thermapp.h

/***************************************************************************
* Copyright (C) 2015 by Alexander G
*
* 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/>.
*
***************************************************************************/

#ifndef THERMAPP_H_
#define THERMAPP_H_

#include <stdio.h>      // for FILE*
#include <pthread.h>

#include <libusb-1.0/libusb.h>

#if defined(_WIN32) || defined(__CYGWIN__) || defined(_WIN32_WCE)
#define THERMAPP_CALL WINAPI
#else
#define THERMAPP_CALL
#endif

#ifdef __cplusplus
extern "C" {
#endif

#define VENDOR	(0x1772)
#define PRODUCT	(0x0002)

#define PACKET_SIZE	(221688)
#define PIXELS_DATA_SIZE	(384*288)
#define FRAME_START_HEADER  (0xa5d5a5a5)
#define FRAME_STOP_HEADER   (0xa5a5a5a5)

// My Banana Pi works fine only at these settings
#define DEFAULT_BUF_LENGTH (16384)
#define DEFAULT_BUF_NUMBER (PACKET_SIZE / (DEFAULT_BUF_LENGTH))
#define DEFAULT_BUF_REMAIN (DEFAULT_BUF_NUMBER * DEFAULT_BUF_LENGTH)

#if ((DEFAULT_BUF_REMAIN % 512) != 0) /* len must be multiple of 512 */
#error "DEFAULT_BUF_LENGTH"
#endif

#define BULK_TIMEOUT 0

#ifndef FALSE
	#define FALSE 0
	#define TRUE 1
#endif

#pragma pack(push, 1)
// AD5628 DAC in ThermApp is for generating control voltage
// VREF = 2.5 volts 11 Bit
struct cfg_packet {
	unsigned int none_volatile_data0;
	unsigned int none_volatile_data1;
    unsigned short modes;            // 0xXXXM  Modes set last nibble
	unsigned short none_volatile_dbyte0;
	unsigned int none_volatile_data2;
	unsigned int none_volatile_data3;
	unsigned int none_volatile_data4;
	unsigned int none_volatile_data5;
	unsigned int none_volatile_data6;
    unsigned short VoutA;            // DCoffset; AD5628 VoutA
    unsigned short none_volatile_data7;
    unsigned short VoutC;            // gain; AD5628 VoutC
    unsigned short VoutD;            // AD5628 VoutD
    unsigned short VoutE;            // AD5628 VoutE
    unsigned short none_volatile_data8;
	unsigned int none_volatile_data9;
	unsigned int none_volatile_data10;
	unsigned int none_volatile_data11;
	unsigned int none_volatile_data12;
	unsigned int none_volatile_data13;
};

typedef struct _thermapp_packet {
	short some_data0;
	int id;
	unsigned char some_data1[16];
	short temperature;
	unsigned char some_data2[20];
    unsigned short frame_count;
	unsigned char some_data3[10];
	short pixels_data[PIXELS_DATA_SIZE];
	unsigned char some_data4[448];
} thermapp_packet;
#pragma pack(pop)

enum thermapp_async_status {
	THERMAPP_INACTIVE = 0,
	THERMAPP_CANCELING,
	THERMAPP_RUNNING
};

typedef void(*thermapp_read_async_cb_t)(unsigned char *buf, uint32_t len, void *ctx);

typedef struct thermapp {
    pthread_t pthreadReadAsync;
    pthread_t pthreadReadPipe;

	pthread_mutex_t mutex_thermapp;

	pthread_cond_t  cond_pipe,
					cond_getimage;

	int id;
	short temperature;
    unsigned short frame_count;

    libusb_device_handle *dev;
	libusb_context *ctx;
	struct libusb_transfer *transfer_in;
	struct libusb_transfer *transfer_out;

	char pipe_name[128];
	int fd_pipe_wr;
	int fd_pipe_rd;
    int pipe_create;

    unsigned int xfer_buf_num;
    unsigned int xfer_buf_len;
	struct libusb_transfer **xfer;
	unsigned char **xfer_buf;
	thermapp_read_async_cb_t cb;
	void *cb_ctx;
	unsigned int xfer_errors;
	enum thermapp_async_status async_status;
	int async_cancel;
	int dev_lost;

    struct cfg_packet *cfg;
    thermapp_packet *therm_packet;
    int lost_packet;
	int is_NewFrame;
} ThermApp;

/* Function Prototypes */
ThermApp*  thermapp_initUSB(void);
int        thermapp_USB_checkForDevice(ThermApp *thermapp, int vendor, int product);

int        thermapp_SendConfigurationHeader(ThermApp *thermapp, unsigned char *data, int length);
thermapp_packet* thermapp_FrameCapture(ThermApp *thermapp);

int        thermapp_FrameRequest_thread(ThermApp *thermapp);
int        thermapp_GetImage(ThermApp *thermapp, short *ImgData);
int        thermapp_ParsingUsbPacket(ThermApp *thermapp, short *ImgData);

void       thermapp_setGain(ThermApp *thermapp, unsigned short gain);
unsigned short thermapp_getGain(ThermApp *thermapp);

int        thermapp_getId(ThermApp *thermapp);
float      thermapp_getTemperature(ThermApp *thermapp);
unsigned short thermapp_getFrameCount(ThermApp *thermapp);
unsigned short thermapp_getDCoffset(ThermApp *thermapp);
void       thermapp_setDCoffset(ThermApp *thermapp, unsigned short offset);

int        thermapp_CalibrateFile(ThermApp *thermapp, FILE *file);

int        thermapp_read_async(ThermApp *thermapp, thermapp_read_async_cb_t cb, void *ctx);
int        thermapp_cancel_async(ThermApp *thermapp);
int        thermapp_Close(ThermApp *thermapp);

#ifdef __cplusplus
}
#endif

#endif /* THERMAPP_H_ */