initial check in based on SVN revision 575

source/USB/usbComms.h

@@ -0,0 +1,73 @@
+/*
+ * usbComms.h
+ *
+ *  Created on: May 17, 2023
+ *      Author: Brian.Bailey
+ */
+
+#ifndef COMMS_USBCOMMS_H_
+#define COMMS_USBCOMMS_H_
+
+#include "virtual_com.h"	//required for USB_RX_BUFFER_SIZE
+
+/*******************************************************************************
+ * Definitions
+ ******************************************************************************/
+
+#define USB_RX_BUFFER_SIZE		512		//Size of rxDataBuffer in bytes (same size as USB_DATA_BUFFER)
+
+#define ACK						"ACK"
+#define NAK						"NAK"
+#define OK						"ACK"
+#define NO						"NAK"
+
+//Packet Mode
+#define USB_PACKET_START_BYTE	0xA5	//start byte
+#define USB_PACKET_HEADER_SIZE	3		//header size in bytes
+#define USB_PACKET_MAX_LENGTH	63	//503		//max length of packet including header
+#define USB_PACKET_MAX_PAYLOAD	60	//500		//max bytes for packet payload
+
+#define USB_PACKET_HEADER_OFFSET	0	//header byte offset
+#define USB_PACKET_LENGTH_H_OFFSET	1	//packet size high byte offset
+#define USB_PACKET_LENGTH_L_OFFSET	2	//packet size low byte offset
+#define USB_PACKET_PAYLOAD_OFFSET	3	//payload byte offset
+
+//PACKET FORMAT:
+	//PACKET_START byte
+	//Size byte high - Size of packet including header
+	//Size byte low
+	//Payload
+
+
+
+typedef struct
+{
+	uint8_t rxDataBuffer[USB_RX_BUFFER_SIZE];	//buffer for received data (copied from rxBuffer)
+	uint32_t rxDataIndex;						//index in rxDataBuffer
+	bool rxStringReceived;						//string received and ready to process
+
+	bool programMode;							//USB program mode: use packet format
+
+	uint32_t sendErrorCount;					//number of times USB_SendString() has failed to send
+	bool initialized;
+}USB_t;
+
+
+
+uint8_t USB_IsConnected(void);
+
+void USB_ProcessString(uint32_t size);
+void USB_ProcessCommand(void);
+void USB_ProcessProgramCommand(void);
+void USB_ProcessSystemCommand(void);
+void USB_ProcessFrequencyCommand(void);
+
+bool USB_CommandCompare(uint8_t *str);
+bool USB_CommandPrefixCompare(uint8_t *str);
+
+void USB_Send(uint8_t * data);
+
+
+
+
+#endif /* COMMS_USBCOMMS_H_ */