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diff --git a/src/hardware/agilent-dmm/agilent-dmm.h b/src/hardware/agilent-dmm/agilent-dmm.h
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+++ b/src/hardware/agilent-dmm/agilent-dmm.h
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+/*
+ * This file is part of the libsigrok project.
+ *
+ * Copyright (C) 2012 Bert Vermeulen <bert@biot.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/>.
+ */
+
+#ifndef LIBSIGROK_HARDWARE_AGILENT_DMM_AGILENT_DMM_H
+#define LIBSIGROK_HARDWARE_AGILENT_DMM_AGILENT_DMM_H
+
+#define LOG_PREFIX "agilent-dmm"
+
+#define AGDMM_BUFSIZE  256
+
+/* Supported models */
+enum {
+	AGILENT_U1231A = 1,
+	AGILENT_U1232A,
+	AGILENT_U1233A,
+	AGILENT_U1251A,
+	AGILENT_U1252A,
+	AGILENT_U1253A,
+};
+
+/* Supported device profiles */
+struct agdmm_profile {
+	int model;
+	const char *modelname;
+	const struct agdmm_job *jobs;
+	const struct agdmm_recv *recvs;
+};
+
+/* Private, per-device-instance driver context. */
+struct dev_context {
+	const struct agdmm_profile *profile;
+	uint64_t limit_samples;
+	uint64_t limit_msec;
+
+	/* Opaque pointer passed in by the frontend. */
+	void *cb_data;
+
+	/* Runtime. */
+	uint64_t num_samples;
+	int64_t jobqueue[8];
+	unsigned char buf[AGDMM_BUFSIZE];
+	int buflen;
+	int cur_mq;
+	int cur_unit;
+	int cur_mqflags;
+	int cur_divider;
+	int cur_acdc;
+	int mode_tempaux;
+	int mode_continuity;
+};
+
+struct agdmm_job {
+	int interval;
+	int (*send) (const struct sr_dev_inst *sdi);
+};
+
+struct agdmm_recv {
+	const char *recv_regex;
+	int (*recv) (const struct sr_dev_inst *sdi, GMatchInfo *match);
+};
+
+SR_PRIV int agdmm_receive_data(int fd, int revents, void *cb_data);
+
+#endif