Add CAN-USB for STM32F303

F3:F303/CANusb/usb.h

@@ -0,0 +1,41 @@
+/*
+ * This file is part of the canusb project.
+ * Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "usbhw.h"
+
+// sizes of ringbuffers for outgoing and incoming data
+#define RBOUTSZ     (512)
+#define RBINSZ      (512)
+
+#define newline() USB_putbyte('\n')
+
+#ifdef EBUG
+#define DBG(str)  do{USB_sendstr(__FILE__ " (L" STR(__LINE__) "): " str);}while(0)
+#else
+#define DBG(str)
+#endif
+
+void USB_proc();
+int USB_sendall();
+int USB_send(const uint8_t *buf, int len);
+int USB_putbyte(uint8_t byte);
+int USB_sendstr(const char *string);
+int USB_receive(uint8_t *buf, int len);
+int USB_receivestr(char *buf, int len);