/*
 * 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_ */