bab2f0457
--- /dev/null
+++ b/lib/chibios-contrib/os/hal/include/usbh/desciter.h
@@ -0,0 +1,63 @@
+/*
+    ChibiOS - Copyright (C) 2006..2017 Giovanni Di Sirio
+              Copyright (C) 2015..2019 Diego Ismirlian, (dismirlian(at)google's mail)
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+
+#ifndef USBH_DESCITER_H_
+#define USBH_DESCITER_H_
+
+#include "hal.h"
+
+#if HAL_USE_USBH
+
+#include "usbh/defs.h"
+
+
+/* DESCRIPTOR PARSING */
+#define _generic_iterator_fields \
+        const uint8_t *curr;    \
+        uint16_t rem;   \
+        bool valid;
+
+typedef struct {
+        _generic_iterator_fields
+} generic_iterator_t;
+
+typedef struct {
+        _generic_iterator_fields
+        const usbh_ia_descriptor_t *iad;
+} if_iterator_t;
+
+void cfg_iter_init(generic_iterator_t *icfg, const uint8_t *buff, uint16_t rem);
+void if_iter_init(if_iterator_t *iif, const generic_iterator_t *icfg);
+void ep_iter_init(generic_iterator_t *iep, const if_iterator_t *iif);
+void cs_iter_init(generic_iterator_t *ics, const generic_iterator_t *iter);
+void if_iter_next(if_iterator_t *iif);
+void ep_iter_next(generic_iterator_t *iep);
+void cs_iter_next(generic_iterator_t *ics);
+static inline const usbh_config_descriptor_t *cfg_get(generic_iterator_t *icfg) {
+        return (const usbh_config_descriptor_t *)icfg->curr;
+}
+static inline const usbh_interface_descriptor_t *if_get(if_iterator_t *iif) {
+        return (const usbh_interface_descriptor_t *)iif->curr;
+}
+static inline const usbh_endpoint_descriptor_t *ep_get(generic_iterator_t *iep) {
+        return (const usbh_endpoint_descriptor_t *)iep->curr;
+}
+
+#endif
+
+#endif /* USBH_DESCITER_H_ */