[libsigrok.git] / hardware / norma-dmm / protocol.h

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 Matthias Heidbrink <m-sigrok@heidbrink.biz>
 *
 * 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 LIBSIGROK_HARDWARE_NORMA_DMM_PROTOCOL_H
#define LIBSIGROK_HARDWARE_NORMA_DMM_PROTOCOL_H

#include <stdint.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <math.h>
#include <glib.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"

#define LOG_PREFIX "norma-dmm"

#define NMADMM_BUFSIZE  256

/** Norma DMM request types (used ones only, the DMMs support about 50). */
enum {
	NMADMM_REQ_IDN = 0,	/**< Request identity */
	NMADMM_REQ_STATUS,	/**< Request device status (value + ...) */
};

/** Defines requests used to communicate with device. */
struct nmadmm_req {
	int req_type;		/**< Request type. */
	const char *req_str;	/**< Request string. */
};

/** Strings for requests. */
extern const struct nmadmm_req nmadmm_requests[];

/** Private, per-device-instance driver context. */
struct dev_context {
	/* Model-specific information */
	char *version;		/**< Version string */
	int type;		/**< DM9x0, e.g. 5 = DM950 */

	/* Acquisition settings */
	uint64_t limit_samples;	/**< Target number of samples */
	uint64_t limit_msec;	/**< Target sampling time */

	/* Opaque pointer passed in by frontend. */
	void *cb_data;

	/* Operational state */
	int last_req;			/**< Last request. */
	gboolean last_req_pending;	/**< Last request not answered yet. */
	int lowbatt;			/**< Low battery. 1=low, 2=critical. */

	/* Temporary state across callbacks */
	uint64_t num_samples;		/**< Current #samples. */
	GTimer *elapsed_msec;		/**< Used for limit_msec */
	uint8_t buf[NMADMM_BUFSIZE];	/**< Buffer for read callback */
	int buflen;			/**< Data len in buf */
};

SR_PRIV int norma_dmm_receive_data(int fd, int revents, void *cb_data);
SR_PRIV int xgittoint(char xgit);

#endif
Commit	Line	Data
bfd48770 MH	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2013 Matthias Heidbrink <m-sigrok@heidbrink.biz>
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#ifndef LIBSIGROK_HARDWARE_NORMA_DMM_PROTOCOL_H
	21	#define LIBSIGROK_HARDWARE_NORMA_DMM_PROTOCOL_H
	22
	23	#include <stdint.h>
e790bd5c UH	24	#include <string.h>
	25	#include <ctype.h>
	26	#include <errno.h>
	27	#include <math.h>
bfd48770 MH	28	#include <glib.h>
	29	#include "libsigrok.h"
	30	#include "libsigrok-internal.h"
	31
3544f848	32	#define LOG_PREFIX "norma-dmm"
bfd48770	33
f8e76e2e MH	34	#define NMADMM_BUFSIZE 256
f8e76e2e MH	35
e790bd5c UH	36	/** Norma DMM request types (used ones only, the DMMs support about 50). */
e790bd5c UH	37	enum {
f8e76e2e MH	38	NMADMM_REQ_IDN = 0, /*< Request identity /
	39	NMADMM_REQ_STATUS, /*< Request device status (value + ...) /
	40	};
	41
	42	/** Defines requests used to communicate with device. */
	43	struct nmadmm_req {
e790bd5c UH	44	int req_type; /*< Request type. /
e790bd5c UH	45	const char req_str; /< Request string. /
f8e76e2e MH	46	};
	47
	48	/** Strings for requests. */
	49	extern const struct nmadmm_req nmadmm_requests[];
	50
bfd48770 MH	51	/** Private, per-device-instance driver context. */
	52	struct dev_context {
	53	/* Model-specific information */
e790bd5c UH	54	char version; /< Version string /
	55	int type; /*< DM9x0, e.g. 5 = DM950 /
	56
bfd48770	57	/* Acquisition settings */
f8e76e2e MH	58	uint64_t limit_samples; /*< Target number of samples /
f8e76e2e MH	59	uint64_t limit_msec; /*< Target sampling time /
bfd48770	60
f8e76e2e MH	61	/* Opaque pointer passed in by frontend. */
f8e76e2e MH	62	void *cb_data;
bfd48770	63
f8e76e2e	64	/* Operational state */
e790bd5c UH	65	int last_req; /*< Last request. /
	66	gboolean last_req_pending; /*< Last request not answered yet. /
	67	int lowbatt; /*< Low battery. 1=low, 2=critical. /
	68
bfd48770	69	/* Temporary state across callbacks */
f8e76e2e	70	uint64_t num_samples; /*< Current #samples. /
e790bd5c UH	71	GTimer elapsed_msec; /< Used for limit_msec /
e790bd5c UH	72	uint8_t buf[NMADMM_BUFSIZE]; /*< Buffer for read callback /
f8e76e2e	73	int buflen; /*< Data len in buf /
bfd48770 MH	74	};
	75
	76	SR_PRIV int norma_dmm_receive_data(int fd, int revents, void *cb_data);
f8e76e2e	77	SR_PRIV int xgittoint(char xgit);
bfd48770 MH	78
bfd48770 MH	79	#endif